3.a3 b5 4.e3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b5).

3.a3 Qd6 4.Nf3 Nbd7 5.e3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 Nd7 5.e3 Ngf6).

3.a3 Bf5 4.e3 e6 5.Nf3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

3.Na3 e6 4.c3 c5 5.Qc2 (5.Nc2!?+=) 5...cb4-/+ 6.cb4 Bb4 7.Nb5 0-0?? (better is 7...Nc6-/+) 8.0-0-0?? (better is 8.Nc7 Nc6 9.Na8+=) 8...a6 9.Bf6 (9.Bc3 Be7 10.Bf6 Bf6-+ (worse is 10...gf6 11.Nc3-+)) 9…Qf6 (9...Qf6 10.Nc3 Qf2-+; 9...gf6?! 10.Nc3-+) 0–1. otseli – ilki (1725), gameknot.com, 2013.

4.a4 c5 5.e3 Nbd7 6.c4 e6 7.Nf3 g6 (7...Bd6!?=) 8.Be2 Bg7 9.0-0 b6 10.cd5 ed5 11.d4 0-0 12.Nc3 Bb7 13.Rc1 a5 14.Qb3 Rc8 Black prepares the advance c4 15.Rfd1 Qe7 16.h3 Rfd8 17.Ba3 Qe8 18.Nb1 c4 19.Qc2 Ne4 20.Nc3 f5 21.Ne4 fe4 22.Nd2 Nf6 23.Nf1 h5 24.Qd2 Kh7 25.f4 ef3 26.Bf3 Ne4 27.Qe1 Bh6 28.Be4 Qe4 29.Rc3 Rf8?? (29...Re8 30.Qg3=+) 30.Bc1?? (better 30.Nd2 Qe6 31.Bf8 Bf8 32.Qe2+/-) 30...Rf7 (30...Rce8 31.Rd2-/+) 31.Ng3 (31.Nd2 Qe6=+) 31...Qe6-/+ 32.e4 de4 33.Bh6 Kh6 34.d5 Bd5?? (better 34...Qe5 35.Ne4 Rd7 (worse 35...Bd5 36.Qd2 Rf4 37.Rf3+/-) 36.Qe3 Kg7=) 35.Qd2+- Kh7 36.Qd5 Qf6?? (better 36...Qd5 37.Rd5 e3+-) 37.Ne4 (better 37.Rf1!? Qf1 38.Nf1 Re7+-) 37...Qe7 (37...Qf5 38.Ng5 Kg8 39.Nf7 Qd5 40.Nh6 Kg7 41.Rd5 Kh6 42.Rd6+-) 38.Qf7! Qf7 39.Ng5 Kg7 40.Nf7 Kf7 41.Rd4 1-0. BeepBeepImAJeep (2575) - slipslapmonster (2490), lichess.org, 2016.

3.a4 Nbd7 4.b5 e5 5.g3 d4 6.Bg2 Be7 7.c3 (7.Nf3 Bd6=) 7...dc3 (7...d3!? 8.Nf3 e4-/+) 8.Bc3 (8.Nc3!? Nc5 9.Qc2=) 8...0-0 9.Nf3 Bd6 10.Ng5 (10.Na3!?=) 10...Nc5 11.Bb2 (11.0-0 h6 12.Nf3 e4=+) 11...h6-/+ 12.d4 (12.Nf3!? e4 13.Nd4-/+) 12...ed4-+ (12...hg5?! 13.de5 Be7 14.ef6 Qd1 15.Kd1 Bf6 16.Bf6 gf6 17.Nd2=+) 13.Nf3 d3! 14.ed3? (better 14.0-0 de2 15.Qe2-+) 14...Re8 15.Kf1 Bg4 (15...Bf5 16.Ra3-+) 16.h3 (16.d4 Nce4-+) 16...Bh5 (16...Bf5 17.Kg1-+) 17.g4? (17.d4 Nce4 18.Nbd2-+) 17...Bg6 18.d4 (18.Ra3 Nd5 19.Nh4 Qh4 20.Bd5 Rad8-+) 18...Nd3 19.Qb3 (19.Bc1 Ne4 20.Be3 Qe7-+) 19...Nb2 (better 19...Ne4 20.Nc3 Nef2-+) 20.Qb2 Bd3 (20...Nd5 21.Nc3 Nb4 22.Rd1-+) 21.Kg1 Re2 (better 21...c5!? 22.Nbd2 Qc7-+) 22.Nbd2 Qe7 (better 22...Bh7-/+) 23.Qc3?? (better 23.Bf1!?=) 23...Bg6 (23...Be4 24.Qc4 Bd5 25.Qd3-+) 24.Nh4? (24.Ne5 Be5 25.de5 Re5 (worse 25...Qe5 26.Qe5 Re5 27.Bb7=) 26.Bb7 Rb8-/+) 24...Re1 (24...Bh7 25.Nc4 Bb4 26.Qf3-+) 25.Re1 (better 25.Nf1!? Ra1 26.Qa1-+) 25...Qe1 26.Bf1 Ne4?? (better 26...Bb4! 27.Qb3 Qd2 (27...Bd2?! 28.Ng6 Ne4 29.Qf3 fg6 30.Kg2-+) 28.Ng6 Ne4-+) 27.Ne4= Be4?? (better 27...Qe4 28.Ng6 Qg6=) 28.Ng2 (better 28.Qe1 Bh1 29.Kh1+-) 28...Qc3-+ 29.h4 Re8 30.g5 hg5 (30...Bg2 31.Rh2 Bf1 32.Kf1 Qf3 33.gh6 Bh2 34.h7 Kh7 35.a5 Qh3) 31.hg5 Qd4 (31...Bg2 32.Kg2 Re4 33.Rh4 Rh4 34.f4 Qd2 35.Be2 Qe2 36.Kg3 Rh2 37.a5 Qg2) 32.g6 fg6 (32...Bg2 33.Rh5 Qg4 34.Rh4 Qh4 35.gf7 Kf7 36.Bc4 Kf6 37.Kg2 Qh2 38.Kf3 Qh3) 33.a5 Bg3 34.Rh3 (34.Ne3 Bf2! 35.Kf2 Rf8 36.Ke2 Qd3 37.Ke1 Qe3 38.Kd1 Rd8 39.Bd3 Rd3 40.Kc2 Rb3 41.Kd1 Rb1) 34...Qf2 35.Kh1 Qf1 0–1. hamidrezaderakhshan (1680) – Enrrike (1670), lichess.org, 2020.

3.a4 e5 4.Be5 Nc6 5.Bb2 Nb4 6.Nf3=+.

3.a4 Bg4 4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.a4).

3.b5 Ng4 4.e3= e5 (4...Nf6 5.Nf3+=) 5.h3 Nf6 6.Be5 Be6 7.Nf3 Nbd7 8.Bb2 Bd6 9.Be2 Rg8 (9...0-0!?+=) 10.Nd4 Ne5 11.f4 Ne4? (better is 11...Nc4!? 12.Bc4 dc4 13.Ne6 fe6+-) 12.0-0 (12.fe5?? Qh4 13.g3 Qg3 14.Kf1 Qf2; 12.Ne6?? Qh4 13.g3 Qg3 14.Kf1 Qf2) 12...Nc4 13.Ne6 fe6 14.Bc4 dc4 15.Qh5 Kd7 (15...Kf8 16.f5 e5 17.Qg4+-) 16.Qh7 (16.Qf3!? Nc5+-) 16...Ng3 17.Rf3 (17.Rf2 Nf5 18.Qh5 a6+-) 17...Nf5 18.g4 Nh4 (better is 18...Qh4 19.Qh4 Nh4+-) 19.Rf2 Qe7 20.Nc3 (20.Qe4 Kc8+-) 20...Rae8 (20...g5 21.Qe7 Be7 22.fg5 Rg5 23.Rf7+-) 21.Ne4 Qf8 (21...Ref8+-) 22.Nf6 (22.Nf6 Kc8 23.Ng8 (23.Qh4?! Be7+-) 23...Qg8 24.Qh4+-) 1–0. Taulien,Hans_Juergen (2350) – Hoeffer,David (1995), remoteschach.de, 2002.

3.c3 e5 4.d4 e4 5.Nd2 Bd6 6.e3 Bg4 7.f3 Bh5 (7...ef3 8.gf3 Bf5 9.Qe2-/+) 8.Nh3 Bg6 9.f4 h6 10.Be2 0-0 (10...Bf5 11.Nf2-/+) 11.Qc2 Nh7 (11...Qd7 12.a3=+) 12.g4 (12.Qb3 c6=) 12...f5 (12...Qh4 13.Nf2 Bf4 14.ef4=+) 13.Rg1 Qh4 14.Kd1?? (better 14.Nf2=+) 14...Qh3-+ 15.gf5 Bf5 16.Nf1 Nf6 17.Rg3 Qh4 18.Kd2 (18.Qb3 Bh3-+) 18...Nh5 (18...Bf4 19.Rg2 Kh7 20.c4-+) 19.Rg1 (19.Qb3 c6 (19...Ng3?! 20.Qd5 Kh8 21.hg3-+) 20.Bh5 Qh5-+) 19...Nd7 (better 19...Nf4!? 20.Qd1 Nd3 21.Kc2-+) 20.Re1 (20.Ng3 Ng3 21.hg3 Qf6-+) 20...Ndf6 (better 20...Nf4 21.Qb3 Nd3 22.Qd5 Kh8 23.Bd3 Qf2 24.Be2 Nb6-+) 21.Kc1 (21.Ng3 Ng3 22.hg3 Qh2-/+) 21...Ng4 (better 21...Qe1 22.Qd1 Qf2-+) 22.Bg4 (22.Qd1 Nhf6 23.Qd2 a5-+) 22...Bg4 (better 22...Qe1 23.Qd1 Qf2 24.Bf5 Rf5-+) 23.Qg2 (23.Ng3 Nf6 24.Qb3-+) 23...Qe1 24.Kc2 Qe2 (24...Qd1) 25.Kb1 (25.Qe2 Be2 26.Nd2 Bd3 27.Kd1 Nf4 28.ef4 Rf4-+) 25...Qg2 26.Rg2 Bf3 27.Rg1 a5 28.a3 ab4 29.cb4 b6 30.Nd2 c5 (30...Be2 31.Kc2-+) 31.dc5 bc5 32.bc5 (32.Nf3 ef3 33.Rf1 cb4 34.ab4 Rab8 35.Rf3 Rb4-+) 32...Bc5 33.Bd4 (33.Re1 Nf6-+) 33...Bd4 34.ed4 0–1. alt20 – dago, lichess.org, 2015.

3.c3 e6 4.h4 Bd7 5.d4 Nc6 6.a4 (6.Nf3 Bd6-/+) 6...a6 7.a5 Na7 (7...Bd6!?-/+) 8.Nd2=+ Bb5 9.Ngf3 Bd6 10.Ng5 (10.Qc2 0-0=+) 10...0-0 (10...h6 11.Ngf3-/+) 11.Nb3 (11.e4!? de4 12.Nde4 Ne4 13.Ne4=) 11...h6 12.Nf3 Ne4 13.Nfd2 f5 14.Ne4 (better 14.Nc5!? Qc8 15.e3-/+) 14...fe4-+ (14...de4?! 15.Qc2=+) 15.e3 Qf6 16.Qd2 Bf1 17.Kf1? (better 17.Rf1 Qh4 18.Kd1 Qg4 19.f3 ef3 20.Rf3 Rf3 21.gf3 Qf3 22.Qe2-+) 17...Bg3 18.Nc5 (18.Ke2 Qf2 19.Kd1 Qd2 20.Nd2-+) 18...Qf2 19.Qf2 Rf2 (19...Bf2?! 20.Ke2 Bg3 21.Raf1 Rf1 22.Rf1 Bh4 23.c4-/+) 20.Kg1 Rb2 21.Rh3 Bf2 22.Kh2 (22.Kh1 Nb5 23.Ne6 Nc3-+) 22...Nb5 23.Ne6 Nc3 24.Nc7 (24.Rc1 Nb5-+) 24...Rc8 25.Ne6 Nb1 (25...Na2!? 26.b5 ab5 27.Nc5-+) 26.Nf4 Be1 27.Nd5 Rcc2 28.Nf4 (28.Kh1 Bb4 29.Nb4 Rb4-+) 28...Bb4 29.h5 (29.Rg3 Bd6-+) 29...Bd6 30.Rg3 Nc3 31.Rg1 (31.Kh3 Rb5 32.Rg4 Bf4 33.Rf4 Re2-+) 31...Ra2 (31...Bf4 32.ef4 Ne2 33.Re1 Ng3 34.Kg3 Rg2 35.Kh4-+) 32.Rg6 Bf4 33.ef4 Ne2 (better 33...Ra5 34.Rf1-+) 34.Re1 (34.Rf1 Ra5 35.f5 Nd4-+) 34...Nf4 35.Rb6 (35.Re4 Ng6 36.hg6 Rg2 37.Kh1 Rge2 38.Re2 Re2-+) 35...Ng2 (35...Rg2 36.Kh1 Rh2 37.Kg1 Rag2 38.Kf1 Rh1) 36.Re4 Ne3 (36...Rc3 37.Re8 Kh7 38.Kg1 Nf4 39.Rh6 Kh6 40.Kf1 Rf3 41.Ke1 Nd3 42.Kd1 Rf1 43.Re1 Re1) 37.Kg3 Nf5 (37...Nf1 38.Kg4 Rg2 39.Kf4 Rgf2 40.Ke5-+) 38.Kf4 (38.Kg4 Rf2 39.Rb7-+) 38...Rf2 39.Ke5 Ra5 40.Ke6 (40.d5 Ng3 41.Rf4 Rf4 42.Kf4 Nh5 43.Ke3-+) 40...Ng3 41.d5 (41.Re3 Rf6 42.Kd7 Rb6 43.Rg3 Rh5 44.Re3-+) 41...Rf6 42.Kd7 Rb6 43.Re8 Kh7 44.Kc7 Rf6 45.d6 Rd5 46.d7 Rf7 47.Kb7 Rdd7 48.Ka6 Nh5 49.Rb8 Rb7! 50.Rb7 (50.Rb7 Rb7 Combination) 50...Rb7 51.Kb7 g5 52.Kc6 Kg6 53.Kd6 Kf5 54.Ke7 Kg4 55.Kd6 Nf4 56.Kc5 (56.Kc7 h5 57.Kb7 h4 58.Kc6 h3 59.Kb7 Kf5 60.Kc8 h2 61.Kb7 h1Q 62.Kc7 Qc1 63.Kb6 Nd5 64.Kb5 Qc3 65.Ka6 Qc6 66.Ka5 Qb6 67.Ka4 Qb4) 56...h5 57.Kc6 (57.Kd4 h4 58.Kc5 h3 59.Kb6 h2 60.Kb5 Kf5 61.Kc5 h1Q 62.Kb6 Qc1 63.Ka6 Qc4 64.Kb7 Nd5 65.Ka8 Qc6 66.Kb8 Qc7 67.Ka8 Nb6) 57...h4 58.Kc5 (58.Kd6 h3 59.Kc5 h2 60.Kc6 h1Q 61.Kc5 Ne6 62.Kb5 Qe4 63.Kb6 Qb1 64.Kc6 Kf5 65.Kd6 Qb6 66.Kd7 Kf6 67.Ke8 Qb5) 58...h3 59.Kc6 (59.Kd4 h2 60.Kc3 h1Q 61.Kc4 Qd5 62.Kc3 Qc5 63.Kb2 Nd3 64.Kb3 Kf4 65.Ka2 Qc3 66.Kb1 Qb2) 59...h2 60.Kc5 h1Q 61.Kd6 (61.Kd4 Kf5 62.Kc3 Qc6 63.Kd2 Qc4 64.Ke3 Qd3 65.Kf2 Qe2 66.Kg3 Qg2) 61...Qe4 (61...Qd5 62.Kc7 Qe6 63.Kb7 Nd5 64.Ka8 Qa6 65.Kb8 Qb6 66.Kc8 Qc7) 62.Kc5 Kf5 63.Kd6 (63.Kb5 Qd4 64.Ka6 Qb4 65.Ka7 Ne6 66.Ka6 Nd8 67.Ka7 Qb7) 63...Qd5 (63...Ne6 64.Kd7 Qb7 65.Ke8 Qc8 66.Ke7 Qd8 67.Kf7 Qf8) 64.Kc7 Ne6 65.Kb6 Qc5 66.Kb7 (66.Ka6 Qb4 67.Ka7 Nc5 68.Ka8 Qb7) 66...Nc7 (66...Nd8 67.Ka6 Qb4 68.Ka7 Qb7) 67.Kc8 (67.Kb8 Qb6 68.Kc8 Ke6 69.Kd8 Qb8) 67...Qc6 (67...Nd5 68.Kd7 Qc7 69.Ke8 Qe7) 68.Kd8 (68.Kb8 Na6 69.Ka7 Nc5 70.Kb8 Qb7) 68...Nb5 (68...Ke6 69.Kc8 Kd6 70.Kd8 Ne6) 69.Ke7 Nd4 (69...Kg6 70.Kf8 Qe4 71.Kg8 Qe8) 70.Kf7 (70.Kd8 Qb7 71.Ke8 Ke6 72.Kd8 Qd7) 70...Qe6 (70...Qd7 71.Kf8 Ne6 72.Kg8 Qg7) 71.Kg7 (71.Kf8 Qd7 72.Kg8 Ne6 73.Kh8 Qg7) 71...Qf6 72.Kh7 (72.Kg8 Ne6 73.Kh7 Qg7) 72...Ne6 73.Kg8 Qg7 0–1. beatmeeasy (1905) – Djalmad5 (1870), lichess.org, 2020.

3.Nc3 c6 4.g3 Bf5 5.h3 h6 6.g4 Bh7 7.f3 Nbd7 8.f4 e6 9.a3 Be7 10.d4 0-0 11.h4?? (better is 11.e3-/+) 11...Ng4-+ 12.Bc1 (12.Qc1-+) 12...Bh4 13.Rh4 Qh4 14.Kd2 Nb6 15.Nf3 (15.Nd5 Nc4 16.Kc3-+) 15…Nc4 0–1. kevtheman – minstrel, gameknot.com, 2008. (=1.Nc3 d5 2.b4 Nf6 3.Bb2 c6)

3.Nc3 e6 4.a4 Bb4 5.Ba3 (5.Rb1 0-0-/+) 5...Bc3 6.dc3 Nbd7 7.e3 c5 8.c4 Qa5 9.Qd2 Qd2 10.Kd2 0-0 11.Nf3 Ne4 12.Kc1? (better is 12.Ke1=+) 12...Nf2-+ 13.Rg1 Ne4 14.Bd3 Nef6 15.e4?? (15.a5 e5 16.Bf5 dc4-+) 15...d4 (better is 15...de4 16.Bb2 Re8-+) 16.e5 Ng4 17.h3 Nh6 (17...Ne3 18.Kd2 f6 19.ef6 Rf6 20.Ke2-+) 18.g4 f6 (better is 18...f5 19.ef6 Rf6-/+) 19.Nd4? (19.g5 fg5 20.Ng5 Ne5 21.Bh7 Kh8 22.Bc5 Rd8=+) 19...Ne5 (better is 19...cd4!? 20.Bf8 Kf8 21.ef6 Nc5-+ (21...Nf6?! 22.g5=+)) 20.Nb5 Nd3 21.cd3 Bd7 (better is 21...b6-/+) 22.Bc5= Rfd8 23.Nc7 Rac8 24.Bd6?? (better is 24.Be7+=) 24...Ba4! 25.c5 (25.Ra4 Rd6) 25...Bc6 26.d4 (26.g5 Nf5 27.gf6 Rd7=+) 26...a6 (better is 26...Nf7!? 27.Ne6 Re8-/+ (27...Nd6?! 28.Nd8 Rd8 29.cd6=)) 27.Ne6= Rd7 28.Nc7? (better is 28.Kb2=) 28...Nf7-+ 29.d5 Nd6 (29...Rdc7?! 30.Bc7 Bd5 31.Bb6=+; 29...Rcc7?! 30.Bc7 Rd5 31.Bb6=+) 30.cd6 Rd6 31.dc6 Rc7 32.Kb2 Rcc6 33.Rac1 Rc1 34.Rc1 Rc6 35.Rd1 Kf7 36.Rd7 Kg6 37.Rb7 h6 38.h4 (38.Ra7 Re6-+) 38...Re6 (better is 38...Rc4!? 39.h5 Kh7 40.Rb6-+) 39.h5 Kg5 40.Rg7 Kh4 41.Rg6 Re4 (better is 41...Re2 42.Kb3 Rf2-/+) 42.Rh6 Rg4 43.Rf6 Kh5 44.Ra6 Kh4 45.Kc3 Kg3 46.Rf6 Kh4 47.Rh6 Kg3 48.Rh8 Kf4 49.Rf8 Kg3 50.Re8 Kh4 51.Re7 (51...Kg5 52.Re5 Kf4 53.Re8=) =. genijalac – maxmaxmax, Live Game Caissa's Web, 2004.

3.Nc3 Bf5 4.e3 Nc6 (4...e5 5.Nf3=+) 5.Bb5 Qd6 6.Nf3 (6.a3 a6 7.Bc6 Qc6=) 6...a6 (better 6...Qb4 7.Rb1 Qd6=+) 7.Bd3? (better 7.Bc6 Qc6 8.a3=) 7...Nb4?? (better 7...Bd3 8.cd3 Nb4-/+) 8.Bf5+- e6 9.Bd3 (9.Bh3 Be7+-) 9...0-0-0 (9...Nd3 10.cd3 Be7 11.e4+-) 10.0-0 d4 (10...Nd3 11.cd3 e5 12.Qb3+-) 11.Ne2 (11.Nd4 Nd3 12.cd3 c5+-) 11...de3 12.de3 Nd3 13.cd3 Qd3 14.Ne5 Qb5 15.Bd4 Rg8 (15...Bd6 16.Nc3 (16.Nf7?! Bh2 17.Kh2 Qh5 18.Kg1 Ng4+-) 16...Qa5 17.Nf7+-) 16.Nc3 (16.Nf7 Re8 17.Ng3 Qd5+-) 16...Qb4 (16...Qe8 17.Qf3+-) 17.Qc2 (17.Rb1 Qe7 18.Qb3 c5+-) 17...c5 (17...Qe7 18.Rab1 Qe8 19.Rfc1+-) 18.Ne4 (better 18.Rab1 Qa5 19.Nc4 Qc7+-) 18...Ne4 19.Qe4 (19.Nf7?! Rd4 20.ed4 Qd4+-) 19...cd4 20.Rac1 (20.Nf7 Rd7 21.Qh7 Rf7 22.Qg8 Rf6+-) 20...Kb8 21.Rc4 (better 21.Rb1!? f5 22.Qf3 (22.Rb4?! fe4 23.Nc6 Kc7 24.Nd8 Bb4 25.Ne6 Kd6 26.Nd4 Rc8=) 22...de3 23.Rb4 Bb4 24.Rb1 ef2 25.Kf1+-) 21...Qb5+= 22.Rb1 (22.Nf7 Qd5 23.Qd4 Qd4 24.ed4 Rd7+=) 22...Qd5?? (22...de3 23.Nf7 Rd2 24.fe3-/+) 23.Qd5?? (better 23.Nc6 Ka8 24.Rd4+-) 23...Rd5-/+ (worse 23...ed5 24.Rd4 Bc5 25.Rd3+- (worse 25.Nf7 Bd4 26.Nd8 Rd8 27.ed4 Rc8=+)) 24.Nf7 (24.ed4 f6 25.Ng4 Be7-/+) 24...de3-+ 25.fe3 Bc5 26.Kf1? (better 26.Kh1 Be3 27.Re4-+) 26...Rf8 27.Rf4 Be3 (better 27...g5 28.Rf2 Be3-+) 28.Rfb4?? (28.Rf3-+) 28...Rf7 29.Ke2 b5 (better 29...Re5 30.Kd3 Rd7 31.Kc2 Rd2 32.Kc3 Rc5 33.Rc4 Ra2 34.Rc5 Bc5-+) 30.Ke3 h5 (30...Kc7 31.Rc1 Kd6 32.Re4-+) 31.Rc1 (31.R4b2 Rc5-+) 31...g5 (31...Re5!? 32.Re4 Re4 33.Ke4-+) 32.Rc6 Kb7 (32...Re5!? 33.Re4 Re4 34.Ke4-+) 33.Re6-/+ g4 34.Rbe4 h4 (34...Rf1 35.Rh6 Rd7 36.Ke2-+ (36.Rh5?? Re1 37.Kf4 Rf7 38.Rf5 Rf1 39.Ke3 R7f5 40.Rg4 Re1 41.Kd4 Rh5-+)) 35.g3? (better 35.Rg4 Rd1 36.Ree4=) 35...Rf3-+ 36.Ke2 hg3 37.hg3 Rg3 38.Re7 (38.Rg6 Ra3-+) 38...Kb6 (38...Kc6!? 39.R7e6 Rd6 40.a4-+) 39.R4e6 Ka5 40.Ra7 Rg2 41.Ke3 g3 42.Raa6 Kb4 43.Re4 Kc3 (43...Kc5 44.Rg4-/+) 44.Rc6 (44.Rc6 Kb2 45.a4-+). Agiant – BLISSYMEISTER, lichess.org, 2018.

3.Nc3 g6 4.d4 Bg7 5.Nb5 0-0 6.g4? (better is 6.Nf3!?=+) 6…Bg4-+ 0–1. steveiefootball – jlsdonaghey (1780), net–chess.com, 2002.

3.c4 b6 4.e3 Bb7 5.d4 (5.Bf6 ef6 6.cd5 Qd5=) 5...dc4=+ 6.Nf3 b5 7.a4 (7.Nc3 c6-/+) 7...a6 8.Nc3 (8.ab5 ab5 9.Ra8 Ba8-/+) 8...c6-/+ 9.Be2 e6 10.0-0 (10.Na2 Bd6-/+) 10...Bb4-+ 11.Ne5 (11.Qc2 0-0-+) 11...Nbd7 12.Qc2 0-0 13.Bf3 Ne5 14.de5 Nd5 15.ab5 ab5 16.Rfd1 (16.Ra8 Ba8 17.Rb1 Qe7-+) 16...Bc3 (16...Qg5 17.Rdb1-+) 17.Bc3 Ra1 (17...c5 18.Rab1 b4 19.Bb2-+) 18.Ba1 c5 0–1. wlittle (2125) – petrpolacek (1835), net–chess.com, 2004.

3.c4 c6 4.cd5 cd5 (--> 1.b4 c6 2.c4 d5 3.cd5 cd5 4.Bb2 Nf6).

3.c4 g6 4.Nc3 c6 (4...dc4 5.Qa4 c6 6.b5=+) 5.e3 Bg7 6.Qb3 0-0 7.Nf3 Re8 (7...dc4 8.Bc4 b5 9.Be2=) 8.cd5 cd5 9.Bb5 Nc6 10.0-0 e6 (10...Bg4 11.Bc6 bc6 12.Ne5=) 11.Rac1 Bd7 12.Na4 Rc8 13.Nc5 Qc7? (13...Ne5 14.Be5 (14.Ne5?! Bb5 15.d3 Re7=) 14...Bb5 15.d3+/-) 14.Ne5! (14.Nd7?! Qd7 15.Qa4 Qd6+=) 14...Red8 (14...Ne5 15.Nd7 Decoy) 15.Bc6 Bc6 16.b5 (16.Nc6?! bc6 17.Qc2 Qe7+=) 16...Nd7?? (16...Be8 17.Ne6! Qc1 18.Rc1 Rc1 19.Bc1 fe6+-) 17.Ncd7 (17.Nc6?! bc6 18.Bg7 Kg7 19.bc6 Nc5 20.Rc5 Rb8 21.Qc3 Kg8+/-; 17.bc6?! Nc5 18.Rc5 b6 19.Nf7 bc5 20.Nd8 c4+/-; 17.Ned7?! Bd7 18.Bg7 Kg7 19.Qb2 Kg8 20.Ne6 fe6 21.Rc7 Rc7+-) 17...Rd7 18.bc6 (18.Nc6?! bc6 19.Rc6 Qb7+-) 18...bc6 19.Rc6 Qc6 20.Nc6 Rc6 (20...Bb2 21.Na7 Ra7 22.Qb2 Rac7+-) 21.Qb8 Bf8 22.Ba3 Kg7 (22...Rcd6 23.Bd6 Rd6 24.Qa7+-) 23.Qf8 (23.Bf8 Kg8 24.Bh6 Rc8 25.Qc8 Rd8 26.Qd8) 23...Kf6+- 24.Qh8 (24.Qh8 Kf5 25.f4+-) 1-0. Norkeliunas,Matas - La Barbera,Marcello, 29th EY Open U14, 2019.

3.d3 b5 4.Bf6 (4.a4 ba4 5.Nf3 Bd7=) 4...gf6 (4...ef6 5.Qd2-/+) 5.Nd2 (5.a4 ba4 6.e3 Bd7=) 5...Bg7 (5...e5 6.c3=+) 6.c3 (6.d4 a5=) 6...e5 (6...a5 7.ba5 c5 8.Rb1 Qa5 9.Qb3=+) 7.a4= Bd7 (7...ba4 8.Qa4 Bd7 9.Qb3=) 8.ab5+= Bb5 9.c4 (9.e3 Qd6+=) 9...dc4= 10.dc4 (< 10.Nc4 Nc6=+) 10...Bd7 11.e4 Bc6 (11...Bf8 12.c5=) 12.b5+= Bd7 (12...Bb7 13.c5+=) 13.Nb3 (13.c5 Bf8 14.Qc2 Be6+=) 13...c6 (13...Bf8 14.c5=) 14.Nf3 (14.Nc5 Qc7+=) 14...Be6 (14...f5 15.Nc5=) 15.Nfd2 (15.Nc5 Qd1 16.Kd1 cb5 17.cb5 Nd7 18.Ne6 fe6+/–) 15...cb5 (15...Qe7 16.c5 0-0 17.Qf3+=) 16.cb5+/– a6 (16...Qd6!?+/–) 17.ba6 Bb3 (17...Qb6!?+/–) 18.Qb3 (18.Bb5 Ke7 19.Qb3 Qd6+-) 18...0-0 19.a7 (better is 19.Qd5!? Ra7 20.Qd8 Rd8 21.Nb3+-) 19...Nc6+/– 20.Qb7 Qc8 21.Qc8 Rfc8+= 22.Bc4 Nd4 23.0-0 Rc7 24.Bd5 Raa7= 25.Ra7 Ra7 26.g3 Bh6 27.Nc4+= f5 28.Ne5 Bg7 29.Nd3 Ne2 30.Kg2+/– fe4 31.Be4 Re7 32.Bf3 Nd4 33.Rb1 h6 34.Rb8 Kh7 35.Bh5 Nc6 36.Nf4?? Nb8-+ 37.Nd5 Rd7 38.Nf4 Nc6 39.Bg4 Rd2 40.Nh3 Bd4 41.Bf5 Kg7 42.Be4 Ne5 43.Bf5 Kf6 44.g4 Nd3 45.Bd3 ½–½. 73DADDELDU37 – Master1, mySchach.de, 2005.

3.d3 b6 4.Nf3 Bb7 5.a3 c5 6.bc5 bc5 7.Nbd2 d4 8.c3 Nc6 9.cd4 Nd4 10.Nd4 cd4 11.Qa4 Nd7 12.Bd4 e5 13.Be5 Be7 (13...Rc8+-) 14.Bg7 Rg8 15.Bc3 Kf8 16.Qf4 Bg2 (16...Ke8+-) 17.Rg1 Bf1 (17...Qc8 18.Ne4 Be4 19.Qh6 Ke8 20.Rg8 Nf8+-) 18.Qh6 (18.Qh6 Rg7 19.Rg7+-; 18.Rf1?! Rg6+-) 1–0. Fritz 11 – mgrowe, internet, 2013.

3.d3 Nc6 4.b5 Bf5?? (better is 4...Nb8=) 5.bc6+- bc6 1–0. Del Val,Josefa (1795) – Colombani,Camillo, Lugano op, 2008.

3.d3 Nbd7 4.Nf3 g6 (4...e5!? 5.a3 a5+=) 5.e3 Bg7 6.Be2 0-0 7.0-0 Re8 8.Nbd2 e5 9.e4 de4 10.de4 b6 11.Bd3 Bb7 12.Re1 a5 13.a3 ab4 14.ab4 Qc8 15.Nc4 Now all is on e5 15...Nh5 16.g3 b5 17.Na5 c6 18.c4 bc4 19.Nc4 Bf6? (better is 19...Qc7+=) 20.Nd6+- Qc7 21.Ne8 Re8 22.Bc3 c5 23.Qb3 cb4 24.Bb4 Rc8 25.Ba5 Qd6?? (better is 25...Nc5 26.Bc7 Nb3+-) 26.Qb7 Rf8 27.Qd5 (better is 27.Bb5!? Nc5 28.Qc7 Qc7 29.Bc7 Nb3+-) 27...Qd5 28.ed5 Nc5 (28...e4 29.Be4 Ba1 30.Ra1+-) 29.Be4 Nb3 30.Ra3 Nc5 (30...Na5 31.Ra5 Bd8 32.Ra4+-) 31.Bb4 Rc8 32.Rc3 Be7 33.Rec1 Nf6 34.Nd2 Nfd7 35.Nb3 Nf6 36.f3 Nfd7 37.Bc5 Nc5 38.Nc5 Bc5 (38...f5 39.Bd3 Rc7+-) 39.Rc5 Rc5 40.Rc5 (40.Rc5 Kg7 41.d6 Kf6 42.Rd5 h6 43.d7 Ke7 44.d8Q Ke6 45.Qd6 mate) 1–0. Sapareva,Magdalena (1685) – Grabcheva,Natalia, 1st Dimitar Nikolov Mem, 2011.

3.d3 g6 4.a3 Bg7 5.h3 c6 (5...c5 6.Nf3-/+) 6.g4 Nbd7 7.e3 Nb6 8.g5 Nh5 9.Bg7 Ng7 10.a4 (10.Nf3 h6=+) 10...e5 (10...a5 11.Qd2-/+) 11.a5 Nd7 12.h4 f6 13.gf6 (13.Nf3!?=+) 13...Nf6 14.Qc1 (better 14.Nf3!? 0-0 15.Ne5-/+) 14...0-0-+ Black prepares the advance e4 15.Qb2 (15.a6 Ng4 16.f3 Nf5 17.fg4 Ng3-+) 15...Qd6?? (better 15...Ng4 16.Be2 Nf2-+) 16.Nf3 e4 17.Nd4?? (17.de4 Ne4 18.Nbd2 Nd2 19.Nd2 Bg4-+) 17...Nf5 (better 17...Ng4 18.Nc3 Rf2-+) 18.Be2-/+ Nd4 19.Qd4 Bg4 20.Nd2 Be2 21.Ke2 ed3 22.cd3 Rae8 (22...Nh5 23.Rag1=+) 23.a6 (better 23.h5!? Nh5 24.Rh5 gh5 25.Rg1 Kf7 26.Rg7 Ke6 27.Nb3+=) 23...b6-/+ 24.Rab1? (24.Rac1 Nh5 25.Ne4-+) 24...c5-+ 25.bc5 bc5 26.Qa4 d4 (26...Qe6!? 27.Rhf1 Ng4 28.e4-+) 27.e4 Qf4 (27...Ng4 28.f3 Qf4 29.fg4 Qg4 30.Ke1 Qg2-+) 28.Qc4 Kg7 (better 28...Kh8!? 29.Rhf1 Re5=+) 29.Rb7+= Kh6 (better 29...Kh8 30.f3 Qd6+=) 30.Qc5?? (30.f3 Qd6 31.Kd1+- (31.Ra7?! Ra8 32.Ra8 Ra8=)) 30...Ng4?? (better 30...Qg4 31.Kf1 Qd1 32.Kg2 Qd2-/+) 31.Qg5!+- (31.Qd4?! Qf2 32.Qf2 Rf2 33.Ke1 Rc8=) 31...Qg5 32.hg5 Kg5 33.Nf3 Rf3 34.Kf3 Rf8 (34...Ne5 35.Kg3 Nd3+-) 35.Kg3 h5 (35...Ne5 36.Rb5 Kf6 37.Rh7+-) 36.Rb5 (better 36.f4 Kh6 37.Ra7 g5 38.fg5 Kg5 39.Rg7 Kh6 40.Rg4 Ra8+-) 36...Kh6 (36...Kf6 37.Rc1 Ne5 38.f4 Nd3 39.Rd1 h4 40.Kf3 Nf4 41.Kf4 Ke6 42.Kg4+-) 37.f4 (better 37.f3 Ne3 38.Rb7 g5 39.Ra7 h4 40.Kf2 Rc8+-) 37...Ne3 (37...Rf6 38.Rc1 Ra6 39.Rc7+-) 38.Rb7 Ra8 (38...g5 39.f5 h4 40.Kf3+-) 39.Rhb1 (39.Rc1 Rf8+-) 39...Ng4 (39...g5 40.f5 h4 41.Kh3+-) 40.R1b4 Re8 (40...g5 41.Rd4 gf4 42.Kf4 Rf8 43.Kg3+-) 41.Rd4 Ne3 (41...Rf8 42.Ra7 Ne3 43.Rb7 h4 44.Kf3+-) 42.Rdd7 (42.Rdd7 Rh8 43.Ra7 Nf1 44.Kh3 Nh2 45.Kh2 h4 46.Kh3 g5 47.Kg4 Rd8 48.fg5 Kg6 49.Rg7) 1–0. beatmeeasy (1865) – mitko90 (1840), lichess.org, 2020.

3.d4 a6 4.e3 Nc6 5.b5 ab5 6.Bb5 Bd7 7.c4 e6 8.c5 e5 9.de5 Ne4 (9...Ne5 10.a4 Nc6 11.Nc3+=) 10.Nc3 Nc3 (10...Qh4 11.Qc2 Nb4 12.Qe2 Nf2 13.Nf3 Nbd3 14.Kf1+=) 11.Bc3+= Bc5 12.Nf3 (12.Qd5 Qe7+=) 12...Bg4 (12...Ra3 13.Qd2+=) 13.h3= Bf3 14.Qf3 0-0 15.a4 Qe7 (15...Bb4 16.Bb4 Nb4 17.0-0+=) 16.Qd5= Bb4 17.Bb4 Qb4 18.Kf1 (18.Qd2 Qd2 19.Kd2 Rfd8 20.Ke2 Ne5+=) 18...Nd8 (better is 18...Rfd8 19.Qa2 Ne5-/+) 19.g3?? (better is 19.Qd4 Qa5 20.Kg1+=) 19...c6-+ 20.Qc4 Qc4?? (better is 20...Qe7-+) 21.Bc4+= b6 (21...Re8!?+=) 22.Kg2 Re8 23.f4 (23.Rhb1 Rb8+-) 23...g6? (better is 23...Nb7!?+/–) 24.Rhb1+- Rb8 25.a5 b5 26.a6 Ne6 27.a7 Ra8 28.Be6 fe6 29.Ra6 Rec8 30.Rc1 (30.e4 Rc7 31.Rba1 c5+-) 30...c5 31.Rca1 Kf7 (31...Rc7+-) 32.R1a5 (better is 32.Rb6 Rc7 33.Rb5 Rca7 34.Ra7 Ra7 35.Rc5+-) 32...b4+/– 33.Rb5 Rc7 34.Rba5 (better is 34.Kf3!?+=) 34...b3 35.Rb6 Raa7 (better is 35...c4!? 36.Rb4 c3 37.Rb3 c2=) 36.Ra7+/– Ra7 37.Rb3 Ra2 38.Kf3 Ra7 39.Rc3 Rc7 40.e4 h6 ½–½. Schaefer,Sascha (1965) – Korn,Lothar (1700), remoteschach.de, 2009. (=1.d4 d5 2.b4 Nf6 3.Bb2)

3.d4 Bg4 4.f3 Bh5 5.e3 e6 6.a3 Bd6 7.c4 c6 8.c5 Bc7 9.g4 Ng4 (better is 9...Bg6!? 10.Nc3 Nfd7=+) 10.fg4+= Qh4 11.Kd2 Bg4 12.Nf3?? (better is 12.Qe1 Qe1 13.Ke1+=) 12...Qf2-+ 13.Be2 Bf3 14.Rf1 Qe2 15.Qe2 Be2 16.Ke2 Nd7 (16...Bh2 17.Nc3-+) 17.Nd2 (17.h3 g5-+) 17...Bh2 18.Rf3 Nf6 19.Rh1 Bc7 20.a4 Ne4 (20...Ke7 21.Rg1 Rag8 22.Rh3-+) 21.Rhf1?? (better is 21.Ne4 de4 22.Rfh3-+) 21...f5 22.b5 Nd2 23.Kd2 g5 24.bc6 bc6 25.Bc3 g4 26.R3f2 h5 27.a5 h4 28.Rh1 g3 29.Rff1 g2 (30.Rfg1 gh1R 31.Rh1 h3-+) 0–1. Branz – RAMBO (1800), internet, 2006.

3.e3 Na6 4.b5 (4.a3 c5=) 4...Nc5 5.a4 (5.Nf3 e6=) 5...c6 (5...e6 6.Nf3=+) 6.Nf3 Bg4 (6...e6 7.Bd4=+) 7.Be2= e6 8.d4 Nce4 9.h3 (9.0-0 a6=) 9...Bh5=+ 10.g4 (10.Nbd2 Bd6=+) 10...Bg6 11.a5 (11.Nbd2 Bd6-/+) 11...Bb4-/+ 12.c3 Ba5 (12...Bd6!?-/+) 13.Qa4= Bb6 (13...Bc7 14.bc6 bc6 15.Qc6 Nd7 16.Nbd2=) 14.bc6 bc6 15.Qc6 Nd7 (15...Kf8!?=) 16.Ne5+- Rc8 17.Qa4 f6?? (better 17...Rc7 18.Bb5 h5+-) 18.Nd7+- (18.Ng6?! hg6 19.c4 dc4 20.Bc4 Kf7+=) 18...Qd7 (18...Kf7+-) 19.Bb5 (19.Bb5 Qb5 20.Qb5 Kd8 21.Nd2+-) 1–0. GuestBBGH – GuestVFQS, freechess.org, 2020.

3.e3 e6 4.c4 Be7 5.b5 c6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 Be7).

3.e3 h6 4.Nf3 Qd6 5.c4 (5.a3 Nbd7=) 5...Qb4 (5...dc4 6.Qa4 Nc6 7.a3=) 6.Bf6 gf6 (6...ef6 7.cd5 Bd6 8.Nc3=) 7.cd5 Qb2 (7...Rg8 8.Nc3=) 8.Nc3+= Bg4? (better 8...a6+=) 9.Rb1+- Qa3 10.Rb7 Qa6 (10...Na6+-) 11.Ba6 (11.Ba6 Kd8 12.Bc4+-) 1–0. Maestro – Nibbi, internet, 2020.

3.Be5 Nbd7 4.d4 =+.

3.Be5 e6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.Be5).

3.f3 c6 4.e3 e5 5.Be5 Bb4 6.Bf6 Qf6 (6...gf6?! 7.Ne2=) 7.c3 Bd6 8.Ne2 Nd7 9.g3 (9.f4 0-0-/+) 9...Nb6 (9...Qf3!? 10.Rg1-+) 10.Nf4 g6 11.Bg2 Nc4 12.Qb3 0-0 13.0-0 Bf4 14.ef4 Nd6 (14...Bf5 15.Rd1-/+ (15.Qb7? Rfb8 16.Qa6 Rb5-+)) 15.d4 Nc4 16.Re1 b6 (16...c5 17.Qd1=+) 17.a4 (17.Na3 Ba6=) 17...a5 (17...Bf5 18.Na3 Na5 19.Qb4=+) 18.Qc2 (18.Bf1!? Ba6 19.Bc4 Bc4 20.Qb6=) 18...Bf5=+ 19.Qb3 (19.Qc1 Rae8=+) 19...Bb1 (19...c5 20.dc5 bc5 21.Na3-/+) 20.Rab1 (20.Qb1 Rab8=+) 20...Qd6 (20...Nd2!? 21.Qb6 Nb1 22.Qb1 Rfb8-/+) 21.Rbd1 Rfe8 22.Kf1?? (22.Bf1 Re1 23.Re1 Nd2=+) 22...f5 (better 22...Re1!? 23.Ke1 Qe7 24.Kf2 Qe3 25.Kf1-+) 23.Bh3? (23.Kf2 b5=+) 23...Kf7?? (23...Ne3 24.Kg1 Nd1 25.Rd1-+) 24.Re2? (better 24.Kf2=+) 24...Re2 25.Ke2 Re8 (25...Qe7!? 26.Kf2 Qe3 27.Kg2-+) 26.Kf2 Qe7 27.Bf1 Ne3 (better 27...Nd2 28.Qc2 Qe3 29.Kg2 Nf3-+) 28.Rd2?? (better 28.Rb1 Nf1 29.Rf1 Qe3 30.Kg2 Qd2 31.Rf2-/+) 28...Nf1-+ 29.Kf1 (29.Qd1 Nd2 30.Qd2-+) 29...Qe1 30.Kg2 Qd2 31.Kh3 Re2 32.Qb6 (32.Qd5 cd5 33.g4 Rh2 34.Kg3 Qf2) 32…Rh2 0–1. Atotheking (1735) – Alfred108 (1765), lichess.org, 2020.

3.Nf3 Na6 4.a3= c5 5.b5 Nc7 6.a4 (6.e3 Bf5=) 6...g6=+ 7.Bf6 (7.e3 Bg7=+) 7...ef6-/+ 8.e3 Bg7 9.d4 c4 (9...f5 10.Nc3-/+) 10.g3 Bg4 11.Bg2 Qd7 12.h3 (12.0-0 0-0=+) 12...Be6 13.Nc3 0-0 14.Ng1 Rfe8 15.Nge2 g5 16.g4 f5 (16...Rad8 17.Qd2-/+) 17.gf5 Bf5 18.h4 h6 19.hg5 hg5 20.Qd2 Bg6 21.0-0-0 Qd6 22.Rdg1 Rad8 (22...b6 23.Ng3=+) 23.Bf3 Qf6 (23...Qa3 24.Kb1 Qe7 25.Bh5=) 24.Bh5= Ne6 25.Bg6 fg6 26.Rg2 Qf3 27.Rhg1 (27.Rgh2 a6=) 27...Bf6 (27...Kf7 28.Rg3 Qf6 29.f4=) 28.Qd1 Kg7 29.Rg3 Qf5 30.Qf1 Rf8 (30...Be7 31.Qg2 Rf8 32.f4=) 31.Qg2 (31.Rh1 Kg8=) 31...Be7= 32.f4 a6 (32...Bd6 33.Kb1 Bc7 34.Rh3+=) 33.Rh3 (33.Kb1 ab5 34.ab5 Bb4=) 33...gf4=+ 34.ef4 Nf4 (better 34...ab5!? 35.ab5 Bf6=) 35.Nf4+= Qf4 36.Kb2 g5 (36...Qf5!?+=) 37.Rgh1+- Bf6 (better 37...Rh8 38.Rh8 Rh8 39.Rh8 Kh8 40.Qd5 ab5 41.Nb5 g4 42.Qb7 Bg5+=) 38.Rh7+- Kg8 39.Qh3 Bd4 40.Qe6 (40.Rh8 Kf7 41.Rf8 Kf8 42.Rf1+-) 40...Rf7-/+ 41.Qg6 Kf8 42.Qh6? (better 42.Rf7!? Qf7 43.Qg5-/+) 42...Ke7-+ 43.Re1 (43.Qg6 Rdf8 44.Re1 Kd8 45.Rf7 Rf7-+ (45...Qf7?! 46.Qd6 Kc8 47.Re7 Bc3 48.Ka2 Qe7 49.Qe7=)) 43...Be5 44.Rf7 (44.ba6 ba6 45.Rg7 Rg7 46.Qg7 Ke6-+) 44...Kf7 45.Kb1?? (45.Qh5 Kg7 46.Rf1-+) 45...Bc3 (better 45...Rh8 46.Qb6 Bc3 47.Qb7 Kg6 48.Qc6 Qf6 49.Qf6 Kf6 50.Rf1 Ke6 51.ba6-+) 46.Qe6 Kg7 47.Qe7 Kg6 48.Qd8 Be1 49.Qe8 Qf7 50.Qe1 ab5 51.ab5 Qd7 52.Qa5 (52.Kc1 g4 (52...Qb5?! 53.Qe6 Kg7 54.Qe7 Kg8 55.Qg5 Kf7 56.Qe5-+) 53.Qe5 Qf5 (53...Qb5?! 54.Qe6 Kg7 55.Qg4 Kf6 56.Qf4 Ke6 57.c3-+) 54.Qe8 Kg5 55.Qe7 Kh5-+) 52...g4 53.Qb6 (53.Ka2 d4 54.Qb6 Kf5 55.Qc5 Ke4-+) 53...Kf5 (better 53...Kh5 54.Qe3 Qb5 55.Kc1-+) 54.Qc5 (54.Qf2 Kg5 55.Qe3 Kh5 56.Qe5 Kg6 57.Kc1-+) 54...g3 55.b6 (55.Kb2 Kg4 56.Qd4 Kh3-+) 55...Ke4 56.Qc7 (56.Qg1 Qg4 57.Qe1 Kf5 58.Qf1 Qf4 59.Qh1-+) 56...Qf5 (56...Qg4 57.Qe7 Kf3 58.Qf7 Ke3 59.Qd5 g2 60.Qe5 Qe4-+) 57.Qb7?? (better 57.Qg3 Qf1 58.Kb2 Qf6 59.Ka2-/+) 57…g2-+ (57...g2 58.Qe7 Kf3-+) 0–1. Gurgenidze,Bukhuti (2180) – Khotenashvili,Bela (2300), 1st Alexandr Buslaev Mem, Tbilisi GEO, 2007. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Na6)

3.Nf3 g6 4.Bf6 (4.e3 a5=) 4...ef6 5.a3 Bg7 (5...a5 6.b5=) 6.e3 0-0 7.c4 (7.d4 a5 8.b5 f5=) 7...Re8 8.cd5 f5 (8...Qd5 9.Nc3 Qd8 10.d4=) 9.Nc3+= Nd7 10.Bb5 Qf6 (10...f4 11.0-0+=) 11.0-0 g5 (11...f4 12.e4+/–) 12.Rc1 (12.d4 f4 13.Qa4 Re7+/–) 12...c6 (12...g4 13.Nd4+/–) 13.Ba4 g4 (better is 13...a5!?+/–) 14.Nd4+- Ne5 (14...b5 15.Bc2 Nb8 16.dc6 Nc6 17.Ndb5+-) 15.dc6 bc6 16.Nc6!! Qh6 17.Ne5 Be5 18.g3 Bb7? 19.f4! gf3 20.Rf3 Bf3+/– 21.Qf3 Bc3 22.Be8+- Bd2 23.Bf7 Kg7 24.Rc7 Be3 25.Kg2 Rd8 26.Bd5 Kh8 27.Qf5 Bd4 28.h4 Rf8 29.Rh7! (29...Qh7 30.Qf8 Qg8 31.Qg8) 1–0. Bulcourf,Carlos (2210) – Petrungaro,Omar, Traffic op Buenos Aires, 1992.

3.f4 b6 4.Nf3= Bb7 (4...e6 5.b5=) 5.Nc3 (5.e3 e6=) 5...e6=+ 6.a3 a5 7.b5 (7.e3 Nbd7=+) 7...Bd6=+ 8.e3 0-0 (8...Nbd7 9.d4=) 9.Bd3 (9.Be2=+) 9...c5 (9...Nbd7!?=+) 10.bc6+= Nc6 11.Nb5 (11.0-0 h6=) 11...Be7 (11...Ne4 12.0-0=) 12.0-0 a4 (12...Ne4 13.Qe2=) 13.Ne5 (13.Rc1 Rc8+=) 13...Na5 (13...Ne4 14.Qg4 Ne5 15.fe5=) 14.Nd4 (14.f5 ef5 15.Nd4 Bc8 16.Rf5 Bf5 17.Nf5 Rc8+-) 14...Rc8+= 15.Qf3 Ne4 16.Qg4 (better 16.Qh3+-) 16...Nd2?? (16...Bd6 17.Be4 de4+-) 17.Ne6!+- fe6 (17...fe6 18.Qe6) 18.Qe6 Kh8 (18...Rf7 19.Qf7 Kh8 20.Ng6 hg6 21.Qg7) 19.Qh6!! gh6 (19...gh6 20.Nf7) 20.Nf7 Kg8 21.Nh6 1–0. Leonco – An200, internet corr, 2018.

3.f4 c6 4.Nf3 (4.a3 Bg4=) 4...e6 (4...Qd6 5.e3 Qb4 6.Bd4=+) 5.a3 Bd6 (5...a5 6.ba5 Ra5 7.e3=+) 6.e3= 0-0 7.Be2 Nbd7 (7...a5 8.b5=) 8.0-0 e5?? (better 8...Qc7=) 9.fe5+- (9.Ne5?! Re8 10.Nd7 Bd7+=) 9...Ne5 10.Ne5 Be6 (10...Qe7 11.Nf3+-) 11.Bd3 (11.Nf3 Qe7+-) 11...Qc7 (11...Re8 12.Nf3+-) 12.Rf6! Be5 (12...gf6 13.Qh5 Combination) 13.Qh5 (13.Bh7 Kh7 14.Qh5 Kg8 15.Be5+- (15.Qe5?! Qe5 16.Be5 gf6 17.Bf6 a5=)) 13...g6 (13...Bh2 14.Kh1 h6 15.Re6 fe6 16.Qh2 Qh2 17.Kh2 a6+-) 14.Be5 Qd7 (14...gh5 15.Bc7 h4+-) 15.Bg6! hg6 (15...fg6 16.Rg6; 15...hg6 16.Rg6) 16.Rg6! fg6 (16...fg6 17.Qg6) 17.Qg6 Qg7 18.Qg7 1–0. Leonco – Nikki, internet corr, 2018.

3.f4 Ne4 4.d3 Nd6 5.Nf3 Nc6 6.a3 Bg4 7.e3 e5 (7...Nf5!? 8.b5 Nb8= (< 8...Ne3 9.Qe2+/–)) 8.fe5+= Bf3? (better is 8...Nf5 9.Qd2 Bf3 10.gf3 d4 11.ed4 Ncd4=) 9.Qf3+- (9.gf3?! Nf5 10.Qd2 d4 11.ed4 Nfd4=) 9...Nb5 (9...Nc8 10.b5 Na5 11.Bc3+-) 10.a4 (10.d4 a6+-) 10...Bb4 (better is 10...Qh4 11.Qf2 Qb4 12.c3 Qb3 13.ab5 Ne5+-) 11.Kd1 0-0 (11...Na3 12.Na3 (12.Ra3?! Ba3 13.Na3 0-0+-) 12...0-0 13.Be2+-) 12.ab5 Ne7 13.Qg4 Bc5 14.e6 Ng6 15.d4 Bd6 16.e4 de4 17.ef7 Rf7 18.Qe4 Kh8 19.Bc4 Rf4 20.Qb7 Bc5 21.c3 Bb6 22.g3 Rf2 23.Nd2 c5 24.bc6 Ne5 25.Bb5 Rb8 26.c7 Bc7+/– 27.Qa6 Bb6?? 28.Ke1 Rf6 29.Qa2 Ng4 30.Ne4 Qe7+= 31.Qd5 Re6 32.Kd2 Rd8? 33.Nd6?? Red6= 34.Qf3 Ne5?? 35.Qe3 Nc6? 36.Rhe1 Qe3? 37.Ke3 Na5 38.h4 h6 39.Bd3 Nb3 40.Ra4?? Re6 41.Be4 Rde8?? 42.Kd3+- Na5 43.c4 (43...Nb3 44.Ra2=; 43.Bc1!? Nb7 44.Re3 Nd6+-) 1–0. Bonetti,Shane – reptile, ICC, 2002.

3.f4 e5 4.fe5 Ne4 5.Nf3 =+.

3.f4 Ng8 4.Nf3 Bg4 5.e3 e6 6.a3 Bd6?? (6...Nf6 7.Be2=) 7.d3 (better is 7.Bg7 e5 8.Bh8+-) 7...f6 (7...Nf6 8.c4=) 8.Be2 Nd7 9.Nbd2 (9.Nd4 Be2 10.Qe2 Qe7+=) 9...Qe7 (9...c5 10.bc5 Nc5 11.0-0=) 10.h3 Bh5 11.g4 (11.c4 c5 12.bc5 Nc5+=) 11...Bg6= 12.c4 e5 (12...c5 13.bc5 Nc5 14.Qc2=) 13.f5 (13.c5 Bc5 14.bc5 ef4+/–) 13...Bf7 (13...e4!? 14.de4 de4=) 14.c5+/– Bc5 (14...Nc5 15.bc5 Bc5 16.d4 ed4 17.ed4+/–) 15.bc5+- Nc5 16.Qc2 0-0-0 17.Rc1 b6 18.d4 Ne4? 19.Ba6 Kd7 20.Qc7 Ke8+- 21.de5 Qc7 22.Rc7 h5 23.e6 Be6 24.fe6 Nd6 25.Rg7 Ne7 26.Bf6 Ndc8 27.Bb5 Kf8 28.Rf7 Kg8 29.gh5 Rh7 30.Rg1 Ng6 31.Rg6 Rg7 32.Rgg7 Kh8 33.Rg6 1–0. bigman (2040) – taff, net–chess.com, 2001.

3.Bf6 e5 4.Bd8 Kd8 5.d3 Bd6 (5...Bb4 6.c3 Be7 7.Nf3+-) 6.c3 Bg4 7.e3 (better 7.d4 e4 8.Qd2+-) 7...Bd1 8.Kd1 Nc6 (8...c6 9.d4+-) 9.Be2 d4 (9...f5 10.Nd2+-) 10.Nf3 dc3 11.Nc3 (11.b5 c2 12.Kc2 Nb4 13.Kb3 a6+-) 11...Re8?! (11...Bb4 12.Nd5 Bd6 13.Ng5+-) 12.Ne4 (better 12.b5 Na5+-) 12...Bb4 13.Neg5 Rf8 (13...f6 14.Ne4+- (worse 14.Nh7 Rh8+/-)) 14.Rb1 (14.Nh7!? Re8+-) 14...h6 15.Ne4 Ba5 (15...f5 16.Ned2 a5 17.Nc4+-) 16.d4 (better 16.Rb5 Re8+-) 16...f5 (16...ed4 17.Nd4 Nd4 18.ed4 Bb6+-) 17.Nc5 ed4 18.Nb7 Kc8 19.Na5 Na5 20.Nd4 Rd8 (20...g6 21.g4 Rb8 22.Kc2+-) 21.Bd3 (21.Kc2 Rd5+-) 21...c5 (21...g6 22.Ke2 Rd6 23.Rhc1+-) 22.Bf5 (better 22.Rc1!? Nb7+-) 22...Kc7 23.Be4 (23.Rb5 cd4 24.Ra5 de3 25.Ke2 ef2+-) 23...cd4 (23...Rab8 24.Rb8 Kb8 25.Ke2 cd4 26.Rb1 Kc7 27.Rb5+-) 24.Ba8 de3 25.Ke2 Ra8 26.fe3 Re8 27.Rhc1 Kd6 28.Rb5 Nc6 29.Rd1 Kc7 30.Rc5 Kb6 31.Rdc1 Nd4 (31...Re6 32.R5c4+-) 32.Kd3 Ne6 33.Rc6 Kb7 34.Rd6 Ng5 (34...Re7 35.a4+-) 35.Rd7 Kb6 36.Rg7 Re5 (36...Rd8 37.Ke2+-) 37.Ke2 (37.Rg6 Re6 38.Re6 Ne6+-) 37...Rb5 (37...Ra5 38.Rc2 h5 39.Rg6 Kb7 40.Rh6+-) 38.Rg6 Ka5 (38...Kb7 39.Rf1 Rb6 40.Rb6 ab6 41.Kd3+-) 39.Rh6 Rb2 40.Kf1 (better 40.Kd3!? Nf7 41.Rh5 Ka6 42.Rc6 Rb6 43.Rb6 ab6+-) 40...Ne4 41.Rh5 Ka4 (41...Kb6 42.a4+-) 42.Rf5 (better 42.Rc4 Rb4 43.Rb4 Kb4+-) 42...Nd2 (42...Rb4 43.g4+-) 43.Ke1 Ne4 (43...Nb1 44.Rc4 Rb4 45.Rc7+-) 44.Rf4 (better 44.Rc4!? Rb4 45.Rb4 Kb4+-) 44...Ka3 (44...Rb4 45.Ke2 a5 46.g4+-) 45.Re4 Ra2 (45...Rg2 46.Rc7 a6 47.Ra7 Ka2 48.Ra6 Kb3 49.h4+-) 46.Rd1 (better 46.Rc3 Kb2 47.Rec4+-) 46...Rf2 (46...Rg2 47.Rd3 Kb2 48.Rd2 Kb3 49.Rg2 Kc3+-) 47.Kf2 a5 (47...a6 48.Rd3 Ka2 49.Ra4 Kb1 50.Rb4 Ka2 51.Rd5 Ka3 52.Rb8 Ka4 53.Rd1 a5 54.Ra1) 48.Kf3 (48.Rb1 Ka2 49.Rb5 Ka3 50.h4 a4 51.g4 Ka2 52.Ra4) 48...a4 (48...Kb2 49.g4 Kc2 50.Ke2 Kb2 51.Rd5 a4 52.Rb5 Ka3 53.h4 Ka2 54.Ra4) 49.Ra4! Kb2 (49...Ka4 50.Rd4 Combination) 50.e4 (50.Rb4 Kc3 51.Rdd4 Kc2 52.Ke2 Kc3 53.Rdc4) 50...Kc2 (50...Kc3 51.Rc1 Kb2 52.Rc8 Kb3 53.Ra7 Kb4 54.Rb7 Ka4 55.Ra8) 51.Ke2 Kc3 52.e5 (52.Rdd4 Kb3 53.Kd2 Kb2 54.Rdb4) 52...Kc2 (52...Kb2 53.Rb4 Ka3 54.Rb8 Ka2 55.e6 Ka3 56.Ra1) 53.e6 (53.Rdd4 Kb3 54.Kd2 Kb2 55.Rdb4) 53...Kc3 54.e7 (54.Rdd4 Kb3 55.Kd2 Kb2 56.Rdb4) 54...Kc2 (54...Kb3 55.e8Q Kc2 56.Qb5 Kc3 57.Rc4) 55.e8Q Kc3 56.Qc6 (56.Qb8 Kc2 57.Rc4) 56...Kb2 57.Rb4 Ka2 (57...Ka3 58.Qa4) 58.Qc2 (58.Qa4) 58...Ka3 59.Qb3 1-0. amirkhafan (2185) - Nice_To_Mate_You (2290), Rated Bullet game, lichess.org, 2014.

3.Bf6 Bg4?? 4.Bb2+- e6 5.b5 c6 6.e3?? (better 6.h3 Bh5 7.g4+-) 6...Bd1-+ 7.Kd1 cb5 8.Bb5 Nc6 9.Bc6 bc6 10.Nc3 Bb4 11.Nce2 Qe7 12.Bg7 Rg8 13.Bc3 (13.Be5 Rg2 14.Nf3 a6-+) 13...Qg5 (better 13...Rg2 14.f4-+) 14.g3 Bc3 15.Nc3 Qe5 (15...Qh5 16.Ke1-+) 16.Nge2 d4! 17.Nd4 (17.Nd4 c5 Decoy; 17.ed4 Qf5 Combination) 17...0-0-0 (better 17...Qh5 18.Ke1 e5-/+) 18.Nc6?? (better 18.Rb1 Kc7 19.Rb3-/+) 18...Qd5 (better 18...Qc3! 19.Na7 Kb7 20.Rb1 Ka7-+) 19.Na7 (better 19.Nd5 ed5 20.Nd8 Rd8+-) 19...Kb7 20.Nd5 Rd5 21.Nb5! Rgd8 (21...Rb5 22.c4 Passed pawn) 22.d3 (better 22.Nd4 e5 23.Nb3 e4+-) 22...Rb5 23.a4 Ra5 24.Kd2 Ka6 25.Rhb1 Ra8 26.Rb5! Rb5 (26...Rd8 27.c4 h6+-) 27.ab5 Kb5 (27...Kb7 28.Ra8 Ka8 29.c4+-) 28.Ra8 Kc5 29.Rh8 Kd5 30.Rh7 Ke5 31.Rf7 Kd6 32.Ra7 Ke5 33.h4 Kf5 34.Ra5 (better 34.c4 e5+-) 34...Kg4 35.Ra4 (35.h5 Kh3 36.h6 e5 37.h7 Kg2 38.Ke2 e4 39.de4 Kg1 40.Kf3 Kh2 41.h8Q Kg1 42.Ra1) 35...Kf3 36.Re4 Kf2 37.Rf4 Kg3 (37...Kg3 38.h5 e5 39.Re4 Kf2 40.h6 Kg2 41.h7 Kf2 42.h8Q Kf3 43.Qh5 Kf2 44.Rg4 e4 45.Qf5) 0–1. atif_zubair – Ultradno, lichess.org, 2019.

3.g3 a5 4.b5 Nbd7 (4...Bf5 5.Nf3=) 5.Bg2 (5.Nf3 a4=+) 5...e5=+ 6.Nf3 e4 (6...Bd6 7.0-0=+) 7.Nd4 c5 8.bc6 bc6 9.a4 (9.0-0 Qb6 10.Qc1 Rb8-+) 9...Qb6 (9...Ne5 10.Nc3=+) 10.Ra2 (10.Nb3 Be7=+) 10...Bc5-/+ 11.c3 (11.e3 Rb8-/+) 11...Ne5 12.0-0 0-0 (12...Rb8 13.Ba3 Bd4 14.Rb2 Bf2 15.Rf2-/+) 13.Ba3=+ Ba3 14.Na3 (14.Ra3 c5 15.Rb3 Qd8=+) 14...Bg4 15.h3 Bh5 16.Nac2 (16.g4 Bg6=+) 16...Bg6 (16...c5 17.Nb5=+) 17.Ne1 (17.Ra3 Qc7=+) 17...Nh5 (17...Rab8 18.Ra3-/+) 18.d3 (18.Kh2 c5 19.Nb5 Nf6=+) 18...f5 (18...Rab8 19.Rc2=+) 19.de4 (19.Ra3 c5 20.Qb3 Qb3 21.Nb3 c4=+) 19...fe4 20.e3 (20.Nec2 Rab8=+) 20...c5 (20...Rab8 21.Ra3-/+) 21.Qb3 Qd6 22.Nb5 Qe7 23.Ra1 Nc4 24.Rd1 Bf7 25.Nc2 Qe5 26.Qb1 Rad8 27.Kh2 Be6 28.Qc1 Rf7 29.Nca3 Na3 30.Na3 Rdf8 31.Qd2 Nf6 32.c4 h5?? 33.cd5 Bd5 34.Qa5+= Be6 35.Rc1 Qb2 36.Qc3 Qc3+= 37.Rc3 Nd5 38.Rcc1 Nb4? 39.Kg1 Nd3+= 40.Rc2 Bb3 41.Rd2 (White gets the initiative) 41...Re7 42.Nb1 Bf7 43.Nc3+/– Bg6 44.a5 c4 45.Ra1 Ra8 46.Ra4 Nc5 47.Rc4 Ra5 48.Rd5 Ra1 49.Kh2 Nd3 50.Ne4 Be4 51.Be4 Nf2 52.Rc8 (52...Kf7 53.Rf5 Ke6 54.Rf2+-) 1–0. Olsen,Peter Erik – Nilsson, Hillerod, 1992.

3.g3 a6 4.Bg2 c6 5.d3 e6 6.Nd2 (6.Qd2 c5=+) 6...Be7 (6...Bb4!? 7.Ngf3 Nbd7-/+) 7.a3=+ 0-0 8.c4 dc4 (8...a5 9.b5=+) 9.Nc4= b5 10.Na5 Bd7 (10...Nd5!? 11.Nb3 a5=) 11.Nf3+= Nd5 12.0-0 Bf6 13.d4 Qc8 14.e4 Ne7?? (better 14...Nc7+-) 15.e5+- Be5 (15...Nd5 16.ef6 Nf6 17.Rc1+-) 16.Ne5 (16.de5 Nf5+-) 16...Nf5 (16...Nd5 17.Rc1+-) 17.Nd7 (17.Rc1 Ne7+-) 17...Nd7 (17...Qd7 18.Rc1 Rc8 19.Qg4+-) 18.Bc6 Rb8 (18...Ra7 19.Rc1 Rc7 20.d5+-) 19.Qg4 (better 19.d5!? ed5 20.Rc1 Nb6+-) 19...Nf6 20.Qf3 White plans d5 20...Rb6 21.Rac1 Qd8 22.Rfd1 White intends d5 (22.d5 Nd5 23.Bd5 Qd5 24.Qd5 ed5+-) 22...Ne7 (22...Nd5 23.Bd5 Qd5 24.Qd5 ed5 25.Re1+-) 23.d5 ed5 (23...Nfd5 24.Bd4+-) 24.Bf6 gf6 25.Bd5 Nd5 26.Rd5 Qe7 27.Rcd1 (27.Nc6 Qe6+-) 27...Re6 (27...Re8 28.Nb3+-) 28.Rh5 (better 28.Rd7 Qe8 29.Kg2+-) 28...Kh8 (28...Re8 29.Kg2 Re1 30.Re1 Qe1 31.Rh6+-) 29.Qd3 (29.Qf5 Re1 30.Re1 Qe1 31.Kg2 Qe4 32.Qe4 f5 33.Qf5 Kg7 34.Rg5 Kh6 35.Qf6) 29...f5+- 30.Qf5 f6 (30...h6 31.Nb3+-) 31.Rh7! Qh7 32.Qe6 Qf7 33.Qf7 Rf7 34.Nc6 1–0. JUANKARODA (1795) – Raffferty (1750), lichess.org, 2020.

3.g3 b6 4.Bg2 Bb7 5.a4 e6 6.b5 Bc5 7.e3 0-0 8.c4 d4?? (better 8...c6=+) 9.Bb7+- de3 10.de3 (10.Ba8?! ef2 11.Kf1 fg1B 12.Rg1 Qd3 13.Kg2 Bg1 14.Bf6 Nd7+-) 10...Nbd7 11.Ba8 Qa8 12.Ne2 (better 12.Qf3 Ne4 13.Nh3 Bb4 14.Ke2+-) 12...Qh1-+ 13.Kd2 Ne4 14.Kc1 Qd1 15.Kd1 Nf2 16.Ke1?? (16.Kc2 Be3 17.a5 Ng4-+) 16...Ne4 (better 16...Nd3 17.Kd2 Nb2-+) 17.Nd2? (17.Bd4 Bb4 18.Bc3 Nc3 19.Nbc3 Ne5-+) 17...Nd2?? (better 17...Bb4 18.Bc1 Ne5-+) 18.Kd2-/+ Rd8 19.Re1 (better 19.Nd4!? Ne5 20.Kc3-/+) 19...Ne5 20.Kc2 Bb4 (20...Nc4 21.Nd4-+) 21.Nc3 Nf3 (21...Nc4!? 22.Re2-+) 22.Re2-/+ e5 (22...f5 23.Na2 Bd6 24.Nc1-/+) 23.Kb3 (23.Nd5!? Bd6 24.Kd3-/+) 23...Bc3 24.Bc3 e4 25.a5 Rd3 26.ab6 ab6 27.Kc2 f6 28.h3 Kf7 29.h4 Ke6 30.Bb4 h5 31.c5 Ne5 32.cb6 cb6 33.Bf8 g6 34.Bg7 (34.Bh6 Rd5-+) 34...Ng4 35.Bf8 Re3 36.Re3 (36.Kd2 Rd3 37.Ke1 Kf5-+) 36...Ne3 37.Kd2 Nd5 (37...Nf1!? 38.Kd1 Ng3 39.Bb4-+) 38.Ke2 f5 (38...Nc3 39.Ke3-+) 39.Kd2 (39.Bg7 Kd7-+) 39...f4 40.gf4 Nf4 (better 40...Kf5 41.Ke2-+) 41.Ke3 Kf5 42.Bd6 Nd5 (42...Ng2!? 43.Kf2 Nh4 44.Bc5-+) 43.Kd4 Nf6 (better 43...Ke6!? 44.Bg3 e3 45.Ke4-+) 44.Bc7 Nd7 45.Kd5?! (45.Bd6 Nc5! 46.Ke3-+) 45...e3 46.Bg3 e2 47.Kd6 (47.Kd4 Kg4 48.Be1-+) 47...Nf6 48.Kc6 Ne4 (better 48...g5 49.Kb6 Kg4 50.hg5 Kg3 51.gf6-+) 49.Be1 Nf6 (better 49...g5 50.hg5 Kg5 51.Kb6-+) 50.Kb6?? (50.Bg3 g5 51.Kb6-+) 50...Nd5 (50...g5 51.Ka5 gh4 52.Bh4 Kg4-+) 51.Kc5 Ke4 52.Kc6 Ke5 53.b6 (53.Kc5 Ke6 54.Kd4 Ne7=+) 53...Nb6 54.Kb6 Kf5 (54...g5 55.Kc5 Kf5=) 55.Kc5= g5 56.hg5 (56.Kd4!?=) 56...Kg5-/+ 57.Kd4 h4 58.Ke3 Kg4 (58...h3 59.Kf3 Kf5=) 59.Ke2 h3 60.Kf2 Kh4 61.Kg1 Kg4 62.Kh2 Kf3 63.Bg3 Kg4 64.Be1 Kf3 65.Kh3 ½–½. bazilishek (1680) – Tiger1990 (1705), lichess.org, 2020.

3.g3 c6 4.Bg2 Bf5 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6 4.g3 Bf5 5.Bg2).

3.g3 Qd6 4.a3 e5 5.Bg2 Be7 6.Nc3 0-0 7.Nf3 e4 (7...c6 8.0-0=+) 8.Nd4=+ a6 (8...Nc6 9.Nc6 Qc6 10.0-0=+) 9.d3= c5 (9...Qe5!? 10.de4 de4 11.Ne4 Ne4=+) 10.bc5+= Qe5 11.Nb3 e3 (better is 11...Qe6!?+=) 12.Nd5+- ef2 13.Kf1 Qb2 14.Ne7 Kh8 15.Nc8 (15.Kf2? Ng4 16.Kg1 Qf6 17.Ng6 Qg6-+) 15...Ng4 (15...Rc8 16.Qb1 (16.Kf2?! Ng4 17.Kg1 Nc6+-) 16...Qe5 17.Bb7+-) 16.Qc1 Qc1 17.Rc1 Rc8 18.Bb7 Nc6 19.Ba8 Ra8 20.h3 Ne3 21.Kf2 Re8 22.g4 (22.c3 Nb8+-) 22...Nd5 23.e4 Nc3 24.Rhf1 g5 25.Kg2 Kg7 26.Rf5 h6 27.Rcf1 Re7 28.Rf6 Ne5 29.Ra6 Ne2 30.a4 Nf4 31.Kh2 h5 32.gh5 Nh5 33.c6 g4 34.hg4 Ng4 35.Kh3 Ne3 36.Rg1 Kh7 37.Nd4 f6 38.Rb6 Rc7 39.Rb7 1–0. grimstad – patman007, ChessWorld.net, 2005.

3.g3 Nbd7 4.Bg2 c6 5.d3 e5-/+ 6.Nd2 (6.a3!?-/+) 6...Bb4 7.Ngf3 Bd2 (7...Bd6 8.0-0-/+) 8.Qd2-/+ d4 (8...Qe7 9.0-0-/+) 9.Ba3 (9.c3 c5=+) 9...c5-/+ 10.c3 0-0 (10...e4 11.Nh4 dc3 12.Qc3 ed3 13.ed3 Qe7 14.Kd2=+) 11.cd4=+ ed4 12.Nd4 (better 12.Rc1!? Qb6 13.0-0=+) 12...cd4-+ 13.Bf8 Qf8 14.0-0 Ne5 (14...Qd6 15.Rac1-/+) 15.a3 (15.Qf4 Qd6-/+) 15...Rb8 (15...Nc6 16.Rfc1-/+) 16.Qf4 Nc6?? (better 16...Qd6-/+) 17.Bc6+- bc6? (better 17...Bg4 18.Rfb1 b6+-) 18.Qb8 Bh3 (18...a6 19.Rac1 c5 20.e3+-) 19.Qf8 (19.Rfb1!? c5+-) 19...Kf8 20.Rfc1 1–0. JUANKARODA (1785) – Jagdish17 (1800), lichess.org, 2020.

3.g4 h6 4.h3=+ Nbd7 5.Bg2 (5.Nf3 e5 6.Ne5 Bb4=+) 5...e5 6.c4 (6.a3 c5=+) 6...d4 (6...dc4 7.a3-/+) 7.e3 (7.c5 a5 8.a3 Be7=+) 7...Bb4 (7...de3 8.fe3 Bb4 9.Ne2-/+) 8.Qa4 (8.ed4 ed4 9.Qe2 Be7 10.Bd4 0-0=+) 8...a5 (8...Qe7 9.ed4 ed4 10.Kd1-/+) 9.a3 (9.ed4 ed4 10.Bd4 0-0-/+) 9...Bc5 10.ed4 (10.Nf3 0-0-/+) 10...ed4-+ 11.Nf3 Qe7 (11...0-0 12.0-0-+) 12.Kf1 (12.Kd1 0-0 13.Re1 Qd6-+) 12...d3 (better 12...Qd6-+) 13.Kg1? (better 13.Ne5 Qd6 14.Nc3-/+) 13...Qe2 14.Nc3 (14.Be5 Bf2 15.Kh2-+) 14...Qf2 15.Kh2 Bd6 16.Ne5 Be5 0–1. Agiant (1640) – Arthurred22 (1645), lichess.org, 2020.

3.h3 a5 4.ba5 Ra5 5.Bf6 ef6 6.g4 c5 7.Bg2 Nc6 8.Nc3 Be6 9.Rb1 Qd7 10.a4 (10.Rb6 Nd8-/+) 10...Be7 (10...d4 11.Ne4-+) 11.e3 Nb4 12.Nb5 (better 12.Bf1!?-/+) 12...Ra4-+ 13.c3 Nd3 14.Kf1? (better 14.Ke2 Ra5 15.Kd3 Rb5 16.Ra1-+) 14...c4?? (better 14...Ra5 15.Ke2 Ne5-+) 15.Qa4+- (15.Qa4 0-0 16.Qa5+-) 1–0. beatmeeasy (1920) – Kld686 (1835), lichess.org, 2021.

3.h3 b5 4.c3 e5 5.e3 Nc6 (better 5...Bd7!?=+) 6.Bb5+= Bd7 7.Bc6 Bc6 8.a4 Bd6 9.b5 Bd7 10.g4 (10.Ba3 a6 11.Bd6 cd6=) 10...h5 (10...a6 11.d4 e4 12.ba6 Ra6 13.c4=+) 11.g5= Ne4 12.h4 a6 13.ba6 (13.d3 Nc5 14.d4 ed4 15.cd4 Ne4 16.ba6 Bb4 17.Kf1 f6=) 13...Ra6=+ 14.d3 (14.a5 Bf5 15.d4 c6-/+) 14...Nc5-/+ 15.a5 (better 15.d4!? Na4 16.Ba3-/+) 15...Bf5 16.d4 Nd3 17.Kf1 (17.Ke2 Qb8 18.Ba3 Ra5-+) 17...Nb2 18.Qb3 Nc4 (18...Bb1 19.Rb1 Nc4 20.Qb5 Qd7 21.Qa6 Nd2 22.Ke1 Nb1 23.Qa8 Qd8 24.Qb7-/+) 19.Qb5 Ke7 (better 19...Bd7 20.Qa6 Qb8 21.de5 Bb5 22.Qd6 cd6-+ (worse 22...Nd6 23.Kg2 Ne4 24.Nf3-+)) 20.Qa6-/+ Bd3 21.Kg2?? (21.Ke1 Qb8 22.Nd2-+) 21...Qd7 22.Qb7 (22.Rh3 Ne3! 23.Re3 Ba6 24.de5-+) 22...Qg4 23.Kh2 e4 24.f4 ef3 0–1. beatmeeasy (1875) – Matthias200603 (1895), lichess.org, 2020.

3.h3 c6 4.g4 Nbd7 5.Bg2 e5 6.d3 Be7 (better 6...Bb4!? 7.Nd2 0-0-+) 7.a3-/+ 0-0 8.e3 (8.Nf3 a5 9.b5 Bd6=+) 8...e4 (8...a5 9.b5-/+) 9.Ne2 (better 9.g5 Ne8 10.de4 de4 11.Be4 Bg5 12.Qd3=) 9...Ne5?? (better 9...a5 10.b5 ed3 11.cd3 cb5=+) 10.Be5+- ed3 11.Qd3 Ne4 (11...Nd7 12.Bd4+-) 12.Be4 de4 13.Qd8 Rd8 14.Nd2 f5 (14...Re8 15.Bd4+-) 15.gf5 Bf5 16.0-0-0 (16.Ng3 Bg6+-) 16...Rd5 17.Bb2 a5 18.ba5 (18.c4 Rd3 19.Ng3 g6+-) 18...Rda5 19.Ng3 Bg6 (19...Be6 20.Nb1+-) 20.Nb3 (20.Nc4 Rd5+-) 20...Rb5 (20...R5a7 21.Rhg1+-) 21.Rd7 Ba3 22.Rg7 Kf8 23.Ba3 (better 23.Rc7 Bb2 24.Kb2+-) 23...Kg7 24.Bb2 Kf8 25.Nd4 (better 25.Rd1+-) 25...Rd5? (better 25...Rb4+-) 26.Ne6 Ke7 27.Nf4 (27.Nc7 Ra4 28.Nd5 cd5+-) 27...Rda5 28.Ng6 hg6 29.Kd2?? (better 29.Rd1!? Ra4 30.Bd4 b6 31.Ne4 Rf8+-) 29...Rd8?? (better 29...Rd5 30.Bd4 c5=) 30.Ke2+- Ra2? (better 30...Ra4+-) 31.Bd4?? (better 31.Rb1+-) 31...Rc2+= 32.Kf1 (32.Kd1 Rf2 33.Ne4+=) 32...Rc1 (better 32...c5 33.Bg7 Kf7-/+) 33.Kg2+- Rh1 34.Kh1 Rb8 (34...b5 35.Ne4 Ke6 36.Kg2+-) 35.Ne4 b6 36.Nc3 (36.Kg2 Ke6+-) 36...c5 37.Be5 Rd8 38.Nb5 (38.Kg2 Kd7+-) 38...Rd5 39.Bc7 c4 (better 39...Kd7+=) 40.Bb6?? (better 40.Nd4 b5 41.Kg2+-) 40...Rb5-+ 41.Bd4 Rb3 42.Kg2 c3 43.Bc3 Rc3 44.Kf3 Kf6 45.Kf4 (45.h4 Kf5-+) 45...Rc4 46.Kf3 (46.Kg3 g5-+) 46...Kf5 (better 46...Ke5-+) 47.e4 (47.Kg3-+) 47...Re4 48.Kg3 g5 49.f3 (49.Kf3 Rf4 50.Kg2 Ke4-+) 49...Rh4 50.Kg2 Kf4 51.Kh2 Black now must not overlook the idea Rh6 51...Kf3 52.Kg1 (52.Kh1 Rh3 53.Kg1 g4 54.Kf1 Rh1) 52...Rh3 53.Kf1 Rh1 0–1. adabriwala – ondergo (1605), lichess.org, 2019.

3.h3 d4 4.Nf3 g6 5.Nd4 Bg7 6.Nf3 0-0 7.g4 b6 8.Bg2 Bb7 9.0-0 Nc6 10.b5 Na5 11.d3 Qd7 12.Nc3 Nd5 13.Nd5 Bb2 14.Rb1 Bg7 15.Ne3 Rad8 16.c4 f5 17.gf5 gf5 18.Qc2 e5 (18...f4 19.Nd5+=) 19.c5+- Bf3 20.Bf3 (20.ef3?! Qd3 21.Qd3 Rd3 22.cb6 cb6=) 20...f4 21.Ng2 (better 21.Bg4!? Qe7 22.Nc4 Nc4 23.Qc4 Kh8 24.Qa4+-) 21...Qh3= 22.Bg4?? (better 22.Rfc1=) 22...Qg4-+ 23.f3 Qg3 24.cb6 (24.Rb4 Rfe8 25.Re4 Bf8 26.cb6 cb6-+) 24...cb6 25.Qc7 (25.Rb4 Rf5 26.Qc7-+) 25...e4! 26.Rb4 (26.de4; 26.fe4 Bd4 Pinning) 26...Bd4 (better 26...ed3 27.Re1 d2-+) 27.Rd4 Rd4 28.de4 (28.fe4 Ra4 29.Qe5-+) 28...Rf7 (better 28...Nc4 29.Kh1 Nd2 30.Rc1 Qh3 31.Kg1-+) 29.Qe5?? (29.Qb8 Rf8 30.Qc7-+) 29...Rd8-+ 30.Rc1 (30.Qe6-+) 30...Rg7 31.Qe6 Kh8 (31...Kh8 32.Qg6 Rg6 33.Kf1 Qg2 34.Ke1 Qg1) 0–1. beatmeeasy (1975) – Claudio_Dx (2010), lichess.org, 2021.

3.h3 Qd6 4.a3 Bf5 5.e3 Nc6 6.Nf3 a6 7.c4 dc4 8.Bc4 b5 9.Bb3 a5 10.Nc3 Bd3 (< 10...ab4 11.Nb5 Qd7 12.ab4 Ra1 13.Qa1+/–) 11.ba5 Ra5 12.Ne2 Bf5 (12...e5 13.a4=+) 13.d4 e6 14.0-0 Be7 15.Qe1 b4 (15...Ra7 16.a4 b4 17.Ne5=) 16.a4 (16.Ne5!? ba3 17.Nc6 ab2 18.Ra5+=) 16...Ra7 17.Rc1 Rb7 (17...Na5 18.Bd1=+) 18.Ne5 Na5 19.Bc2 (19.Bd1!?=) 19...Bc2=+ 20.Rc2 0-0 21.f3 Nd5 22.e4? (better is 22.Qf2!?-/+) 22...Ne3-+ 23.Rc5 Nf1 24.Ra5+= Ne3 25.Qd2 f6-/+ 26.Qe3 fe5 27.Re5 Qc6 28.Qb3= Rf6 29.Kh1 Qa6-/+ 30.Qd1 Bd6 31.Rg5 Rf7 32.d5 Qc4 33.de6 Qe6 34.Nd4 Qh6 35.Rg4 Qf6=+ 36.Bc1 Qe5 37.g3 Qh5 38.Kg2= Qe5 39.Nb5 Qa1-+ 40.Qc2 b3! 41.Qb3?? Qc1 42.h4 Qd2 43.Kh3 c6 44.Qc3 Qd1 (45.Rg5 cb5 46.Rb5 Qf1 47.Kh2 Rb5 48.ab5 Qf2 49.Kh1 Bg3 50.Qc8 Rf8 51.Qc4 Kh8 52.Qe2 Qe2 53.Kg1 Qf2 54.Kh1 Qf1) 0–1. thotares (1625) – deepaktnj, internet, 2007.

3.h3 Nbd7 4.g4 e5 5.a3 c6 6.Bg2 Bd6 7.d3 0-0 (7...a5 8.Nd2-/+) 8.e3 (8.c4 d4=+) 8...a5-/+ 9.ba5 Ra5 10.Nd2 b6 (10...b5 11.Nb3 Ra4 12.Ne2-/+) 11.Nb3 Ra8 12.Ne2 Bb7 13.Ng3 g6 (13...b5 14.Nf5 Bc7 15.0-0-/+) 14.Qe2 (better 14.c4=+) 14...Re8 (better 14...b5!?=+) 15.g5+= Nh5 16.Nh5 gh5 17.Qh5 Nf8 18.0-0-0 (18.h4!?+=) 18...Ba3= 19.Ba3 Ra3 20.Kd2 Qe7 21.Rhg1 (21.Ra1 Qb4 22.Ke2 Rea8 23.Ra3 Ra3=+) 21...Ng6 (21...Qb4 22.Ke2-/+) 22.Rde1? (22.Ra1!?=) 22...Ba6 (better 22...Qb4 23.Ke2 e4 24.de4 Ba6 25.Kf3 Re4-+ (25...Qe4?! 26.Kg3 Qe5 27.f4-+)) 23.f4?? (better 23.Nc1-/+) 23...Qb4-+ (23...ef4 24.ef4 Qb4 25.Kd1 Re1 26.Re1 Bd3 27.Re8 Nf8 28.cd3 Qb3 29.Ke1 Qc3 30.Kf1 Qd3 31.Qe2 Qb1 32.Qe1-+) 24.Ke2 ef4 25.Kf2 (25.Nc1-+) 25...fe3 26.Re3 Re3 27.Ke3 Qe7 (27...Bd3 28.Bf3 Bc2 29.Kf2 Rb3 30.Qg4 Qd2 31.Kg3-+) 28.Kd2 Nf4 (better 28...Rb3!? 29.Qg4 Rb2 30.Ra1-+) 29.Qf3 (29.Qg4 Bd3! 30.g6 hg6 31.Ra1-+) 29...Ng6 (29...Bd3!? 30.Bf1 Qb4 31.Kd1-+) 30.Re1?? (30.Qh5 Rb3 31.cb3 Qb4 32.Ke3 Qc5 33.Kd2 Qg1 34.Qe2-+) 30...Qb4 (better 30...Qg5 31.Kd1 Ne5 32.Re5 Qe5 33.Qg4 Qg7-+) 31.Kd1-/+ Ra2 (better 31...Qf4!?-/+) 32.Re8=+ Nf8 33.g6? (better 33.Qe3=) 33...hg6-+ (worse 33...fg6 34.Nc1 Bd3 35.Qd3+=) 34.Qe2 (better 34.Re2-+) 34...Qf4?? (34...Bb5 35.Qd2 Qd2 36.Kd2-+) 35.Bf3? (better 35.Qe7 Qh6 36.Ra8=+) 35...Kg7 (35...Bb5 36.Nc1 Ra1 37.Qe3 Qe3 38.Re3-+) 36.Qe5 (36.Bg4 c5-+) 36...Qe5 37.Re5 Ne6 38.Bg4 Bc8 (38...Nf4 39.Re7-+) 39.Kd2 (39.Be6 Be6 40.Nd4 Bd7-+) 39...Bd7 (better 39...f5 40.Bf3 Kf6-+) 40.Ke3?? (40.Be6 Be6 41.Nd4-+) 40...Ra8 (better 40...Kf6 41.d4 Rc2 42.Kd3-+) 41.Nd4 Nd4 42.Kd4 Re8 (better 42...Bg4 43.hg4 Ra4 44.Ke3 Rg4-+) 43.Bd7+- Re5 44.Ke5 f6 45.Kf4 (better 45.Kd4!? c5 46.Kd5 Kf7+-) 45...c5 46.h4 (46.c3 Kf7+-) 46...Kh6 47.Kg4 (better 47.c3!?+-) 47...f5 48.Kg3 (better 48.Bf5 gf5 49.Kf5+-) 48...Kh5? (48...d4 49.Bb5+-) 49.Be8 (49.c3 d4 50.cd4 cd4+-) 49...Kh6? (49...d4!?+=) 50.Kf4 (better 50.c3+-) 50...Kg7? (better 50...d4+-) 51.Kg5+- Kf8 (51...b5 52.Bg6 f4 53.Bh5+-) 52.Bc6 d4 53.Bb5 (better 53.Kg6 Kg8+-) 53...Kg7 (53...Kf7 54.Bc4 Kg7 55.Be6+-) 54.Bc4 Kh7 (54...f4 55.Kf4 Kh6 56.Kg4+-) 55.h5 (better 55.Bf7+-) 55...gh5 56.Kh5 f4 57.Kg4 Kg7 58.Kf4 Kf6 59.Ke4 Ke7 60.Kd5 Kd7 61.Bb5 Kc7 62.Ba4 Kb7 63.Bb5 Kc7 64.Ba4 (64.Bc6 Kc8+-) 64...Kb7 65.Bc6 (65.Kd6!? c4+-) 65...Kc7 (65...Ka6 66.Kd6 Ka5 67.Bd5+-) 66.Be8 (better 66.Bb5 Kb7 67.Kd6 c4 68.Bc4 Kb8+-) 66...Kb7 67.Kc4 Ka6 68.Bb5 (68.Bf7 Ka5+-) 68...Ka5 (68...Kb7 69.Bd7 Ka6 70.Kd5+-) 69.Bc6 Ka6 70.Ba4 Ka5 71.Bb3 Ka6 72.Kd5 Ka5 (72...Kb7 73.Kd6+-) 73.Kc6 Ka6 74.Kd5 (74.Bc4!? Ka5+-) 74...Ka5 75.Kc4 (better 75.Bc4!? Kb4+-) 75...Ka6 76.c3 (better 76.Ba2+-) 76...dc3 77.Kc3 Kb5 (77...b5 78.Bd5+-) 78.Bc4 (78.Bf7 Ka6+-) 78...Kc6 79.Kb3 b5 80.Be6?? (better 80.Bf7+-) 80...Kd6= 81.Bf7 Kc6?? (better 81...c4 82.dc4 bc4 83.Bc4=) 82.Kc3 Kb6 83.Be8 Ka5 84.Kb3?? (84.Bc6 Kb6 85.Bd5 Ka5+-) 84...Kb6?? (84...c4 85.dc4 bc4 86.Kc3=) 85.Kc3 Ka5 86.Bb5?? (better 86.Bc6+-) 86...Kb5= 87.d4 cd4 88.Kd4 ½–½. adabriwala (1615) – danesh94 (1825), lichess.org, 2019.

3.h3 e5 4.Be5 Bb4 5.c3 Ba5 6.e3 0-0 7.Bf6 Qf6 (worse 7...gf6 8.Qh5+/-) 8.Ne2 (8.Bd3 Be6=+) 8...c5 9.Nf4 Rd8 10.Be2 Nc6 11.d3 (11.Qb3!? c4 12.Qb5-/+) 11...d4 12.Bf3? (better 12.0-0-+) 12...dc3 (12...Bc3?! 13.Nc3 dc3 14.0-0-/+) 13.Qb3 (13.Qc1 c2 14.Nd2-+) 13...c2 14.Nd2 (14.Ke2 Qa1 15.Bc6 bc6 16.Qc2-+) 14...Qa1 15.Bd1 Qd1 0-1. onam (2165) - karpasov (2630), net-chess.com, 2022.

3.Nh3 Qd6 4.b5 Qb4 5.Be5 (5.Bf6!? ef6 6.e3-/+) 5...Bh3-+ 6.gh3? (better is 6.Bf6!? ef6 7.gh3-+) 6...Qe4 (6...Qb5?! 7.Bc7 d4 8.Bb8 Rb8 9.a4-/+) 7.Bc7? (7.Bf6 Qh1 8.Bb2-+) 7...Qh1 8.d3 Nbd7 9.Nd2 e5 10.Nf3 (10.a3-+) 10...Bb4 11.Nd2 Rc8 12.a3 (12.c3 Bc3 13.Bd6 Ba1 14.Qa1 e4-+) 12...Bd2 13.Qd2 Rc7 14.0-0-0 0-0 15.Qg5 (15.e3 Rfc8-+) 15...Rfc8 16.c4 dc4 17.d4 Qd5 18.e3 Qb5 (better is 18...c3 19.Bc4 Qc4 20.Rg1-+) 19.f4 Qb3 20.fe5 c3 21.Rd3 (21.Qg2 Qa3 22.Kc2 Qb2 23.Kd3 Ne5 24.de5 Rd8 25.Qd5 Rd5) 21...Qb2 22.Kd1 c2 (22...c2 23.Ke1 c1Q 24.Rd1 Qbd2) 0–1. Penteshin,Yury – Kiriushin,V (2195), Doroshkevicha Mem, Belorechensk RUS, 2009.

3.Nh3 e6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.Nh3).

3.h4 a5 4.b5 c5 5.e3 c4 (5...e6 6.g4=+) 6.d3= Bg4 (6...cd3 7.Bd3 e6 8.h5=) 7.f3+= Be6 (7...Bd7 8.dc4 Qc7 9.Qd3 Qg3 10.Kd1 dc4 11.Qc4 Qd6 12.Nd2+=) 8.dc4 dc4 (8...Qd6!?+=) 9.Qd8+- Kd8 10.Ne2 g6 (better 10...Nd5!? 11.Bd4 Bd7+-) 11.Nf4+- Bf5 12.g4 Bc2 13.Na3 (13.g5 Nbd7 14.gf6 e5+-) 13...Bd3 (13...c3 14.Bc3 Ba4 15.Nc4+-) 14.g5 (better 14.Nd3 cd3 15.g5+- (15.Bd3?! Bg7+-)) 14...h5? (better 14...Bf1 15.Rf1 c3 16.Bc3 e5+-) 15.Nc4 e5 (15...Bf1 16.Rf1 Nbd7+-) 16.Nd3 Bg7 (16...Nfd7 17.0-0-0 Bg7 18.Nde5 Ke8+-) 17.gf6 Bf6 18.Nb6 Ra7 19.Rc1 Nd7 20.Rc8 Ke7 21.Ba3 Ke6 (21...Nc5 22.Bc5 Ke6 23.Bh3) 22.Bh3 1–0. Maestro – Verner, internet, 2020.

3.h4 c5 4.bc5= Nc6 5.d4 Ne4 6.Nd2 Qa5 7.a3 Nc3 8.Bc3 Qc3 9.Ngf3 (better 9.e3!?=) 9...Nd4=+ 10.Nd4 Qd4 11.Nb3 Qd1 12.Rd1 e6 13.g4 a5 14.a4 Bd7 15.Ra1 Rc8 16.Na5 Rc7 (16...Bc5 17.Nb3-+) 17.e3 (17.Rb1 Rc5 18.Nb7 Rc4=+) 17...Bc5 18.Bb5?? (better 18.Nb3-/+) 18...Bb4-+ 19.c3 (19.Kd1 Ba5 20.h5 Bc3-+) 19...Ba5 20.Bd7 Kd7 (worse 20...Rd7 21.Ra3-+) 21.Ke2 Rc3 22.Rhb1 b6 23.Rb5 Rhc8 24.f4 (24.Kf3 R8c4-+) 24...R8c5 (24...d4 25.Re5 d3 26.Kd1-+) 25.Rbb1 (25.Rc5 bc5 26.h5 c4-+) 25...Rc2 (better 25...d4!? 26.ed4 Rc2 27.Kf1-+) 26.Kf3 Rh2 27.h5 (27.Kg3 Rcc2 28.Rg1 Rhe2-+) 27...Rcc2 (better 27...Rh3!? 28.Kg2 Re3 29.Rc1-+) 28.Rg1 Ra2 29.Ra2 Ra2 30.g5 Ra4 31.Rb1 Rb4 32.Ra1 Kc6 33.Kg4 (33.Rh1 Rb3 34.h6 g6-+) 33...d4 (33...Rb3 34.Rc1 Kd7 35.e4 de4 36.Rc2-+) 34.e4 (34.Rc1 Kb7 35.e4 d3-+) 34...d3 35.Rc1 Kd7 36.Rd1 Rd4 37.Kf3 d2 38.Ke3 Ra4 0–1. beatmeeasy (1895) – I_love_bananas (1915), lichess.org, 2020.

3.h4 Nc6 4.b5 Nb8 5.Nf3 e6 6.c3 c5 (6...Nbd7 7.Qc2=+) 7.e3 Bd6 8.Be2 (8.c4 Nbd7=) 8...0-0 (8...a6 9.c4 ab5 10.cd5 ed5 11.Bf6 gf6 12.Nc3=+) 9.a4 (9.c4 Nbd7=) 9...a5 (9...c4 10.d3 cd3 11.Qd3=+) 10.h5 h6 11.Rg1 (better 11.c4!?=+) 11...e5-/+ 12.c4 e4 13.Ne5 Be5 14.Be5 d4 15.Bf6? (better 15.Qb3-/+) 15...Qf6-+ (15...gf6?! 16.d3 f5 17.g4=) 16.ed4 cd4 17.d3 e3 18.Rf1 Qh4 19.g3 Qe7 (better 19...Qh2 20.Bg4 Nd7-+) 20.f3?? (better 20.fe3 de3 21.Rf3-+) 20...Qb4 21.Nd2 ed2 (worse 21...Qd2 22.Qd2 ed2 23.Kd2-+) 22.Qd2 Qd2 (22...Qc5!? 23.Kf2-+) 23.Kd2 Nd7 24.f4 (24.Rae1 Nc5-+) 24...Nc5 25.Ra3 (25.Rae1 Re8-+) 25...Re8 26.f5 Re3 27.g4 Bd7 28.f6 (28.Bf3-+) 28...Rae8 (better 28...Ne4!? 29.de4 Ra3 30.e5 Ra4 31.fg7-+) 29.Bd1 Ne4! 30.de4 (30.Kc2-+) 30...Ra3 31.fg7 (31.e5 Rc8 32.g5 hg5 33.fg7 Rc4-+) 31…Kg7 0–1. beatmeeasy (1910) – Maduke (1915), lichess.org, 2020.

3.h4 Qd6 4.h5 (4.a3 Bg4=+) 4...Qb4-/+ 5.Bc3 Qd6 6.Nf3 Nc6 7.e3 e5 8.Bb5 e4 9.Ne5 a6 10.Bc6 bc6 11.d4 a5 (11...c5 12.h6-/+) 12.Nd2 a4 13.0-0 Ba6 14.Re1 Be7 15.Rb1 0-0 (15...Qe6!?-/+) 16.Bb4=+ Qb4 (better 16...Qe6!? 17.Be7 Qe7 18.Nc6 Qe6=+) 17.Rb4+= Bb4 18.c3 (18.Nc6 Bc3=) 18...Bd6 (18...Bc3!? 19.Qc1 Bb4=+) 19.Nc6+= Bb5 20.Ne5 c5 21.h6 gh6 (21...cd4!? 22.ed4 Rac8 23.hg7 Rfe8+-) 22.Ng4+- Kg7 (22...Be7 23.Nh6 Kh8 24.Nf5+-) 23.Nf6 (23.dc5 Bc5 24.Nf6 Kf6+-) 23...Kf6 24.c4 (24.Qh5 Rad8 25.dc5 Bc5 26.Ne4 de4 27.Qc5+-) 24...dc4? (better 24...Bc4 25.Nc4 dc4 26.dc5 Bc5+-) 25.Ne4 Ke7 26.Nd6 (26.Nc5?! Rfc8+-) 26...Kd6 27.Qh5 Rac8 28.Qe5 (28.Qh6?! f6 29.Qf4 Ke6 30.Qe4 Kd6+-) 28...Kd7 29.Rb1 (worse 29.dc5 Rc6 30.Rb1 Re6 31.Qd5 Ke7 32.Rb5 Kf6+-) 29...f6 (29...c3 30.Rb5 Rc7 31.dc5 Rd8 32.c6 Kc8 33.Qf5 Rcd7 34.cd7 Rd7 35.Rc5 Kb7 36.Qd7 Ka6 37.Rb5 c2 38.Qb7) 30.Qf5 (30.Qf5 Ke7 31.Rb5+-) 1–0. Wall,Bill – Guest1255711, playchess.com, 2012.

3.h4 Nbd7 4.h5 e5 5.Nf3 (5.a3 h6-/+) 5...e4-+ 6.Ng5 (6.Ne5 Bb4 7.h6 g6-+) 6...Bb4 (6...h6 7.Nh3-+) 7.c3 (7.h6 Rg8-/+) 7...Bd6 8.e3 c5 (8...h6 9.Nh3-+) 9.Na3 (9.h6 Rg8-+) 9...a6 (9...h6 10.Nh3-+) 10.c4 Be5 11.Be5 Ne5 12.cd5 Nd5?? (better 12...Qd5 13.h6 gh6-+) 13.Ne4= 0-0 14.h6 (worse 14.Nc5 Qa5 15.Qc1 Nb4-/+) 14...g6 15.f4 (better 15.Qb3 Nf6 16.Nc5+=) 15...Bg4?? (better 15...Ng4 16.Qb3 b6=+) 16.Qb3+- Nc6? (16...Nf6 17.Nc5 Ned7 18.Nb7 Qc7+=) 17.Nc5 (better 17.Qd5! Qd5 18.Nf6 Kh8 19.Nd5+-) 17...Re8 (17...b5 18.Bd3+=) 18.Bc4 (18.Qb2 Nf6 19.Nb7 Qe7+-) 18...Nf4 (better 18...Qf6!? 19.0-0 Na5+=) 19.Bf7 Kf8? (19...Kh8 20.Be8 Ng2 21.Kf1 Qf6 22.Kg1 Qa1 23.Kg2 Qf6 24.Bc6 bc6+-) 20.Be8+- Ng2 21.Kf2 (21.Kf1 Qf6 22.Kg1 Qa1 23.Kg2 Qf6 24.Bc6 Qc6 25.e4 Qc5 26.Rf1 Bf5 27.Qb7 Ra7 28.Qb8 Ke7 29.ef5 Qd5 30.Kh3 Rb7 31.f6 Kf7+-) 21...Qf6? (better 21...Qd2 22.Kg1 Re8+-) 22.Kg2 (better 22.Kg3 Qf3 23.Kh2 Ne3 24.Qe3 Qe3 25.Rhf1 Ke8 26.de3+-) 22...Qf3= 23.Kg1 Qg3 24.Kf1 Re8 (24...Qf3 25.Kg1 Qg3 26.Kf1 Qf3 27.Kg1=) 25.Qb7 (better 25.e4 Be2 26.Ke2 Nd4 27.Kd1 Nb3 28.Nb3 Re4 29.Kc2=) 25...Ne7?? (better 25...Qf3!? 26.Kg1 Qg3 27.Kf1 Qf3 28.Kg1 Qg3 29.Kf1=) 26.Nd7 (better 26.Qg2 Nf5 27.Kg1+-) 26...Kf7? (better 26...Bd7 27.Qg2 Nf5+=) 27.Rg1 (better 27.Qg2 Qg2 28.Kg2 Bd7 29.e4+-) 27...Qf3?? (27...Qh3 28.Qg2 Bd7 29.Qh3 Bh3 30.Ke1 Be6 31.Rf1 Kg8+-) 28.Qf3 Bf3 29.Ne5 Kf6 30.Nf3 Nf5 31.Nc4 Nh6 32.Kf2 (32.Rb1 Nf5+-) 32...Nf5 (32...Rc8 33.d3 Rd8 34.Ke2+-) 33.d4 h6 34.Nce5 g5 35.Rg4 (35.Rac1 Rd8+-) 35...Nd6 36.a4 (36.Rh1 Kg7 37.Ng5 hg5 38.Rg5 Kf8 39.Rh8 Ke7 40.Rh7 Ke6 41.Rg6 Kd5+-) 36...Kf5 (36...h5 37.Rg2 Ne4 38.Ke2+-) 37.Rgg1 (better 37.Rh1 Ne4 38.Kg2 Nf6 39.e4 Ne4+-) 37…Ne4 (37...Ne4 38.Ke1 h5+-). beatmeeasy (1865) – DXY (1950), lichess.org, 2020.

3.h4 Nfd7 4.a4 (4.Nf3 e5=+) 4...e5-/+ 5.Nf3 f6 6.c3 Be7 7.Qb3 c6 8.h5 0-0 (8...a5!?=+) 9.h6 g6 10.e4 Nb6 (better 10...Qe8!?=) 11.a5+= Nc4 12.Bc4 dc4 13.Qc4 Rf7 14.d4 Nd7 15.de5 (15.a6 Qb6+-) 15...fe5 (15...Ne5!? 16.Ne5 fe5+=) 16.Na3 Bf6 17.0-0-0 (17.0-0 Qe7+-) 17...Qe7+= 18.Nc2 Nb8 19.Ba3 Be6 20.Qe2 Qc7 21.Qe3 Na6 22.Ng5 (better 22.Rd2!?+=) 22...Bg5=+ 23.Qg5 Qe7?? (23...Rf2 24.Rhf1 Rf1 25.Rf1 Bc4+=) 24.Qe7+- Re7 25.b5! Rd7 (25...cb5 26.Be7 Discovered attack) 26.Rd7 Bd7 27.ba6 ba6 28.Nb4 c5 29.Na6 Bb5 30.Nc5 Rd8 31.Rd1 Rd1 32.Kd1 Kf7 33.Kd2 Bc4 (33...g5 34.Nd3 Ke6 35.Bf8+-) 34.Ke3 (34.Nd7 Bf1 35.g3 Bg2+-) 34...g5 (34...Bb5 35.f4+-) 35.g4 Ba2 (35...Bb5 36.Nd3 Ke6 37.Bf8+-) 36.Nd3 (36.Nd7!? a6+-) 36...Ke6 37.Nb4 (better 37.Bf8!? Bc4+-) 37...Bc4 38.Nc6 a6 39.Nd8 Kf6 40.Bd6 (40.Bf8 Bb5+-) 40...Kg6 (40...Bb5 41.Nb7+-) 41.Bf8 (41.Nc6 Be6+-) 41...Bb5 42.Ne6 Bd7 (42...Kf7 43.Nc7 Bc4 44.Bg7+-) 43.Nc5 Bc8 (43...Bg4 44.Na6 Bd7 45.Nc5+-) 44.f3 (44.Nd3 Kf6 45.Bg7 Ke7 46.Ne5 Ke8+-) 44...Kf7 45.Bg7 1–0. beatmeeasy (1875) – XxxEfra (1810), lichess.org, 2020.

3.h4 h5 4.Nf3 Bg4 5.Nh2 Bd7 6.a4 e6 7.c3 Bd6 8.Nf3 c5 9.b5 a6 10.ba6 Na6 11.e3 Qc7 (better 11...Qb6 12.Qc2 c4-/+) 12.Qb3? (better 12.c4=+) 12...c4-+ 13.Qc2 Nc5 14.Nd4 Ra4 (14...Ba4?! 15.Qc1 0-0 16.Ba3-+) 15.Ra4 Ba4 16.Qc1 0-0 (better 16...Ng4 17.Rh3 Ne5 18.e4 de4 19.Ba3 Ncd3 20.Bd3 Nd3 21.Rd3 ed3 22.Kf1-+) 17.Be2 Be5 (17...Bd7 18.0-0-+) 18.f4 Bd4 19.ed4?? (better 19.cd4 Nce4 20.Rh3-+) 19...Nb3 20.Qc2 (20.Qd1 Qf4 21.d3 Ra8-+) 20...Qf4 21.Rf1 (21.d3 Ng4 22.Bg4-+) 21...Qg3 22.Rf2 (22.Kd1 Ra8 23.Bf3 Ne4 24.Be4 de4-+) 22…Ne4 (22...Ne4 23.Qe4 de4-+) 0–1. beatmeeasy (1955) – Kevinthegerbil (2025), lichess.org, 2021.

3.h4 h6 4.Nf3 e6 5.a3 Be7 6.d4 Nc6 7.Nbd2 0-0 8.e3 Re8 9.Be2 a6 10.b5 (better 10.0-0!?=) 10...ab5-/+ 11.Bb5 Bd7 12.c4 Na5 13.Bd7 Qd7 14.c5 (14.Ne5 Qd6 15.cd5 ed5=+) 14...b6 (14...Ng4 15.0-0-/+) 15.Ne5=+ Qb5 16.Bc1? (better 16.Rb1!?-/+) 16...bc5-+ 17.Rb1 Qa6 18.dc5 Bc5 19.g4 Bd6 20.g5? (20.Bb2 Rab8 21.f4 Be5 22.fe5-+) 20...Be5 21.gf6 Bf6 22.Nf3 (22.Bb2 e5-+) 22...c5 23.Qc2 Nc4 24.0-0 Qd6 25.e4 (25.Qd3 Qc6-+) 25...Ne5 (better 25...Na3!? 26.Ba3 Ra3 27.Rb3 Rb3 28.Qb3-+) 26.Ne5 Qe5 27.ed5 Bh4 (27...ed5 28.Qc5 Qf5 29.Rb3-+) 28.Qc4 (28.d6 Qd6 29.Be3-+) 28...Qg5 (better 28...Qh5 29.Rb2 ed5-+) 29.Bg5+- Bg5 30.Qc5 ed5 31.Qd5 Ra3 (31...Red8 32.Qf3 Be7 33.Rb7 Ra3 34.Qh5+-) 32.Qc6 (32.Rb7!? Rf8+-) 32...Rf8 (32...Raa8 33.Rfd1+-) 33.Ra1 Rh3 34.Kg2 Rb3 35.Ra8 Rbb8 36.Rb8 Rb8 37.Re1 (37.f4 Bh4+-) 37...Rf8 38.Re8 Be7 (38...g6 39.Re4 h5 40.f4+-) 39.Rf8 (better 39.Re7 Kh7 40.Qd5+-) 39...Bf8 40.f4 Kh7 (40...g6+-) 41.Qe8 Kg8 (41...Bc5 42.Qf7 Bd4 43.Kh3 Bf2 44.Kg4 Bb6 45.Kh5 Bd8 46.Qf5 g6 47.Qg6 Kh8 48.Qh6 Kg8 49.Kg6 Bf6 50.Qh7 Kf8 51.Qf7) 42.Kg3 f6 (42...g6 43.f5! Kg7 44.f6 Kf6 45.Qf8+-) 43.Qg6 (43.f5 Kh7 44.Qf8 h5 45.Kh4 g5 46.Kh5 g4 47.Qf7 Kh8 48.Kg6 g3 49.Qg7) 43...Bd6 (43...Bc5 44.Kg4 Kf8+-) 44.Kg4 Bf8 45.Kh5 Ba3 (45...Bd6 46.Qe8 Kh7 47.Qe4 f5 48.Qf5 g6 49.Qg6 Kh8 50.Qh6 Kg8 51.Kg6 Be5 52.Qh7 Kf8 53.Qf7) 46.Qe8 Bf8 (46...Kh7 47.Qe4 f5 48.Qf5 g6 49.Qg6 Kh8 50.Qh6 Kg8 51.Kg6 Bb2 52.Qh7 Kf8 53.Qf7) 47.f5 (47.Kg6 h5 48.Qf7 Kh8 49.Qf8) 47...g5 (47...Kh8 48.Kg6 Kg8 49.Qf7 Kh8 50.Qf8) 48.fg6 f5 (48...Kg7 49.Qf7 Kh8 50.Qf8) 49.Qf7 Kh8 50.Qf8 1–0. beatmeeasy (1845) – east36 (1695), lichess.org, 2020.

4.e3 Bb7 5.c4 dc4 6.Nf3 Ba6 (6...Bd5 7.Nc3=) 7.Nc3 (7.Bf6 ef6 8.Qc2 Bb7=) 7...g6 (7...c6!?=) 8.Qa4 Qd7 9.Qd7 (9.b5 Bb7+/–) 9...Nbd7+= 10.b5 Bb7 11.Bc4 Bf3 12.gf3 Ne5 (12...Bg7 13.Ne4+=) 13.Be2+/– 0-0-0 14.d4 Ned7 15.a4 (15.Ne4 Bg7+/–) 15...e6+= 16.e4 (16.a5 Bb4 17.ab6 ab6+=) 16...Bb4 17.Rc1 Nh5 18.Kf1 Nf4 (18...Kb7 19.Bc4+=) 19.Bc4 Nh3 (19...Nh5 20.Ne2+=) 20.Ne2+/– Ng5 (20...Bd2 21.Rc2 Bg5 22.d5+/–) 21.Kg2 Rhg8?? (21...h6 22.d5 Rhe8 23.h4+/–) 22.d5 e5? 23.h4+- Ne4 24.fe4 Nc5 25.f3 Na4 26.Be5 Rge8 27.Bf4 Nb2 28.Rc2 Nc4 29.Rc4 Bc5 30.Re1 Rd7 31.Nd4 f5 32.Ne6 Bd6 33.Bd6 Rd6 34.Rc7 (34...Kb8 35.Rh7 fe4 36.fe4 Ree6 37.de6 Re6 38.e5+-) 1–0. thedesertfox (2055) – flgs (1715), net–chess.com, 2004.

4.e3 Bb7 5.d4 Nbd7 6.Nf3 e6 7.Nbd2 Bd6 8.c4 Qe7? (8...a5 9.c5 Be7 10.Bd3=) 9.cd5 (better is 9.c5 bc5 10.dc5 Nc5 11.bc5 Bc5 12.Qa4 c6 13.Rb1+-) 9...ed5= (worse is 9...Nd5 10.e4+-) 10.Bd3 0-0-0 (10...0-0 11.Nh4=) 11.0-0+= Kb8 12.Qe2 h5 13.Ba6 (13.b5 Ne4+/–) 13...Ba8 (13...Ba6 14.Qa6 h4 15.h3+=) 14.Rac1 Ng4 (14...Ne4 15.Bd3+/–) 15.h3 f5 16.Bb5 (16.hg4 hg4 17.Bd3 gf3 18.Nf3 Qf6-/+) 16...g5 Black prepares f4 17.Bc6 (17.Bd7 Rd7 18.Rfd1 f4+=) 17...Bb7? (better is 17...Bc6 18.Rc6 Nh6=) 18.Bb7+/– (worse is 18.hg4 hg4 19.Rfe1 Bc6 20.Rc6 Rh6-/+) 18...Kb7 19.b5 (better is 19.Qb5!? Ngf6 20.Qc6 Kb8 21.Ng5+/–) 19...f4 20.Ne5 (20.e4 Nh6 21.e5 g4+/–) 20...Nde5 21.de5 Ne5 22.ef4 gf4 23.Rfe1 Rhe8 24.Qh5 Qg7 25.Nf3?? (better is 25.Kf1 Re7 26.Nf3+=) 25...Nf3-+ 26.Qf3 Qb2 27.Qd5 Kb8 28.Rb1 Re1 29.Re1 f3 30.Qf3 Rf8 31.Qe2 Qf6 32.g3 Qg5 33.Kg2 Qd5 34.Qe4 Qb5 35.a4 Qb2 36.Re2 Qf6 37.h4 c5 38.Qc6 Bc7?? 39.Re8+- Bd8 40.Rf8?? Qc6-+ (40...Qc6 41.f3 Kc8-+; 40...Qf8?! 41.h5-/+) 0–1. Fournier,Frederic – zaknuz (1690), Active, 2008.

4.e3 Bb7 5.Nf3 a5 =.

4.e3 e6 5.Nf3 =.

4.bc5 Nc6 5.d4 e5 6.e3 e4 (6...ed4 7.ed4 Be7 8.Nf3=) 7.f3 (7.c4 Be6+=) 7...a6 (7...b6 8.cb6 Qb6 9.Ra2=) 8.fe4 (8.c4 b6+=) 8...Bg4 (8...Ne4!? 9.Qf3 Qa5 10.c3 b6=) 9.Be2+= Be2 10.Qe2 Ne4 11.Nf3 Be7 (11...b6!?=) 12.0-0+/– 0-0 (12...b6 13.cb6 Qb6 14.c4+/–) 13.Nbd2 f5 14.c3 (14.c4 Rb8+/–) 14...Bf6 15.Rab1 Rb8 16.Ne1 b5 17.Nd3 (17.Rf5 Qd7 18.Rf1 Nd2 19.Qd2 Na5+/–) 17...Na5 (17...Qc8 18.Nf4 Qd7 19.Ne4 fe4 20.Qh5+=) 18.Ne4 fe4 19.Nb4 Nc4 (19...Qd7 20.Qh5 Rbd8 21.Bc1+/–) 20.Na6 (better is 20.Nc6!? Qd7 21.Nb8 Rb8 22.Bc1+-) 20...Ra8 21.Nb4 Nb2? (better is 21...Qd7!?+/–) 22.Rb2 Ra3 23.Qh5 Qa5?? 24.Nd5 Ra1 25.Rbb1 Rb1 26.Rb1 Qa2 27.Rf1 Qd2 28.Nf6 Rf6 29.Qd5 Kf8+- 30.Qd8 Kf7 31.Qd7 Kg6 32.Qg4 Kf7 33.Qd7 Kg6 34.Qg4 Kf7 35.Qd7 ½–½. Fournier,Frederic (1970) – Artsutaraz (1980), Active (2/0), 2005.

4.bc5 e6 5.d4 Nc6 6.e3 Be7 7.Nf3 Nd7 (7...b6 8.Ne5 Ne5 9.de5+=) 8.Nbd2 f5 (8...b6 9.cb6 Qb6 10.Rb1+/–) 9.Bd3 Nf6 10.0-0 Ne4 11.c4 Nd2 12.Qd2 dc4 (12...Na5 13.cd5 Nb3 14.Qb4 Na1 15.Qa4 (15.Ra1?! ed5 16.Bb5 Kf7+/–) 15...Kf7 16.Ne5 (16.Ra1?! ed5 17.Ne5 Kf6+/–; 16.Ba1?! ed5 17.Ne5 Kf6+/–) 16...Kg8 17.d6+- (17.Ba1 ed5 18.Bc3 Be6+/–; 17.Ra1?! ed5 18.Rc1 Be6+/–)) 13.Bc4 g5? (13...0-0 14.Rfd1+-) 14.h3?? (better is 14.d5 ed5 15.Bd5+- (15.Bh8?! dc4 16.Qc3 Qd5+-)) 14...g4+/– 15.hg4 fg4 16.Nh2 h5 17.g3 Qc7 18.Rfb1 Bd7 19.Bf1 0-0-0 20.Bg2 Rdf8 21.Nf1 h4 22.Qe1 hg3 23.Ng3 Bh4 24.Qe2?? Bg3-+ 25.fg3 Ne7 26.Rf1 Rf1 27.Rf1 Bc6?? 28.Bc6 Qc6?? 29.Qg2 Qg2 30.Kg2 Nd5 31.Bc1 Ne3?? 32.Be3 Kc7 33.Re1 Kc6 34.Bf2 Kd5 35.Rd1 Ra8 36.Bg1 a5 37.Rf1 Ra6 38.Ra1 b6 39.cb6 Rb6 40.a4 Rc6 41.Bf2 Rc4 42.Re1 (42.Re1 Ra4 43.Re5 Kd6 44.Rg5+-) 1–0. Fournier,Frederic (2020) – jafelle2 (2050), Active Blind, 2007.

4.d4 Bf5 5.e3 e6 6.c4 Be4 (6...Bd6 7.Nd2=+) 7.Nf3 Bb1 8.Rb1 Bd6 9.Qc2 0-0 10.c5 Bc7 11.Qd2 (11.Bd3 Nbd7+=) 11...b6 12.Bd3 b5 13.Bc2 Ne4 14.Qd3 f5 15.Nd2 (better is 15.0-0=) 15...f4?? (better is 15...a5-/+) 16.f3?? (better is 16.Ne4 fe3 17.Qe3+-) 16...fe3 (better is 16...Qh4 17.Ke2 Qf2 18.Kd1 Qg2-+) 17.fe4 (17.Ne4 A) 17...de4? 18.Qe4 (18.Qe3?! ef3 19.0-0 Qh4=; 18.fe4 Qh4 19.Kd1 e2 20.Kd2 Qg5 21.Kc3 Qg2-+) 18...Qg5 19.Qh7 Kf7 20.g3+-; B) 17...Qh4 18.g3 de4 19.gh4 ed3 20.Bd3 Rf3=) 17...ed2 18.Kd2 Qg5 19.Kc3 Nd7 (19...e5 20.Kb3 Qg2 A) 21.de5?? Rf3 22.Qf3 Qf3 23.Ka2 a5 24.ed5 cd5-+ (< 24...Qd5 25.Bb3+/–); B) 21.Rbg1 de4 22.Rg2 ed3 23.Bd3=) 20.e5 Qg6?? (20...Qh4 21.Rhf1=) 21.Qe2?? (better is 21.Qg6!? hg6 22.a4+-) 21...Qh6 (21...Qe8 22.Qd3 Qh5 23.h4+=) 22.Bc1 (22.h4 g6 23.Bc1+/–) 22...Qh4= 23.g3 Qh3 24.Rf1?? (better is 24.Kb2=) 24...Rf1-+ 25.Qf1 (25.Be3 Rff8 26.Kb2-+) 25...Qf1 26.Bd2 (26.Bd3 Qf2 27.Rb2 Qe1 28.Bd2 Qa1-+) 26...Qf3 (27.Bd3 a5-+; better is 26...Qc4!? 27.Kb2 Qd4 28.Bc3-+) 0–1. slavisa99 – SirCharles, Live Game Caissa's Web, 2004.

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a3).

4.e3 Bf5 5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 Bf5 5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

4.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6 4.a3).

4.c3 e5 5.cd4 ed4 6.d3 a6 (6...c5 7.bc5 Bc5 8.Nd2-/+) 7.Nf3 (7.e4 de3 8.Qe2 Ng4-/+) 7...Nc6 8.h3 (8.Nbd2!?=) 8...Bg4?? (better is 8...Be6=+) 9.hg4+- (9...Ng4 10.Qa4+-) 1–0. PoPer – ross60, Live Game Caissa's Web, 2004.

4.d3 e5 5.Nd2 (---> 1.b4 e5 2.a3 d5 3.Bb2 d4 4.d3 Nf6 5.Nd2).

4.e3 de3 5.fe3 Bg4 (5...a5 6.b5=) 6.Be2+= Be2 7.Qe2 e6 (8.Qb5 Nbd7 9.Qb7 Be7+/–; 7...Nbd7 8.Nf3+=). tirpitz (2085) – hsingletary (2155), net–chess.com, 2006.

4.Nf3 Nc6 5.b5 Na5 6.Nd4 Nc4+= 7.Bc3 Ne4 (7...e5 8.Nf3 e4 9.Nd4+=) 8.e3+- Nc3 9.Nc3 g6?? (better 9...Nd6+-) 10.Bc4+- Bg7 11.Nce2 (11.Qf3 0-0 12.Nb3 Rb8+-) 11...0-0 12.0-0 a6 13.ba6 ba6 14.c3 Bb7 15.Nf4 (15.Rb1 Rb8+-) 15...a5 (15...e5 16.Nfe6! fe6 17.Ne6+-) 16.Be2 (16.Rb1 Ba6 17.Qa4 Bc4 18.Qc4 Kh8+-) 16...a4 (16...e5 17.Rb1 Bc8+-) 17.Bf3 Qc8 (17...Bf3 18.Qf3 (18.gf3?! Qd6+-) 18...e5 19.Nc6+-) 18.Bb7 (18.Nd5!? Bd5 19.Bd5 Ra6+-) 18...Qb7 19.Qf3 (19.Rb1 Qa6+-) 19...Qb6 (19...Qf3 20.Nf3 (20.gf3?! e5+-) 20...Rfb8 21.Rfb1+-) 20.Rab1 (20.Nc6 e6+-) 20...Qf6 (20...Qd6 21.Nb5 Qd7 22.Qb7+-) 21.Nd5 Qd6 22.Nb5 Qc5 (22...Qd7 23.Nbc7 Rab8 24.Rb8 Rb8 25.Na6+-) 23.d4 Qc4 24.Ne7 Kh8 25.Qd5 (25.Nd5 Rad8 26.Ndc7 Qa2+-) 25...Qe2 (25...Qd5 26.Nd5 c6+-) 26.Nc7 Rad8 27.Qf3 (27.Qc6 Qc2+-) 27...Qc4 (27...Qa2 28.Nb5+-) 28.Ncd5 Rd7 (28...Rb8 29.Rb8 Rb8 30.Qf7+-) 29.Rb4 (better 29.Nb6 Qe6 30.Nd7 Qd7+-) 29...Qa6 30.Rfb1 Rdd8 (30...Qd6 31.Qg3 Qg3 32.hg3+-) 31.c4 h5 (31...Qe6 32.Rb6 Rd6 33.Qd1+-) 32.c5 h4 (32...Qd3 33.c6 Rde8 34.c7+-) 33.c6 (better 33.Qf4 g5 34.Qg5 Qh6 35.Qh6 Bh6+-) 33...Qd3 (33...Rd5 34.Qd5 Qe2 35.Qg5+-) 34.h3 (better 34.c7 Ra8+-) 34...Rfe8 35.c7 (35.Qf7 Re7 36.Qe7 Rd5 37.Rb8 Kh7 38.R1b7 Qd1 39.Kh2 Qd4 40.ed4 Kh6 41.Qg7 Kg5 42.Qe7 Kf4 43.Qe3 Kf5 44.Rf8) 35...Rd5 36.Nd5 Rc8 37.Rb8 Kh7 38.Qg4 Rb8 39.cb8Q (39.Qh4 Bh6 40.Rb8 Qb1 41.Kh2 Qh1 42.Kh1 g5 43.Rh8 Kg6 44.Rh6 Kg7 45.Qg5 Kf8 46.c8Q) 39...Qa3 (39...Bf8 40.Qh4 Kg7 41.Qf8 Kf8 42.Qh8) 40.Qh4 Bh6 41.Nf6 Kg7 42.Qe5 (42.Qe5 Qe3 43.Nh5 Kh7 44.Qg7 Bg7 45.Nf6; 42.Qg8) 1–0. alddhsfd (1800) – HuGokuSan (1800), lichess.org, 2019.

4.Nf3 e6 5.e3 c5 6.bc5 Bc5 7.Nd4 Nc6 8.Nc6 bc6 9.Qf3 Bb7 10.Bd3 h5 11.Nc3 Bd6 12.Ne4 c5?? (better is 12...Ne4 13.Be4 Kf8+-) 13.Bf6 (13.Nd6?! Qd6 14.Bb5 Kf8 15.Qb7 Rb8 16.Qa7 Rb5+-) 13...Qb6 (13...gf6 14.Nd6 Qd6 15.Qb7 Rb8 16.Qa7 0-0+-) 14.Nd6 Qd6 15.Qb7 Rb8 16.Be7! Qe7 (16...Qe7 17.Bb5 Double attack (17.Qb8 Deflection)) 17.Bb5 Kf8 18.Qb8 1–0. capablancaven (2130) – johnbaptist, gameknot.com, 2011.

(--> 1.b4 e5 2.a3 d5 3.Bb2 Nf6).

4.e3 (---> 1.b4 e5 2.a3 d5 3.e3 Nf6 4.Bb2).

(--> 1.b4 d5 2.Bb2 Bg4 3.a3 Nf6).

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.a3).

4.b5 e6 5.e3 Bd6 6.Nf3 0-0 7.Be2 h6 8.Ba3 (8.0-0 a6=) 8...c5=+ 9.h3 a6 10.Bb2 c4 (10...ab5 11.ab5 Ra1 12.Ba1=+) 11.0-0 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.Qc1 (14.d3 cd3 15.cd3 e5=+) 14...Qa5 15.Nc3 Rc8 16.Bb2 e5 17.Bd1 (17.Nh4 Be6=+) 17...Ra8 18.Be2 Qb6 Black plans d4 19.Rd1 (19.Re1 Be6-/+) 19...Rc8 (19...d4 20.ed4 ed4 21.Nd5 Nd5 22.Bc4-+) 20.Ba3 (20.Re1!?=+) 20...Ba3-+ 21.Qa3 Bc2 22.Ra1 d4 23.ed4 ed4 24.Qb2 d3 25.Bd1 Bd1 26.Nd1 Nc5 27.Nc3 Nce4 28.Nd1 Ng3 (28...Rc5 29.Ne3-+) 29.Ne3 Ne2 30.Kf1 c3 (30...Rc5 31.Qb4 Ne4 32.Qa5 Qa5 33.Ra5-+) 31.dc3 Rc3 32.Ne1 (32.Ne5 Qd4 33.Nf3 Qc5-+) 32...Ne4-+ The mate threat is N4g3 33.Nd3 N2g3! Black is in command 34.fg3 Theme: Deflection from e3 34...Qe3 Theme: Double Attack. Threatening mate: Nxg3 35.Nf2 Ng3 36.Kg1 Ne4 37.Kf1 (37.Rf1 Qc5 38.Qe2 f5-+) 37...Nf2 (better 37...Rc5!? 38.Ne4 Qe4 39.Qa3-+) 38.Qf2 Do you see the mate threat? 38...Rc1 (38...Qf2 39.Kf2 Rb3 40.Ra5-+) 39.Rc1-/+ Qc1 40.Qe1 Qe1 41.Ke1 Kf8 42.Kd2 Ke7 43.Kd3 Kd6 44.Kd4? (better 44.Kc4-+) 44...f5 45.g3 (45.Kc4 g5 46.Kd4 h5-+) 45...b6 46.g4 (46.h4 g5 47.hg5 hg5 48.Kc4-+) 46...fg4 47.hg4 g6 48.Ke4 h5 (48...h5 49.g5 Kc5-+) 0–1. Djakovic,Ilija (1705) – Ljikar,Z (2190), 23rd Bosnjaci Open, 2018.

4.d3 e6 5.b5 c6 6.c4 (6.Nf3 Bb4 7.Nbd2 0-0=+) 6...Bb4 7.Bc3 Qa5 8.Bb4 Qb4 9.Qd2 Qd2 (9...a5 10.Qb4 ab4 11.Nd2-/+) 10.Nd2 0-0 11.Ngf3 Nbd7 12.Nh4 Bg6 13.Ng6 hg6 14.e3 Rfc8 15.d4 c5 16.cd5 Nd5 17.dc5 Nc5 18.Bc4 (18.a5 Rc7=) 18...Nb4 (18...Nb6!? 19.Ke2 Nca4=+) 19.0-0 (19.Ke2 a5+=) 19...a5 20.Rfc1 b6 21.Nb3 Nb3 22.Bb3 (22…Rd8 23.h3+=) 1–0. b4_player (1880) – stoffl (1985), GameColony.com, 2002.

4.e3 Bg7 5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.Nf3 Bg7 5.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.h3 Bg7 5.g4 0-0 6.Bg2 Nbd7 7.Nf3 b6 8.d3 c5 9.bc5 Nc5 10.g5 Nh5 11.Bg7 Ng7 12.Ne5 Bb7 13.0-0 Nf5 14.d4 Ne4 15.f3? (better is 15.a5+=) 15...Ne3-+ (worse is 15...Ng5 16.Qd3-/+) 16.Qd3 (16.Qc1 Nf1 17.Bf1-+) 16...Nf1 17.Kf1 Ng3 (17...Ng5!? 18.f4 Ne4 19.Nd2-+) 18.Kf2 Nf5 19.e4 (19.Kg1-+) 19...de4 20.fe4 Qd4 21.Qd4 Nd4 22.c3 Nb3 23.Ra3 Nc5 24.Ke3 Rad8 25.Nd2 (25.a5 f6 26.ab6 ab6 27.gf6 ef6-+) 25...f6 26.gf6 ef6 (26...Rf6?! 27.Nb3-+) 27.Nef3 Rfe8 28.Nd4 f5 29.Kf4 (29.a5 Be4 (29...fe4?! 30.ab6 ab6 31.Nc4-+) 30.Ne4 Ne4 31.Be4 Re4 32.Kf2 ba5 33.Ra5 Rc8-+) 29...Ne4 30.Ne4 Be4 31.Bf1 Bb7 32.Bc4 (32.a5 Re4 33.Kg3 Re3 34.Kf2 f4-+) 32...Kh8 33.Bf7 (33.Bd3 Kg7 34.h4 Kf6-+) 33...Re4 34.Kg3 Re3 35.Kh4 Rd4! (35...Rd4 36.cd4 Ra3-+) 0–1. spensley – jeronimofuentes (1685), gameknot.com, 2013. (=1.a4 d5 2.b4 g6 3.Bb2 Nf6)

4.a4 a6 5.e3 ab5 6.ab5 Ra1 7.Ba1 e5 8.Bb2 (8.ed4 ed4 9.Bc4 Qe7 10.Qe2 c5=) 8...Bc5=+ 9.Ba3 (9.Nf3 Qd6=+) 9...Ba3 (9...Qd6! 10.Bc5 Qc5-/+) 10.Na3=+ 0-0 (better 10...Qd5=+) 11.g3? (11.Nf3 de3 12.fe3 e4=+) 11...c6 (11...Qd5 12.Nf3-+) 12.Bg2 (12.Nf3 Qd5 13.Nc4 Nbd7 14.bc6 bc6-/+) 12...cb5 (12...Qa5!? 13.Nc4 Qb5 14.Nd6-/+) 13.Nb5-/+ Qa5 14.Qb1 Nc6 15.Bc6?? (better 15.Ne2-/+) 15...bc6-+ 16.Nd6 Ba6 (16...de3 17.fe3 Qd5 18.Nf3-+) 17.Ne2 (17.e4-+) 17...de3 18.fe3 Rd8 (better 18...Qd5 19.0-0 Qd2-+) 19.Nf7 (19.Nc3 Rd6 20.Qa2-+) 19...Qd2 20.Kf2 Qe2 21.Kg1 Kf7 22.h3 (22.Qb3 Kg6 23.c4 Ne4 24.Qc2 Qc2 25.h3 Rd1) 22…Rd1 (22...Rd1 23.Qd1 Qd1 24.Kg2 Qe2 25.Kg1 Ne4 26.Rh2 Qf1; 22...Qe3 23.Kg2 Rd2) 0–1. invictus31 – Dehau (1610), lichess.org, 2018.

4.Nf3 c5 5.bc6 Nc6 6.h3 (6.e3 e5+=) 6...e5+= 7.e3 de3 8.fe3 Qc7 9.Qe2 (9.Bb5 e4 10.Ne5 Bd6 11.Nc6 bc6-/+) 9...Bd6 10.e4 a6 (10...Nb4 11.Na3 Nc2 12.Nc2 Qc2 13.Be5 Be5 14.Ne5-/+) 11.c3 (11.Nc3 0-0-/+) 11...Be6 12.Na3 h6 13.Nc4 Bc5 14.Ne3? (better is 14.d4 Nh5 15.Rg1-/+) 14...Ne4-+ 15.Rg1 Ng3 16.Qf2 Nf1 17.Rf1 0-0-0 (17...e4 18.d4 Bd6 19.Ne5 Be5 20.de5 Ne5 21.Qc2 Nd3 22.Ke2-+) 18.Ke2? (18.Qh4 f5-+) 18...f6 (18...Bc4 19.Ke1 Be3 20.de3-+) 19.Qh4? (19.d4 ed4 20.cd4 Bd4 21.Bd4 Nd4 22.Nd4 Bc4 23.Nc4 Qc4 24.Kf3 Rd4 25.Rac1 Rd3 26.Qe3 Re3 27.Ke3 Re8 28.Kf3 Qc6 29.Rc6 bc6 30.Rc1-+) 19...g5 (19...Be3 20.de3 Bc4 21.Kf2 Bf1 22.Rf1-+) 20.Qa4 Be3 21.de3 h5 (better is 21...Bc4! 22.Kf2 Bf1 23.Rf1-+) 22.Nd2 f5 23.c4 (23.Rad1 f4 24.ef4 gf4-+) 23...Rhf8 (better is 23...Qd7 24.Qc2 Nb4-+) 24.Nf3?? (better is 24.Rfd1-+) 24...g4 (24...Bc4 25.Qc4 Nd4 26.Qd4 Qc2 27.Nd2 ed4 28.Rfc1 d3 29.Ke1-/+) 25.hg4 (25.Nd2 f4 26.e4 gh3 27.gh3 Bh3-+) 25...hg4 (better is 25...fg4!? 26.c5 Qd7 27.Rfd1 gf3 28.gf3-+) 26.Nd2 Qd6 27.Rad1 (27.Qc2 Nb4 28.Qc3 Na2 29.Ra2 Qd2 30.Qd2 Bc4 31.Ke1 Rd2 32.Kd2 Ba2 33.Be5-+) 27...Qd3 28.Kf2 g3 29.Kg3 Qe3 30.Rf3 Qg5 (30...f4 31.Kh2 Rh8 32.Rh3 Bh3 33.Qc6 bc6 34.gh3 Qf2 35.Kh1 Rh3) 31.Kh2-+ Rd2 32.Rd2 Qd2 33.Qa3 Rh8 34.Rh3 Rh3 35.Kh3 Qh6 (35...f4 36.Kh2 f3 37.Qf3 Qb2 38.a3-+) 36.Kg3 f4 37.Kf2 Qh4 38.Kg1 Qe1 39.Kh2 Qg3! 40.Qg3 0–1. zabazaba (1630) – ogucis, gameknot.com, 2014.

4.Nf3= c5 5.e3 de3 6.fe3 e6 (6...Bg4 7.Be2+=) 7.Be2 Bd6 (7...Be7 8.0-0+=) 8.0-0 0-0 9.d3 (9.Na3 Bd7+=) 9...Nd5 (9...a6 10.Na3=) 10.Qd2+= Nd7 11.c4 (11.Na3 Bc7+=) 11...N5f6 12.a4 b6 (12...Re8 13.Nc3=) 13.a5 += Bb7 =. algernon (2345) – jparkinson (2380), net–chess.com, 2008.

4.Nf3 d3 5.cd3 (5.ed3 a6+-) 5...Bg4 6.h3 Bf3 7.ef3 (better 7.gf3!? e6 8.Bg2+=) 7...e6= 8.Be2 Nd5 9.0-0 (9.Qa4 Nd7=) 9...Bd6 (better 9...Qg5=+) 10.Bg7?? (better 10.Nc3=) 10...Rg8-+ 11.Bb2 (11.Nc3-+) 11...Qg5 (11...Rg2 12.Kg2 Qg5 13.Kh1 Qf4 14.Be5 Be5 15.Rg1 Qh2) 12.g3 (12.g4 Qf4 13.Be5 Be5 14.Re1 Qh2 15.Kf1 Qh1) 12...Bg3! 13.f4 (13.fg3 Qg3 Mate attack) 13...Bf2! (13...Qf4?! 14.Kh1 Bf2 15.Bg4-+) 14.Kh1 (14.Kf2 Qg3 Mate attack) 14…Qg2 0–1. AhmedSultanov – Vegeta14, lichess.org, 2019.

4.e3 a6 5.Be5 ab5 6.Bb5 c6 7.Be2 (7.Bd3=) 7...c5 (7...Nbd7!? 8.Bd4 Bd6=) 8.Nf3 (8.Bf6 gf6 9.Nc3 Rg8 10.Bb5 Nc6+-) 8...Nc6 9.Bb5 (9.Bf6 gf6 10.0-0 Be6+=) 9...Ra5 (9...Be7 10.Nc3=) 10.a4 Bd7 (10...Be7!?+=) 11.Bc3 Nb4 12.0-0 (12.Bf6 gf6 13.Nc3 Bd6+-) 12...Bb5+= 13.ab5 Ra1 (13...Be7!?+=) 14.Ba1+- Qa5 (14...c4!?+-) 15.Bf6+- gf6 16.Nc3 Rg8 (16...Be7 17.d4 Qc7 18.e4 de4 19.Ne4+-) 17.Nh4 Bd6 (17...Qd8 18.f4+-) 18.Nf5 Qc7 (18...Qd8 19.Qh5+-) 19.f4 Qd7 (19...Rg6 20.Qh5 Bf8 21.Ra1+-) 20.Qh5 Rg5 (20...Kd8 21.Nd6 Qd6 22.Qf7 Re8 23.Qb7 Qc7 24.Qa8 Kd7+-) 21.fg5 fg5 22.Nd6 Qd6 23.Qf7 Kd8 24.Qg8 Kc7 25.Rf7 Kb6 26.Qc8 Ka5 27.Qa8 Kb6 (27...Qa6 28.ba6 d4 29.ab7 Na6 30.Rf6 c4 31.b8Q dc3 32.Qa6) 28.Rb7 1–0. GuestLGWZ – GuestGSGJ, freechess.org, 2019.

4.e3 Bd6!?+=.

4.e3 Bd7 5.a4 c5 (better 5...Bd6!?=+) 6.Be5+= Qe7 (6...Bf5 7.Nf3+=) 7.Bb8 (7.Nf3 Bg4 8.Bb2 Qe6+-) 7...Rb8+= 8.c4 b6 (8...Be6 9.Nf3=) 9.Nc3 (9.Nf3 Be6+=) 9...dc4 (9...d4!? 10.Nce2 de3 11.de3 Rd8+=) 10.Bc4+- Be6 11.Qb3 Bc4 12.Qc4 Rd8 (12...Qd8 13.Nf3+-) 13.Nf3 Qd7 14.0-0 Be7 15.d4 0-0 16.dc5 (16.Rfd1 Bd6+-) 16...Bc5 17.Rad1 (17.Ne5 Qc7 18.Nc6 Rd2+-) 17...Qe7 18.Nd5 Nd5 19.Rd5 Rde8 (19...Rd5!? 20.Qd5 Rd8+-) 20.Ne5+- Rd8? (20...Rc8 21.Nc6 Qe6 22.Rfd1+-) 21.Rfd1 (better 21.Nc6 Qc7 22.Nd8 Rd8 23.Rfd1 Rd5 24.Qd5+-) 21...Rd5 22.Rd5 (better 22.Qd5 Qg5 23.a5+-) 22...Rd8?? (22...Qe6 23.Qd3 Re8 24.Nc6+-) 23.e4 (better 23.Nc6 Qd6 24.Nd8+-) 23...Rd5 (23...Re8 24.g3+-) 24.Qd5+- g6 25.g3 (25.Nc6 Qf6 26.Qd8 Qd8 27.Nd8 Kg7+-) 25...Kg7 (25...Qf6 26.Nd3 Qa1 27.Kg2+-) 26.Nd3 h5 (26...Bd6 27.e5 Ba3 28.h3+-) 27.Qe5 (better 27.a5 Ba3 28.a6+-) 27...Kf8?? (27...f6 28.Qe7 Be7 29.f4+-) 28.Qb8 (28.Qh8) 28...Kg7+- 29.Qe5 f6?? (better 29...Kf8 30.Qh8) 30.Qe7+- Be7 31.f4 f5 (31...Kf7 32.Kf2+-) 32.e5 Kf7 33.Kf2 Bc5?? (better 33...Ke6+-) 34.Nc5 bc5 (34...Ke7 35.Na6 Ke6 36.Nb8+-) 35.Ke3 (better 35.a5 Ke7 36.b6 ab6+-) 35...Ke6 36.Kd3 (36.a5 Kd7 37.b6 ab6 38.ab6 Kc6+-) 36...g5 (36...Kd5+-) 37.Kc4 gf4 38.gf4 h4 39.h3 a5 40.ba6 Kd7 (40...Kf7 41.a7 Kg7 42.a5 Kg6 43.a8Q Kf7 44.Qb7 Kg6 45.e6 Kh6 46.e7 Kg6 47.e8Q Kh6 48.Qe6 Kh5 49.Qbf7) 41.Kc5 (41.a7 Ke8 42.a8Q Kf7 43.Qb7 Kg6 44.e6 Kh6 45.e7 Kg6 46.e8Q Kh6 47.Qe6 Kh5 48.Qbf7) 41...Kc7 (41...Ke6 42.a7 Kd7 43.a8Q Ke7 44.Qg8 Kd7 45.Qf7 Kd8 46.Kc6 Kc8 47.Qe8) 42.Kb5 (42.e6 Kd8 43.Kd6 Ke8 44.a7 Kf8 45.a8Q Kg7 46.e7 Kh7 47.e8Q Kg7 48.Qg2 Kf6 49.Qe6) 42...Kb8 (42...Kd7 43.a7 Ke8 44.a8Q Kf7 45.Qb7 Ke6 46.Qc7 Kd5 47.Qc4) 43.e6 (43.e6 Kc7 44.Kc5 Kd8 45.Kd6 Ke8 46.a7 Kf8 47.a8Q Kg7 48.e7 Kh7 49.a5 Kg7 50.Qg2 Kf6 51.e8N Kf7 52.Qg7 Ke8 53.Qe7; 43.a5 Kc7 44.a7 Kd8 45.a8Q Ke7 46.Qb7 Kd8 47.e6 Ke8 48.Qd7 Kf8 49.Qf7) 1–0. afsharian – marcosdavinomatias (1620), lichess.org, 2019.

4.e3 Bd7 5.Be5+= a6 6.a4 ab5 (6...Be7 7.Nf3+=) 7.ab5+/– Qe7?? (better is 7...Ra1 8.Ba1 Bf5+=) 8.Ra8+- (8.Ra8 Qe5 9.Rb8 Ke7 10.Rb7+-) 1–0. Janek – Gustave, internet, 2016.

4.e3 e6 5.Nf3 c5 6.c4 Be7 7.a4 0-0 8.Be2 a6 9.0-0 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.Nc3 Nb6 13.Qb3 (13.d3 Qd6=) 13...Bd7 (13...Nc4!? 14.Bc4 dc4 15.Qc4 b6=+) 14.Ne5 Be8 15.f4 Qc7 (15...Nc4 16.Nc4 dc4 17.Qc2=) 16.Bb2+= Ne4 (16...Nc4 17.Nc4 dc4 18.Qc4+=) 17.Ne4+- (17.cd5? Nd2 18.Qd1 Nf1 19.Bf1 f6-+) 17...de4 18.Qc2 f5 (18...f6 19.Ng4 Bg6 20.Nf2+-) 19.Ra1 Bf6 20.Ra7 (20.d3 Nd7 21.Nd7 Bb2 22.Qb2 Bd7 23.de4 fe4+-) 20...Nc8 21.Ra8 (21.Ra3 Ne7+=) 21...Nd6 (21...Nb6 22.Ra3+=) 22.g4 (22.Bc3 Bf7 23.Ra7 Nc8+-) 22...b6 23.gf5 ef5 24.Qa4 Nc8 25.Bc3 Be5 (25...Bf7 26.Qa6+=) 26.Be5+- Qd7 27.Qa1 (better 27.Qd1+-) 27...Rf7?? (27...Qd2 28.Kf2 Bh5 29.Ra2+=) 28.Bh5 (better 28.Qa6 Qd2 29.Kf2+- (29.Qc8?! Qe1 30.Bf1 Qe3 31.Kg2 Qf3 32.Kg1 Qe3 33.Kh1 Qf3 34.Kg1 Qe3=; 29.Rc8?! Qe1 30.Bf1 Qe3 31.Kh1 Qf3 32.Kg1 Qe3 33.Kh1 Qf3 34.Kg1 Qe3=)) 28...Re7= 29.Be8 Qe8 0–1. GuestMZDM – Frele, freechess.org, 2019.

4.Nf3 e6 5.e3 c6 6.a4 cb5 (6...Bd6 7.Be2=) 7.ab5 a6 8.c4 dc4 9.Bc4 ab5?? (better 9...Bd6=) 10.Ra8+- bc4 11.Rb8 Bd7 (11...Bd6 12.Bf6 gf6+-) 12.Rd8 Kd8 13.Ne5 c3 (13...Ke8 14.Qf3 Bc8 15.Nc4+-) 14.dc3 (better 14.Nf7 Ke8 15.Nh8 cb2+-) 14...Bb4 15.cb4 (15.Nf7 Kc8 16.cb4 Rf8 17.Nd6 Kd8 18.Nb7 Kc8+-) 15...Ng4 16.Qd7 1–0. DEFFM – GuestWSMX, freechess.org, 2018.

4.Nc3 Nc6 5.b5 Nb8 (5...Nb4!?-/+) 6.e4= e5 7.Bc4 Bc5 8.Nf3 White threatens to win material: Nf3xe5 8...0-0 9.Nd5 (better 9.Qc2!?= is a viable option) 9...Ne4-/+ 10.d4 Bd4 (10...ed4 11.Bd4 Bg4 12.Bc5 Nc5 13.0-0-/+) 11.Bd4 (11.Nd4 Nd6 (worse 11...ed4 12.Qd4 Nf6 13.Nf6 Qf6 14.Qf6 gf6 15.Rc1+=) 12.Be2 ed4 13.Qd4 Nf5=+) 11...ed4-/+ 12.Qd4 Nd6 13.0-0-0 Nc4 14.Qc4 Qe8?? simply marches past the door to victory (better 14...c6 15.bc6 Nc6-+) 15.Nc7+- Be6 16.Qc2?? Black has a cramped position. letting the wind out of his own sails (16.Ne8 Bc4 17.Nc7+-) 16...Qe7= 17.Qe4?? White is ruining his position (better 17.Na8 is just about the only chance 17...Rc8 18.Qc8 Bc8 19.Nd4=) 17…Qa3 (17...Qa3 18.Kc2 Rc8-+) 0–1. AvImd (1760) – Tregart (1830), lichess.org, 2020.

4.e3 Nc6 5.Bc4 e5 (5...Nb4!? 6.Qa4 Nc6=+) 6.b5 Ne7 (better 6...Nb4!? 7.a3 Be6=) 7.Be5+- Ng6 8.Bb2 (8.Nf3 Bg4 9.Bd4 Bd6+-) 8...Be7 (8...Nh4 9.Qb3 Qe7 10.g3+=) 9.Qb3 0-0 10.Nc3 (10.Nf3 Bg4+-) 10...b6 (10...Nh4 11.Kf1+=) 11.Nf3 (11.Nd5 Nd5 12.Bd5 Rb8+-) 11...Bb7 (11...a6 12.a4+=) 12.h4 (12.d4 Bf3 13.gf3 a6+-) 12...Bf3 13.gf3 Bc5 (13...a6 14.d4+-) 14.h5 (14.Ne4 Ne4 15.fe4 Be7+-) 14...Ne5+- 15.Ne4?? (better 15.Be2 Ned7 16.d4+-) 15...Nc4?? (better 15...Nf3 16.Ke2 Ne4-+) 16.Qc4 (16.Nf6!? Kh8 17.Qc4 gf6+-) 16...Ne4 (16...Be7 17.Rc1+-) 17.Qe4 (17.fe4 Be7+-) 17...Qg5 (17...Re8 18.Qg4 f6 19.Rg1+-) 18.0-0-0 h6?? (better 18...Qh6+-) 19.Rhg1 Qf6 (19...a6+-) 20.Bf6 g6 (20...Ba3 21.Kb1 Be7 22.Rg7 Kh8 23.Qh7) 21.Rg6! fg6 (21...fg6 22.Qg6 Mate attack) 22.Qg6 1–0. Agiant – Jamesrhee1, lichess.org, 2021.

4.e3 Qd6 5.a3 e5 6.Bc4 Be6 7.Be2 Nbd7 (7...Bd5 8.Nf3 e4 9.Nd4=) 8.Nf3 0-0-0 (8...a5 9.Nc3 e4 10.Nd4=) 9.Ng5 (9.Nc3 c6+=) 9...h6 (9...Bd5 10.Nc3 Bg2 11.Rg1=) 10.Ne6+= Qe6 11.Qa4 Kb8 12.b5 (12.0-0 Bd6=) 12...Nb6 13.Qc2 g5 (13...Bd6 14.e4=) 14.a4 (14.0-0 Nfd5+=) 14...Nfd5 (better is 14...Nbd5!?=) 15.a5+/– Nb4 16.Qc3 N6d5 17.Qb3?? (17.Qc1 Bd6+=) 17...Bc5 (17...Ne3 18.Qe3 Nc2 19.Kf1 Ne3 20.fe3-+) 18.b6?? (18.Qc4 Bd6+/–) 18...cb6 (18...Ne3 19.bc7 Kc7 20.Be5 Qe5 21.fe3 Qa1 22.0-0-+) 19.ab6?? (19.0-0 Rhe8+=) 19...a6?? (better is 19...Ne3 20.Be5 Qe5 21.ba7 Ka8 22.fe3 Qa1-+) 20.Nc3?? (20.0-0 Rhe8 21.Na3 Qb6+-) 20...Bb6 (better is 20...Ne3 21.Qb4 Ng2 22.Kf1 Bb4-+) 21.Nd5 Nd5 22.Ba6?? ba6-/+ 23.0-0 Ka7 24.d4 ed4 25.Bd4? Nc7?? 26.Bb6 Qb6 27.Qf7 Rhf8 28.Qe7 Rde8 29.Qd7 Rd8 30.Qg7 Rg8 31.Qe7 Rde8 32.Qa3 h5 33.Rfb1 Qc6?? 34.Rc1+- Qd6?? 35.Qd6 Rg7 36.Qf6 (36…Rg6 37.Qg6 Re6 38.Rc7 Kb8 39.Qe6 Kc7 40.Rc1 Kb7 41.Qc6 Ka7 42.Rb1 g4 43.Qb7#; 36.Rc7 Ka8 37.Qa6 Kb8 38.Qb6) 1–0. FrutiniMalini – BANZAI, Caissa's Web, 2004.

4.e3 g6 5.Bc4 Bg7 6.Nf3 Nh5 (better 6...0-0!?=) 7.Bg7+/- Ng7 8.0-0 0-0 9.Qb3 Nd7 10.a3 Nb6 11.Be2 c6 12.Nc3 Be6 13.Qb2 Nc4 The backward pawn on d2 becomes a target 14.Bc4 Bc4 15.Rfd1 Bd3 16.Ne5 e6 17.Rac1 Nf5 18.Na4 Be2 19.Re1 Bb5 (19...Bh5!? 20.Nc5 f6+/-) 20.Nc5+- Qf6? (20...f6 21.Nf3 (21.Ne6?! Qd6 22.e4 Qe6 23.ef5 Qf5+=) 21...e5 22.a4+-) 21.Ncd7 (better 21.a4!? Ba4 22.Na4 Qe7+-) 21...Qe7 22.Ng4 f6 (22...Ng7 23.Ngf6 Kh8 24.Nf8 Rf8 25.Qe5+-) 23.Ndf6 Rf6 24.Qf6 Qf6 25.Nf6 Kf7 26.Ne4 Rd8 27.Nc5 Rd2 (27...b6 28.Ne4+-) 28.e4 Nd4 29.Nb7?? (better 29.Rcd1 Ne2 30.Kh1 Rd1 31.Rd1+-) 29...Ne2+/- 30.Re2! Re2 (30...Be2 31.f4 Combination; 30...Re2 31.Nd8 Double attack) 31.Nd6 Kf6 32.Nb5 cb5 33.g3 Ra2 34.Rc7 Ra3 35.Rb7 Ra4 36.Rb6?? (better 36.Rb5 a6 37.Rb6+=) 36...Rb4 (better 36...ab6 37.Kf1 Rb4-+) 37.Rb7 Rb1 (better 37...a5!? 38.f4 a4 39.g4-+) 38.Kg2 b4?? (38...a5 39.f4 h5-/+) 39.Ra7= b3 40.Rb7 b2 41.h4 (41.Rh7?? Rg1!? 42.Kg1 b1Q 43.Kg2 Qe4 44.Kg1 g5-+) 41...Rc1 42.h5?? (better 42.Rb2 Rc4 43.f3+=) 42...b1Q-+ 43.f4 (43.Rb1 Rb1 44.hg6 hg6 45.f4-+) 43...Qb7 (43...Qe4 44.Kf2 Rc2 45.Kg1 Qg2) 44.Kh3 (44.f5 Qe4 45.Kf2 Rc2 46.Kf1 Qh1) 44...Qe4 45.Kh4 (45.hg6 Rh1 46.Kg4 Qe2) 45...Qf5 (45...Rh1 46.Kg4 gh5) 46.g4 Qf4 47.h6 (47.Kh3 Qf3 48.Kh4 Rh1) 47…Rh1 0-1. CaissaSoeze (2235) - Blahrrrr (2120), Rated Bullet tournament kVbh0doF, lichess.org, 2015. (=1.c4 A10: English Opening: Unusual Replies for Black 1...d5 2.b4 Nf6 3.Bb2)

4.Nf3 e5 5.a3 Bd6 6.c4 dc3 7.Bc3 Nbd7 8.Nbd2 b5 9.d4 e4 10.Ne5 Bb7 (10...e3 11.fe3 Nd5 12.Qb3 Ne5 13.de5-/+) 11.e3= Nd5 (better is 11...a6!?=) 12.Bb2+/– (12.Ne4?! Ne5 13.de5 Nc3 14.Nc3 Be5 15.Qd8 Rd8+=) 12...a6 13.Ne4 (13.Nd7 Qd7 14.Ne4 Qe6 15.Nd6 cd6+/–) 13...Qe7 (better is 13...Be5!? 14.de5 Ne3 15.fe3 Be4+=) 14.Nd6+/– cd6 15.Nd7 Qd7 16.Bd3 Rc8 17.Qh5 Nf6 (17...g6 18.Qh4 Qe7 19.Qh6+/–) 18.Qg5+- Qg4? (better is 18...Qd8+-) 19.Qg4 Ng4 20.Bf5 Rc2 (20...Nf6 21.Bc8 Bc8+-) 21.Bc2 (21.Bg4?! Rb2 22.0-0 h5+/–) 21...Bg2 (21...0-0 22.0-0+-) 22.Rg1 Bf3 23.Rg3 Nh2 24.Rh3 1–0. Fritz 11 – foreverclever, internet, 2013.

4.Nf3 e5 5.a3 Bd6 6.c4 c6 7.g3 h6 8.c5 Bc7 9.Bg2 Bg4 10.0-0 0-0 11.Nbd2 Nbd7 12.e3 de3 13.fe3 Nd5 14.Qe1 Qe7 15.e4 N5f6 16.Kh1 a5 17.Qe3 b6 18.Nh4 (Better is 18.d4!?=) 18...bc5 19.Nf5 Bf5 20.Rf5 cb4 21.a4 Ng4 22.Qf3 Ndf6 (23.Rf1 Rab8-+) 0–1. pawndynasty – The_Simple, HCL–B1646 playchess.de, 2003.

4.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.d3 Nf6).

4.Nf3 e5 5.a3 Bd6 6.c4 dc3 7.Bc3 Nbd7 8.Nbd2 b5 9.d4 e4 10.Ne5 Bb7 (10...e3 11.fe3 Nd5 12.Qb3 Ne5 13.de5-/+) 11.e3= Nd5 (better is 11...a6!?=) 12.Bb2+/– (12.Ne4?! Ne5 13.de5 Nc3 14.Nc3 Be5 15.Qd8 Rd8+=) 12...a6 13.Ne4 (13.Nd7 Qd7 14.Ne4 Qe6 15.Nd6 cd6+/–) 13...Qe7 (better is 13...Be5!? 14.de5 Ne3 15.fe3 Be4+=) 14.Nd6+/– cd6 15.Nd7 Qd7 16.Bd3 Rc8 17.Qh5 Nf6 (17...g6 18.Qh4 Qe7 19.Qh6+/–) 18.Qg5+- Qg4? (better is 18...Qd8+-) 19.Qg4 Ng4 20.Bf5 Rc2 (20...Nf6 21.Bc8 Bc8+-) 21.Bc2 (21.Bg4?! Rb2 22.0-0 h5+/–) 21...Bg2 (21...0-0 22.0-0+-) 22.Rg1 Bf3 23.Rg3 Nh2 24.Rh3 1–0. Fritz 11 – foreverclever, internet, 2013.

4.a3 Be6 5.e3 (5.Nf3 Bg4=) 5...Qd6 (5...Bg4 6.Nf3=) 6.g3 (6.Bd3 Bg4 7.f3 Bh5=) 6...0-0-0 (6...Bf5 7.Nf3=+) 7.Bg2 (7.Bd3 Bg4 8.f3 Bh5=) 7...Bg4 (7...g5 8.Ne2=+) 8.Ne2 Be2 (8...e6!?=+) 9.Qe2+= g6 (9...e6 10.c4+=) 10.0-0 (10.c4 e6+=) 10...Bh6 (10...h5 11.c4 h4 12.cd5 Nd5 13.Nc3+=) 11.Nd2 (11.c4 dc4 12.Nc3 Qd7+/–) 11...a5 (11...Bg7 12.c4+/–) 12.b5 Na7 13.a4 (better is 13.c4+/–) 13...Qb4? (13...Bg7 14.c4 h5 15.Bc3+/–) 14.Rab1?? (better is 14.Ba3 Qc3 15.Be7+-) 14...Rd7 (better is 14...Qa4 15.c4 b6+/–) 15.Ba3?? (better is 15.c4+/–) 15...Qb1?? (better is 15...Qa3 16.Nf3 Rd6-+) 16.Rb1+- Rhd8 (16...Bg7 17.c4 e6 18.cd5 Nd5 19.Rc1+-) 17.c4 (17.Nf3 Ne4 18.Qe1 b6+-) 17...b6 (17...e6 18.b6 cb6 19.cd5 Nd5 20.Nc4+-) 18.cd5 (18.Qf3 Bg7+-) 18...Nd5 19.Bd5 Rd5 20.Be7 R8d7 21.Ba3 Bg7 22.Ne4 c6 23.bc6 Nc6 24.Rb6 Kc7 25.Qa6 f5 26.Rb7 Kd8 27.Qa8 (27…Nb8 28.Qb8) 1–0. Mangoldt,H – Haufe,P, Berlin–ch U15, 1997.

4.a3 Bf5 5.e3 =+.

4.c3 e5 5.Nf3 (5.b5!? Na5 6.de5=) 5...e4-/+ 6.Nfd2 Bd6 7.e3 0-0 8.c4 (8.Be2 Be6=+) 8...Nb4-/+ 9.cd5 (9.a3!? Nd3 10.Bd3 ed3 11.Qb3-/+) 9...Nfd5 10.Bc4 (10.Nc4-+) 10...c6 (10...Qg5 11.g3 Qf5 12.Ba3-+) 11.0-0 Nd3 12.Bd5 cd5 13.Qb3 Qc7 14.Nc3? Bh2 15.Kh1 Be6 16.Nd5 Qd6?? 17.Ne4 Bd5 18.Nd6+= Bb3 19.Kh2 Bd5 20.Ba3+/– Rfd8 21.Rab1 Rd7 22.Kg3 b6? 23.Rfd1+/– Ba2 24.Rb5 Rad8 25.Rd3 Rd6 26.Bd6 Bc4 27.Bc7 Rd7 28.Re5+/– f6 29.Re8 Kf7 30.Rd8 Rc7 31.Rc3 b5 32.d5 b4? 33.Rc2 b3+/– 34.Rb2 Ke7= 35.Rh8 h6 36.Rh7?? Kd6 37.e4 a5 38.f4?? a4-+ 39.Rh8 Kc5?? 40.Rd8? a3-+ 41.d6 Rf7?? 42.Rd2-/+ Be6 43.Rd3?? a2-+ 44.Rc3 Kd4 45.Rc7 a1Q 46.Rf7 Qc3 47.Kh2 Bf7 48.d7 Be6 49.Rc8 Qc8! 50.dc8Q Bc8 (51.f5 b2-+) 0–1. I need chocolate... – dugmak, ChessWorld.net, 2005.

4.c3 Bf5 5.Qa4 =+.

4.Nf3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.d4 d5).

4.Nf3 Bg7 5.e3 c6 6.c4 Bg4 7.Nbd2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4).

4.g3 Bg7 5.Bg2 Qd6 6.Nh3 (better is 6.a3!?=+) 6...Qb4-/+ 7.Nc3?? (better is 7.Bc3 Qc4 8.Nf4-/+) 7…Qb2-+ (8.Na4 Qa3-+) 0–1. AndrewDev – pierre (2190), internet, 2007.

(--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6).

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3).

4.e3 e6 5.a3 Nbd7 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.e3 Bf5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6).

4.e3 Bf5 5.c4 Nbd7 6.Nc3 e6 7.a3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Nc3).

4.e3 Bf5 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.e3 Bg4 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.e3 Bg4 5.c4 Nbd7 6.Qb3 e6 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

4.e3 Bg4 5.c4 e6 6.Qb3 Nbd7 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

4.e3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.e3 Bg4 5.Be2 Nbd7 6.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.c4 Nbd7 6.Be2).

4.g3 g6 5.Bg2 Bg7 6.d3 0-0 7.Nbd2 Bg4 8.0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0-0 5.Bg2 d5 6.0-0 c6 7.d3 Bg4 8.Nbd2).

4.a3 a5 =.

4.e3 e6 5.a3 a6 (5...Bd6 6.Be2=) 6.c4 (6.Be2 c5=) 6...dc4 7.Bc4 b5 8.Bb3 (8.Be2 a5=) 8...Be7 (8...a5 9.ba5 Bd6 10.d3=) 9.0-0 (9.Ne5 a5=) 9...0-0 (9...a5 10.ba5 Ra5 11.Ne5=) 10.Nc3 (10.Qc2 a5=) 10...Bc6 (10...a5 11.Qe2=) 11.Rc1 Nbd7 12.Nd4 Bb7 13.Nce2 (13.Be6!? fe6 14.Ne6=) 13...c5=+ 14.bc5 Nc5 15.d3 Nb3 (15...Qd7 16.e4=+) 16.Nb3 Rc8 17.Qd2?? (better is 17.Bf6 Rc1 18.Qc1 Bf6 19.Nc5=+) 17...Qd5-+ 18.e4 Qb3 19.Ra1 (19.Nd4 Qa4 20.Nc2-+) 19...Rc2 20.Qa5 (20.Qf4 Rb2 21.Qc7 Re2 22.Qe7 Ba8-+) 20...Bd8 (20...Qb2 21.Rfb1 Qe5 22.Qb6-+) 21.Qe1 (21.Nd4 Qb2 22.Qb4 Ba5 23.Qb2 Rb2-+) 21...Qb2 22.Rb1 Qe5 23.f4 Bb6 24.Kh1 Qc7 25.Rb3 Ra2 26.Rc3 Qd7 27.Nc1 Ra1 28.Qe2 Rc8 29.Rc8 Qc8 30.Qb2 Bd4 31.Qd2 Qc3 32.Qd1 Be3 0–1. Scholz,Christoph – Kreuter,Sebastian, Baden–ch U15, 1996.

4.g3 g6 (4...e6 5.a3=+) 5.Bg2= e6 6.Ne5 (6.a3 Bg7=) 6...Ba4 (6...Bb4!? 7.c4 c6=+) 7.Nc3+= Bc6 (7...Bd7 8.a3+=) 8.a3 (8.b5 Bd7+-) 8...Bg7= 9.Nc6 (9.b5 Bd7=) 9...Nc6 10.0-0 0-0 11.d4 Ne7 (11...Nd7 12.e4 Nb6 13.Ne2=) 12.e3 (12.e4 a5=) 12...c6 13.Ne2 Nf5 14.Rc1 (14.c4 Nd6 15.c5 Nc4=) 14...Nd6=+ 15.Qd3 Nc4 16.Ba1 a5 17.c3? (better 17.Bc3!?=+) 17...Na3-+ 18.ba5 Ra5 19.Nf4 Nc4 20.Rfd1 (20.e4 Bh6-+) 20...Ra2 (20...b5 21.Rb1-+) 21.Qb1 Ra7 22.Bf1 (22.Qd3 b5-+) 22...Nd6 (22...b5 23.Qb4-+) 23.c4 Nfe4 (23...dc4 24.Bc4 Nc4 25.Rc4-+) 24.cd5 (24.c5!? Nf5 25.Bd3=+) 24...ed5-/+ 25.Qb4 Nb5?? (better 25...Qa5 26.Qa5 Ra5-/+) 26.Bb5= cb5 27.Qb5 Ng5 (27...Ra2!? 28.Qb3 Rf2 29.Qb7 Ra2=) 28.Nd5+- (28.Qd5?! Nh3 29.Kf1 Qd5 30.Nd5 Ra2=) 28...Ra5 (28...Ra2 29.Nb4 Ra7 30.Bc3+-) 29.Ne7!+- Kh8 (29...Qe7 30.Qa5 Deflection) 30.Qb7 Re8?? (better 30...Ra2 31.Kg2 Bf6+-) 31.Rc8 (better 31.Nc6 Qa8 32.Na5 Qa5 33.Rc8+-) 31...Ra1 (31...Qe7 32.Qe7 Rc8+-) 32.Ra1 Nf3 (32...Qe7 33.Qe7 Rc8 34.Qg5+-) 33.Kg2. Jokmin,Alex – Bester,Kazimierz, RN–2010-0-00320, 2010.

(--> 1.b4 d5 2.Bb2 Nd7 3.Nf3 Ngf6).

4.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

4.e3 e6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

4.e3 e6 5.b5 Bd6 6.c4 0-0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.Be2).

4.d3 Nf6 5.Nbd2 Nc6 6.b5 Nb4? 7.a3+- 1–0. Wall,Bill – Guest7724, internet, 2001.

4.e3 Nc6 5.a3 e6 6.d3 Nd6 7.Nbd2 b6 8.c4 dc4 9.Nc4 f6 10.Nd6 Bd6 11.Be2 Bb7 12.0-0 Qd7 13.Rc1 0-0-0 14.d4 e5? (better is 14...Ne7!?+/–) 15.de5 fe5 16.Bb5 Qf5?? (better is 16...a6 17.Bc6 Bc6 18.Ne5 Be5 19.Be5 Qd1 20.Rfd1 Rd1 21.Rd1 Re8+/–) 17.Bc6+- (17.Rc6?! a6 18.Ba4 b5+-) 17...Bc6 18.Rc6 Bb4 19.Qc1 (19.Be5 Rd1 20.Rc7 Kb8 21.Rd1 Bd6 22.Bd6 Rd8 23.Rd7 Kc8 24.Rd8 Kd8 25.Bf8 Ke8 26.Bg7 Qc2+-) 19...Bc5 (19...Bd6 20.Rd1 Kb8 21.Rc4+-) 20.Rc5 bc5 21.Qc5 Qd3 (21...Rhe8 22.Ne5 Rd2 23.Bd4+-) 22.Be5 (worse is 22.Qe5 Rd7+-) 22...Rd7 23.Qa7 Kd8 1–0. Fournier,Frederic – ersino, Active, 2008.

4.a3 a6 (4...e6 5.Nf3=) 5.Nf3 (5.e3 Bf5=) 5...d4 6.c3 dc3 7.Nc3 Nd5 (7...Bg4 8.Rc1=) 8.e3 Nc3 9.dc3 Bg4 (9...Bf5 10.c4+=) 10.c4 e6 11.Be2 Bd6 (11...Qe7!?+=) 12.Bg7+- Rg8 13.Bc3 e5 (13...Bf5!? 14.0-0 Bh3+-) 14.c5 Bf3 (better 14...e4 15.Nd4 Be2 16.Qe2 Nd4 17.ed4 Bf4+-) 15.Bf3 (15.gf3?! Qh4 16.Kd2 Be7=; 15.cd6?? Rg2 (15...Bg2?! 16.Rg1-/+) 16.dc7 Qh4 17.Kd2 Be2-+) 15...Be7 (15...Bf8 16.Bc6 bc6 17.Qf3+- (17.Be5?! Rg2 18.Qf3 Qd2 19.Kf1 Rg6+-)) 16.Qc2 ef4 17.Qh7 (17.ef4?! Qd7 18.Rd1 Qe6 19.Qe2 Rg6+-) 17...Rf8 (17...Rg6 18.Rd1 Qc8 19.Bd5+-) 18.Qh6 (better 18.Bg7 fe3 19.Rd1+-) 18...f6 (18...Bh4 19.Ke2 Nb8 20.Bb7 Qe7 21.Qf4 Ra7+-) 19.Qh5 Rf7 20.Bd5 Qd5 21.Qd5 Rd8 (21...fe3 22.0-0+-) 22.Qe4 1–0. guestczqc – guestmtay, internet free game, 2018.

4.b5 Na5 5.e3 Nc4 (5...g6 6.Bd4=+) 6.Bf6 (6.Bc4 dc4 7.Nf3 a6 8.ba6 Ra6=) 6...ef6 7.Bc4 dc4 8.d3? (better 8.Qe2!?=) 8...cd3 (8...a6 9.ba6 cd3 10.Qd3 Ra6 11.Qd8 Kd8 12.Nf3-/+) 9.Qd3 Qd3 (9...a6 10.Nc3-/+) 10.cd3 Bc5 (10...Bb4 11.Kf2 Bf5 12.a3-/+) 11.Kd2 (11.Kf2 a6 12.Nc3 ab5 13.Nb5 Kd8=+) 11...0-0 (11...a6 12.Nc3-/+) 12.Nf3=+ Re8 13.Re1 (13.e4 a6 14.Nc3 ab5 15.Nb5 Re7=+) 13...Bb4 (13...a6 14.ba6 Ra6 15.Nc3-/+) 14.Nc3=+ a5 (14...a6!? 15.a4 Bd7=+) 15.a3= Bc5 (15...Bd6 16.Rec1 Bd7 17.Nd4=) 16.Ne4 (16.Nd5!? Rd8 17.Nc7+-) 16...Bb6= 17.a4 (better 17.Rec1=) 17...c5 (17...f5 18.Nc3=) 18.g4?? (better 18.Rec1+-) 18...Bg4=+ 19.Rg1? (better 19.Nf6 gf6 20.Rg1-/+) 19...Bf3-+ 20.Nf6 Kh8 21.Ne8 Re8 22.Rg3 Bh5 (22...Bd5 23.e4 Bb3 24.Kc3-+) 23.Rag1 (23.Rg5 g6 24.Re5-+) 23...g6 24.h4 (24.Rc1 f5-+) 24...f5 (24...Bd8 25.Rh1-+) 25.Re1 (25.Rc1 Kg7-+) 25...Rd8 (25...Bd8 26.Rh3-+) 26.d4 (26.Rc1-+) 26...cd4 27.ed4 Rd4 28.Kc3 (28.Rd3 Re4-+ (28...Ra4?! 29.Re8 Kg7 30.Rd7 Kf6 31.Rd6 Kf7 32.Rb8 Rd4 33.Rd4 Bd4 34.Kd3-+; 28...Rf4?! 29.Re7-+)) 28...Ra4 29.Re8 Kg7 30.Rge3 (30.Re7 Kh6 31.Kd2-+) 30...Be3 31.Re3 Rf4 (31...Rf4 32.Re7 Kf6 33.Rb7 Rb4-+) 0–1. fgn7700g – mefisto10, PlayOK, 2018.

4.Nf3 Nc6 5.b5+= Nb4 6.Nd4 e5 (6...Bg4 7.a3 Nbd5 8.h3+=) 7.fe5+- Nfd5 (7...Ne4 8.Nf3 Bc5+-) 8.Nf3+- Nf4 (better 8...Bf5 9.Na3 Nb6+-) 9.e3 Nfd5 (9...Ng6 10.Bc4 Be7+-) 10.a3 Ne3 11.de3 Qd1 12.Kd1 Bg4 (12...Nd5 13.Bd4 Be7+-) 13.ab4 Bf3 (13...0-0-0 14.Bd3 Be6 15.Nd4 Bg4 16.Kc1+-) 14.gf3 0-0-0 (14...Bb4 15.Bc4+-) 15.Ke2 Bb4 (15...Kb8 16.Ra4+-) 16.Rg1 g6 (16...Rhg8 17.Ra7 g6 18.Ra4+-) 17.Ra7 Kb8 (17...Bc5 18.Bh3 Kb8 19.Ra4+-) 18.Ra4 Bc5 19.Nc3 c6 20.bc6 bc6 21.Bh3 Ba7 22.Rb1 Kc7 1–0. guestcvwz – guestzeir, private online chess game, 2018.

4.Nf3 e6 5.Nd4 Bb4 6.e3 c5 7.Nb3 c4 8.Bc4 Ne4 9.Qg4 g6?? (better is 9...Bf8+/–) 10.Bh8+- 1–0. b4_player – jan, internet, 2013.

4.e3 Nc6 5.b5 Na5 6.Nf3 a6 7.ba6 ba6 (7...Ra6? 8.Ba6 ba6 9.Bd4+-) 8.Nc3 Bg4 (8...e6 9.Rb1+=) 9.h3 Bf3 10.Qf3 e6 11.Bd3 Nc4? (better 11...Rb8!? 12.Rb1 Bb4+=) 12.Bc4+- dc4 13.Qc6 Nd7 14.0-0 Rb8 (14...Be7 15.f5 ef5 16.Nd5+-) 15.Na4 Bd6 (15...Qc8 16.Rab1+-) 16.Bg7 Rg8 17.Bd4 Qe7? (better 17...Qh4+-) 18.Rab1 Rb1 (18...Rb5 19.Qa6 Rh5 20.Rf3+- (20.Qc4?! Rh3 21.Rf3 Rf3+-)) 19.Rb1 Qd8 (19...Kf8 20.Qc4 e5 21.Be5 Be5 22.fe5 Ne5 23.Qa6+-) 20.Nc3 (20.Qc4?! Qa8 21.Qf1 Ke7+-) 20...Qh4 (20...Rg6+-) 21.Rb8 (21.Rb8 Ke7 22.Rg8 Qe1 23.Kh2 Qd2 24.Ne4 Bf4 25.ef4 Qd4 26.Qa8+-) 1–0. Janek – Guest184, internet, 2018.

4.e3 Nc6 5.b5 Na5 6.Nf3 Nc4 7.Bc4 dc4 8.Na3 Be6 (8...e6!?=) 9.Qe2 Qd5 10.Ne5 Pawn c4, live or die! 10...0-0-0 11.Nac4 Ne4 12.f5! Bf5 13.d3 f6 14.de4 Qb5?? (better is 14...Be4 15.Nf3 e5+-) 15.Nd6! Rd6 (15...cd6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug); 15...Rd6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug); 15...ed6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug)) 16.Qb5 (16.Qb5 Be6 17.Nc4 Bc4 18.Qc4+-) 1–0. b4_player – hannam, casual, 2013.

4.Nf3 c5 5.bc5= Nc5 6.e3 e6 7.c4 Be7 8.Nc3 0-0 9.Qc2 b6 10.cd5 ed5 11.Be2 Bb7 12.Rc1 (12.0-0 Rc8=) 12...Rc8 13.0-0 Nce4 14.Qa4 (14.Qb3 Nc5 15.Qd1 a6=) 14...a5 (14...a6 15.Ne4 (15.Ba6? Nc3 16.Bc3 Ra8-+) 15...de4 16.Rc8 Qc8 17.Rc1=) 15.Ne4+= Ne4 16.Rc8 Qc8 (16...Bc8 17.Rc1+=) 17.Qd4 Bf6 (better 17...f6!? 18.Qb6 Bc5+-) 18.Qb6+- Bb2 19.Qb2 Ba6 (19...Qd7 20.Rb1 Ba8 21.Qb6+-) 20.Rc1 Qf5?? (better 20...Qa8 21.d3 Nf6+-) 21.Ba6 h5 (21...Qe6 22.Bb7 Nf6 23.Rc5+-) 22.Qb5 h4 (22...Qf6 23.Qa5 Qd6 24.Bb7+-) 23.Nh4 Qg4 (23...Qf6 24.Qd5 Nd2 25.Qa5+-) 24.Qd5 Nf6 (24...Qh4 25.Qe4 Rb8 26.d4+-) 25.Qg5 Qe2 (25...Rd8+-) 26.Be2 (26.Be2 Ne4 27.Qe7 Nc5 28.Rc5 Rb8 29.Rc7 Rf8 30.Nf5 Rc8 31.Qf7 Kh7 32.Qg7) 1–0. Pierre – Mrky, internet, 2020.

4.Nf3 g6 5.e3 Bg7 6.d4 0-0 7.Bd3 b6 (7...a5 8.b5=+) 8.Nc3= c5 9.bc5 bc5 10.0-0 cd4 (10...Rb8 11.Rb1=) 11.ed4 Nb6 (11...Rb8 12.Rb1=) 12.Rb1 (better 12.Ne5=) 12...e6? (better 12...Bg4!?=) 13.Ba3 (13.Ne5 Re8+-) 13...Re8 14.Ne5 Nbd7 (better 14...a6!?+-) 15.Nb5+- Qa5 16.c4 a6? (better 16...dc4 17.Nc4 Qd8+-) 17.Bb4 Qa2? (17...ab5 18.Ba5 bc4 19.Bc4 dc4+-) 18.Nc3 Qb1 19.Nb1 (worse 19.Qb1 dc4 20.Bc4 Rb8+-) 19...Ne4 (19...dc4 20.Bc4 Nb6 21.Bd3+-) 20.cd5 ed5 21.Nc3 a5 (21...Nc3 22.Bc3 Rb8 23.Qa4+-) 22.Nd5 ab4 23.Be4 Ne5 (23...Rb8 24.Qa4 b3 25.Rc1+-) 24.fe5 Ba6 (24...Ra5 25.Nb4 Be6 26.Qf3+-) 25.Nf6 Bf6 26.Rf6 Ra7 (26...Bc4 27.Ba8 Ra8 28.d5+-) 27.Qa4 Re6 28.Bd5 Rf6 29.Qe8 Kg7 30.ef6 Kf6 (30...Kh6 31.Qe3 Kh5 32.Bf3 Kh4 33.Qf4) 31.Qe5 1–0. Pierre – Mrkyc, internet, 2020.

4.Be5 Bb4 5.Bg2 Nc6 6.Bb2 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.g3 Nc6 5.Bb2 d5 6.Bg2).

4.Be5 Bb4 5.Bg2 Nc6 6.Bb2 0-0 7.Nf3 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.Nf3 Nc6 5.Bb2 0-0 6.g3 d5 7.Bg2).

4.Be5 Nc6 5.Bf4 =+.

4.Be5 Nbd7 5.Bb2 (5.Bc3!?=) 5...Bb4=+ 6.Bg2 c6 7.Nf3 Qe7 (7...0-0 8.0-0=+) 8.0-0 (8.a3 Bc5=+) 8...h6 (8...0-0 9.a3 Bd6 10.Re1=+) 9.a3 Bc5 10.d3 (10.d4 Bd6=) 10...Nb6 (better is 10...0-0=+) 11.Re1?? (11.Nbd2 0-0=) 11...Be6?? (better is 11...Bf2 12.Kh1 Be1 13.Qe1 0-0-+) 12.e4 0-0-0 13.d4 de4-/+ 14.Ne5 Bf5 15.c3 Na8 16.Nd2 Bd6 17.Ne4 Be5 18.Nf6 gf6 19.f4 Nc7 20.fe5 fe5 21.Re5 Qf6?? 22.Qe2 Be6 23.Rf1 Qg7 24.a4 Rdg8? 25.c4+- Bg4 26.Qf2 Be6? 27.d5 cd5 28.Re6! Qg4 29.Re7 Rh7 30.Rf7 Rf7 31.Qf7 h5 32.cd5 Rg7 33.Bg7 (33...b6 34.Qg8 Kb7 35.d6 Ka6 36.dc7 Qg7 37.Qc4 Ka5 38.Qb5) 1–0. sighBorg – dunk, internet, 2007.

4.f3 Bd7 5.Nc3 e6 (5...e5 6.e3 Bb4 7.Nge2-+) 6.Bg2 (6.e4 Bb4 7.Nge2 0-0-+) 6...Bb4 7.a3 Bc3 (7...Bd6 8.e3-+) 8.Bc3 0-0 (8...Nc6 9.e3-+) 9.Bb2 (9.e3 c5-+) 9...Bc6 (9...Nh5 10.h4-+) 10.c4 (10.e3 Nfd7-+) 10...dc4 11.Qc2 Ng4! 12.h3 (12.fg4 Qh4 Double attack (12...Bg2 Pinning; 12...Bg2 Deflection; 12...Qh4 Decoy)) 12...Qh4 13.Kd1 Nf2 14.Kc1 Nh1 (14...Qg3!? 15.Qc3 f6 16.Bf1 Nh1 17.Qe3-+) 15.Bh1 Qg3 16.Qd1 (16.Qc4 Qg1 17.Kc2 Qg6 18.d3 f5-+) 16...Rd8 (16...Qh2 17.Qe1-+) 17.a4 (17.Qf1 Na6 18.Bc3 Nc5-+) 17...Bd5 (better 17...Qh2 18.Qf1 Qh1 19.Kd1-+) 18.Ra3 (18.Qf1 Na6 19.Kd1 Nc5-+) 18...a6 (18...Qh2 19.e4 Qh1 20.ed5 Rd5 21.Rc3-+) 19.f4 (19.Qf1 Qd6-+) 19...Qg6 (better 19...Qf4!? 20.Bd5 Rd5 21.Rf3-+) 20.Nf3 (20.Bd5 ed5 21.Nf3 Nc6-+) 20...Bf3 (20...Nd7!? 21.Nh4 Qh5 22.Bd5 Qd5 23.Qg1-+) 21.Bf3 Nc6 22.Qh1 (22.Bc6 bc6 23.Qe1 f6-+) 22...Nd4 (22...Na5 23.Qg2 Nb3 24.Rb3 Qg2 25.Bg2 cb3 26.Bb7-+) 23.Be4 (23.Bd4 Rd4 24.e3 Rd6-+) 23...Qf6 (better 23...Ne2 24.Kc2 Qh6 25.Bb7-+) 24.e3 (24.Qg2 e5 25.Bb7-+) 24...Nc6 (better 24...Ne2 25.Kb1 Qh4 26.Bb7 Rab8-+) 25.Bf6+- gf6 26.Qg1 (26.Bc6!? bc6 27.Qc6 h6+-) 26...Kf8 27.Qg4 (27.Bc6 bc6 28.e4 Rd3+-) 27...Ke7?? (better 27...f5 28.Bf5 ef5 29.Qf5 Rd6+-) 28.Qh4 (better 28.Bc6 bc6 29.Qe2 f5+-) 28...Nd4?? (28...Na5 29.d3 Nb3 30.Kc2 cd3 31.Bd3 Nc5+-) 29.Qh7 (better 29.ed4 Rd4 30.Bb7+-) 29...Nb3? Exerts pressure on the backward pawn (better 29...Rh8 30.Qg7 Rag8 31.Qh8 Rh8 32.ed4 c6+-) 30.Kb2?? (better 30.Rb3 cb3 31.Bg6+- (worse 31.Bb7 Rab8 32.Qe4 b2 33.Kb2 Rd5+-)) 30...Rd2?? (better 30...Rh8 31.Qg7 Rag8 32.Qg8 Rg8 33.Bb7 Rb8 34.Rb3 cb3 35.Ba6 Rb4-/+) 31.Kc3+- Rd3 (31...Rd6 32.Bb7 Rad8 33.Be4+-) 32.Kc4 (32.Bd3 Nc5 33.Bc4 f5+-) 32...Rc3 (32...Rdd8 33.Rb3 Rh8+-) 33.Kc3 Rd8 (33...Nc5+-) 34.Kb3 Rd3 35.Kc4 (better 35.Bd3 f5+-) 35...Re3 (35...Ra3 36.Bg6 Kd6 37.Qf7 Ra4 38.Kb3+-) 36.Qf7! Kf7 37.f5 (better 37.Re3 c6+-) 37...Kg7 (better 37...Ra3 38.Kb4 Ra1-+ (worse 38...Rh3 39.fe6 Ke6 40.Bb7 Rh4 41.Ka5-+)) 38.Bd5 (38.Re3 b5 39.ab5 ab5 40.Kb5 ef5 41.Rg3 Kh8 42.Bf5 c6 43.Ka5 c5 44.h4 c4 45.h5 c3 46.h6 c2 47.h7 c1Q 48.Rg8) 38...ef5 (better 38...ed5 39.Kb4 Ra3 40.Ka3-+) 39.Be6 (39.Re3 c6 40.Bg2 b5 41.ab5 cb5 42.Kb4 Kg6+-) 39...Kg6 (better 39...Ra3 40.Kb4 Rh3 41.Bf5 Rh4 42.Ka3 b5 43.ab5 ab5-+) 40.Bf7!! Kg5 (40...Kf7 41.Re3 Zwischenzug) 41.Kd5 (better 41.Re3 f4 42.Rb3+-) 41…Kh4 (41...Kh4 42.Re3 a5+-). Agiant – newbieee12, lichess.org, 2019.

4.Bg2 Bf5 5.c4 e6 6.Qb3 c6 (6...Nc6 7.cd5 Nb4 8.Qa4 Nd7 9.Nc3-+) 7.Qg3? (7.Nf3!?-/+) 7...Bg6 8.c5 a5 9.Nh3 ab4 10.Nf4? (10.d4-+) 10...Bc5 11.h4 0-0 12.h5 Be4 (12...Bf5 13.d4 Bd6 14.h6-+) 13.h6?? (better 13.Be4 e5 14.Rg1 Bf2 15.Qf2 Ne4 16.Be5=) 13...g6-+ 14.f3 Bf5 15.Qg5 Be7 16.Qg3 Nbd7 17.Nh5 (17.d3-+) 17...Nh5 18.Rh5 Bf6 19.d4 c5 (19...Nb6!? 20.Nd2 Na4 21.Bc1 Bd4 22.Nb3 Ba1 23.Na1-+) 20.Nd2 (20.e4 cd4 21.Nd2 Nc5 22.ef5 Nd3 23.Kf1 Nb2 24.fg6 fg6-+) 20...Bd4 (better 20...c4!? 21.Ne4-+) 21.Bd4 cd4 22.Nb3 e5 (better 22...Qf6 23.Rf5 ef5-+) 23.Rf5-/+ Kh8 (better 23...Rc8-/+) 24.Re5+= Ne5 25.Qe5 f6 26.Qd4 Rc8 27.Rd1 Rc2 28.Kf2 Re8 Exerts pressure on the backward pawn 29.Rd2 Rd2 30.Nd2 Qe7 31.Bf1 Qe5 32.Qe5 fe5 33.e4 d4 34.Bc4 g5 35.Ke2 Rc8 36.Kd3 Rc6 37.Nb3? (37.Bd5 Rc3 38.Ke2=) 37...Rh6-+ 38.Nc5 (38.Bd5 Rh3 39.Ke2 Rh2 40.Ke1 Ra2-+) 38...Rh3 39.Ke2 Rh2 (39...g4 40.Be6 Rh2 41.Kf1-+) 40.Kd3? (better 40.Kd1-+) 40...Rh3 41.Be6?? (41.Ke2 g4 42.Be6 Rh2 43.Kf1-+) 41...Rf3-+ 42.Kc4 Rf4 43.Kd5 g4 44.Ke5 Rf1 (44...g3 45.Bh3 (45.Kf4?? g2-+) 45...Rh4 46.Bf1-+) 45.Nd3?? (45.Bg4 Ra1+=) 45...Ra1 (better 45...g3 46.Bh3 Rh1-+) 46.Kd4?? (better 46.Bg4 Ra2 47.Kd4=) 46...Re1?? (better 46...g3 47.Nf4 Rf1-+) 47.Bg4 (better 47.Ne1 h5 48.Ke3+-) 47...Rd1?? (47...Rg1 48.Bf3+/-) 48.Be6 (better 48.Bd1 b3 49.ab3+-) 48...h6 49.Bb3 Kg7?? (49...Rg1 50.e5 Kg7 51.Kc5+- (51.Nb4?! h5+/-)) 50.Ke3 (50.Bd1!? Kg6+-) 50...Rd2?? (50...Rf1!?+/-) 51.e5 (51.Kd2 b6 52.e5+-) 51...Rh2+/- 52.Nf4 Rh3?? (52...Kf8 53.Bd5 Rc2 54.Nd3+-) 53.Ke4 (53.Nh3 h5 54.Ke4 Kg6 55.Nf4 Kg7 56.Kf5 h4 57.e6 Kh6 58.e7 Kg7 59.e8Q h3 60.Kg5 h2 61.Qg8) 53...Kf8?? (53...Rh1 54.Kf5 Rg1 55.Bd5+-) 54.Ne6 (54.Nh3 b5 55.Nf4+-) 54...Ke7+/- 55.Kd5 Rh2 56.Nd4 Rh1?? (better 56...Rh5+/-) 57.Nf5+- (57.Nf5 Kf7 58.Kd6 Kg6 59.Ne7 Kg5 60.e6+-) 1-0. fide1190 (2425) - turnuva6 (2300), Rated Bullet game, lichess.org, 2015.

4.a3 Bf5 5.d3 e6 6.g4 (6.Nf3 Bd6=+) 6...Bg6=+ 7.Bg2 Bd6 8.e3 0-0 9.Ne2 (9.h4 h5 10.gh5 Bh5=) 9...a6 10.Nd2 (10.f4=) 10...Ne5 (10...b5 11.h4 h5 12.gh5 Bh5 13.Qb1=) 11.Nf4 (11.f4 Nc6 12.e4 de4 13.de4+- (worse 13.Ne4 Ne4 14.de4 Qh4 15.Kf1 f6=+)) 11...c5 (better 11...a5=+) 12.bc5+- Bc7 13.Ng6 (13.Be5 Be5 14.Ng6 fg6+-) 13...fg6 (13...Ng6 14.0-0+=) 14.Nb3 (14.Be5 Be5 15.d4 Bc7+-) 14...Qe7 (14...g5 15.Be5 Be5 16.d4+-) 15.Qd2 (15.f4 Nc6+-) 15...Rac8 16.f4 Nc6 17.Bf3 (17.Rc1 g5 18.c4 gf4 19.ef4 Nh5 20.gh5 Bf4=) 17...Rcd8 (17...Nd7 18.d4=) 18.0-0-0 (18.0-0 Ne4 19.Be4 de4+=) 18...a5 (18...Nd7 19.Qc3=) 19.g5 (19.Rdf1 Nd7+=) 19...Nd7= 20.h4 (20.d4 b5=) 20...a4 21.Nd4 Nc5 (21...Nd4 22.Bd4 Nc5 23.Rdf1=) 22.Nb5 (22.Nc6 bc6 23.h5 gh5 24.Rh5 e5+-) 22...Ba5 23.Bc3 (23.Qg2 Nb3 24.cb3 Qc5 25.Kb1 Qb5=) 23...Bb6 (23...Bc3 24.Qc3 e5 25.d4 ed4 26.Nd4=) 24.Nd4 (24.d4!? Na6 25.h5 gh5 26.Bh5+=) 24...Nd4 (24...Na6 25.Nb5 d4 26.ed4-/+) 25.Bd4 Qd6 (25...Nd7 26.Kb2=+) 26.Bb2 (26.Qb4 Qc6 27.Kd2 Qc7=) 26...Nd7 27.Qc3?? (better 27.h5!? Bc5 28.hg6 hg6 29.Qh2 Be3 30.Kb1+=) 27...d4?? (27...Be3 28.Kb1 d4 29.Qb4-+) 28.ed4?? (better 28.Qc4 de3 29.Qc3-/+) 28...Qf4-+ 29.Kb1 Rc8 (29...Qf3 30.Qc4-+) 30.Qb4 (better 30.Qe1 Qf3 31.Qe6 Qf7 32.d5-+) 30...Qf3 31.Rdf1 (31.Qa4 Rc6-+) 31...Qd5 (31...Qg2 32.Rf8 Nf8 33.Rc1-+) 32.Rf8 (32.Qa4 Rc6-+) 32...Rf8 33.Qa4 (33.Rc1 Rf4-+) 33...Rf5 (better 33...Qh1 34.Ka2 Rf7-+) 34.Re1 Kf7 (better 34...Ba5 35.Rc1 Nb6 36.Qe8 Rf8-+) 35.Qd7?? (better 35.c4 Qc6 36.Qc6 bc6 37.Re4-+) 35...Qd7 36.d5 Qd5 37.Re4 Rf1 38.Bc1 Qe4! 39.de4 (39.de4 Be3 Combination) 39...Be3 40.Kb2 Bc1 41.Kc3 Ba3 42.Kd4 b6 43.c3 Bc5 44.Kc4 Rf4 45.Kb5 Re4 46.Kc6 Rh4 47.Kb5 Rg4 (47...e5 48.Kc6 e4 49.Kc7 e3 50.Kc6 e2 51.Kc7 e1Q 52.Kb8 Qe8 53.Kc7 Ra4 54.Kb7 Qd7 55.Kb8 Bd6) 48.Kc6 Rg5 49.Kd7 Rd5 50.Kc6 Rd3 51.Kb5 Rc3 52.Ka4 Rc2 53.Kb5 Ke7 54.Kc6 Rc3 55.Kb5 Kd6 56.Ka4 (56.Ka6 Kc6 57.Ka7 Bd6 58.Ka6 Ra3) 56...Rc1 (56...b5 57.Kb5 g5 58.Ka4 Kc6 59.Ka5 Ra3) 57.Kb3 g5 (57...Bd4 58.Ka4 Kc5 59.Kb3 g5 60.Ka4 Kc4 61.Ka3 Ra1) 58.Kb2-+ Rc4 59.Kb3 b5 60.Kb2 Bd4 (60...g4 61.Kb3 g3 62.Ka2 g2 63.Kb3 g1Q 64.Kb2 Qf2 65.Kb1 Qc2 66.Ka1 Bd4) 61.Kb1 (61.Ka2 Rc2 62.Kb1 Rf2 63.Kc1 g4 64.Kd1 g3 65.Ke1 g2 66.Kd1 g1Q) 61...Rc3 (61...g4 62.Ka2 g3 63.Ka3 g2 64.Ka2 Ra4 65.Kb3 g1Q 66.Kc2 Ra2 67.Kd3 Qe3) 62.Ka2 (62.Kb2 g4 63.Kb1 g3 64.Kb2 g2 65.Kb1 g1Q 66.Ka2 Qf2 67.Kb1 Qc2 68.Ka1 Rd3) 62...Kc5 63.Kb2 Kc4 64.Ka2 (64.Ka1 Rc1 65.Ka2 Ra1) 64...g4 (64...Rc1 65.Ka3 Ra1) 65.Kb2 g3 66.Ka2 (66.Kb1 g2 67.Kb2 Rf3 68.Kc1 g1Q 69.Kd2 Rf2) 66...g2 (66...Rc1 67.Ka3 Ra1) 67.Kb2 g1Q 68.Ka2 Qf2 (68...Rc2 69.Ka3 Qe3) 69.Kb1 Rb3 (69...Qc2 70.Ka1 Rd3) 70.Kc1 Be3 71.Kd1 Rb1 (71...Rd3) 0–1. adabriwala – adooo (1750), lichess.org, 2019.

4.b5 Na5 5.Nf3 Nc4 6.Bc3 (6.Bd4 a6=+) 6...e6 (6...Ne4 7.e3=+) 7.d3 Bc5?? (better is 7...Nd6=+) 8.dc4+- (8...Ne4 9.e3 Nc3 10.Nc3+-) 1–0. dale4 – EELDROP, Live Game Caissa's Web, 2005.

4.a3 =+.

4.e3 Bb4 5.a3 Bd6 6.Nf3 Nbd7 7.d4 Ne4 8.g3 Qf6 9.Bg2 Ng3 (9...0-0-/+) 10.Rg1? (better is 10.fg3 Bg3 11.Kd2+=) 10...Ne4-+ 11.Nbd2 0-0 12.Qe2 Nd2 13.Nd2 Qe7 14.e4 de4 15.Be4 Nf6 16.d5? (better is 16.Qf3-+) 16...ed5 17.Bd5 Qe2 (17...Nd5?? 18.Rg7 Kh8 19.Rf7 Kg8 20.Qe7 (20.Re7?! Ne7 21.Ne4 Rf7+-) 20...Be7 21.Rg7 Kh8 22.Re7 Rf6 23.Re5+- (23.Bf6?! Nf6 24.h4 Nd5 25.Re8 Kg7+-)) 18.Ke2 Re8 (18...Nd5?? 19.Rg7 Kh8 20.Rg8 Kg8 21.Rg1 Bg3 22.Rg3 Bg4 23.Rg4) 19.Kf1 Be5 20.Be5 Re5 (20...Nd5?! 21.Rg7 Kf8 22.Bd4-+; worse is 20...Bh3 21.Bg2 Bg2 22.Kg2 Re5 23.Rge1-+) 21.Bf3 (21.Bg2-+) 21...Bh3 22.Bg2 Bg2 23.Rg2 Rae8 24.Rb1 b5 25.Nf3 Rc5 26.Nd4 Rc4 27.Nb5 (27.Rb4 Rb4 28.ab4 a6-+) 27...a6 (27...Rc2?! 28.f3 Rc4 29.Na7-+) 28.Na7 Rc2 29.f3 Rg2 (better is 29...Rc3!? 30.a4-+) 30.Kg2 h5 31.Nc6 Re2 32.Kg3 Re3 33.a4 Ra3 0–1. jplayer (2020) – mpopp (2000), net–chess.com, 2013.

4.g4 h6 (better 4...Bb4!? 5.Nf3 0-0-+) 5.a3=+ c5 6.bc5 Bc5 7.e3 Nc6 8.d3 b6 (8...e5 9.Nd2-/+) 9.Nd2 a5 10.Nb3 Bd6 11.Bg2 Ba6 12.Qd2 Rc8 13.Nf3 (13.f4 a4 14.Nd4 Nd4 15.Bd4 Qc7=) 13...e5 14.g5 (14.Rb1 Qe7=+) 14...hg5-/+ 15.Ng5 e4 (better 15...Qc7-/+) 16.de4+= Ne5 17.ed5 Nc4 18.Qc1 Qe7 19.Nd4 Bf4?? (better 19...Nd5 20.Ne4 Nb2 21.Qb2 Be5+=) 20.Nf5+- Nb2 (20...Be5 21.Ne7 Bb2 22.Qb2 Nb2 23.Nc8 Bc8+-) 21.Qb2 (better 21.Ne7 Be5 22.f4 Bc3 23.Kf2 Ke7+-) 21...Qc5?? (better 21...Qe5 22.Ng7 Kd7 23.Qe5 Be5+-) 22.ef4 (better 22.Ng7 Kd7 23.ef4 Qc2 24.Qc2 Rc2 25.Bf3+-) 22...Qc4 (22...Kf8 23.0-0-0 Qf2+-) 23.0-0-0 (23.Qe5 Kf8 24.Qe7 Kg8 25.Qf7) 23...0-0?? (better 23...Qf4 24.Rd2 Qf5 25.Re1 Kf8 26.Qb6 Qg5 27.Qa6 Re8 28.Re8 Ne8 29.Qa5 Kg8+- (29...Qg2?? 30.d6 Qh1 31.Rd1 Qd1 32.Kd1 Nd6 33.Qc7+-)) 24.Ne7 (24.Ne4 Rc5+-) 24...Kh8 25.Nc8 (better 25.Rd4 Qe2 26.Nc8 Bc8+-) 25...Qf4 26.Kb1 Qg5 27.Ne7 (27.Nb6 Qg2 28.Rhg1 Qf2+-) 27...Qg2 28.Rdg1 (better 28.Qd4!? Qf3+-) 28...Qf2 29.Nc6?? (better 29.Qe5 Qf3 30.Qg5+-) 29...Ne4?? (better 29...Bc4 30.Qe5 Bd5+=) 30.Qg7 1–0. adabriwala – Me33447 (1700), lichess.org, 2019.

4.e3 Bg7 5.Nf3 0-0 6.c4 b6 7.cd5 Qd5 8.Nc3 Qd8 9.d4 Bb7 10.Be2 Nbd7 11.b5 Rc8 12.Qb3 e6 13.0-0 c5 14.bc6 Bc6 15.Rfc1 Qe7? (better 15...a5+=) 16.Ba3+- Qd8 17.Bf8 Bf8 18.a4 Nd5 (18...Bd6 19.Qb2+-) 19.Nd5 (19.Nb5!? Bb5 20.Rc8 Qc8 21.ab5 Qb7+-) 19...Bd5 20.Rc8 Qc8 (20...Bb3?? 21.Rd8 Nf6 22.Ra8+-) 21.Qb2 Nf6 22.a5 Ne4 (22...Qc7 23.ab6 ab6 24.Rb1+-) 23.ab6 ab6 24.Qb6 Qc2 25.Re1 Bc4 (25...Nc3 26.Qa6 Be4+-) 26.Bc4?? (better 26.Qc7 Bd3 27.Qc2 Bc2 28.Rc1+-) 26...Qf2= 27.Kh1 Ng3?? (better 27...Bd6=) 28.Kh2+- Nf5 29.e4 (29.Re2 Qg3 30.Kg1 Bh6+-) 29...Bd6?? (29...Nh4 30.Nh4 Qe1+-) 30.e5 Qg3 31.Kh1 (31.Kg1 Be7 32.Re4 h5+-) 31...Be7 32.Qb1 Qf2 33.Bd3 Bg5 (33...Ng3 34.Kh2 Nh5+-) 34.Bf5 gf5 35.Ng5 Qg3 (35...Kg7+-) 36.Nf3 (36.Nf3 Kh8 37.d5+-) 1-0. opperwezen (2715) - Calanthe (2300), lichess.org, 2018. (=1.h3 d5 2.b4 Nf6 3.Bb2)

4.e3 Bg7 5.Nf3 0-0 6.c4 dc4 7.Bc4 b6 (7...Nbd7 8.d4=) 8.d4 Bb7 9.b5 Nbd7 10.a4 c5 11.bc6 Bc6 12.Nbd2 Qc7 13.0-0 e6 14.Qb3 Qb7 15.Rfc1 Rfc8 16.Rc2 a6 17.Rac1 Nd5 (17...Bd5 18.Bd5 ed5 19.Ba3+=) 18.e4 N5f6 (better 18...Nf4!?+=) 19.Be6!+- Be4 (19...fe6 20.Qe6 Double attack) 20.Ne4 Ne4?? (20...Rc2 21.Bf7 Kh8 22.Qc2 Ne4+-) 21.Bf7 Kh8 22.Bd5 Rc2 23.Bb7 Ndc5 (23...Rc1 24.Bc1 Re8+-) 24.Qc2 (24.Ba8?! A) 24...Nb3?? 25.Rc2 (25.Be4?! Rc1 26.Bc1 Nc1+/-) 25...Nd6 26.Bd5+-; B) 24...Rc1 25.Bc1 Nb3+-; worse 24.Rc2 Nb3 25.Ba8 Nd6+-) 24...Nb7 25.Qe4 Rb8 26.Rc7 Nd6 27.Qe6 Re8 (27...Rd8 28.d5 Bb2 29.Qe7 Nf7 30.Qf7 Rd5 31.Qh7) 28.Qd7 (28.Qd6 Kg8 29.Qd7 Re1 30.Ne1 Bh6 31.Qh7 Kf8 32.Qf7) 28...Rg8 (28...Re1 29.Ne1 Nf5 30.Qe8 Bf8 31.Qf8) 29.Ng5 (29.Qd6 Re8 30.Qd7 Rg8 31.Qg7 Rg7 32.Rc8 Rg8 33.d5) 29...h6 (29...h5 30.Qd6 Rf8 31.Qg6 Rf2 32.Qg7) 30.Qd6 hg5 (30...Re8 31.Qg6 Re1 32.Kh2 Rh1 33.Kh1 hg5 34.Qg7) 31.Qg6 b5 32.d5 Bb2 33.Qh6 (33.Qh5) 1-0. opperwezen (2715) - Calanthe (2300), lichess.org, 2018. (=1.h3 d5 2.b4 Nf6 3.Bb2)

4.e3 Bg7 5.Nf3 0-0 6.d4 b6 7.c4 Bb7 8.Nc3 dc4 9.Bc4 Nbd7 10.b5 Rc8 11.0-0 (11.d5 Nc5 12.Ne5 e6 13.de6 Ne6+=) 11...e6 (11...c5 12.bc6 Rc6 13.Qe2=) 12.Qe2 c5 13.bc6 Bc6 14.Ba6 Rc7 15.Ba3?? (15.Rac1 Nb8 16.Bd3 Nd5+=) 15...Re8?? (better 15...Bf3 16.Qf3 Rc3-/+) 16.Rac1+= e5? (better 16...Nb8 17.Bd3 a6+=) 17.Bd6+- ed4 18.Nd4 Bb7 (better 18...Nb8 19.Bc7 Qc7+-) 19.Bc7 Qc7 (19...Ba6 20.Qa6 Qc7 21.Ncb5+-) 20.Bb7 (better 20.Ncb5!? Qc1 21.Rc1 Ba6+-) 20...Qb7 21.Qf3 (21.Ncb5!? Ra8+-) 21...Qb8 22.Rfd1 Ne5 23.Qe2 Nfd7? (23...Qb7 24.Ncb5 Qb8 25.f4+-) 24.Nd5 (better 24.f4 a6+-) 24...Nc5 25.f4 (25.Qb5 h6+-) 25...Ned7 26.Nc6 Qf4?? (better 26...Qb7 27.Qf3 Nf6+-) 27.Nf4 (27.ef4?! Re2 28.Nde7 Kh8 29.Rc5 bc5 30.Rd7 Bd4 31.Nd4 cd4+-) 1-0. opperwezen (2720) - Calanthe (2295), lichess.org, 2018. (=1.h3 d5 2.b4 Nf6 3.Bb2)

4.Nf3 Bg7 5.e3 0-0 6.d4 b6 7.c4 dc4 8.Bc4 Bb7 9.Nbd2 Nbd7 10.Qb3 e6 11.b5 c5 12.bc6 Bc6 13.0-0 Qc7 (13...b5 14.Bd3= (worse 14.Bb5 Bb5 15.Qb5 Rb8-/+)) 14.a4 Qb7 15.Rfc1 Rac8 16.Rc2 Rfd8 17.Rac1 Nd5 18.e4 Nf4 19.g3 (19.Kh2 Nf6 20.g3 Bh6+/-) 19...Nh3 20.Kh2 (better 20.Kg2 Nf2 21.Be6 fe6 22.Qe6 Kh8 23.Rc6 Rc6 24.Qc6 (worse 24.Rc6 Nf8 25.Qc4 Nd1-/+) 24...Qc6 25.Rc6+/-) 20...Be4?? (20...Nf2 21.Be6 fe6 (21...Be4 22.Ne4 Rc2 23.Rc2 Ne4 24.Bf7 Kh8 25.Bd5+-) 22.Qe6 Kh8=) 21.Ne4+/- Qe4 22.Kh3 Nf6? (22...Qb7 23.Be6! Rc2 24.Bf7 (24.Rc2?! fe6 25.Qe6 Kh8+=) 24...Kh8 25.Rc2+- (worse 25.Qc2 Qf3 26.Bc4 Rc8=+)) 23.Kg2 (23.Be6 Rc2 24.Bf7 Kh8 25.Rc2 Rf8+-) 23...Ng4?? (23...Qb7 24.a5! Rb8 25.a6+-) 24.Re2 (better 24.Be6 Rc2 25.Bf7 Kh8 26.Qc2+-) 24...Qb7 (24...Qa8 25.Be6! fe6 26.Qe6 Kh8 27.Qg4 Rc1 28.Bc1 Rd4 29.Qe6+-) 25.Re6! Rc4 (25...fe6 26.Be6 Double attack) 26.Qc4 fe6 27.Qe6 Kh8 28.Qg4 Rf8 29.Re1 a5 (29...Qd5 30.Ba3 Rd8 31.Qe6 Qe6 32.Re6+-) 30.Re2 (30.Ba3 Rd8+-) 30...h5 (30...Qc6 31.Ba3 Re8 32.d5+-) 31.Qe4 Qc8 (31...Qe4 32.Re4 b5+-) 32.Qg6 (32.Nh4!? Rf7 33.Ng6 Kg8 34.Ne7 Re7 35.Qe7 Qc6 36.f3 Qg6+-) 32...Qf5 33.Qf5 Rf5 34.Ne5 Be5 (34...Kg8 35.d5+-) 35.de5 Rf8 36.f4 Re8 (36...Kg8 37.e6+-) 37.e6 Kg8 38.f5 Kf8 39.f6 Re6 1-0. opperwezen (2705) - Calanthe (2310), lichess.org, 2018. (=1.h3 d5 2.b4 Nf6 3.Bb2)

4.Nf3 Bg7 5.g4 0-0 6.g5 Ne4 7.Bg7 Kg7 8.d3 Nd6 9.Nbd2 e6 10.Ne5 (better 10.c4!?=) 10...Qg5-/+ 11.Ndf3 Qf6 12.h4 h5 13.Rg1 Nd7 14.d4 b6 15.Nc6 Ba6 16.Nce5 Qf5?? (better 16...Qe7-/+) 17.Nd7+- Rad8? (17...Rfd8 18.Nde5+-) 18.Nde5 (better 18.Nf8 Rf8 19.Ne5 Nc4+-) 18...f6?? (18...Nc4 19.a4+-) 19.Nc6 (better 19.Ng6 Qg6 20.Rg6 Kg6 21.Qc1+-) 19...Rde8 (19...Rd7 20.e3 Bf1 21.Rf1 a6+-) 20.e4?? (better 20.Na7 Rf7 21.a4+-) 20...Qe4+= 21.Kd2 Nc4?? (21...Bf1 22.Rf1 Qf4 23.Kc3=) 22.Kc1?? (better 22.Kc3 Qf4 23.Bd3+-) 22...Bb5 23.Na7 Ba4 (23...Qf4 24.Nd2 Qd4 25.Rb1 Qf2 26.Rg2 Qh4 27.Nb5+=) 24.Bc4 (24.Qd3!? Qf4 25.Nd2+-) 24...dc4+= 25.Nd2?? (better 25.b5+=) 25...Qd4-/+ 26.Rb1? (better 26.Kb1 Rd8 27.Qh5-/+) 26...b5?? (better 26...c3 27.Re1 cd2 28.Qd2 Qd2 29.Kd2 Ra8 30.Re6 Ra7 31.Re7 Rf7 32.Rf7 Kf7-+) 27.Qh5+- g5 (27...Bc2 28.Nb5 Qd3+-) 28.hg5 f5 29.Qh6 Kg8 30.Rh1 Qg7 31.Nc6 Rf7 (31...Qh6 32.Rh6 c3 33.Ne5+-) 32.Nf3 e5 (32...Qh6 33.gh6 Rf6 34.h7 Kh8 35.Kb2+-) 33.Qg7 (better 33.Nfe5!? Qh6 34.gh6 Rf6 35.h7 Kh8+-) 33...Rg7 34.Nce5 Rg5 (34...Rge7 35.Re1 c3 36.Re3+-) 35.Ng5 Re5 36.f4 (better 36.Kd2!? c5+-) 36...Re2 37.Rb2 (better 37.Kb2 Bc2 38.Rbe1 Re1 39.Re1 Bd3+-) 37...c3 38.Rb3! Bb3 39.ab3 Rf2 40.Ne6 Kf7 (40...c6 41.Rd1+-) 41.Nc7 Ke7 (41...Rf4 42.Nb5 Rb4 43.Nc3+-) 42.Nb5 Ke6 43.Nc3 Kd6 (43...Rf4 44.b5+-) 44.Kb2 (44.Rh6 Kd7 45.Nd5 Rf1 46.Kb2 Rf2+-) 44...Kc6 (44...Rf4 45.Rd1 Ke5 46.Re1 Kd6 47.Nb5 Kd7 48.Rd1 Ke7 49.Nd4+-) 45.b5 Kb6 (45...Kc5 46.b4! Kb4 47.b6+-) 46.Rh6 Kc5 (46...Kb7 47.Na4 Kc8 48.b6 Rf4 49.Nc5+-) 47.Rf6 (better 47.Rc6 Kd4 48.b6 Rd2+-) 47...Kd4 (47...Rf4 48.Rc6 Kb4 49.b6+-) 48.Rf5 (48.Rd6 Ke3 49.Nd1 Kf3 50.Rd3 Ke2 51.Nf2 Ke1 52.Nd1 Ke2 53.b6 Kf1 54.b7 Kg1 55.b8Q Kg2 56.Qg8 Kf1 57.Qg3 Ke2 58.Qf2) 48…Rf3 (48...Rf3 49.Rd5 Ke3 50.Rd3 Kf4 51.Rf3 Kf3+-). beatmeeasy (1890) – EnriqueVeloz (1855), lichess.org, 2021.

4.Nf3 e6 5.a3 Be7 6.Nd4 0-0 (6...Bg4!?-/+) 7.Nf5= ef5 8.c3 Nc6 9.Qc2 Qd7 10.g3 Ne5 11.Bh3 Nfg4 12.d3 Qd6 13.f4? (better 13.Nd2!? Qe6 14.d4=) 13...Ne3 14.Qd2 N5g4 15.Bg4 Ng4 16.h5 h6 17.0-0 g6 (17...Qb6 18.d4-+) 18.hg6 Qg6 (18...Qb6 19.Kh1 fg6 20.e3-/+) 19.c4 (19.e3 Rfe8 20.Re1 Bf6-/+) 19...Qh5 20.Rf2 (better 20.e3!? dc4 21.dc4-/+) 20...Nf2-+ 21.Kf2 Qh2 22.Kf3 Kh7 23.Qc3? (23.Qe1 dc4 24.dc4 Rg8-+) 23...f6 (better 23...Rg8 24.Ke3 Rg3 25.Kd2 Re8-+) 24.Nd2 Rg8 (24...Rae8 25.Re1 c5 26.Nf1 Qh1 27.Kf2-+) 25.Nf1-/+ Qh5 26.Ke3 (26.Kf2 dc4 27.Qc4 c6-/+) 26...Rad8 (better 26...Rge8!? 27.Kd2 d4 28.Qd4 Bb4 29.Kc1 Qe2 30.ab4 Rad8-+) 27.cd5-/+ Rd5 28.Qc7 Qf7 29.Rc1 b6 (29...Bc5 30.Rc5 Rd7 31.Qd7 Qd7 32.Bf6-/+) 30.Kf3 (worse 30.Qa7 Bc5 31.Rc5 Re8 32.Kf2 Qa7 33.Rd5 Qe7-+) 30...h5 (30...Rg7 A) worse 31.Qa7 Qh5 32.Kf2 Bc5 33.Rc5 Rc5 (33...bc5?! 34.Qa8 Qf7 35.Ne3=) 34.Qg7 Kg7 35.bc5 bc5-/+; B) 31.Qc6=) 31.Rc6 Attacking the isolated pawn on f6 (31.Qa7 Rd6 32.Kf2+-) 31...Rg6?? (better 31...Rg7!? 32.Qc8 h4=+) 32.Ne3 (32.Qa7!? h4 33.Qb6+-) 32...Rd8 33.Nf5 Qe6?? (33...Qd5 34.Kf2 Rd7 35.Ne7 Rc7 36.Rc7 Qh1 37.Ng6 Kg6+-) 34.Qe7 (34.Re6 Rdg8 35.Re7 R6g7 36.Rg7 Rg7 37.Qg7) 34...Qe7+- 35.Ne7 Rg7 36.Bf6 Rf7 37.Bg5 Rd7 38.Rh6 Kg7 39.Nc8 (39.Nc6 Rf8+-) 39...Rc7 (39...Rf8 40.Nd6+-) 40.Nd6 Rfd7 (40...Rf8 41.Rh5 Kg8 42.e4+-) 41.Ne4 (better 41.Ne8!? Kg8+-) 41...Rc2 (41...Rf7 42.Nf6 Rf6 43.Rf6+-) 42.Rh5 Ra2 (42...Rf7 43.g4+-) 43.Bf6 Kg6 (43...Kf7 44.g4 Rc2 45.f5+-) 44.Rg5 (better 44.f5 Kf7 45.g4 Rd5+-) 44...Kf7 45.Rg7 (better 45.g4+-) 45...Ke6 (45...Ke8 46.Rg8 Kf7+-) 46.f5 Kf5 47.Rd7 Ra3 (47...Rd2 48.g4 Ke6 49.Rd6 Kf7 50.Ng5 Kg6 51.Kf4 Rd3 52.Bd4) 48.g4 Ke6 49.Rg7 (49.Rd6 Kf7 50.Ng5 Kg6 51.Kf4 Rd3 52.Bd4) 49...a5 50.Re7 Kd5 51.Re5 (51.b5 Rd3 52.ed3 a4 53.Ke3 a3 54.Re5) 51...Kc6+- 52.ba5 (52.b5 Kc7 53.Re7 Kc8 54.Nd6 Kb8 55.Rd7 Rb3 56.Be5 Rb5 57.Nb5 Kc8 58.Rc7 Kb8 59.Re7 Kc8 60.Na7 Kd8 61.Nc6 Kc8 62.Rc7) 52...ba5 53.Be7 (53.g5 Rb3 54.Re6 Kd7 55.Nc5 Kc7 56.Nb3 Kb7 57.Nc5 Kc7 58.g6 a4 59.g7 Kb8 60.g8Q Kc7 61.Qd8) 53...Ra1 54.g5 Kd7 55.Bf6 (better 55.g6 Rg1 56.Ng3 Rb1+-) 55...a4 56.Re7 Kd8 57.Ba1 (57.Rb7 Ke8 58.Nd6 Kf8 59.Rb8) 57...Ke7+- 58.g6 Ke6 59.g7 Kf7 60.Ng5 (60.Nd6 Kg8 61.Nf5 Kf7 62.Nh6 Ke7 63.g8Q Kd7 64.Qb8 Kc6 65.Qc8 Kb5 66.Qb7 Kc5 67.Nf5 a3 68.Bd4) 60...Kg8 61.d4 (61.Ne6 a3 62.d4 Kh7 63.d5 Kh6 64.g8Q a2 65.Qg5 Kh7 66.Qg7) 61...a3 62.d5 a2 63.d6 (63.Ne6 Kf7 64.e3 Kg8 65.d6 Kf7 66.d7 Ke7 67.d8Q Ke6 68.g8Q Kf5 69.e4) ½–½. beatmeeasy (1945) – salchak17rus (2000), lichess.org, 2021.

4.Nf3 h6 5.Nd4 Bh7 6.Na3 (6.a3 e5 7.Nf3 e4=+) 6...e6 (6...e5!? 7.Nf3 e4 8.Nh2-+) 7.c3 a6 8.b5 (8.e3 e5 9.Nf3 Nbd7-/+) 8...c5 (8...ab5 9.Nac2-+) 9.Nf3 a5 (9...c4 10.ba6 Qb6 11.Qa4 Nc6 12.Qb5 Ra6 13.Qb6 Rb6 14.Bc1-+) 10.Qa4 b6 (10...Bd6 11.c4=+) 11.Ne5 (11.c4 Bd6=) 11...Be7 12.Nc6 (12.c4 d4=+) 12...Nc6-/+ 13.bc6 Qc7 (13...Rc8 14.g4-/+) 14.e3 (14.Nb5!? Qc8 15.g4=+) 14...0-0-/+ 15.g4 Ne4 16.d3 Nd6 17.g5 h5 18.Rg1 Bg6 19.f4 (better 19.c4!?-/+) 19...b5!-+ 20.Nb5? (better 20.Qd1-+) 20...Nb5 21.Qb5 (21.c4 Na7 22.Be5 Bd6 23.Bd6 Qd6 24.cd5 ed5 25.Qa5 Rfe8-+ (worse 25...Qc6 26.Qc3-+)) 21...Rfb8 22.Qa4 Rb2 23.e4 (23.Rg2 Rg2 24.Bg2 Bd3 25.Bf1 Bf1 26.Kf1-+) 23…Qf4 (23...Qf4 24.Rg2 Qh4 25.Kd1 Rg2 26.Bg2 Qf2-+) 0–1. beatmeeasy (1930) – S_Vik (1900), lichess.org, 2021.

4.Bf6 ef6 5.a3 Bd6 6.Nf3 Nd7 7.Nd4 Be6 8.h5 h6 9.c3 c5 10.Nc2 cb4 11.cb4 Rc8 12.e3 a6 13.d3 Qc7 14.Nd4 Be5 15.Ne6 fe6 (15...Bc3 16.Nc3 Qc3 17.Ke2 fe6 18.d4=+) 16.d4= Bd6 17.Bd3 0-0 18.Rh3 e5 19.Bf5 ed4 (19...Kh8=+) 20.Be6 (better 20.Qd4!? Qc1 21.Qd1+=) 20...Kh8-/+ 21.Bd5 de3 22.fe3 Bg3 23.Kf1 Qe5 (23...Nb6 24.Rg3 Qg3 25.Bb7 Qe3 26.Bc8 Qf4 27.Kg1 Rc8 28.Nd2-+) 24.Rg3 (24.Nd2!? Qd5 25.Rg3-/+) 24...Qg3-/+ 25.Bf3?? (25.Bb7!? Rc7 26.Ba6-+) 25...Qe5 (better 25...Ne5 26.Nd2 Rfd8 27.Bb7-+) 26.Ra2 Qe3 27.Re2 Qc1 28.Qc1 Rc1 29.Re1 Re1 30.Ke1 Ne5?? (better 30...Rb8-+) 31.Bb7=+ Re8 (31...a5!? 32.ba5 Nd3 33.Kd2 Nc5-/+) 32.Ba6= Nd3 33.Kd2 Nf4 34.g4 Re2?? (34...f5 35.gf5 Nh5 36.a4=) 35.Kc3 (better 35.Be2 Ne6 36.a4+-) 35...Ra2 (35...Rg2 36.Bc8=) 36.Kb3 Ra1?? (better 36...Rg2 37.Bc8 g6=) 37.Kb2+- Rb1 38.Kb1 Nd5 (38...Kg8 39.a4 Kf8 40.a5+-) 39.b5 (39.Bc4!? Nb6 40.Bb3 g6 41.hg6 Kg7+-) 39...Kg8 40.Bb7 (40.Kc2 Kf8+-) 40...Nb6? (better 40...Nc3!? 41.Kc2 Nb5+-) 41.Bc6 (41.Kc2 Kf7+-) 41...Kf8 42.Kc2 Ke7 (42...Nc4 43.a4 Ke7 44.Kc3+-) 43.Kb3 Kd6 44.Kb4 Nd5 (44...Nc8+-) 45.Bd5 Kd5 46.a4 (46.a4 f5 47.a5 fg4 48.a6+-) 1–0. beatmeeasy (1900) – ommmmmm (1840), lichess.org, 2020.

4.c3 h6 5.Nf3 Be7 6.Rg1 0-0 7.g4 Nh7 8.Rh1 b6 9.e3 Bb7 10.d4 c5 11.a3 Nd7 12.Bd3 Ndf6 (12...c4 13.Bc2=+) 13.Bh7 (13.g5!? Ng4 14.Qc2=) 13...Nh7=+ 14.Bc1 Rc8 15.Nbd2 cb4 16.ab4 Rc3 17.Ra7 Qb8 18.Rb7? (better 18.Ra1-/+) 18...Qb7-+ 19.Bb2 Rcc8 20.Rg1 (20.b5 Qc7 21.Ne5 Qc2-+) 20...Qc7 (20...Bb4 21.Qb3 Qe7 22.g5-+) 21.g5 (21.b5 Qc2 22.Ba1 Qd3-+) 21...hg5 (21...Bb4?! 22.gh6 g6 23.h5-+) 22.Ng5 (22.hg5 Bb4 23.Qb3-+) 22...Ng5 (worse 22...Bb4 23.Qb3 Bd2 24.Kd2-+) 23.hg5 Qc2 (worse 23...Bb4 24.Rh1 Qc2 25.Qh5 Qd2 26.Kf1 Qd3 27.Kg2 Qe4 28.Kf1 Qh1 29.Qh1-+) 24.Qc2 Rc2 (24...Rc2 25.Ba3 Rfc8-+) 0–1. beatmeeasy (1950) – scutmb (2045), lichess.org, 2021.

4.ba5 c5 5.h4 Nc6 6.f4 e5 7.f5 Be6 8.Rh3 g6 9.e4 Bd6 10.Qg4 Na5 11.fg6 Ke7 12.Bd3 Nb3 13.Qf3 Nh5 14.Be5 Rc8 15.Bf1 Nf4 16.c4 hg6 17.Bd4 Qg8 18.Ke2 Bg4 19.Bc3 f5 20.Ba5 Ke8 21.Kd1 Qf7. NoTheories (2130) - konakjan (2145), Rated Bullet game, lichess.org, 2015.

4.b5 b6 5.e3 Bb7 6.a4 (6.Bf6 ef6 7.d4 Bd6+=) 6...Nbd7 7.Nf3 e6 8.d4 Bd6 9.Bd3 0-0 10.0-0 Ne4 11.Nbd2 f5 12.Ne5 Be5 13.de5 c5 14.bc6 Bc6 15.c4 (15.Nb3 Nec5=) 15...Ndc5 Attacking the isolated pawn on a4 (15...Nd2!? 16.Qd2 Nc5-/+) 16.Be4= fe4 17.cd5 (17.Bd4 Rc8=) 17...Bd5 (17...ed5!? 18.Bd4 Qe8=+) 18.Ba3 Rf5 19.Rc1 (better 19.Bc5!? bc5 20.Qc2=) 19...Nd3-/+ 20.Rb1 Ne5 21.Nb3 (21.Bb2 Nd3 22.Bd4 Qh4=+) 21...Qh4 (better 21...Bc4 22.Qd8 Rd8-+) 22.Nd4?? (better 22.Bd6 Rd8 23.Be5 Re5 24.Qe2-/+) 22...Rh5-+ 23.h3 Nf3!! 24.Kh1 (24.Nf3 ef3 Decoy; 24.gf3 Qh3 Mate attack) 24...Qg4 25.Nf3 (25.Qf3 ef3 26.Nf3 Bf3 27.gf3 Rh3) 25…ef3 (25...ef3 26.Qf3 Bf3 27.gf3 Rh3) 0-1. Legenia,Artem (2140) - Pajeken,Jakob Leon (2305), Titled Tuesday 6th Apr, 2021.

4.b5 c5 5.e3 b6 6.Nf3 e6 7.Be2 Bb7 8.0-0 Nbd7 9.c4 Be7 10.d3 0-0 11.Nbd2 Rc8 12.Qc2 Re8 13.Rac1 Bf8 (13...Bd6 14.Rce1=) 14.Ne5 Ne5 15.Be5 Nd7 16.Bb2 e5 (16...Bd6 17.f4=) 17.cd5 (17.Bf3 Nf6=) 17...Bd5= 18.Bf3 Bf3 19.Nf3 f6 (19...Bd6 20.Nd2=) 20.Qc4+= Kh8 21.Rfd1 Bd6 22.Qf7 Qe7 23.Qc4 Nf8 (23...Qd8 24.Nh4+=) 24.Nh4 g6 (24...Qe6 25.h3=) 25.Nf3+= Ne6 26.h4 h5 (26...Kg7 27.h5=) 27.Qe4 Kg7 28.d4 (28.a4 Qa7+=) 28...cd4 (28...ed4 29.ed4 Nf4 30.Qe7 Re7 31.Rc4=) 29.Rc8+= Rc8 30.ed4 f5 (30...Ba3 31.Ba3 Qa3 32.de5=) 31.Qd5 (31.Qe3!? Rc2 32.Bc1+/-) 31...e4= 32.Ng5 (better 32.Qb3!?=) 32...Ng5-/+ 33.hg5 Rd8 (33...e3 34.Qb3 ef2 35.Kf2 Qe4-/+ (35...Qg5?! 36.a4-/+)) 34.Qc6+= Qg5 35.d5 Kh6 (35...Kf8!? 36.Qb6 Ke8 37.Qc6 Rd7+/-) 36.Qb7 Qe7 37.Qb6 Rb8 (better 37...a4+/-) 38.Qd4 (better 38.Qa5 e3 39.Bc1+/-) 38...Rb5= 39.Qh8 Kg5 40.Bc1 f4 Black intends e3 41.g3 e3 (41...Rc5 42.gf4 Kf5 43.Qd4=+) 42.fe3= fe3 43.Re1 (43.Qc3 Kh6 44.Qd3 Rb7 45.Be3 Kh7=+) 43...Bg3 (better 43...Bc5 44.Qc3 Qe4=+) 44.Re3+/- Qa7?? (better 44...Qc5 45.Kg2 Bf4 (45...Qc1?? 46.Rg3 Kf5 47.Qf8 Ke5 48.Qe8 Kd4 49.Qb5 Qc2 50.Kg1 Qc1 51.Kh2 Qd2 52.Kh3+-) 46.Rg3 Kf5 47.Bf4 Qd5 48.Rf3 Kg4 49.Qc8 Qf5 50.Rg3 Kf4 51.Qc4 Qe4 52.Rf3 Ke5 53.Qb5 Ke6 54.Qb3 Kd7+-) 45.Kg2+- Bf4 (45...Qe3 46.Be3 Kf5 47.Qc8 Ke4 48.Kg3 Rd5 49.Qc4 Ke3 50.Qd5 h4 51.Kh4 a4+-) 46.Re5 Kh4 47.Bf4 (47.Rh5! Kg4 48.Rh4 Kg5 49.Bf4 Kf5 50.Qe5) 47...Rb2-+ 48.Kf3 Qf2 49.Ke4 Qc2 50.Kf3?? (50.Kd4 Qa4 51.Kc5 Qa3 52.Kc6 Qa4 53.Kd6 Qf4 54.Qd8 g5 55.Ke6-+) 50...Qg2 51.Ke3 Re2 (51...Rb3 52.Kd4 Qb2 53.Kc5 Rc3 54.Kd4 Ra3 55.Kc5 Rc3 56.Kd6 Qb6 57.Ke7 Rc7 58.Kf8 Qd6 59.Re7 Qe7 60.Kg8 Qd8) 52.Kd4+- Rd2? (52...Re5 53.Qe5 Qb2 54.Ke4 Qb1 55.Ke3 Qg1 56.Kd3 Qd1 57.Kc3 Qa1 58.Kb3 Qd1 59.Kb2 Qd3+-) 53.Kc5 (better 53.Bd2 Qd2 54.Kc5 Qc3 55.Kb6 Qd4 56.Kb7 g5+-) 53...Rc2 (53...Qg1 54.Be3 Rc2 55.Kd6+-) 54.Kd6 Qg4 (54...Rc3 55.Qf6 Kh3 56.Rg5+-) 55.Bg5 (better 55.Qf6 Kh3 56.Re3 Kg2 57.Rg3 Qg3 58.Bg3+-) 55...Kh3 56.Re3 (56.Qf6 Rc3 57.Qg6 Ra3+-) 56...Kg2 57.Qe5 Rf2 58.Qe4 (better 58.Bd8+-) 58...Kf1 (58...Qe4 59.Re4 Rf5+-) 59.Qg4 (59.Re1) 59...Rf6 (59...hg4 60.Ke6 Rf8+-) 60.Bf6 (60.Bf6 hg4 61.Kc5+-) 1-0. newlife10 (2170) - konakjan (2165), Rated Blitz game, lichess.org, 2014.

4.b5 c6 5.e3 Bf5 6.Nf3 e6 7.Nc3 Be7 (7...Bd6 8.Be2=) 8.Ne2 0-0 9.Ng3 Bg6 10.a4 Nbd7 11.Ne5 (11.Nh4 e5=) 11...Ne5=+ 12.Be5 Nd7 13.Bb2 Bf6 14.Bf6 Qf6 (worse 14...gf6 15.h4 h6 16.d4+=) 15.c3 c5 16.d4 cd4 17.cd4 Rac8 18.Bd3 Rc3 19.Bg6 Qg6 20.0-0 Rfc8 21.Qd2 Qc2 22.Qc2 (22.Qe1 Qb3=+) 22...Rc2-/+ 23.Nh5 R8c4 24.Nf4 R2c3 25.g4 (25.Rfd1 Nb6-/+) 25...Nb6-/+ 26.Ne2 (26.Ra2-/+) 26...Rb3 (26...Rc2 27.Nf4 Na4 28.Nd3-+) 27.Nf4? (better 27.Nc1 Rbb4 28.Nd3 Ra4 29.Nc5 Ra1 30.Ra1=+) 27...Na4-+ (27...Ra4?! 28.Ra4 Na4 29.Ra1-/+) 28.Rfc1 Rc1 (28...Nb6 29.Rcb1 Rb1 30.Rb1-+) 29.Rc1 Nc3 30.Kg2 g5 31.Nd3 a4?? (better 31...b6-+) 32.Nc5= Ra3 33.Nb7?? (better 33.b6 Ne4 34.Ne4 de4 35.Rc7=) 33...Nb5-+ 34.Rc8 Kg7 35.Ra8 Ra1 (35...Ra2!? 36.Nc5 a3 37.Ra5-+) 36.Ra5-/+ Nc3 37.Nd6 (37.Ra7!? a3 38.Nd8-/+) 37...a3-+ 38.Nb5 Nb1 (38...Nb5 39.Rb5 h5 40.h3-+) 39.Kf3 (39.Ra7!? a2 40.h3-+) 39...Nd2 40.Kg2 Nc4 41.Ra7 a2?? (better 41...Kg6-+) 42.Nc3=+ Rc1 43.Na2 Rc2 44.Kg3? (better 44.Kg1=+) 44...Nd2-+ 45.Nb4 Ne4 46.Kg2 Rf2 47.Kg1 Rf3 48.Nc6 (48.Ra3!?-/+) 48...Re3-+ 49.Ne5 Nd6 50.Rd7 Nc4 (better 50...Nb5 51.Rf7 Kg8-+) 51.Nf7=+ Kf6 52.Nd8? (better 52.Nh6=+) 52...Re4-+ 53.Nc6? (better 53.h3 Nd2 54.Kf2-+) 53...Rg4 54.Kf2 Rf4 55.Kg3 h5 (55...Ne3 56.Rh7 Nf5 57.Kg2-+) 56.h3 (56.Rd8 Kf5 57.h3 h4 58.Kh2 Nd2 59.Rf8 Ke4-+) 56...h4 57.Kg2 (57.Kh2 Nd2 58.Rd8 Nf3 59.Kg2 Kf5 60.Rf8 Ke4-+) 57...Ne3 58.Kg1 (58.Kh2 Nf5-+) 58...Kf5 (58...g4!? 59.hg4 Nc2 60.Kh2 Rg4 61.Kh3-+) 59.Rf7 Ke4 60.Rf4 (60.Re7 Rf1 61.Kh2 Rf2 62.Kg1 Rg2 63.Kh1 Kf3-+) 60...gf4 61.Ne5 (61.Nd8 Kf5-+ (worse 61...Kd4 62.Ne6 Ke5 63.Ng5-+)) 61...Kd4 62.Nf3 (62.Ng6 Ke4 63.Nh4 f3-+) 62...Ke4 (62...Kc3 63.Nh4 d4 64.Nf3-+) 63.Nh4 (63.Ng5 Kf5 64.Nf3 e5 65.Nh4 Ke6-+) 63...d4 64.Kf2 d3 65.Nf3 Nf5 (65...Nd1 66.Kg2 e5 67.h4 Ne3 68.Kf2 Ng4 69.Kg2-+) 66.h4 e5 67.h5 Kd5 68.Ne1 e4 69.Kf1 (69.Nd3 ed3 70.h6 Nh6 71.Kf3-+) 69...d2 (better 69...Ng3 70.Kg2 d2 71.Nd3 ed3 72.Kh3 d1Q 73.h6 Qh5 74.Kg2 Qh1 75.Kf2 Ne4) 70.Ke2 de1Q (70...e3 71.Nd3 f3 72.Kd1-+) 71.Ke1 Nh6 72.Kf2 Kd4 73.Ke2 If White now would get f3+ in, he might survive 73...f3 74.Kf2 Kd3 75.Kg3 Black now must not overlook the idea e3 75...Ke3 76.Kh4 (76.Kh2 f2 77.Kg2 Ke2 78.Kh3 f1Q 79.Kh2 Qf3 80.Kg1 Ng4 81.h6 Qf1) 76...Kf4-+ 77.Kh3 e3 78.Kh2 e2 79.Kh3 e1Q 80.Kh2 Qh4 (80...Qf2 81.Kh3 Qg3) 81.Kg1 Kg3 82.Kf1 Qh1 0-1. black_bishop_88 (2645) - samisahi (2555), Quarantε³ne-Bundesliga Team Battle, lichess.org, 2020. (=1.a3 Nf6 2.b4 d5 3.Bb2)

4.b5 Qd6 5.Nf3 Nbd7 6.e3 (6.d4 Nb6=) 6...e5=+ 7.d4 e4 8.Nfd2 Be7 9.c4 c6 10.Be2 (10.cd5 cd5 (< 10...Qd5 11.Nc3 Qe6 12.Bc4+/–) 11.a4 Qb6=) 10...0-0 (10...cb5 11.cd5 0-0 12.Bb5+=) 11.Nc3 Qe6 12.Rc1 Rd8 (12...Qf5 13.c5=) 13.Qb3 (13.cd5 cd5 14.0-0 Bd6=) 13...Qf5 14.cd5 (14.0-0 Qg5=) 14...cd5 15.Na4 Qg6 16.g3 (16.0-0 Bd6=) 16...Bd6 17.f4 ef3 18.Bf3 Ne4 19.Ne4 (19.Rf1 Ndf6 20.Nb6 Bh3=+) 19...de4 20.Bg2 Nf6 21.Nc3 (21.Nb6 Be6 22.Qc2 Rab8=+) 21...Ng4 (21...Be6 22.Qc2 Rac8 A) 23.Be4? Ne4 24.Qe4 Rc3 25.Qg6 Rc1 (25...fg6? 26.Rc3 Bd7 27.b6+-) 26.Bc1 hg6-+; B) 23.0-0=+) 22.Be4= Qh6 23.Ne2 (23.Nd1 Nh2 24.g4 Bg4 25.Bb7 Bg3 26.Kd2 Rab8-+) 23...Re8 24.Rf1 (24.Bd5 Re3 25.Rc3 Be6-/+) 24...Be6 25.Qd3 Re7 (25...Ne3 26.Rf3 Ng2 27.Kf1 Qh2 28.Ng1-/+) 26.Rc3 Qh2 27.Qb1 (27.Kd2 h6 28.d5 Bd7-/+) 27...Rae8 28.Rh1 Qf2 (28...Bg3?! 29.Kd2 Qf2 30.Bh7 (30.Rh7?? Bc4 31.Qh1 Qe2 32.Kc1 Qf1 33.Qf1 Bf1-+) 30...Kf8 31.Be4=) 29.Kd2 (Now all is on h7) 29...Bc4! 30.Bh7 (30.Rc4 Qe3) 30...Kf8-+ (With the decisive threat Rxe3) 31.Qe1 Qe1 32.Re1 Ne3 33.Kc1 Ng2 (34.Rg1 Bd5-+ (34...Bb5?! 35.Rg2 Re2 36.Re2 Re2 37.Bc2-/+)) 0–1. Baer,Werner – Rushton,Darren, Tigerschachclub, 2002.

4.b5 Nbd7 5.f4 e6 6.Nf3 Bd6 7.e3 0-0 8.Bd3 c5 9.bc6 bc6 10.g4 (10.Ne5 c5=+) 10...Ne4 (10...Rb8 11.Bc3-/+) 11.Be4 de4 12.Ng5 h6 (12...Nc5!?=+) 13.Ne4= Qh4 14.Kf1 Ba6 (14...Bc7 15.Kg2=) 15.Kg2 Bc7 16.Nbc3 (16.Qf3 Rab8 17.Bd4 Rfd8=) 16...c5 (better 16...e5=) 17.Ne2?? (better 17.Qf3+=) 17...Bb7-+ 18.N2g3 f5 19.gf5 ef5 20.d3 fe4 21.de4 Nf6 (21...Nb6 22.Rg1-+) 22.Bf6 Qf6 23.Qd7 Rf7 24.Qg4 (24.Qb5 Bd6-+) 24...Re8 25.Kf3 (25.Qf3 Be5 26.Rad1 Bb2-+) 25...Qc6 (better 25...Qc3 26.Kf2 Be4-+) 26.Nh5 (26.Kf2-+) 26...Re4 (26...Qe4 27.Kg3 Qg2 28.Kh4 Bd8 29.Nf6 Bf6 30.Kh5 Bf3 31.h3 Kh7 32.f5 Re4 33.Rag1 Rg4 34.Rg2 Rg2) 27.Kf2 Bf4! 28.Rhg1 (28.ef4 Qa4 Combination; 28.Nf4 g5 Decoy) 28...Bg5 (28...Be3 29.Kg3 Rg4 30.Kh3 Qf3 31.Rg3 Rg3 32.Ng3 Bc8 33.Kh4 g5) 29.Ke2 Re3 30.Kd2 Qd7 (30...Rf2 31.Kc1 Rc3 32.Kb1 Qb6 33.Qb4 Rb3 34.Ka2 Ra3 35.Qa3 Rc2 36.Qb2 Qb2) 31.Kc1 (31.Qd7 Ra3 32.Ke2 Re3 33.Kd1 Rd7 34.Kc1 Bf3 35.Rg5 hg5 36.Ra5 c4 37.Rg5 c3 38.Nf6 Kf7 39.Rg7 Kg7 40.Ne8 Re8 41.Kb1 Rb8 42.Kc1 Rd1) 31...Qg4 (31...Ref3 32.Nf4 Bf4 33.Qf4 R3f4 34.Rd1 Rf1 35.Kb2 Rd1 36.Rd1 Qd1 37.a4 Qd4 38.Kb3 Bd5 39.c4 Rf2 40.cd5 Qd3) 32.Rg4 Re1 (better 32...Bf3 33.Rg5 hg5 34.Kd2 Re2 35.Kc3 Bh5 36.Rc1-+) 33.Kb2 Ra1 (33...Re2 34.Rag1 Rff2 35.Kb3 Rc2 36.Ka4-+) 34.Ka1 Bf6 (better 34...Rf1 35.Kb2 Bf3 36.Rg5 hg5 37.Ng3-+) 35.Nf6 Rf6 36.Rc4 Bd5 (36...Rf5!? 37.Ra4-+) 37.Rc5 Rf1 (37...Rf1 38.Kb2 Be4-+) 0-1. wigglewiggle (2065) - Berthe (2385), Rated Bullet game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...Nf6 2.b4 d5 3.Bb2)

4.b5 e6 5.e3 Nbd7 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7).

4.e3 c5 5.b5 b6 6.a4 e6 7.c4 Bb7 8.cd5 Nd5 9.Nc3 Nd7 10.Nd5 Bd5 11.Nf3 f6 12.Qc2 Kf7 13.Bc4 Bd6 14.Bd5 ed5 15.Qf5 Ne5 16.0-0 Nf3 17.Qf3 Bc7 18.d4 c4 19.Ba3 Re8 20.Rae1 Kg8 21.Qh3 Qc8 22.Qf3 Qe6 23.Re2 Rad8 24.Rfe1 Bd6 25.Bb2 Rd7 26.e4 Rde7 27.e5 fe5 28.de5 Bc5 29.Qh5 d4 30.Kh1 d3 31.Re4 Bb4 32.Rd1 c3 33.Bc3 Bc3 34.Rd3 Bb4 35.h3 Bc5 36.Rd5 Qd5 37.Rh4 Qd3 38.Qg5 Bf2 39.Rh7 Qd1 40.Kh2 Qg1 0-1. James_Flynn (2160) - angusss (2200), Rated Bullet game, lichess.org.

4.e3 Bf5 5.b5 e6 6.f4 c6 7.a4 (7.Nf3 Bc5=) 7...Bc5 8.Nf3 Qb6 (8...0-0 9.Bd3=+) 9.Be2= Ng4 (better 9...0-0!?=) 10.Nd4+- Nf6 (10...Nh6!?+-) 11.Nf5+- ef5 12.0-0 (better 12.Bf6!? gf6 13.d4 Bb4 14.c3+-) 12...Nbd7+= 13.c4 (13.d4 Be7+=) 13...0-0= 14.d4 Bb4 15.c5 Qd8 16.Bc3 (16.Nc3 Re8 17.Qd3 Qe7=) 16...Re8 (16...Qe7 17.Rf3 Ng4 18.Bd2=+) 17.Bb4 ab4 18.Qd2 (18.Qb3 Qe7 19.Rf3 Ng4 20.Qb4 Qh4=+) 18...cb5 (18...Qa5 19.Bd3-/+) 19.Qb4=+ Re3 (19...ba4 20.Ra3=) 20.Bb5= Ne4 (20...Nf8 21.Na3=) 21.Nd2 Nd2 (21...Ndf6 22.Rf3 Rf3 23.Nf3=) 22.Qd2 Re7 (22...Re6 23.Qd3=) 23.Rae1 (23.a5!?+=) 23...Nf6= 24.Re7 (24.Re5 Ne4 25.Qe3 g6=) 24...Qe7 25.Re1 (25.Rc1 Ne4 26.Qb2 Qd8=) 25...Ne4 26.Qe2 Qc7 27.Qd3 (27.Qe3 g6=) 27...b6 (27...Qf4 28.Rf1 Qg5 29.c6 bc6 30.Bc6-/+) 28.cb6 (28.Qe3 bc5 29.dc5 Qc5 (29...Nc5?? 30.Qe8 Re8 31.Re8) 30.Qc5 Nc5=) 28...Qb6=+ 29.Rc1 h6 (29...g6 30.Rc2=+) 30.Rc6 (30.g3 g6=) 30...Qa5=+ 31.h3 (31.Rc1!?=+) 31...Qe1-/+ 32.Qf1 Qe3 33.Kh2 Qd4 34.Qf3 (34.Qc1 Rf8-/+) 34...Rd8 (34...Nd2 35.Qd3 Qf4 36.Qg3 Qa4 37.Ba4 Nf1 38.Kg1 Ng3-+) 35.a5? (35.Qh5 Nf2 A) 36.Qf5? Qd1 37.Rc8 Qh1 38.Kg3 Ne4 39.Qe4 de4 (39...Rc8?! 40.Qd5 Qe1 41.Kf3-/+) 40.Rd8 Kh7-+; B) 36.Qh4-/+) 35...Qa1?? (better 35...Qb4 36.Ba6 Qa4-+) 36.a6= Rb8 (better 36...Qd4=) 37.Be2?? (better 37.Bd3=) 37...Rb1-+ 38.Rc8 (38.Bd1 Kh7 39.a7-+) 38...Kh7 39.g4 (39.g3 Rb2 40.Qg2 Qe1-+) 39...Rb2 40.gf5 (40.Qg2 Qa2 41.Bf3 Rg2 42.Bg2 fg4 43.hg4-+) 40…Qa2 (40...Qa2 41.Kg1 Re2-+; 40...Qe1 41.Rg8 Re2 42.Qe2 Qe2 43.Kh1 Ng3 44.Kg1 Qf1 45.Kh2 Qf2) 0–1. Bommini,Mounika Akshaya (2025) – Grigoryan,Meri (2040), Women's Speed Chess Q3, 2021.

5.d3 Nbd7 6.Nd2 Nb6 7.e3 Be6 8.Ngf3 g6 9.g3 Bg7 10.Bg2 Qd7 11.0-0 Bh3 12.c4 Bg2 13.Kg2 dc4 14.dc4 0-0 15.Qc2 c5 16.e4 Rfd8 17.Rad1 Qe6 18.Ng5 Qg4 19.f4 h6 20.h3 Qc8 21.Ngf3 Qc7 22.e5 Ne8 23.Ne4 Rd1 24.Rd1 Rd8 25.Rd8 Qd8 26.Kf2 Qc7 27.Qd3 f5 28.Nc3 Bh8 29.Nd5 Nd5 30.Qd5 Kf8 31.Nd2 Ng7 32.Ke3 e6 33.Qd6 Qd6 34.ed6 Ke8 35.Be5 Kd7 36.Nb1 g5 37.Nc3 b6 38.Na4 Kc8 39.Nb6 Kb7 40.Na4 Kc8 41.Nc5 Ne8 42.d7 Kd8 43.de8Q Ke8 44.Bh8 Ke7 45.Ne6 Kd6 46.fg5 Ke6 47.gh6 Kf7 48.Kf4 Kg8 49.Kf5 Kh7 50.Kg5 Kh8 51.c5 Kh7 52.Kh5 Kg8 53.Kg6 Kh8 54.c6 Kg8 55.c7 Kf8 56.c8Q Ke7 57.Qc6 Kf8 58.Qf6 Ke8 59.Kf5 Kd7 60.Qg7 Kc8 61.h7 1-0. FischerChess (2215) - john_boone (2265), Rated Bullet game, lichess.org.

5.e3 Bf5 (5...e6 6.Nf3=) 6.c4 (6.Nf3 e6=) 6...e6 7.cd5 Nd5 8.d3 Bg6 9.e4 Nb6 10.h4 (10.Nf3 f6=) 10...f6 (10...h5 11.Be2=) 11.h5 Bf7 12.d4 c5 (12...Be7 13.Nf3=) 13.bc6 Nc6 14.Nf3 h6 15.Nbd2 (15.Bb5 Bd6=) 15...Bd6 16.Bd3 0-0 17.Qe2 White intends e5 17...Bc7 18.Rc1 Ra5 19.g4 Qd7 20.e5 Nd5 (20...fe5 21.Qe4 Rd8 22.Qh7 Kf8 23.Qh8 Bg8 24.g5+/–) 21.ef6 (better is 21.Qe4!? f5 22.gf5 ef5 23.Qf5 Qf5 24.Bf5+/–) 21...gf6= 22.Ne4 Qe7 23.Bb1 (23.Nc5 Nf4 24.Qe4 Nd3 25.Qd3 Bf4=) 23...Nf4 24.Qc2 (24.Qd2 Rd5=) 24...Be8 (24...f5 25.gf5 ef5 26.Rg1 Kh7 27.d5 Bd5 28.Rg7 Qg7 29.Bg7-+) 25.Kf1 (25.Nc5 Bd6 26.Qe4 e5=) 25...Qg7 (25...Rf7 26.Rg1=) 26.Ba2 Kh8 (26...Qg4? 27.Rg1 Bh5 28.d5 (28.Rg4?! Bg4 29.Ng1 Rh5+-) 28...ed5 29.Nf6 (29.Rg4?! Bg4 30.Nd4 Be5 31.Nc6 bc6 32.Be5 fe5+/–) 29...Rf6 30.Bf6 (30.Rg4?! Bg4 31.Bf6 Bf3+/–) 30...Qg1 31.Ng1+-) 27.Rg1 Rb5 (27...Nh3 28.Rg2=) 28.Nc5 Nd8 29.Nh4 (29.Bc4 Nh3 30.Rg2 Rb6=) 29...Rg8 (29...Bd6 30.Bb1+=) 30.Ng6 Ng6 ½–½. Cirulis,Ilmars (1905) – Faust,Dieter (1830), FICGS, 2016.

5.e3 Nbd7 6.Be2 e5=+ 7.g4 (7.Nf3 Bd6=+) 7...Bg6 (7...Be4 8.Nf3 Ng4 9.Nc3-/+) 8.g5 Ng8 9.h4 Bd6 10.h5 Bf5 11.f4 ef4?? (better 11...f6 12.h6 gh6 (12...fg5?? 13.hg7 Qf6 14.gh8R Qh8 15.Bh5 Kd8 16.fg5+-; 12...ef4?? 13.hg7 Qe7 14.Bh5 Bg6 15.gh8Q+-) 13.Bh5 Ke7 14.gf6 Ngf6=+) 12.Bg7+/- Qg5 (12...Be4 13.Bf3 (worse 13.Bh8 Bh1 14.Nh3 fe3=+) 13...Be5 14.Be5 (14.Bh8?! Bh8 15.d4 Qg5=+) 14...Ne5 15.Be4 (15.ef4?! Nf3 16.Nf3 Qe7+=) 15...fe3 16.Bf3 Qg5 17.Qe2+/-) 13.Bh8+- Qg3 (13...fe3 14.Kf1 Ngf6 15.Nc3-/+) 14.Kf1 fe3 15.de3 Be4 (15...Ngf6 16.Nd2 Qe3 17.Bd3 Bd3 18.cd3 Qd3 19.Qe2 Qe2 20.Ne2+/-) 16.Nf3 Ne5 (16...Ngf6 17.Rg1 Qh3 18.Ke1+-) 17.Be5 Be5 18.Ra2 (better 18.Rg1!? Qh3 19.Ke1 Bg3 20.Kd2 Nf6+-) 18...Nf6 19.Qe1?? (better 19.Rg1 Qh3 20.Ke1 Bf3 21.Bf3 Qh4 22.Kd2+-) 19...Bf3+= 20.Qg3 Be2 (20...Bg3?? 21.Bf3 0-0-0 22.Nd2+-) 21.Ke2 Bg3 22.Nd2 Ke7 23.c4 Be5 24.Rc2 Rg8 25.Nf3 (25.cd5 Nd5 26.Nc4 Rg3+/-) 25...Bd6 (better 25...Rg2 26.Kd3 Rc2 27.Kc2 Bd6=) 26.Rg1 (better 26.c5 Bg3 27.Rd1+=) 26...Rg1=+ 27.Ng1 Ba3 28.cd5 Nd5 29.e4 Nf4 30.Kf3 Nh5 (better 30...Bd6!? 31.Ra2 Nh5 32.Ra5 Ng7=+) 31.Rc7+= Ke6 (better 31...Kf6!?+=) 32.Rb7 Nf6 (32...a4 33.Nh3 Bb2 34.Ng5 Kd6 35.Nf7 Kc5 36.Rc7 Kb6 37.Rc2+-) 33.Ne2 (33.Nh3 Ke5+-) 33...Bc5? (better 33...Ke5 34.Ng3 Bc5+-) 34.Nf4+- Ke5 35.Nd3 Kd4 36.Nc5 Kc5 37.Rf7 Ne8 38.e5 (38.Rh7?! Kb5 39.Re7 Nd6+-) 38...Kb5 39.Re7 (39.Rh7?! Kc6+-) 39...a4 40.Re8 a3 41.Ra8 a2 (41...Kc6+-) 42.e6 (42.e6 Kb6 43.e7 h6 44.e8Q a1Q 45.Qe6 Kb7 46.Qc8 Kb6 47.Rb8 Ka5 48.Qc5 Ka4 49.Qb4) 1-0. black_bishop_88 (2605) - Parsifal01 (2440), lichess.org, 2020. (=1.a3 Nf6 2.b4 d5 3.Bb2)

5.Nf3 Nbd7 6.Nh4 Be6 7.e3 g6 8.Nf3 Bg7 9.Be2 0-0 10.0-0 c6 11.h3 Qc7 12.a4 Rac8 13.Nd4 cb5 14.Bb5 Ne4 15.Na3 Qd8 16.Be2 Nb6 17.Ne6 fe6 18.Bg7 Kg7 19.Nb5 e5 20.d4 ed4 21.ed4 Rc6 22.Bd3 Rff6 23.Qc1 Qd7 24.c3 Nd6 25.Nd6 Qd6 26.Re1 Rc7 27.Ra2 e6 28.Qb2 Rf8 29.Ra3 Rff7 30.Rb3 Na4 The backward pawn on c3 becomes a target 31.Qa1 Nb6 32.Qa5 Nd7 33.Re2 Nb8 34.Qa1 Nc6 35.Qe1 Rce7 36.Bb5 Rf8 37.Re3 Rfe8 38.Bf1 Rf8 39.Rb5 Rff7 40.h4 Na7 41.Rb1 Nc6 42.g3 Rf6 43.Rb6 Qc7 44.Rb2 Qc8 45.Bh3 Nd8 46.f4 Qc7 47.h5 Qd7 (47...gh5!? 48.Qe2 Rh6+=) 48.Bg4+/– Re8 49.Rh2 Qc6 50.h6 Kg8 51.Ra2 Kf8 52.Kg2 Nf7 53.Rae2 Nd8 54.Qh1 Kg8 55.Qh4 Rff8 56.Qg5 b6 57.Bh3 Qd7 58.f5! ef5 59.Bf5! Qf7 (59...Qf5 60.Re5 Double attack (60.Re8 Deflection; 60.Re5 Decoy; 60.Re8 Overloading); 59...Rf5 60.Re8 Mate attack) 60.Re8 Re8 61.Re8 Qe8 62.Bg4 Nf7 63.Qd5 Kf8 64.Be6 Nh6 65.g4 Nf7 66.Bf7 Qf7 67.Qf7 Kf7 68.g5 Ke6 69.c4 Kf5 70.c5 bc5 (70...b5 71.Kf3 b4+-) 71.dc5 Ke6 72.Kf3 Kd5 73.Kf4 Kc5 74.Ke5 1–0. wilfried (2335) – the_great_omni (2265), gameknot.com, 2015.

5.Nf3 Nbd7 6.Nh4 Bg6 7.Ng6 hg6 8.e3 Nb6 (8...e6 9.h3=) 9.Be2 (9.Bd4 e6=) 9...e6 10.Bd4 (10.0-0 Bd6 11.h3 e5=) 10...Bd6 11.h3 (11.Bb6 cb6 12.h3 Rc8=) 11...c5 12.bc6 bc6 13.Bc3 (13.f4 Rb8=) 13...Na4 (13...e5 14.Ra2=+) 14.Bf6= Qf6 15.d4 Qg5 (15...Rb8 16.c4 Nb2 17.Qc2=) 16.g3 0-0 (16...Rb8 17.Qd2 Qd8 18.c4 dc4 19.Qc2=) 17.c4 (17.h4 Qf6=) 17...Nb2 18.Qc1 Nc4 19.Bc4 dc4 20.Nd2 c5 21.Qc4 Bg3 (21...Rfc8 22.Ne4 Qe7 23.d5 ed5 24.Qd5=) 22.fg3 Qg3 (22...Qe3 23.Kd1 cd4 24.Rf1=) 23.Kd1 cd4 (better 23...Qe3 24.Qc5 Rfd8=) 24.Qd4 (better 24.ed4 Rfd8 25.Qb3=) 24...Rfd8-/+ 25.Qe4 Qf2 26.Ra2 Rab8 27.Kc1 Rbc8 28.Kd1 e5 29.Rb2 f5 30.Qb7 Rc3 (30...Qe3?! 31.Qb3 Qb3 32.Rb3=+) 31.Rc2 (31.Re1 Ra3 32.Ra2 Rd2 33.Rd2 Ra1 34.Kc2 Ra2 35.Kb1 Rd2 36.Qb3 Kh7 37.Rc1-+) 31...a4 (31...Qe3?! 32.Re1 Qf4 33.Qb2 Rh3 34.Qe5 Qe5 35.Re5 Ra3 36.Ke2-/+) 32.Qb5 Qf3 33.Kc1 Qh1 34.Kb2 Rc2 (34...Rc2 35.Kc2 Rc8 36.Nc4 Qe4 37.Kc3 Qe3 38.Kc2 Qd4 39.Qa4 Rc4 40.Qc4 Qc4 41.Kd2 f4 42.Kd1 f3 43.Kd2 f2 44.h4 f1Q 45.a4 Qfe2) 0–1. kamret (2210) – zinga (2385), GameColony.com, 2003.

5.Nf3 e6 6.Nh4 (6.e3 Bd6=) 6...Bg6 (6...Bg4 7.h3 Bh5 8.g4=) 7.e3 (7.Ng6 hg6 8.e3 Bd6=) 7...Nbd7 (7...Bh5 8.Be2 Be2 9.Qe2=) 8.Be2 Bd6 9.h3 (9.f4 Ne4 10.g3 Ndf6=) 9...Nc5 (9...Nb6 10.0-0=) 10.a4 (10.Ng6 hg6 11.c4 a4=) 10...Nh5 11.Nf3 0-0 12.0-0 Nf6 13.Nh4 e5 (13...Be4 14.f3 Ne8 15.d4 Bc2 16.Qc2=) 14.Ng6 hg6 (14...fg6 15.d4 ed4 16.Bd4=) 15.d3 (15.d4 ed4 16.Bd4 Qe7+=) 15...Qd7 16.Nd2 Qf5 17.Qb1 (17.d4 ed4 18.Bd4 Ne6+=) 17...Ne6 (17...Rfe8 18.c4+=) 18.Qa2 (18.c4 c6+=) 18...Rad8 19.Rad1 (19.c4 d4 20.e4 Qg5+=) 19...Ng5 20.Rfe1 Rfe8 21.Ba3 (21.c4 d4=) 21...Ne6 (21...Ba3 22.Qa3 b6 23.c4+=) 22.c3 Ba3 23.Qa3 d4 (23...g5 24.d4+=) 24.e4 (24.cd4 ed4 25.Nb3 de3 26.fe3 Ng5=) 24...Qf4 25.cd4 (25.Nf3 Nd7=) 25...Nd4= 26.Qc3 Qh6 (26...Rd7 27.Qa5 Nc2 28.Rf1=) 27.Bf1 (27.Qc7!? Ne2 28.Re2 Rd3 29.Qb6=) 27...Re7= 28.Qa5 Nc2 29.Qc3 (29.Re2 Rd3 30.f4 b6 (30...Qf4? 31.Rf2 Qe3 32.Bd3 Qd3 33.Qa8 Kh7 34.Qb7+-) 31.Qa8 Re8=+) 29...Ne1=+ 30.Re1 Nh5 (30...Ne8 31.a5=+) 31.Nf3 Qf4 32.a5 (32.Qc5 Rde8=) 32...Qf6=+ 33.Qa3 White prepares the advance a6 33...Qd6 (33...Ree8 34.Qc5=) 34.Qd6 cd6 35.d4 (35.a6 Nf6=) 35...Nf6 (35...ed4 36.Nd4 Nf6 37.a6=) 36.a6 (36.de5 de5 37.a6 Kf8+=) 36...ed4= 37.Nd4 (37.ab7 Rde8 (37...Ne4? 38.Nd4 Rb7 39.Re4+-) 38.Nd4 Rb7= (38...Re4?? 39.Re4 Ne4 40.Nc6+-; 38...Ne4? 39.b8Q Rb8 40.Nc6+-)) 37...Re4 (37...Ne4? 38.ab7 Rb7 39.Re4+-) 38.Re4 Ne4 39.b6 (worse 39.ab7 Rb8=+) 39…Nc5 ½–½. Degterev,Pavel (2195) – Zeram,Alexis, IECG, 2008.

5.Nf3 h6 6.e3 (6.Bf6 gf6 7.e3 Rg8=) 6...e6 7.Be2 Be7 (7...Bd6 8.Nd4=) 8.0-0 0-0 9.c4 (9.d3 c6=) 9...c5 (9...dc4 10.Bc4 Bd3 11.Bd3 Qd3 12.Nc3=) 10.d3 (10.d4 dc4 11.dc5 Bc5=) 10...Nbd7 (10...dc4 11.dc4 Nbd7 12.Bd3=) 11.Nbd2 Qc7 (11...Qb6 12.d4=) 12.a4 (12.Qc2 Bd6=) 12...b6 (12...Bd6 13.Rc1=) 13.h3 (13.Rc1 Bd6=) 13...Bg6 (13...Rad8 14.cd5 ed5 15.Rc1=) 14.Qb3 (14.cd5 ed5 15.Qc2 Rae8=) 14...Rac8 15.Rac1 Rfd8 ½–½. Woelfelschneider,Peter (2220) – Van Seben,Edgar (2380), WC–2013–S–00007, 2010.

5.f3 Bf5 6.e3 e6 7.Ne2 Bd6 8.Nd4 Bg6 9.Bd3 Nfd7 10.0-0 Nc5 11.Bg6 hg6 12.f4 Na4 13.Bc3 Qe7 14.Qc1 g5 15.f5? (better is 15.Ne2 gf4 16.ef4 Nc3 17.Nbc3-/+) 15...Bh2-+ 16.Kf2 e5 17.Ne2 Qd7 18.Ke1 Qb5 19.d3 Nc6 20.d4 ed4 21.Bd4 Nd4 22.ed4 0-0-0 23.Qg5 (23.Kf2-+) 23...Rde8 24.Rf2 Qb2 25.f6 Qd4 26.fg7 (26.Rf3 Bd6 27.Rh3-+) 26...Re2! (26...Qa1 27.Qg4 Kb8 28.gh8Q Qh8 29.Qa4-+) 27.Re2 Bg3!! 28.Qg3 Rh1 0–1. Tiedemann,Joern (1810) – Hoch,Hubertus (2165), RSX9E – A00 – Sokolsky–2, 2004.

5.h3 Bh5 6.d3 e6=+ 7.g4 Bg6 8.Nf3 a4 9.g5 Nfd7 (9...Nh5 10.Nc3=+) 10.c4 (10.Nbd2 c6 11.c4 dc4 12.bc6 Nc6 13.Nc4 Nc5=) 10...Nc5= 11.Nbd2 (11.cd5 ed5 12.h4 h6=) 11...Nbd7 12.Qc2 h6 13.Rg1 Qe7 14.Nh4 (14.Rc1 0-0-0=) 14...Bh5 (worse 14...hg5 15.Ng6 fg6 16.d4+=) 15.cd5 hg5 16.de6 Qe6 17.Nhf3 (worse 17.Rg5 Be2 18.Be2 Rh4=+) 17...Nb3 18.Rd1 (worse 18.Qc7 Na1 19.Ba1 Nc5-+) 18...f6 19.Qc7 Bf3 20.Nf3 Nbc5 21.Qg3 Qa2 22.Bc1 0-0-0 (22...Nb3 23.Qc7 Ba3 24.Bd2 Nd2 25.Nd2=+) 23.h4 (23.Qg4 Re8+=) 23...gh4+= 24.Nh4 (24.Qg6 Bd6 25.Bh3 Kb8=) 24...Nb3= 25.d4 (25.Qf4 g5 26.Qc4 Kb8-/+) 25...Qc2 26.Ng6 Rh5 (26...Nc1 27.Rd2 Qb1 28.Rd1-/+ (28.Nh8?? Nd3)) 27.Qd3 (27.Nf8 Nf8 28.Bd2 Ne6 29.Qc3 Qc3 30.Bc3 Nbd4 (worse 30...Rb5 31.e3 Rb6 32.Bh3+-) 31.Bd4 Rd4=) 27...Qc7 28.Nf8 (28.Bb2 Ba3 29.Bc3=+ (29.Ba3 Qa5 30.Rd2 Ndc5 31.Bc5 Rc5 32.Bh3 Kb8-+)) 28...Nc1=+ 29.Qd2 Nb3 30.Ne6 Qc4 (worse 30...Nd2 31.Nc7 Nf1 32.Ne6+-) 31.Qe3 Re8 32.Bh3 Rh3 33.Qh3 Re6 34.Qd3 Qd5 35.f3 f5 (35...g5!?-/+) 36.Rg7= Kb8 37.Rg5 Rh6 38.Kf2 Qd6 (38...Qe6 39.e3= (39.Qf5 Rh2 40.Kg3 Qe2 41.Qd7 Rg2 42.Kf4 Rg5 43.Kg5 Qd1=)) 39.Qf5 Ka7 (39...Nd4?? 40.Qe4 Qh2 41.Rg2 Qh4 42.Qh4 Rh4 43.e4 Nb5 44.Rd7 Na3 45.Rgg7+-) 40.Rg2 White prepares d5 40...Nf8 (40...Nd4? 41.Qe4 Qa3 42.Rd4+-) 41.Qe4 Ne6 d4 draws heavy fire 42.d5 Nec5 (42...Nbc5 43.Qb4 Kb6 44.e3= (44.de6? Qd1 45.e7 Re6-+)) 43.Qe3 (43.Qc4 Rf6+=) 43...Rh5 (43...Kb6 44.Qe8=) 44.Rg4+= Qb6 (44...Rh2 45.Kg1 Kb6 46.f4+=) 45.Kg3 Rh7 (45...Qd6 46.Qf4 Qd7 47.d6+-) 46.Kg2 Qb5 (46...Rd7 47.Qf2+-) 47.Rh1 Rh1 48.Kh1 Qd7 49.Qe5 Qb5 (49...Qh7 50.Kg2 Qc2 51.d6+-) 50.Rb4 Qd7 (50...Qa6 51.Qe3+-) 51.Kg2+- Na6 52.Rc4 Nbc5 53.d6 Kb6 54.Qd5 Qh7 55.Rd4 Qd7 56.Kf2 Nb3 57.Rc4 Nac5 58.Rf4 (58.Rb4 Ka6+-) 58...Ka7 (58...Qh3 59.Rb4 Ka7 60.Qe5+-) 59.Rf7 (59.Kg3 Qg7 60.Rg4 Qd7+-) 59...Qh3+- 60.Qe5 Ka6 61.Rg7 b6 62.Rg4 (62.Rg8 Na5 63.Rg4 Qh1+-) 62...Na5+- 63.d7 Nd7 64.Qd6 Qh7 65.Ra4 (65.Qc7 b5+-) 65...Nc5 66.Rb4 Qb7 67.Kg3 Ka7 68.Kg2 Qg7 69.Kf2 Qb7 70.Kg3 Qg7 71.Kh2 Qb7 72.e3 Na6 73.Re4 Qh7 74.Kg3 Qh1 75.Re6 Qb1 76.Rh6 (76.Re7 Nb7+-) 76...Nc5+= 77.Kg4 Nab7 78.Qc6 Qb3 (78...Qg1 79.Kf5 Qb1 80.e4+=) 79.e4+- Nd3 80.Re6 Ndc5 81.Rf6 Nd3 82.Qc7 Qb2 83.Kf5 Ndc5 84.Rh6 Na6 85.Qc6 Qb3 86.Kg4 Nac5 87.f4 Nd3 (87...Na5 88.Qc7 Nab7 89.Kf5+-) 88.Qe6+- Qb1 89.Kf5 White intends e5 89...Qb5 90.Qd5 Ndc5 91.e5 Qe2 92.Rh8 Qe3 93.e6 (93.Rh7 Qe2 94.Rh6 Qc2 95.Kg4 Ne4+-) 93...Nd3+= 94.Rh4 b5 95.Rg4 Ndc5? (better 95...Qe2!?+=) 96.Qe5+- Qd3 97.Kf6 Ne4 98.Kg7 Ned6 99.Rg5 (99.e7 Ne8 100.Kf8 Nbd6+-) 99...Nc4 100.Qb5 Qd4 101.Kg6 (101.Kh7 Qf4 102.e7 Qe4 103.Kh8 Ncd6+-) 101...Qf4 102.Qd5 Ncd6 103.e7 Qa4 104.Kg7 Ne8 (104...Qa3 105.Qe5+-) 105.Kf8+- Ned6 106.Qe5 Qe8 107.Kg7 Nc8 108.Qe3 Kb8 109.Re5 Ncd6 110.Qb3 Qc6 111.Qd5 Qa4 (111...Qc3 112.Kf8 Qa3 113.Re6+-) 112.Qe4! Qd7 (112...Qe4 113.Re4 Combination; 112...Ne4 113.e8Q Double attack) 113.Qb4 (113.Qf3 Qa4+-) 113...Qc6 (113...Ne8 114.Kf8 Qc6 115.Rb5+-) 114.Qf4 Ne8 115.Kf8 Nbd6 116.Qb4 Nb7 117.Qd4 (117.Rb5 Nc7 118.Rb6 Qf3 119.Kg7 Kc8+-) 117...Kc7+- 118.Qf4 (118.Rd5 Ned6 119.Kg7 Ne8 120.Kh7 Qc2 121.Kh6 Kc6+=) 118...Nbd6 119.Re1 (119.Qe3!? Kd7 120.Qb3+-) 119...Qd5+= 120.Rc1 Kb8 121.Qf2 (121.Qb4 Ka8 122.Qa4 Kb8 123.Rb1 Kc8 124.Qf4+=) 121...Kb7+= 122.Rc5 (122.Rb1 Kc8+=) 122...Qe4+- 123.Qg3 (123.a4 Nc7 124.Qb2 Ka6 125.Rc7 Qf3 126.Kg8 Qd5 127.Kh8 Qh5 128.Kg7 Qg4 129.Kh7 Qh5 130.Kg7 Qg4 131.Kh6 Nf5 132.Kh7 Qh5 133.Kg8 Qe8 134.Kh7 Qh5 135.Kg8 Qe8 136.Kh7 Qh5=) 123...Ka6 (better 123...Qe6!? 124.Qf3 Kb8=) 124.Rh5+- Qe2 (124...Qd4!? 125.Re5 Nc7+-) 125.Rh3+- Qa2? (better 125...Qf1 126.Qf3 Qa1 127.Qc6 Ka7+-) 126.Qd3 Ka7 (126...Kb7 127.Qb3 Qb3 128.Rb3 Kc8+-) 127.Qd4 Kb7 128.Qb4 Ka8 129.Qa4 Kb8 130.Rb3 Kc8 131.Qa6 Kd7 132.Qa7 Ke6 (132...Nc7 133.Qa4 Ke6 134.Qg4 Kd5 135.Rd3 Kc6 136.Rc3 Kb7 137.Qf3 Kb8 138.Rb3 Ka7 139.Qe3 Ka8 140.e8R Nce8+-) 133.Re3 Kd5 134.Rd3 Ke6 (134...Ke5 135.Qe3 Kf5 136.Qf3 Ke5 137.Qg3 Ke4 138.Rd6 Nd6 139.Qd6 Qf2 140.Kg8 Qg2 141.Kh7 Qh3 142.Kg7 Qc3 143.Kf7 Qf3 144.Qf6 Qh5 145.Qg6 Qg6 146.Kg6+-) 135.Rd6! Kd6 (135...Kd6 136.Qb6 Double attack (136.Ke8 Remove defender); 135...Nd6 136.Qe3 Decoy (136.e8Q Remove defender)) 136.Qb8 Ke6 137.Qc8 (137.Qe8?! Qf2 138.Kg8 Qg3 139.Kh7 Qh4 140.Kg6 Qg4 141.Kh6 Qh4 142.Qh5 Qh5 143.Kh5 Ke7=; 137.Ke8 Qa3 138.Qb6 Kf5+-) 137...Kd6 (137...Kf6 138.Qe8 Qa3 139.Qf7 Kg5+-) 138.Qe8 Qa3 139.Qh5 Kc6 140.Qf5 Kb7 141.Qd5 Kc7 142.Kf7 Qb4 (142...Qh3 143.e8Q Qh7 144.Kf6 Qh6 145.Qg6 Qg6 146.Kg6 Kb8 147.Kf6 Ka7 148.Qc6 Kb8 149.Ke5 Ka7 150.Kd6 Kb8 151.Qb5 Ka7 152.Kc6 Ka8 153.Qb7) 143.Qe5 (143.Qe5 Kb6 144.e8Q Qc4 145.Q8e6 Qe6 146.Ke6 Kb7 147.Qb5 Kc7 148.Ke7 Kc8 149.Kd6 Kd8 150.Qd7) 1–0. condoru (2060) – gluv51 (2045), gameknot.com, 2015.

5.h3 Bh5 6.g4 Bg6 7.Bg2 c6 (7...e6 8.c4=+) 8.bc6 (8.Nf3!?=) 8...Nc6=+ 9.Nf3 e6 (9...h5 10.g5 Ne4 11.Qc1=+) 10.0-0 (10.Nc3 h5 11.gh5 Rh5-/+) 10...Bc5 (10...h5!? 11.g5 Ne4-/+) 11.Nc3=+ 0-0 12.d3 a4 13.Nb5 Nd7 (13...Qb6 14.Bf6 Qb5 15.Bc3=+) 14.Rb1 Rc8 15.e3 Re8 16.d4 (16.Nfd4 h6=) 16...Bf8 (16...Be7 17.Qe2-/+) 17.Nc3 (17.Qe2!?=+) 17...Na5-/+ 18.Nd2 (18.Re1 Rc6-/+) 18...Nb6 (18...Ba3 19.Ba3 Rc3 20.Bb4 Bc2 21.Qf3 Bb1 22.Bc3-+) 19.e4 Nac4 20.Nc4 Nc4 (20...Rc4?! 21.Re1=+) 21.Na4 Be4 22.Be4 de4 23.c3? (23.Bc3 b5 24.Nc5-+ (24.Rb5?? Qd7 25.Rb3 Qa4-+)) 23...b5 24.Nc5 Bc5 25.dc5 Nd2 0–1. rona81 (1940) – gluv51 (2025), gameknot.com, 2015.

5.ab4 Ra1 6.Ba1 e5 7.b5 (7.Be5 Bb4 8.Nf3 0-0=+). kostovist – Fabbri (1715), internet, 2006.

5.ab4 Ra1 6.Ba1 Bf5 7.c4 e6 8.c5 b6 9.cb6 cb6 (9...c6 10.Bd4=) 10.Bc3 (10.Nf3 Nbd7=+) 10...Bd6 11.Bb5 Nbd7 12.Bf6 (12.Nf3 0-0=+) 12...Qf6 (12...gf6!? 13.g4 Bg6=+) 13.Bd7= Kd7 14.Qa4 Kc8 (14...Ke7 15.Qa7 Ke8 16.Qb6=) 15.Qa8 (15.Nc3 Kb8=) 15...Bb8= 16.Qc6 Bc7 (16...Kd8 17.Nc3=) 17.Nc3+= Bd3 18.Nf3 Rd8 19.Nd4 Rd6 (19...e5 20.Qa8 Kd7 21.Qa4 (< 21.Qd5 Ke8 22.Qc6 Qc6 23.Nc6 Ra8-/+) 21...b5 22.Ndb5=) 20.Qa8 (20.Qa4 e5 21.Ndb5 Bb5 22.Nb5 Rd7 23.Qa8 Bb8+/–) 20...Kd7= 21.Qa4 Ke7 22.Ncb5 Rd7 23.Nc7?? Rc7-/+ 24.Qa3 Qg6 25.g3 h5 26.b5=+ Kf6 27.Nc6 h4?? 28.Qb2+- Kg5 29.f4 Kh6=+ 30.Rg1?? h3 31.g4= Qe4 32.Ne5 f6 33.g5= Kh5 34.gf6 gf6 35.Nd3 Qd3 36.Qa1 Rc2 37.Qd1 Kh6 38.Rg3 d4 39.Rh3+/– (39...Kg7 40.Rg3 Kh6 41.ed4 Qe4 42.Re3 Qh1 43.Ke2 Qg2 44.Kd3 Qg6 45.Re4+=) 1–0. revbodio (1935) – mattv6 (1875), Caissa's Web, 2006.

4.a4 a5 (4...e5 5.Be5 Nc6 6.Bb2 Nb4 7.Nf3=+) 5.b5= e6 ½–½. Di Benedetto,Desiree (2305) – Di Benedetto,Edoardo (2290), 78th ch–ITA Semi–Final, 2018. (=1.a3 a6 2.b4 d5 3.Bb2 Nf6)

4.c4 dc4=+ 5.e3 b5 6.Qf3 (6.d3 cd3 7.Bd3 e6=+) 6...Ra7 7.Nc3 Bb7 8.Qg3 g6 (8...c5 9.Rd1-/+) 9.Nf3 Bg7 10.Be2 (10.Rd1 Nh5 11.Qg5 Bf3 12.gf3 c6-/+) 10...Nbd7 11.0-0 c5 12.d3 (12.Rfc1 0-0-/+) 12...cd3 13.Bd3 0-0 (13...Bf3 14.gf3 Nh5 15.Qg2-/+) 14.Rfd1 Qc8 Black intends c4 15.Rac1 Bf3 16.Qf3 Ne5 Black prepares the advance c4 17.Qe2 c4 18.Bb1 Qb8 19.Nd5 (19.f4 Nc6=+) 19...Nd5-/+ 20.Rd5 Ng4! 21.g3 (21.Qg4 Bb2 Discovered attack (21...Bb2 Deflection)) 21...Bb2 22.Qb2 Nf6 23.Rc5 (23.Rd2 Rd8-/+) 23...Rd7-+ 24.a4 Rfd8 25.ab5 ab5 26.Qe2 Rd2 27.Qf3 Kg7 28.h3? (28.e4 e5-+) 28...h5 (better 28...Nd7!? 29.Rg5 h6 30.Rc5-+) 29.Kg2 (29.Be4!? Rb2 30.Rb1-+) 29...Rb2-+ 30.Rg5 (30.Be4 Ne4 31.Qe4 Rdd2-+) 30...Rdd2 31.Rf1 Qd6 (better 31...c3 32.Be4 Rb4-+ (32...Ne4?! 33.Qe4 Qd6 34.Rc5-+)) 32.g4?? (better 32.Rb5 c3 33.e4-+) 32...hg4-+ (32...Rb4?! 33.gh5 Rd5 34.Rd5 Qd5 35.hg6 fg6 36.Rg1-+) 33.hg4 c3 (worse 33...Rb4 34.Qf5-+; worse 33...Qb4 34.Bg6 fg6 35.Qf5-+) 34.Bg6 (34.Rb5 Ng4! 35.Qg4 Qc6 36.Be4 Qb5 37.Qf4-+) 34...fg6 35.Qf5 Qd5 36.Qd5 (36.Kh3 Qf5 37.gf5 c2 38.Rg6 Kf7-+) 36...Nd5 37.Kg3 (37.Rc1 c2 38.Kf3 Rd1 39.Rd5 Rc1 40.Rb5 Rf1-+) 37...c2 38.f4 (38.Rc1-+) 38...Ne3 39.f5 Nf1 40.Kh4 (40.Kf4 Rb4 41.Ke5 Ng3 42.Rg6 Kf7 43.Rg7 Kg7 44.f6 ef6 45.Ke6 Re4) 0-1. black_bishop_88 (2575) - Cheapie (2630), lichess.org, 2020. (=1.a3 a6 2.b4 d5 3.Bb2 Nf6)

4.e3 Bf5 5.Nf3 h6 6.Be2 e6 7.0-0 Bd6 8.d3 Nbd7 9.c4 dc4 10.dc4 c5?? (better 10...b6+=) 11.Qd6+- Ne4 12.Qd1 0-0 13.Nc3 Ng5 (13...Ndf6 14.Ne4 Ne4 15.Qb3+-) 14.Ng5 Qg5 (14...hg5 15.e4 Bg6+-) 15.Qd7 Bh3 (15...Rab8 16.e4 Bg4 17.Bg4 Qg4 18.bc5+-) 16.Qb7 1–0. Pierre – GuestHuete, internet, 2020.

4.Nf3 c6 5.e3 e5 (5...Nbd7!?=) 6.Ne5 Bd6 7.Nf3 Be6 8.d3 (8.Be2 0-0+/–) 8...Qc7 (8...a5 9.ba5 Ra5 10.e4 de4 11.de4 Ne4 12.Bg7+=) 9.Nbd2 Nbd7 10.h3 (10.c4 b6+/–) 10...b5 11.Be2 Ke7 (11...a5!?+=) 12.0-0 Rag8 (12...a5 13.ba5 Rhb8 14.Nb3+/–) 13.e4 de4 14.Ne4 Ne4 15.de4 f6 16.e5 (16.Nd4!?+-) 16...Be5 17.Ne5 Ne5 18.Be5 Qe5 19.Bf3 (19.Re1!? Rd8 20.Bd3+/–) 19...Rd8+= 20.Qc1 Kf7 21.Re1 Qf5?? (better is 21...Qc3+=) 22.Bg4+- (22.Bc6?! Rd6 23.Be4 Qh5+/–) 22...Qd5 (22...Qg5 23.f4 (23.Re6?! Qc1 24.Rc1 h5+-) 23...Qg6 24.Be6 Kf8 25.Qe3+-) 23.Be6 (23.Re6?! h5 24.c4 bc4+/–) 23...Qe6 24.Re6 Ke6 25.Qe3 Kf7 26.Qa7 Kg6 27.Qa6 Rhe8 28.Qc6 Re2 29.Qb5 Rdd2 30.Rf1 Rc2 31.a4 Re5 32.Qb6 Rg5 33.a5 Rc3 34.f3 1–0. Fournier,Frederic (1775) – racosa, Active, 2007.

4.Nf3 Nc6 5.e3 b5 6.Be2 Bb7 (6...Qd6 7.a4 ba4 8.b5 ab5 9.Bb5=) 7.0-0 Qd6 8.d3 e5 9.c4 dc4 (9...Qe6 10.cb5 ab5 11.Nc3+/–) 10.dc4 bc4 11.Nbd2 e4 12.Ng5 (better is 12.Nd4+=) 12...g6? (better is 12...h6 13.Nh3 Rd8 14.Nc4 Qd1 15.Rfd1 Be7+=) 13.Nde4 (< 13.Nge4 Ne4 14.Ne4 Qd1 15.Rfd1 Be7 16.Bh8 Nb4 17.ab4 Be4+-; < 13.Bc4 Nd8 14.Nge4 Ne4 15.Ne4 Be4 16.Bh8 c5+-) 13...Ne4 14.Ne4 (14.Bh8?! Qd1 15.Rad1 Ng5 16.Bc4 Bd6=) 14...Qd1 15.Rfd1 (< 15.Rad1 Be7 16.Bh8 Nb4 17.ab4 Be4+-) 15...Nb4 (15...Be7 16.Bh8 Nb4 17.Nf6 Bf6 18.Bf6 Nd5+-) 16.Nf6 Ke7 17.Rd7 Ke6 18.Bg4 1–0. Creatchy – patman007, ChessWorld.net, 2005.

4.Nf3 Nbd7 5.d4 (5.e3 e6=) 5...e6 (5...Nb6 6.e3=+) 6.e3 Bd6 7.c4 dc4 (7...a5 8.c5 Be7 9.Bd3+=) 8.Bc4 Nb6 (8...0-0 9.Bd3=) 9.Bd3 Bd7 10.e4 Ba4 11.Bc2 (11.Qd2 Nh5=) 11...Bc2= 12.Qc2 Bf4 (12...Nfd7 13.0-0=) 13.a4 (13.0-0 0-0+=) 13...0-0 (13...Qe7 14.Bc3=) 14.0-0 Bh6 (14...a5 15.b5=) 15.a5+= Nbd7 (15...Nc8 16.Nc3+=) 16.Rd1 Qe7 17.Nc3 White intends d5 17...Nh5 (17...Rfc8 18.Ba3+=) 18.d5 (18.b5 ab5 19.d5 b4=) 18...e5 (18...Nf4 19.Rab1+=) 19.Na4+- Ndf6 (19...Rfc8 20.Nc5 Nhf6 21.Nh4+- (21.Nb7?! Qb4 22.Rab1 Qb7 23.Ne5 c5=)) 20.g3 (20.Nc5 Rfe8+-) 20...Rac8 (20...Qb4!? 21.Be5 Rfc8 22.Bc7 Qe4 23.Qe4 Ne4+-) 21.Ne5 g6 (21...Qb4 22.Bd4 Qd6 23.Nc5+-) 22.Nc5 Rb8 23.b5 ab5 24.a6 ba6 (24...Bg7+-) 25.Nc6 (25.Ra6?! Qe8+-; 25.Na6?! Rb7+-) 25...Qc5 (25...Qe8 26.Nb8 Qb8+-) 26.Qc5 Ne4 (26...Rbe8 27.Ne7 Re7 28.Qe7 Re8 29.Qc7 Ne4+-) 27.Ne7 1–0. pcmvr – mpopp, net–chess.com, 2017.

4.Nf3 Bf5 5.e3 h6 6.c4 e6 (6...Nc6 7.cd5 Nd5 8.Nc3=) 7.d4 (7.Nd4 Bg6 8.Nc3 Bd6=) 7...c6 (7...Nc6 8.c5=) 8.c5 Bg4 (8...a5 9.Nc3=) 9.Be2 Ne4 10.Nbd2 Nd2 11.Qd2 f5 (11...Bf5 12.Ne5+=) 12.a4 (12.Ne5 Be2 13.Qe2 h5+-) 12...Be7 13.a5 (13.0-0!?+-) 13...Nd7+= 14.h3 Bf3 15.Bf3 0-0 16.g3 (16.Bd1 Nf6=) 16...Nf6 17.0-0-0 (17.0-0 Ne4 18.Qc2 Qc7=) 17...Rb8 18.Qe2 Ne4 19.Bg2 Bg5 20.Kb1 Kh7 (20...Qe8 21.h4 Bd8 22.h5=) 21.h4 Be7 22.Rh3 g6 (22...Qe8 23.h5=) 23.f3 Nf6 24.Rf1 h5 25.Rhh1 Kg7 26.f4 (26.Bc3 Qc7=) 26...Ne4 (better 26...Kh7!?=) 27.Be4+= de4 28.Qc4 (better 28.d5!? Bf6 29.d6+-) 28...Qd5 29.Rc1 Rfd8 30.Ka2 Kf7 31.Kb3 Rg8 32.Bc3 Bf6 33.Bb2 Rgd8 34.Bc3 Qc4 (34...Qd7 35.Qe2=+) 35.Kc4= Rd5 36.Rhd1 Rbd8 37.Rd2 (37.Rg1 Re8=) 37...R5d7 (37...e5 38.fe5 Be5 39.Rg1=+ (39.de5?? Rd2 40.e6 Ke6 41.Bd2 Rd2-+)) 38.Rcd1 Rd5 39.Kb3 R5d7 40.Kc4 Rd5 41.Kb3 R8d7 42.Kc4 Rd8 43.Kb3 R5d7 44.Kc4 ½–½. Bendega (1880) – xdsuncity (1860), lichess.org, 2020.

4.h4 Nc6 5.e3 e5 6.Nf3 Bd6 7.d4 e4 8.Ne5 Qe7 (8...Bd7!?=+) 9.Nc6= bc6 10.Be2 h5 (10...0-0 11.c4 dc4 12.Nd2=) 11.Nd2 (11.c4 dc4 12.Nd2 a5 13.ba5 Bg4+=) 11...Rh6 (11...Ng4 12.c4 Qf6 13.Bg4 Bg4 14.Qa4=) 12.Nb3 (better 12.c4!? Qd7 13.Qa4+=) 12...Rg6 13.g3 Bg4 (13...Ng4 14.Rg1=+) 14.Na5 (14.Rb1 Be2 15.Qe2 Ng4=+) 14...Qd7 (better 14...Bb4!? 15.ab4 Qb4 16.Qd2 Qb2=+) 15.c4= Be2 16.Qe2 Ng4 17.0-0-0 Rf6 18.Rdf1 Rf3 19.Nb3 Kf8 (better 19...Qf5!? 20.c5 Be7-+) 20.Nd2=+ Rf5 21.f4 (21.c5 Be7=+) 21...ef3 (21...a5!? 22.ba5 Ra5-/+) 22.Rf3=+ Re8 23.Rhf1 Rf3 24.Rf3 f5 (better 24...Kg8!?=+) 25.Qd3 g6 26.e4 (26.c5 Nh2 27.cd6 Nf3 28.Nf3 cd6=) 26...de4= 27.Ne4 Kg8 28.Ng5 Qe7 (28...Be7 29.Nh3=) 29.Kb1 (29.c5 Qe1 30.Kc2 Qe2 31.Qe2 Re2 32.Kb3 Bf8+=) 29...Qe2 (29...Nh2 30.c5 Nf3 31.Qf3+=) 30.Qb3 White intends b5 (30.c5!? Qd3 31.Rd3+=) 30...Re3=+ 31.Re3 Qe3 32.Qe3 (better 32.Bc3!? Qg1 33.Ka2 Qg2 34.Bb2 Bg3 35.Nf3=) 32...Ne3-/+ 33.a4 (33.Bc1 Nc4 34.Kc2 Bg3-+) 33...Nc4-+ 34.b5?? (better 34.Bc1-+) 34...cb5 35.ab5 ab5 36.d5 (36.Nf3 Bg3 37.Bc1 Kf7-+) 36...Nb2 (better 36...Bg3 37.Nf3 Ne3-+) 37.Ne6 (37.Kb2 Bg3 38.Nf3 Kf8-+) 37...Bg3 (better 37...Nd1 38.Kc2 Ne3 39.Kd3 Nd5 40.Nd4-+) 38.Kb2 Bh4 39.Kb3 (39.Kc2 Bg3 40.Kd3 h4-+) 39...Bg3 (39...Be7!? 40.Nf4 Kf7 41.Nd3-+) 40.Nf4 (40.Kb4-+) 40…Bf4 0-1. black_bishop_88 (2550) - JoaBN (2665), lichess.org, 2020. (=1.a3 a6 2.b4 Nf6 3.Bb2 d5)

5.Nd2 A) 5...Qd6 6.Ngf3 (6.c4 g6 7.Ngf3 Bh6 8.g3 Be6 9.Bg2) 6...g6 7.c4 Bh6 8.g3 0-0 9.Bg2; B) 5...Bf5 B1) 6.Nb3 e6 (6...e5 7.Nf3 Bd6 8.Nc5 Bc5 9.bc5; 6...Qd6 7.Nf3 g6 8.h3 h5 9.Nbd4) 7.Nf3 Bd6 8.Nbd4 Nd4 9.Nd4; B2) 6.Ngf3 e6 7.c4 Bd6 8.g3 0-0 9.Bg2; C) 5...g6 C1) 6.g3 Bg4 (6...Qd6 7.Ngf3 Bd7 8.Nb3 b6 9.c4; 6...Bg7 7.Bg2 Qd6 8.Ngf3 0-0 9.0-0) 7.Ngf3 Bg7 8.Bg2 0-0 9.0-0; C2) 6.Ngf3 Bh6 7.g3 0-0 8.Bg2 Re8 9.0-0.

5.e3 e5 6.Nf3 (6.Be2 d4 7.Nf3 de3 8.fe3 e4 9.de4; 6.Nd2 Qd6 (6...Be7 7.Ngf3 Qd6 8.Be2 Be6 9.c4) 7.Ngf3 Be7 8.Be2 0-0 9.0-0) 6...Bd6 7.Be2 (7.c4 dc4 (7...d4 8.ed4 ed4 9.Be2) 8.dc4 e4= (8...Bg4 9.Nbd2) 9.c5) 7...0-0 (7...e4 8.Nd4= (8.de4 de4 9.Nd4) 8...0-0 9.Nc6) 8.0-0= Bg4 (8...e4 9.de4=+ (9.Nd4=); 8...Bf5 9.Nbd2) 9.h3 (9.c4 dc4 10.dc4 Bf3 11.Bf3 e4=; 9.Nbd2=+) 9...Bh5 (9...Bf3 10.Bf3 e4 11.Be2=) 10.Nbd2 Re8 11.Rc1 (11.c4 dc4 12.Nc4 b5 13.Nd6 cd6 14.Ne5 de5 15.Bh5 Nh5 16.Qh5 Qd3=) 11...e4 12.Nd4 (12.de4 de4 13.Nd4 Be2 14.Qe2 Nd4 15.Bd4 a5=) 12...Be2=+ 13.Qe2 Nd4 14.Bd4 Rc8 (14...a5 15.de4 Ne4 16.Ne4 Re4 17.Qb5=) 15.Bb2 (15.c4 Be5=) 15...c5=+ 16.de4 (16.bc5 Bc5 17.de4 de4=) 16...de4 (16...cb4 17.ed5 Nd5 18.Qg4=+) 17.c3 (17.b5!?=) 17...Qe7=+ 18.Nc4 (18.Rcd1=+) 18...cb4 (18...Bb8!?-/+) 19.Nd6= Qd6 20.cb4 Qe6 (20...b5 21.Rfd1 Rc1 22.Rc1=) 21.Rfd1 (21.Rc8 Rc8 22.Rd1 b5=) 21...Rc1 22.Rc1 Rd8 (22...Nd5 23.Qh5=) 23.Bf6 Qf6 24.Rd1 (24.Qg4 Qe7=) 24...Rc8 (24...b5 25.a4 Rd1 26.Qd1=) 25.a4 White prepares b5 (25.Qg4 Qc6+=) 25...Qe5 (25...h6 26.b5=) 26.b5+= ab5 (26...Qe6 27.Qd2+=) 27.Qb5 Qb8 (27...Qb5 28.ab5 b6 29.Rd7+-) 28.a5 (28.Qf5 b6 29.Qe4 Qc7+-) 28...h6 29.Rb1 Rc6?? (better 29...Rc7+-) 30.Qc6!!+- bc6 (30...Qe5 31.Qb5 Qc7 32.Qe8 Kh7 33.Qe4 f5 34.Qf5 Kh8+-) 31.Rb8 Kh7 32.a6 (32.a6 Kg6 33.a7 h5 34.a8Q Kh6 35.Qc6 Kg5 36.Rb5 f5 37.h4 Kh4 38.Qg6 f4 39.Qh5) 1–0. Herciu,Ana_Maria – Copilu,Codruta_Alexa, CN Juniori Voineasa – F10, 2009.

5.e3 e6 A) 6.Nf3 h6 (6...Bd6 7.Be2 0-0 8.0-0 Qe7 9.Nc3; 6...Bd7 7.Nc3 Bd6 8.Be2 0-0 9.Qd2) 7.Nc3 Bd6 8.Be2 e5 9.0-0; B) 6.Be2 e5 (6...Bd7 7.Nf3 Bd6 8.Nc3 0-0 9.0-0; 6...Bd6 7.Nf3 0-0 8.0-0 Qe7 9.Nc3) 7.Nf3 Bd6 8.0-0 0-0 9.Nbd2; C) 6.Nc3 Bd6 (6...Bd7 7.Nf3 Bd6 8.Be2 0-0 9.0-0; 6...h6 7.Nf3 Bd6 8.Be2 e5 9.0-0) 7.Nf3 0-0 8.Be2 e5 9.0-0.

5.e3 g6 A) 6.Be2 Bg7 (6...Qd6 7.Nf3 Bg7 8.Nc3 0-0 9.0-0) 7.Nf3 Bf5 8.Nc3 Qd6 9.e4; B) 6.Nf3 Bg7 (6...Bf5 7.Nc3 Bg7 8.d4 0-0 9.Bd3) 7.Nc3 0-0 8.Be2 Bf5 9.0-0.

5.Nf3 g6 6.Nbd2 (6.g3 Bh6 7.Bg2 0-0 8.0-0 Qd6 9.Nbd2; 6.e3 Bg7 7.Be2 0-0 8.Nc3 Bf5 9.0-0) 6...Bg7 7.g3 0-0 8.Bg2 Ng4 9.Bg7.

5.Nf3 e6 6.c4 Bd6 7.cd5 ed5 8.Be2 0-0 9.0-0 Re8 10.Re1 Ne5 (10...Bg4 11.h3 Bf5 12.Nc3=) 11.d3 (11.Ne5 Be5 12.Be5 Re5=) 11...Nf3 12.Bf3 c6 13.Nd2 h6 14.Be2 Bf5 15.Nf3 a5 16.Qb3 a4 17.Qd1 c5 (17...Bc7 18.Rc1=) 18.bc5 Bc5 19.Rc1 Qd6 20.Nd4 (20.Rc3=) 20...Bg6 (better is 20...Bd4!? 21.ed4 Re7+=) 21.Nb5+/– Qb6 22.d4 (better is 22.Bf6!? gf6 23.d4+/–) 22...Be7= 23.Qd2 (23.Bf1!?=) 23...Ne4-/+ 24.Qd1 Rac8 (better is 24...Ra5!?-/+) 25.f3 Nd6 26.Qa4 Ra8 (26...Bg5 27.Bf1=) 27.Qb3+= Nb5 (27...Bg5 28.f4 Bh4 29.g3+- (29.Qd5 Be1 30.Qd6 Qa5+=)) 28.Qb5 (28.Bb5 Red8+/–) 28...Qb5 29.Bb5 Red8 30.a4 Bb4 31.Re2 Rdc8 32.Rc8 Rc8 33.Kf2 Rc2 34.Rc2 Bc2 35.Ke2 Bb3 36.Kd3 Kf8 37.e4 Ke7 38.Bc3 Bc3 39.Kc3+- Ba2? 40.ed5 Bd5+/– 41.Bc4 Kd6 42.Bd5+- Kd5 43.Kd3 f5 44.h4 g5 45.hg5 hg5 46.g3 b6 47.Kc3 Kd6 48.Kc4 f4 49.gf4 gf4 50.Kb5 1–0. Fournier,Frederic – oger, Online chess match, 2012.

5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 e6 8.d4 Bd6 9.Nd2 Ne7 10.0-0 0-0 11.c4 c6 12.cd5 cd5 (worse is 12...Ned5 13.e4+-) 13.Rc1 Nc6 14.Re1 Qc7 15.h3 Rac8 16.e4 de4 17.Ne4 Ne4 18.Be4 Qd7 (18...Bh2 19.Kh1 Bf4 20.Rc4+=) 19.Qd3 g6 20.d5 ed5 21.Bd5 (21.Bd5 Be5 22.Be5 Ne5 23.Qe4+/–) 1–0. Fournier,Frederic – ranaplana, Active, 2008.

4.c4 dc4!? 5.e3 b5=+.

4.c4 d4 5.Nf3= a6 6.e3 de3 7.fe3 g6 8.d4 Bg7 9.d5 Nb8 10.e4 c6 11.e5 Ne4 12.Bd3 (better 12.Be2+=) 12...Ng5?? (better 12...cd5 13.Bc2 Be6=) 13.Ng5+- cd5 14.0-0 dc4 (14...0-0 15.Qf3 Nd7 16.Qg3+- (16.Qd5?! e6 17.Ne6 fe6 18.Qe6 Kh8+-)) 15.Bc4 Qd1 16.Bf7 Kf8 17.Rd1 Be5 (17...Nc6 18.Bc4 Be5 19.Rd8 Nd8 20.Be5 h6+-) 18.Be5 (better 18.Rd8 Kg7 19.Be5 Kh6 20.Rh8 Kg5 21.Rc8 Nd7 22.Ra8 Ne5+-) 18...Nc6 19.Bh8 Bf5 (19...h6 20.Ra2 hg5 21.Rf2+-) 20.Be6 (20.Rf1 e5+-) 20...Be6 21.Ne6 Kf7 22.Ng5 Kg8 23.Bb2 e5 24.Nc3 (24.Rd7!? Rc8+-) 24...Rf8 25.Nce4 Rf4 26.Rd7 Nd4 27.Bd4 h6 (27...Rf5 28.Rc1 h6 29.Rc8 Rf8 30.Nf6 Kh8 31.Rf8) 28.Rc1 hg5 (28...Rf8 29.Rc8! Rc8 30.Nf6 Kf8 31.Ne6) 29.Rc8 Rf8 30.Nf6 Kh8 31.Rh7 (31.Rf8) 1-0. black_bishop_88 (2620) - XbilinmeyenX1, Hourly SuperBlitz Arena, lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 Nc6)

4.d4 a6 5.Nc3 e6 6.Nf3 Be7 7.g3 0-0 8.Bg2 Bd7 9.0-0 h6 10.Qd3 Na7 11.Rfe1 Nb5 12.a4 Nc3 13.Bc3 b5 14.a5 Ne4 15.Ne5 Nc3 16.Qc3 Be8 17.Nc6 Bc6 18.Qc6 Bb4 19.Rec1 Bd6 20.c3 Qf6 21.f4 Qf5 22.e3 Qd3 23.Kf2 Qg6 24.Rab1 Ra7 25.Rb2 Raa8 26.Bf3 Rfc8 27.Rcb1 Kh8 28.Rg1 Ba3 29.Rb3 Bd6 30.Rbb1 Kg8 31.h4 Qf5 32.g4 Qf6 33.g5 hg5 34.Rg5 Qh6 35.Rh5 Qg6 36.Rg1 Qc2 37.Kg3 f6 38.Kh3 Qf2 39.Rg3 Re8 40.Qd7 Re7 41.Qc6 Rf8 42.Bg2 Qe2 43.Rh6 Kf7 44.Rh7 Rg8 45.Qa6 Qd3 46.Qb7 Qh7 47.Qb5 Qf5 48.Kh2 Qc2 49.a6 Qc3 50.a7 Qa1 51.Bh3 Qa7 52.Rg1 Rb8 53.Qe2 Rb3 54.Qg4 Kg8 55.h5 Re3 56.h6 g5 57.Kh1 Bf4 58.Qh5 Kh7 59.Rg2 Qd4 60.Qg4 Re1 61.Rg1 Rg1 62.Qg1 Qg1 63.Kg1 Kh6 64.Kf2 f5 65.Bf5 ef5 66.Kf3 (66.Kg2 d4 67.Kf1 d3 68.Kg2 d2 69.Kf2 g4 70.Kf1 d1Q 71.Kf2 Re2) 66...Re3 (66...d4 67.Kg2 d3 68.Kf2 d2 69.Kf3 d1Q 70.Kf2 Re2 71.Kf3 Qd3) 67.Kf2 d4 68.Kf1 (68.Kg2 d3 69.Kf1 d2 70.Kf2 g4 71.Kf1 d1Q 72.Kf2 Re2) 68...d3 69.Kf2 (69.Kg2 d2 70.Kf2 g4 71.Kf1 d1Q 72.Kf2 Re2) 69...d2 70.Kg2 d1Q 71.Kf2 Qe2 (71...Qf3 72.Kg1 Re1) 72.Kg1 Rg3 73.Kh1 Qg2 (73...Qh5) 0–1. WarlpiriMan – TIGS5050 (1865), ChessWorld.net, 2017.

4.Nf3 d4 =.

4.Nf3 e5 5.Ne5+= Ne5 6.Be5 Qe7 7.d4 Qe6 (7...Ng4!? 8.Bg3 Nf6-/+) 8.Bc7 Bd6 (8...Qc6 9.Be5-/+) 9.Bd6+- Qd6 10.e3 0-0 11.Bd3 Bg4 12.f3 Bd7 13.0-0 Nh5 14.Qd2 f5 15.c4 Qg6 16.cd5 Qg5 17.e4 f4 18.e5 Bh3 19.Nc3 Rac8 20.Ne4 Qg6 21.Nf6! gf6 22.Bg6 hg6 23.gh3 g5 24.Qd3 Rc7 25.Qg6 Kh8 26.Qh5 Rh7 27.Qg6 Rg7 28.Qh6 Rh7 29.Qf8 1–0. market (1765) – chessting, GameColony.com, 2002.

4.Nf3 Bg4!? =.

4.g3 e5 5.Bg2 (5.b5 Na5 6.Be5 Nc4=) 5...Bg4 (5...a5 6.b5 Nd4 7.Bd4 ed4 8.Nf3+=) 6.d3 (6.h3 Be6+=) 6...Nd4 (6...a5 7.h3 Be6 8.b5+=) 7.Nd2 e4?? (better is 7...Bd6+=) 8.Bd4+- ed3 9.cd3 Bd6 (9...a5 10.b5+-) 10.Ngf3 (10.Bf6!? Qf6 11.Bd5 0-0-0+-) 10...0-0 11.0-0 Bf3 (11...Re8 12.h3 Bf5 13.Re1+-) 12.Nf3 c6 13.Nh4 (13.Qd2 Re8+-) 13...Re8 14.Nf5 Re6 (14...Be5 15.e3+-) 15.Nd6 Qd6 16.f4 (16.e3 a5+-) 16...Qe7 17.Bc5 Qe8 18.Re1 b6 19.Bd4 c5 (19...Qe7 20.f5 Rd6 21.e3+-) 20.bc5 bc5 21.Bc5 Rc8 (21...Qb5 22.Rc1+-) 22.Bd4 (22.Ba7 Rec6+-) 22...Ng4 (22...Rb8 23.Ba7 Rb2 24.Bd4 Rbe2 25.Re2 Re2 26.Bf6 Qe3 27.Kh1 gf6 28.Bd5+-) 23.Bh3 (23.e4 Nh6+-) 23...Ne3 (23...f5 24.Ba7 Qh5 25.Bg4 Qg4 26.e3+-) 24.Be3 Re3 25.Bc8 Qc8 26.Qc1 Qh3 (26...Qe8+-) 27.Qe3 (27.Qe3 Qe6 28.Qa7+-) 1–0. Austin,J – Vallade,J, Detroit ch–MI, 1991.

4.g3 Bf5 5.Nf3 +=.

4.g3 g6 5.Bg2 Bg7 6.Nf3 0-0 7.0-0 Bg4 8.d3 Qd7 9.Nbd2 Bh3 10.c4 Bg2 11.Kg2 Rad8 12.Rc1 d4 13.c5 Bh6 14.Rc2 Qd5 15.Ba1 Ne5 16.Qb1 Bd2 17.Rd2 Nf3 18.ef3 Ng4 19.h3 Ne5 20.Re1 Nf3 21.Re4 Nd2 22.Qc1 Ne4 23.de4 Qe4 24.Kg1 d3 25.Qd2 Qe2 26.Qh6 f6 27.Bd4 d2 28.Bf6 d1Q 29.Kg2 Qdf1 30.Kh2 Qef2 Normal 0-1. NoTheories (2145) - bengubar86 (2270), Rated Bullet game, lichess.org, 2015.

4.e3 (--> 3.e3 Nc6 4.a3).

4.e3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Nc6).

4.e3 c6 5.c3 (5.Nf3 e6=) 5...b5 (5...e5 6.c4=+) 6.Qb3 (6.a4 ba4 7.Qa4 Qb6=) 6...e6 7.a4 Nb6 (7...ba4 8.Qa4 Qb6 9.Nf3=) 8.a5 (better 8.ab5 cb5 9.Bb5 Bd7 10.Ba6+-) 8...Nc4=+ 9.Bc4 (9.Bc1!?=+) 9...dc4-/+ 10.Qc2 c5 11.Ba3 cb4 12.cb4 (12.Bb4 Bb4 13.cb4 Bb7-/+) 12...Bb7 13.Nf3 Be7 (13...Bf3 14.gf3 Qd5 15.Qd1-/+) 14.Nc3 Qd7 15.0-0-0 (15.Ne5 Qd6 16.f4 a6-/+ (16...Bg2?! 17.Nb5 Qb8 18.Rg1 Qb5 19.Rg2=)) 15...Qd3 (15...Rd8 16.Ne5 Qc7 17.f4-+) 16.Qb2? (16.Qd3 cd3 17.Nb5 Rc8 18.Kb2 Rc2 19.Kb3 Ne4=) 16...Ne4 (better 16...Ng4 17.Nb5 Bf6-+) 17.Ne1? (17.Ne4 Be4 18.Ne1 Qb3 19.Qb3 cb3=+) 17...Qd7?? (better 17...Nf2 18.Nd3 Nd3 19.Kc2 Nb2 20.Kb2 Bf6-+) 18.Ne4=+ Be4 19.f3? (19.Qg7 Rf8=+) 19...Bg6 (better 19...Bf6 20.Qa2 Bd3 21.Nd3 cd3-+) 20.Qg7= Rf8 21.Qc3 a6 (21...Bd3 22.Nd3 cd3 23.Kb1=+) 22.e4 (better 22.d4+=) 22...Bg5?? (better 22...f5 23.ef5 Rf5=) 23.h4+- Bf4 24.Nc2?? (better 24.h5!?+-) 24...Qd3? (better 24...h5!?+=) 25.Qf6+- e5 (25...Bd6 26.h5 Be4 27.fe4 Qe4 28.Rhg1+-) 26.Qc6 (26.h5 Be4 27.fe4 c3 28.Qc6 Ke7 29.Qb7 Ke6+-) 26...Ke7 27.Qb7 Kf6 (better 27...Kd6 28.Qb6 Kd7+-) 28.Bb2?? (better 28.h5 c3 29.hg6 cd2 30.Kb1=) 28...h5 (28...Rfc8 29.Kb1 h5 30.Qb6 Kg7 31.Qf2=) 29.Qc6 (29.Ne3 Kg7 30.Nd5+-) 29...Kg7= 30.Qc5 (30.Ne1 Qb3 31.g3-/+) 30...Rac8 (better 30...Rfe8 31.Kb1 Rad8=+) 31.Be5+- Be5 (31...Kh7!? 32.Qd4 Be5 33.Qe5 f5 34.ef5 Bf5+-) 32.Qe5+- Kh7 33.Qc3 Rfd8 34.Qd3?? (better 34.Rhe1+-) 34...cd3-+ (34...Rd3? 35.Rhe1+-) 35.Kb2 Rc2 36.Kb3 (36.Ka1 Rd4 37.Rhe1 Rb4-+) 36...f5 37.Rde1 (37.Ra1 fe4 38.Rhc1-+) 37...Bf7 38.Ka3 Ra2 0–1. TWW_LONDON (1635) – hafizh13 (1650), lichess.org, 2020.

4.e3 g6 5.c4 e6 6.Nc3 dc4 7.Bc4 Bg7 8.Nf3 0-0 9.0-0 c5 10.bc5 Nc5 11.Rc1 b6 12.d4 Nce4 13.Ne5 Bb7 14.Qb3 (better is 14.Ne4 Be4 15.f3+=) 14...Nd2-/+ 15.Qa2 Nf1 16.Nf7? (16.Bf1 Rc8-/+) 16...Rf7 (better is 16...Kf7!? 17.Be6 Ke8 18.Rf1 Ne4-+) 17.Be6-/+ Kh8 18.Bf7 Nh2 (better is 18...Nd2!?-/+) 19.Kh2= Ng4 20.Kg3 Qd6?? (better is 20...h5 21.Qe6 h4 22.Kg4 Bc8=) 21.Kg4+- Qh2 22.Bd5 Rf8? (22...Qh5 23.Kg3 Bf6=) 23.f4 (23.Bb7 h5 24.Kg5 Rf5 25.Kg6 Qh4 26.Qg8 Kg8 27.Bd5 Rd5 28.Nd5 Qg4) 23...g5 24.g3?? (24.Kf3 gf4 25.Bb7 Qg3 26.Ke2 Qe3 27.Kd1 Qd3 28.Ke1 Re8 29.Ne4 Re4 30.Be4 Qe4 31.Kf1 Qd3 32.Kg1 Qe3 33.Kh1+-) 24...h5 (better is 24...Bc8!? 25.Be6 Be6 26.Qe6 Qb2-/+) 25.Kf3+/– Re8 26.e4 Bd4 27.e5 gf4?? (better is 27...Bd5 28.Qd5 Qb2-+) 28.gf4?? (28.Bb7 Qg3 29.Ke2 Qe3 30.Kd1 Qd3 31.Ke1 Re5 32.Ne4 Qe3 33.Kd1 Qd3 34.Ke1 Qe3 35.Kf1 Qf3 36.Ke1 Qe3=) 28...Qf2 29.Ke4 Qe3 30.Kf5 Bc8 (30...Re5 31.fe5 Qe5 32.Kg6 Qf6 33.Kh5 Qf5 34.Kh4 Bf2) 31.Kf6 (31.Be6 Rf8 32.Kg6 Qg3 33.Kh6 Qf4 34.Kh5 Rf5 35.Bf5 Qf5 36.Kh4 Qg4) 31...Qf4 32.Kg6 Qf5 33.Kh6 Be3 0–1. Puru,B – Sampouw,Jacobus S (2315), Asia–chT fin, 1977. (=1.a3 Nf6 2.b4 d5 3.Bb2 Nbd7)

4.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7).

(--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

5.c4 dc4 6.Bc4 Bd6 7.Nf3 0-0 (---> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 dc4 7.Bc4 0-0).

5.d4 Bd6 6.Nf3 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.d4).

5.e3= Nb6 6.Be2 Na4 (6...Bg4 7.Bf6 gf6 8.Nc3=) 7.Bd4+= e6 (7...Bg4 8.c3 b5 9.Ne5 Be2 10.Qe2+=) 8.c4 c5 (8...Nb6 9.c5 Nbd7 10.0-0+=) 9.Qa4 Bd7 10.Qb3 cd4 11.Nd4 Rc8 (11...dc4 12.Bc4 Rc8 13.0-0+=) 12.0-0 dc4 13.Bc4 Be7 14.d3 0-0 15.Nc3 a6 16.b5 ab5 (16...Qa5 17.Rfb1+=) 17.Ncb5 (17.Ndb5 Qa5+/–) 17...Bb5 (17...Rc5 18.Nc3+/–) 18.Qb5 Qc7 (18...Rb8 19.Rfb1+/–) 19.Rfc1 (better is 19.Rfb1 Rb8 20.Be6+/–) 19...b6?? (better is 19...Kh8+/–) 20.Ne6!+- Qd6 (20...fe6 21.Be6) 21.Nf8 Rf8 22.d4 Ne4 (22...Ng4 23.Qh5 Nf6 24.Qe5+-) 23.Bd3 f5 (23...Nf6 24.Rc6 Qd7 25.Rb6+-) 24.Rc6 Qd7 25.Rb6 h6 (25...Qd8+-) 26.Qd7 (26…Bf6 27.Qf5+-) 1–0. lucya (2110) – hispano (1765), GameColony.com, 2002.

5.e3= Qc7 6.d4 g6 (6...Nb6 7.Nbd2=) 7.c4+= Bg7 8.Nc3 e6 9.Bd3 0-0 10.0-0 Re8 11.Rc1 (11.Qc2 Nb6 12.c5 Nbd7+=) 11...dc4 (11...e5 12.Be2 e4 13.Nd2 dc4 14.Nc4+=) 12.Bc4 Nd5 (12...a6!?+=) 13.Nd5+/– ed5 14.Bd5! Qd8 (14...cd5 15.Rc7) 15.Ba2 Nf6 16.Ne5 Nd5 (16...Be6 17.Be6 Re6 18.Re1+/–) 17.e4 (better is 17.b5 Be6 18.bc6 Be5 19.de5 bc6 20.Qf3+-) 17...Nb6?? (better is 17...Be5 18.de5 Nf4+/–) 18.Bf7 Kh8 19.Be8 Qe8 20.f4 Nd7 (20...Be6 21.b5+-) 21.d5 Ne5 22.fe5 Be5 (22...Kg8 23.Qb3+-) 23.Be5 (23...Qe5 24.dc6+-) 1–0. guest2511 – guest910, ICC, 2003.

5.e3= e6 6.c4=.

5.c4 Bg7 (5...dc4 6.e4=) 6.cd5+= 0-0 7.Nc3 Nd5 8.Nd5 (8.e4 Nc3 9.dc3 c5=) 8...Bb2=+ 9.Rb1 Bg7 (worse 9...Ba3 10.Qb3 Nb6 11.Nc3 Bb4 12.Qb4+-) 10.e3 c6 11.Nc3 e5 12.Bc4 Qe7 13.h4 (13.Qc2 a5=+) 13...a5 (13...e4 14.Nd4-/+) 14.h5=+ ab4 15.ab4 Nb6 16.Bb3 Be6 (better 16...g5!?-/+) 17.hg6= hg6 (worse 17...fg6 18.Be6 Qe6 19.Ng5+-) 18.Ne4 Bb3 19.Qb3 Nd5 The isolani on b4 becomes a target 20.Nfg5? (20.b5 Qa3 21.Qa3 Ra3 22.bc6 bc6=) 20...Ra6 (20...f5!?-+) 21.Ke2 (21.b5 Rb6 22.Qc4 Nc7=+) 21...Rfa8 (21...f5 22.Nh7 fe4 23.Nf8 Kf8 24.b5=+) 22.Nf3 (better 22.b5 Ra3 23.Qc4=+) 22...Qd7?? (better 22...Rb6 23.Qc4 Rb4 24.Rb4 Nb4-/+ (24...Qb4?! 25.Qb4 Nb4 26.Rb1=)) 23.Nc5+- Qg4 (23...Qe7!? 24.Na6 Ra6+-) 24.Na6 Ra6 25.Rh4 Qg2?? (better 25...Qe6 26.b5 Rb6+-) 26.Rg1 (26.Rg1 Qg1 27.Ng1+-) 1–0. FeegLood (2530) – K_Abad (2365), lichess.org, 2015.

5.e3 Bg7 6.c4 c6 7.cd5 cd5 8.Bb5 a6 9.Ba4 0-0 10.0-0 b5 11.Bb3 Nb6 12.d3 Bb7 13.Bd4 Rc8 14.Nbd2 Ne8 15.Bg7 Kg7 16.Qe2 f6 17.Nd4 Qd6 18.f4 Nc7 (18...e5 19.fe5 fe5 20.Rf8 Kf8 21.Rf1 Kg7 22.N4f3=) 19.g4 (19.f5!?+=) 19...e5= 20.fe5 fe5 21.N4f3 Ne6 22.Rfc1 e4 23.Nd4 (23.Ne1 Ng5 24.Rc8 Bc8-/+ (24...Rc8?! 25.Rd1+=; worse is 24...Nc8 25.Qg2-/+)) 23...Nd4-/+ 24.ed4 ed3 25.Qd3 Qf4 26.Rf1 Qg4 27.Kh1 Nc4 28.Rg1 (28.Rae1!?-/+) 28...Qf4 29.Ra2 (29.Rg2 Nb2 30.Qh3 Qd4-+) 29...Nd2 (better is 29...Rce8!? 30.Nb1-+) 30.Qd2?? (better is 30.Rd2 Qe4 31.Qe4 de4 32.d5-+) 30...Qf3 (30...Qf3 31.Rg2 Qb3-+) 0–1. sbeaul (2470) – mpenga (2585), net–chess.com, 2016.

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5).

4.d4 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.d4).

4.d4 b6 5.e3 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.d4).

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3).

4.e3 a5 5.b5 c6 6.bc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.bc6).

4.e3 c5 5.bc5 Bc5 6.d4 Bd6 7.Nf3 0-0 8.c4 Nc6 9.Nbd2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6 8.Nbd2 0-0 9.c4).

4.e3 c5 5.bc5 Bc5 6.Nf3 0-0 7.Be2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0).

4.e3 Bd6 5.c4 c6 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0-0 6.c4 c6).

4.e3 Bd6 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3).

4.e3 Bd6 5.Nf3 0-0 6.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.d4 0-0 6.e3).

4.e3 Be7 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3).

4.e3 Be7 5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3).

4.Nf3 a5 5.b5 c5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.Nf3).

4.Nf3 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.Nf3 c5 5.bc5 Bc5 6.e3 0-0 7.Be2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0).

4.Nc3 e5 5.e3 a5 6.b5 Bd6 7.a4 0-0 8.Nf3 e4 9.Nd4 Bg6 10.Nde2 (10.Be2 Re8=) 10...Nbd7 11.g3 (11.Nd4 Nb6=+) 11...Ne5-/+ 12.Bg2 Nc4 13.Bc1 Ne5 (13...Bh5 14.0-0-/+) 14.Nf4 (14.Bb2 Bh5 15.0-0-/+) 14...Bb4-/+ 15.Nce2 Rc8 16.0-0 Nf3 (16...c6 17.Ba3=+) 17.Kh1 (17.Bf3 ef3 18.Nd4 Qd6=) 17...Bf5 (17...Nh5 18.c3 Bd6 19.Ng6 fg6 20.d3=) 18.c3 (18.Bf3 ef3 19.Nd4 Qd7=) 18...Bd6 19.Qb3 (19.Bf3 ef3 20.Nd4 Qd7 21.Nf3 Ne4=) 19...c6 (19...c5 20.d3 Qd7 21.de4 de4 22.Nd5 Nd5 23.Qd5-/+) 20.Bf3 ef3 21.Nd4 Bg4 22.Bb2 g5 23.bc6 bc6 24.Nc6 Rc6 25.Nd5 Be6 26.c4 Ne4 27.d3 Nd2?? 28.Qc3+- Be5 29.Qe5 f6 30.Nf6 Rf6? 31.Qg5 Kf7 32.Qh5 Kf8 33.Bf6 Qf6 34.Rfd1 Qg7 35.Rac1 Qb2 36.Qh7 Rd6 37.Qh6 Ke7 38.Qg5 Kf7 39.d4 Bc4 40.Qa5 Qa3 41.Qc7 Kg8 42.Rc4 Nc4 43.Qc4 Kg7 44.Rc1 Re6 45.Qc7 Re7 46.Qc5 Qc5 47.Rc5 Ra7 48.a5 Kf6 49.g4 Ke7 50.e4 Ke6 51.h4 Rd7 52.Rc6 Ke7 53.d5 Ra7 54.a6 Kd8 55.Kh2 Rh7 56.Kg3 Rf7 57.Re6 Kc7 58.g5 Rf8 59.Rc6 Kb8 60.Rf6 Rc8 61.Kf3 Ka7 62.Kg4 Rc4 63.f3 Ra4 64.h5 Ra2 65.h6 Rg2 66.Kf5 Rh2 67.f4 Rh1 68.e5 Rh2 69.Kg6 Rc2 70.Rc6 Rh2 1–0. NN – SuperConstellation4, 1988.

4.c4 c6 5.cd5= cd5 6.Nf3 e6 7.e3 h6 8.Qb3 Be7 9.Bd3 Bd3 10.Qd3 0-0 11.0-0 Nc6 12.Nc3 Rc8 13.Qe2 Nd7 14.Rac1 Bf6 15.Na4 Bb2 16.Nb2 Qf6 17.d4 Nb6 18.Nd3 Nc4 19.b5 N6a5 20.a4 Qe7 21.Nde5 (21.Rc3 Nd6 22.Rfc1 Rc3 23.Rc3 Nac4=) 21...Rc7 (21...Nb3 22.Rc2 (worse 22.Nc4 Nc1 23.Rc1 Qb4-+) 22...Qb4 23.Nc4 dc4 24.Ra2=) 22.Nc4= Nc4 23.Rc3 (23.Nd2 Rfc8=) 23...Rfc8 (23...Qb4!? 24.Rfc1 Qa4-/+) 24.Rfc1=+ Nb6 25.Qd2 (25.Rc7 Rc7 26.Ra1 Qb4=+) 25...Na4 26.Rc7 Rc7 27.Ra1 Nc3 28.Ra7 Nb5 29.Ra8 Kh7 30.Qd3 g6 31.h4 Nd6 32.h5 Ne4 33.hg6 fg6 34.g3?? (better 34.Qb1-/+) 34...Qf6-+ 35.Kg2 Rf7 36.Qe2 (36.Qd1 Nc3 37.Ng5 Qg5-+) 36...Nc3 37.Ng5 hg5 38.Qc2 (38.Qf1 Qf3 39.Kh2 Qh5 40.Kg1 Ne2 41.Kg2 Qf3 42.Kh2-+) 38...Qf3 39.Kg1 (39.Kh2 Ne2 40.Qg6 Kg6 41.Rg8 Kf6 42.Rg6 Kg6 43.e4 Rh7) 39…Ne2 (39...Ne2 40.Qe2 Qe2 41.f4 Rc7 42.Ra1 Rc2 43.e4 Qg2) 0-1. black_bishop_88 (2735) - Nasanjargal_Urtnasan (2685), lichess.org, 2020. (=1.a3 d5 2.b4 Bf5 3.Bb2 Nf6)

4.d3 Nc6 5.h3 g6?? (5...e5 6.b5 Nd4 7.e3 Nb5 8.Qf3=+) 6.c3?? (better 6.g4 Bd7 7.g5+-) 6...Bg7 7.e3 0-0 8.Nf3 e5 (8...a5 9.b5 Nb8 10.g4=) 9.Be2 (9.b5!? Ne7 10.Ne5+=) 9...e4=+ 10.de4 Be4 11.Bd3 (11.Nbd2 Qe7=) 11...a5 12.Nbd2?? (12.0-0!?=+) 12...ab4 (12...Bd3 13.Nb3 Ba6 14.Nc5-+) 13.cb4?? (better 13.Be2 ba3 14.Ra3 Ra3 15.Ba3-/+) 13...Bd3-+ 14.Qb3 Be4 15.Ne4 de4 16.Nd4 (16.Nd2 Qe7-+) 16...Nd5 (better 16...Ne5!? 17.0-0 Nd3 18.Rfd1-+) 17.Nc6 bc6 18.Bg7 Kg7 19.Qb2 (19.0-0 Qf6-+) 19...Kg8 (19...Qf6!? 20.Qf6 Kf6 21.0-0-+) 20.0-0 Qg5 21.Rac1 (21.Rfc1 f5 22.Qa2 Rf7-+) 21...f5 22.Rc6 (22.Rc5 f4 23.ef4 Rf4 24.Rc6 Rf3-+) 22...f4 23.Qb3 (23.Re1 fe3 24.fe3 Rf3-+) 23...fe3 24.f4 (24.h4 Qf5 25.Rc2 c6-+) 24...Qf5 (24...ef3 25.Rc2 e2 26.Re2 fe2 27.Rf8 Rf8 28.Qb1 Rf1 29.Qf1 Qe3 30.Qf2 e1Q 31.Kh2 Q1f2 32.b5 Qg1) 25.Rc5 Rad8 26.Rd1 (26.Qc4 Qe6-+) 26...e2 27.Re1 Rf7 (27...Qf4!? 28.Rd5 Qf7 29.Re2-+) 28.Re2 Qe6 (28...Qf4 29.Qd1-+) 29.Qg3 (29.g3-+) 29...Nf4 30.Re3 (30.Rec2 e3 31.R5c3 Rd1 32.Kh2 e2-+) 30...Rd1 31.Kh2 Rd2 32.Qg5 (32.Rg5-+) 32...Rg2 33.Kh1 Rg5 34.Rc7 Rc7 35.Re4 (35.b5 Rc1 36.Kh2 Rg2) 0–1. TWW_LONDON (1640) – fcarniel (1645), lichess.org, 2020.

4.d4 e6 5.Nd2 Be7 (5...a5 6.b5=+) 6.Ngf3 0-0 7.e3 h6 (7...a5 8.b5=+) 8.c4 (8.Nb3 Bd6=) 8...c6 9.Be2 Nbd7 (9...a5 10.ba5 Qa5 11.c5=) 10.c5 (10.0-0 a5=) 10...b6 11.Nb3 (11.Rc1 Qc7=) 11...bc5 (11...a5 12.Ne5 Qc8 13.g4=+) 12.dc5 Qc7 13.0-0 Rfe8 (13...e5 14.Nfd2=) 14.Nbd2 (14.Nbd4!? Be4 15.Qa4 Bf3 16.gf3+=) 14...a5= 15.Nh4 (15.Nd4 Bg6=) 15...Bh7=+ 16.Nhf3 ab4 (16...Reb8 17.Bc3=+) 17.ab4= Qb7 (17...Reb8 18.Ra8 Ra8 19.Qb3=) 18.Bc3 Ra1 19.Qa1 Ra8 20.Qd1 (20.Qb2 Rb8 21.Qa2 Ne4 22.Ne4 Be4=) 20...Bd8 (20...Ra3 21.Qc1 Ra2 22.Bd1=+) 21.Nb3 Ne4-/+ 22.Qc1 Bf6 23.Nbd4 e5 24.Nb3 Nc3 25.Qc3 e4 26.Qd2?? ef3-+ 27.Bf3 Ne5 28.Nd4 Nf3 29.Nf3 Be4 30.Nd4 Ra4 31.f3 Bg6 32.Nc2 Bc2 33.Qc2 Rb4 34.e4 Rb2 35.Qd3 Qb4 36.ed5 Qc5 37.Kh1 Qd5 38.Qa6 Qd2 39.Qc8 Kh7 40.Qf5 Kg8 41.Qc8 Bd8 42.Qh3 c5 43.Qg4 c4! 44.f4 c3 45.Rd1 (If White now only could play h3...) 45...c2 46.Rd2 Rb1 (47.Qd1 cd1Q 48.Rd1 Rd1) 0–1. Geslot,Mickael – Fraval,Guy, Finistere–chT, 1999.

4.Nf3 c6 5.e3 Nbd7 6.Be2 e6 7.Nh4 Bd6 (7...Bg6 8.0-0=) 8.Nf5+= ef5 9.c4 dc4 10.d3 (10.Bc4 Nb6 11.Bb3 a5=) 10...cd3=+ 11.Qd3 0-0?? (better is 11...Ne4=) 12.Qd6+- Nb6 (12...a5 13.0-0+-) 13.Qd8 Rad8 14.Bf6 gf6 15.Nc3 a6 16.Rd1 Rd1 17.Kd1 Rd8 18.Kc2 Nc4 (18...f4+-) 19.Bc4 b5 (19...f4 20.e4+-) 20.Bd3 Kg7 (20...f4 21.ef4 h6 22.Rd1+-) 21.Bf5 Kh6 22.Rd1 Rg8 23.g3 Kg5 (23...a5 24.Rd6+-) 24.Bh7 Rh8 25.h4 Kg4 26.Rd4 Kh3 27.Be4 (27...Kg4 28.Bc6 Kf5 29.Bb7+-) 1–0. Double Wood – Barry49434, ChessWorld.net, 2005.

4.Nf3 h6 5.e3 Nbd7 6.Be2 g5 (6...e6 7.0-0=) 7.d3 Bg7 8.Nbd2 0-0 9.h4 Nh7? (better is 9...g4!? 10.Nd4 e6+=) 10.Bg7+- Kg7 11.Nd4 Be6 12.hg5 Ng5? (better is 12...hg5 13.Ne6 fe6+-) 13.f4 Rh8 (13...c5 14.bc5 (14.fg5?! cd4 15.gh6 Kh7+-) 14...Nh7 15.f5+- (15.Ne6 fe6 16.d4 Nhf6+-)) 14.N2b3 c5 15.bc5 (15.fg5?! cd4 16.gh6 Rh6 17.Rh6 Kh6 18.Nd4 Qc7+-) 15...Nc5 16.fg5 Na4 (16...Nb3 17.cb3 hg5 18.Rh8 Qh8 19.Ne6 fe6+-) 17.Ne6 fe6 18.Bh5 Qc7 (18...Qb6 19.gh6 Rh6 20.Qg4 Kh8 21.Kd2+-) 19.gh6 Rh6 20.Qg4 Kh8 21.Qa4 Qg3 22.Kd2 Qg2 23.Kc3 Rc8 24.Kb4 a5 (24...Qg3 25.Qd7 Rc2 26.Qe8 Qg8 27.Qg8 Kg8 28.Bf7 Kh7 29.Be6+-) 25.Qa5 Qg7 26.Nd4 Qe5 (26...Qg2 27.Kb3 Qf2 28.Bf7+-) 27.Qb6 Qe3 (27...Kh7 28.Bg4 Rf8 29.Rh6 Kh6 30.Rh1 Kg6 31.Bh5 Kh7 32.Bf7 Kg7 33.Ne6 Kf7 34.Rf1 Kg8 35.Rf8 Kh7 36.Ng5 Qg5 37.Qe6+-) 28.Bf3 Qd2 29.Kb3 Qc3 30.Ka2 Rh1 31.Rh1 Kg7 32.Rg1 Kh8 33.Qe6 (33...Qc2 34.Nc2 Rc2 35.Kb1 Rb2 36.Kb2 b5 37.Qg8) 1–0. marekt – jartug, ChessWorld.net, 2003.

4.f4 e6 5.e3 Be7 6.Nf3 Nbd7 7.Be2 c6 8.0-0 Qc7 9.c4 (9.Nh4 Be4=) 9...0-0 10.Nc3 Rfd8 (10...dc4!? 11.Bc4 b5=) 11.cd5+= ed5 (better is 11...Nd5!? 12.Nd5 A) worse is 12...ed5 13.Nd4 Bf6 A1) 14.Nf5?! Bb2 15.Rb1 Bf6= (15...Ba3? 16.Qb3+-); A2) 14.g4+/–; B) 12...cd5+=) 12.Nd4 (12.Nd4 Be4 13.d3+/– (13.Ne4?! de4 14.Nf5 Bf8=)) 1–0. Michailow,Sergej (2200) – Roggon,Jacob (2075), Bargteheider Cup 6th, 2003. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

4.h3 c6 5.e3 h6 6.g4 Bg6 7.f4 e6 8.Nf3 Nbd7 9.Nc3 Bd6 10.Na4 (10.Rg1 Qc7=+) 10...Rc8 11.c4 (11.Bd4 0-0=+) 11...dc4-/+ 12.Bc4? (12.d3 cd3 13.Bd3 Bd3 14.Qd3 Qe7-/+) 12...0-0 (12...b5 13.Be2 ba4 14.Qa4-+) 13.d3? (better 13.Nc3-/+) 13...b5-+ 14.Bf6 (14.g5 hg5 (14...bc4?! 15.gf6 Nf6 16.dc4=+) 15.Ng5 Qe7 16.Bf6 Qf6-+) 14...Nf6 (14...gf6?! 15.Nb2 bc4 16.Nc4-+) 15.f5 (15.Nb2 bc4 16.Nc4 c5 17.bc5 Bc5-+) 15...ef5 (15...bc4?! 16.fg6 cd3 17.0-0-/+; 15...ba4?! 16.fg6 Nd5 17.Bd5 (17.Qa4 Qf6 18.gf7 Rf7-+) 17...cd5 18.gf7 Rf7 19.Rf1=+) 16.gf5 Bf5 (16...bc4?! 17.fg6 cd3 18.Nb2-/+; 16...ba4 17.fg6 Nd5 18.gf7 (18.Qa4? Qf6 19.gf7 Rf7-+) 18...Kh8 19.Bd5 cd5 20.Rf1=) 17.Nh4 (17.e4 Bd7-+ (17...ba4?! 18.ef5 Re8 19.Kf2-+)) 17...Bh7 (better 17...Bg3!? 18.Ke2 Bh4 19.Qc2-+) 18.Nc5 (18.Ng2 bc4 (worse 18...ba4 19.Qa4 Bg3 20.Ke2-+) 19.dc4 Be5 20.Qd8 Rfd8-+) 18...bc4 19.Nb7 (19.Ng2 Bc5 20.bc5 Bd3-+) 19...Qc7 (better 19...Bg3 20.Kf1 Qd3 21.Qd3 Bd3 22.Kg2 Bh4 23.Nc5-+) 20.Nd6 Qd6 21.d4 (21.Qd2 Qg3 22.Qf2 Qf2 23.Kf2 cd3 24.Nf3-+) 21...Qg3 22.Kd2 Qh4 (22...Qf2 23.Kc1 c3 24.Qe2 Qe2 25.Ra2 Qa2 26.e4 Qb2 27.Kd1 Qd2) 23.Kc3 (23.Qe2 Rce8 24.Rhf1 Bd3-+) 23...Bd3 (23...Nd5 24.Kc4 Ne3 25.Kb3 Nd1 26.Rad1 Qg3 27.Kb2 Rfe8 28.Rd3 Re2 29.Kb3 Qd3 30.Ka4 Ra2 31.d5 Ra3) 24.Qf3 (24.Qe1 Qe4 25.Rg1 c5-+) 24...Nd5 25.Kd2 Qe4 (better 25...Be4 26.Qf1 Bh1 27.Qc4 Rce8 28.Rh1 Re3-+) 26.Qh5 (26.Qe4 Be4 27.Rhc1 c3 28.Rc3 Nc3 29.Kc3 f5-+) 26...Qg6 (26...Qe3 27.Kd1 Nc3) 27.Qf3 (27.Qg6 fg6 28.Rh2 Rce8-+) 27...Rce8 (better 27...c3 28.Kc1 Be4 29.Qf1 Ne3 30.Qg1-+) 28.Rag1 Qh7 29.b5 Re3 30.Qg2 Re2 31.Kd1 Rg2 (31...Rg2 32.Rg2 Qe4 33.Rgh2 Qe3 34.Rc2 Qf3 35.Kc1 Qh1 36.Kb2 c3 37.Kb3 Qb1 38.Rb2 Qb2 39.Ka4 Qb5) 0–1. zomboeb (1630) – Buyantogtokh (1675), lichess.org, 2019.

4.h3 e6 5.g4 Bg6 6.g5 Nfd7 7.h4 h5 (7...h6 8.Nh3=+) 8.Nh3 e5 9.e3 Bd6 10.d4 e4 11.c4 c6 (11...dc4 12.Bc4 Nb6 13.Be2=) 12.Nc3 dc4 13.Bc4 0-0 (13...b5 14.Be2=) 14.Ne2 (14.Be2!?+=) 14...Nb6 15.Bb3 Nd5 16.Bd5 cd5 17.Nef4 Be7 (17...a5 18.Nd5 ab4 19.ab4 Ra1 20.Qa1=) 18.Nh5 (18.Qb3 Nc6+/-) 18...Nc6 (18...a5!?=) 19.N3f4 a5 20.b5 (20.Ng6?! fg6 21.Nf4 ab4=) 20...Na7 21.a4 (21.Ng3 Bd6+/-) 21...Nc8 (21...Bb4 22.Kf1+=) 22.Ng6 fg6 23.Nf4 Qd6 (better 23...Bb4!? 24.Ke2 Nb6+/-) 24.Ba3+- Qd7 25.Be7 Qe7 (25...Ne7 26.h5+/-) 26.Ng6 (26.Nd5!? Qf7 27.Nf4 Nb6+-) 26...Qb4 27.Kf1 Rf3 28.Ne5 Rf5 29.h5 Nd6? (better 29...Ne7!?+-) 30.h6 Raf8 (30...g6 31.h7 Kg7 32.Ng6 Qc4 33.Qe2 Kg6+-) 31.h7 (31.h7 Kh8 32.Ng6) 1-0. black_bishop_88 (2630) - Zaubermensch (2055), Daily Blitz Arena, lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

5.e3 b5 (5...a5 6.Bc4 ab4 7.Nf3=+) 6.Nc3 (better 6.Bf6!? Bb1 7.Qb1 gf6 8.a4+=) 6...c6=+ 7.f4 e6 8.Nf3 Nbd7 9.Be2 Be7 10.Nd4 Qc7 (better 10...Qb6=+) 11.Bf3+/- 0-0? (11...a6 12.a4 ba4 13.Qa4+/-) 12.Bc6 (12.Nc6?! Rae8 13.Nb5 Qb6 14.Nba7 Nd5+-) 12...Rad8 13.Ncb5 Qb6 14.Bc3?? (14.Nf5 ef5 15.Nd4 Nc5 16.Nf5 Nd3 17.Kf1 Nb2 18.Ne7 Kh8+/-) 14...a6?? (14...Bd3 15.a4 e5 16.Bd7 Nd7 (16...Rd7?! 17.fe5 Nd5 18.Qg4=) 17.fe5 a6-+) 15.Nf5+- ef5 16.Nd4 g6 17.h4 Ne4 18.Be4 fe4 19.h5 Bf6 20.hg6 fg6 21.Qc2 Bd4 22.Bd4 Qe6 23.g4! Nf6 (23...Qg4 24.Qc4 Double attack (24.Qe4 Deflection)) 24.g5 (better 24.f5!? Qc6 25.fg6 hg6 26.0-0-0+-) 24...Nh5+/- 25.Bc3 Rf5 26.0-0-0 Qc6 27.Rdg1 a5 28.ba5 Rd3 29.Rh5! gh5 30.Rh1 Rb5 31.Rh5 Rb3 32.Bb2 Qb5?? (better 32...Qa4 33.Rh6 c3 34.dc3 Rd5+/-) 33.g6!+- hg6 (33...hg6 34.Rg5 Double attack (34.Rb5 Discovered attack; 34.Rg5 Decoy)) 34.Rb5 Rb5 35.Qc4 Rbd5 36.Bd4 (36.Bd4 Kf8 37.Qd5 Ke7 38.Qe4 Kf7 39.Qd3 g5 40.a6 gf4 41.ef4 Ke7 42.a7 Kd7 43.Qf5 Kc7 44.a8Q Kd6 45.Qe8 Kc7 46.Qfd7) 1-0. sprasad (2355) - vukavuka16 (2310), Rated Blitz game, lichess.org, 2015.

5.f3 e5-/+.

5.Nd2 a5 6.b5 c5 7.e3 Be7 8.Ne2 Qc7 (8...0-0 9.Be5+=) 9.h3 (9.Ng3 Bg4 10.f3 Bf5+=) 9...h5 (9...0-0 10.Ng3+=) 10.g3 (10.e4 Bg6=) 10...Nbd7 11.Bg2 Nb6 (11...0-0 12.e4 de4 13.de4=) 12.a4 (12.e4 de4 13.de4 Bg6+=) 12...Rd8 (12...0-0-0 13.0-0+=) 13.Bc3 (13.0-0 0-0=) 13...Nc8 (13...c4 14.Nd4 Bg6 15.Ba5 cd3 16.cd3 Bd3 17.Rc1+/–) 14.Qb1 (14.Nb3 b6=) 14...b6 15.Qb2 Nd6 16.Nf3 (16.0-0 c4 17.Nd4 h4+=) 16...c4 17.Ne5 (better is 17.Ned4=) 17...Nd7?? (better is 17...h4!?+=) 18.Nd7 (18.Nc6 Nf6 19.Nd8 Qd8+/–) 18...Kd7 19.Bg7 cd3 (19...Rhg8!?+=) 20.cd3 Bd3?? 21.Bh8+- Nc4 22.Qb3 Be2 23.Bd4 e5 24.Ke2 ed4 25.Bd5 d3 26.Qd3 Ne5 27.Qf5 Ke8 28.Rac1 (28.Rac1 Qd6 29.Rhd1+-) 1–0. Rewitz,Poul (2235) – Lassen,Hans Joergen, DEN–chT, 1989.

5.Nd2 a6 6.Ngf3= c5 7.bc5 Bc5 8.e3 Nbd7 (8...0-0 9.Be2=) 9.Be2 Qc7 (9...Bg4 10.h3 Bf3 11.Nf3=) 10.c4 (10.Nh4 0-0=) 10...dc4 11.Nc4 b5 12.Nce5 (12.Ncd2 0-0=) 12...Ne5 13.Be5 Qe7 14.Qb3 (14.0-0 0-0=) 14...Bd6 15.Bd6 Qd6 16.Qb2 (better is 16.e4 Bg6 17.Qb4=) 16...0-0 (better is 16...Bg4!?=) 17.e4+/– Ne4 18.de4 Be4 19.0-0 Rac8 (19...Rfc8 20.Rfd1 Qf4 21.a4+/–) 20.Rac1 (20.Qb4 Qd5+/–) 20...Qf4 21.Rfd1 (21.Rc8 Rc8 22.Qd4 Qf5+/–) 21...h6 (21...Bd5 22.Rc8 Rc8 23.Ne5+/–) 22.Qd2 (22.Rc8 Rc8 23.Qb4 Qf5+/–) 22...Qf6 (22...Qd2 23.Nd2 (23.Rd2?? Rc1 24.Bf1 Ra1-+) 23...Bc2 24.Re1+/–) 23.Rc8 (23.Qb4 Rc1 24.Rc1 Bf3 25.Bf3 Rd8+-) 23...Rc8 24.Rc1 (24.Qe3 Bf3 25.Qf3 Qf3 26.Bf3 a5+/–) 24...Rd8 (24...Rc1 25.Qc1 Kh7 26.h3+/–) 25.Qc3 (25.Qe3 Qg6+/–) 25...Qf4 (25...Qc3 26.Rc3 g5 27.Kf1+/–) 26.Rd1 Rd1 27.Bd1 Bb7 28.Qd2 (28.Be2 Be4+/–) 28...Qf6 29.Qd4 Qd4 30.Nd4 g5 31.g3 (31.Kf1 Kf8+/–) 31...e5 (31...Kg7!?+/–) 32.Nf5+- Kh7 33.Bc2 Ba8 34.Kf1 Kg6 35.Ke2 e4 36.g4+- h5 37.h3 hg4 38.hg4 Kf6 39.Ke3 Ke5 40.Ng3 f6 41.Be4 Be4 42.Ne4 a5 43.f3 b4 44.ab4 ab4 45.Nd2 f5 46.gf5 Kf5 47.Nb3 Ke5 48.Nd4 Kd5 49.Kd3 Ke5+= 50.Ne2 Kd5 (better is 50...b3!?+=) ½–½. Longorio Yepiz,Filiberto – Ham Rodriguez,Carlos, Pan American–ch Amateur, 2001.

5.Nd2 Bd6 6.g3 0-0 7.Bg2 Bg6 8.f4 (8.c4 a5=) 8...Re8 (8...c5 9.e4 Bh5 10.Bf6 Qf6 11.Bf3 Bf3 12.Ngf3=+) 9.Ngf3 Nbd7 (9...Ng4 10.Bd4=+) 10.0-0= c6 11.Nh4 (11.c4 c5=) 11...e5 (11...Qb6 12.d4 Bh5 13.c4=+) 12.f5 (better 12.Ng6 fg6 13.e4=) 12...Bh5-/+ 13.Qe1 e4 (13...Qb6 14.e3 a5 15.Rb1 ab4 16.ab4-/+) 14.de4=+ Ne4 (14...a5!? 15.ba5 Qa5-/+ (15...de4?! 16.Nc4 Bc5 17.Kh1=)) 15.Ne4= de4 16.Rd1 Qc7 17.h3 (17.Qd2!? Be5 18.Qd7 Qd7 19.Rd7 Bb2 20.Rb7 Ba3 21.Rf4 Be2 22.Re4 (worse 22.Be4 Bc1 23.Bc6 Bf4 24.gf4 Rec8-/+) 22...Re4 23.Be4=) 17...Bg3 18.Rd7 Qb6 (18...Be1 19.Rc7 Bg3 20.Rb7 Be2 21.Ng6 hg6 22.fg6=+) 19.Bd4 Be1 20.Bb6 Bh4 21.Bf2 (21.Bd4 e3 22.Bf3 Rad8 23.Rd8 Rd8 24.Be3 Bf3 25.Rf3 a6=) 21...Bf2-/+ (21...Be2?! 22.Bh4 Bf1 23.Kf1+=) 22.Kf2 Rad8 (better 22...e3 23.Ke1 Rad8 24.Rd8 Rd8-/+) 23.Rfd1 Rd7 24.Rd7 g6 (24...e3 25.Ke1 Rb8 26.Re7=) 25.f6 g5? (25...e3!? 26.Ke1 Rb8+=) 26.Ke3 (26.Rb7 e3 27.Kg3 h6+-) 26...Bg6 (26...Rb8!?+/-) 27.Rb7+- h5 (27...h6 28.Ra7 Re6 29.Ra6 Rf6 30.b5+- (30.Be4 Re6-/+)) 28.Ra7 Re6 29.Re7 (29.Ra5!? g4+-) 29...Rf6 30.a4 (30.Re5 g4 31.hg4 hg4+-) 30...g4? (better 30...Rd6+=) 31.hg4 (31.Be4 Be4 32.hg4 Bc2=+) 31...hg4 32.a5 Re6?? (32...Rd6+-) 33.Re6 fe6 34.a6 1-0. black_bishop_88 (2695) - UMRAN1453 (2020), Hourly SuperBlitz Arena, lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.d3 e6 5.Nd2)

5.Nd2 Nbd7 6.c4 +=.

5.Nd2 Be7 6.g3 0-0 7.Ngf3 c6 8.Nh4 Bg6 9.Ng6 fg6 10.Bh3 Kh8 (10...Qd7 11.Nf3 Na6 12.e4=) 11.Be6+= Nbd7 (11...c5 12.bc5 Bc5 13.e3+=) 12.0-0 Bd6 13.c4 Ne5 (13...Qe7!? 14.Bh3 Be5+/-) 14.cd5 cd5 15.Bh3 (better 15.Qb3+-) 15...Nfg4? (15...a5 16.b5+/-) 16.Bg2?? (better 16.d4+-) 16...Qg5 17.Nf3 Nf3 18.ef3 Nh6 (18...Nf6!?+-) 19.f4 Qe7 20.Bd5 a5 21.Re1 Qc7 22.Rc1 Qb6 23.Re6 Ng4 (23...ab4 24.Rc6! bc6 25.Bg7 Kg8 26.Rd6 cd5 27.Rb6 Kg7 28.Qa1 Kg8 29.Rb4 Nf7+-) 24.Qg4 (24.Qg4 Rf5 25.Rg6 hg6 26.Qg6 Bf8 27.Qf5 Qg6 28.Qg6 Ra6 29.Qh5 Rh6 30.Qh6) 1-0. black_bishop_88 (2625) - laq1410 (2170), Quarantε³ne-Liga 3C Team Battle, lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.d3 e6 5.Nd2)

5.Nd2 g6 6.Ngf3 Nbd7 (6...Rg8 7.h3 g5 8.g4+=) 7.g3 (7.h3 e5+=) 7...Bg7 (7...Bd6 8.e4 Bg4 9.Qe2=) 8.Bg2 (8.h3 e5+=) 8...0-0 (8...a5 9.0-0=) 9.0-0 (9.h3 h5+=) 9...c6 (9...Nb6 10.h3+=) 10.Qe1 (10.h3 h5+=) 10...Bg4 11.h3 Bf3 12.ef3 (12.Nf3 Qc7=) 12...Qc7 13.f4 Nh5 (13...a5 14.c4=+) 14.Bg7= Kg7 15.Nf3 Nf4 (better 15...Nhf6=) 16.gf4+/- Qf4 17.Qe3 Qc7 18.d4 Nf6 19.Ne5 Nh5 20.Rae1 Kg8 21.Ng4 Qe7 (21...a5 22.Ra1+/-) 22.Qh6 (22.Qe5 Ng7+-) 22...Qh4 (22...a5 23.c3+/-) 23.Re5 (23.f4 Qd8+-) 23...f5+/- 24.Nh2 Rae8 (better 24...Qf4!? 25.Qf4 Nf4+/-) 25.Nf3+- Qf6 26.Ng5 (26.Rfe1 Qg7 27.Qe3 Qd7+-) 26...Re7 (better 26...Qg7 27.Qg7 Ng7+-) 27.Re6 Qg7 28.Qg7 Rg7 29.f4?? (better 29.Re5 Nf4 30.Rfe1+-) 29...h6+/- 30.Bf3?? (better 30.Nf3 Nf4 31.Re5+/-) 30...hg5 (30...Nf4 31.Bd5 Nd5 32.Nf3-+) 31.fg5 (better 31.Bh5 gh5 32.Rh6-/+) 31...Kf7?? (better 31...Nf4 32.Bd5 Nd5-+) 32.Rfe1+= Kg8 (32...Nf4 33.Rf6 Kg8 34.Kh2+=) 33.Re7 (better 33.Bh5!? gh5 34.h4+/-) 33...Re7 (33...Ng3!?=) 34.Re7+= (34.Re7 Nf4 35.Rb7 Nh3 36.Kg2 Ng5 37.Ra7=) 1-0. black_bishop_88 (2655) - Misha9521 (2040), Pirates Private Cup, lichess.org, 2020. (=1.a3 d5 2.b4 Bf5 3.Bb2 Nf6 4.d3 e6 5.Nd2)

5.Nd2 h6 6.Ngf3 Bh7 7.e3 Be7 8.Be2 0-0 9.0-0 c6 10.Ne5 a5 11.c3 Nbd7 12.f4 Ne5 (12...Qb6 13.Rf3=+) 13.fe5= Nd7 14.d4 b6 (14...Bf5 15.Nf3=+) 15.Bf3 (15.b5 c5=) 15...c5 (15...ab4 16.cb4 Bd3 17.Rf2=) 16.b5 (16.e4 cd4 17.cd4 de4 18.Ne4 ab4=+) 16...Bd3 Black plans c4 17.Be2 Be2 18.Qe2 f5 (18...Rc8 19.c4=) 19.a4 c4 20.Kh1 Qe8 21.Ba3 Ba3 22.Ra3 Qe7 23.Raa1 Rf7 24.Rf3 Raf8 25.Raf1 (25.Qf2 Re8+=) 25...Kh7 (25...Qa3 26.Nc4 dc4 27.Qc4=) 26.Rf4 (26.Qf2 Kg8+=) 26...g5 (26...Qa3 27.e4 Qa4 28.ed5 ed5 29.Rb1=+) 27.R4f2 Qa3 28.g4 (better 28.e4!? Qc3 29.ed5 ed5 30.Qd1=) 28...Qc3-/+ (28...Qa4?! 29.e4 de4 30.Ne4 Qb5 31.Nd6 Qc6 32.Kg1+=) 29.gf5 Rf5 (worse 29...ef5 30.e6 Re7 31.ed7 Rd7 32.Nf3+-) 30.Rf5 Rf5 (30...ef5?! 31.e6 Nf6 32.e7=) 31.Rf5 ef5 32.Qh5?? (32.Nf1 Ne5 33.de5 Qe5-/+) 32...Kg7 (32...Qc1 33.Kg2 Qd2 34.Kh1 Qc1 35.Kg2 Qb2 36.Kf1 Qb1 37.Kf2 Qc2 38.Kf1 Qd3 39.Kf2 Qd2 40.Kf1-+) 33.e6?? (better 33.Nf1 Qa1 34.Kg1 Ne5 35.de5 Qe5 36.Qe2-/+) 33...Qc1-+ (33...Qd2 34.Qf7 Kh8 35.Qe8 Kh7 36.Qd7 Kh8 37.Qe8 Kg7 38.Qe7 Kg8 39.Qf7 Kh8 40.Qf8 Kh7 41.Qf5 Kg7 42.Qf7 Kh8 43.e7 Qd1 44.Kg2 Qg4 45.Kf2 Qh4 46.Ke2 Qh2 47.Ke1 Qh4 48.Qf2 Qh1 49.Qf1 Qh4 50.Kd2+-) 34.Kg2 Qd2 35.Kh1 Qe1 36.Kg2 Qd2 (36...Qe3 37.Qf7 Kh8 38.Qe8 Kh7 39.Qd7 Kh8 40.Qe8 Kg7 41.Qf7 Kh8 42.Qf8 Kh7 43.Qf5 Kg7 44.Qf7 Kh8 45.Qe8 Kg7 46.Qd7 Kh8 47.Qd5 Qd2 48.Kh3=) 37.Kh1 Qc1 38.Kg2 Qc2 39.Kg1 Qb1 40.Kf2 Qc2 (better 40...Qb2!? 41.Kf1 Qa1 42.Kg2-+) 41.Kg1-/+ Qb1 42.Kf2 Qc2?? (42...Qb2 43.Kf1 Qa1 44.Kg2 Ne5-+ (44...Qa4 45.Qf7 Kh8 46.ed7 Qa2 47.Kg3 f4 48.Kg4 h5 49.Kf5 Qc2 50.Kf6 Qg6 51.Qg6 fe3 52.d8Q)) 43.Kg1= ½-½. blitzbullet (2580) - Shprot86 (2780), Rated Bullet game, lichess.org, 2018.

5.Nd2 h6 6.g3 a5 7.b5 Nbd7 8.Bg2 Be7 9.e4 Bh7 10.Ne2 de4 11.Ne4 Ne4 12.Be4 (12.de4 Bf6 13.Qc1 Qe7=) 12...Be4 13.de4 Bf6 14.Bf6 Qf6 15.0-0 Ne5 (15...Qf3!?=+) 16.f4= Nc4 17.e5 (17.Qd3 Nb6+=) 17...Qg6 (17...Qe7 18.Rf3 Rd8 19.Nd4=+) 18.Qd4 (18.Rf3 Rd8 19.Rd3 Ke7=) 18...Nb6 (18...Qc2 19.Nc3 Nb6 20.Qc5=+) 19.Qc5 0-0-0 20.Rad1 h5 21.Nd4 (21.h3 Qe4 22.Kf2 a4=) 21...h4=+ 22.Qc3 hg3 23.Qg3 Qg3 (23...Qh6 24.Rf2=+) 24.hg3 Nc4 25.Rd3 Rd5 26.a4 (26.Re1!?=+) 26...Nb2-+ 27.Rd2 (27.Rb3 Na4 28.Nf3 Nb6-+) 27...Na4 (better 27...Rhd8!? 28.c3 Na4-+) 28.Ra1-/+ Nb6 29.Nb3 Rd2 30.Nd2 a4 31.c4 Rd8 32.c5 Rd2 33.cb6 Rd4 34.Rc1 c6! 35.bc6 bc6 36.Rc6 Kb7 37.Rc7 Kb6 38.Rc3 Rd7 39.Kf2 Kb5 40.Kf3 Kb4 41.Rc8 Ra7 42.Rb8 Kc3 43.Rc8 Kd4 44.Rd8 Kc5 45.Rc8 Kb6 46.Rb8 Kc7 (46...Ka5 47.Ke4 a3 48.Rb1-+) 47.Rb1 a3 48.Ke3 a2 49.Ra1 Kc6 50.Kd4 Ra4 51.Kc3 Kd5 52.Kb3 Ra8 53.Kb4 (53.Kb2 Ke4 54.Re1 Kf3-+) 53...Ke4 54.Kc5 Kf3 55.Kd6 (55.Kd4 Kg3 56.Ke3 Ra3 57.Ke4 Kf2-+) 55...Kg3 56.Ke7 Ra7 57.Kf8 Kf4 58.Kg7 Ke5 59.Re1 Kd4 60.Kf6 Kc3 0-1. black_bishop_88 (2695) - Leonid_Starozhilov (2575), lichess.org, 2020. (=1.a3 d5 2.b4 Bf5 3.Bb2 e6 4.d3 Nf6 5.Nd2)

5.Nd2 h6 6.g3 c6 7.Bg2 a5 8.e4 Bg4 9.f3 Bh5 10.c3 Nbd7 11.Ne2 (11.Nh3 e5=+) 11...Ne5 12.Nf4 g5 13.d4 (better 13.Nh5 Nd3 14.Ke2 Nb2 15.Nf6 Qf6 16.Qb3-/+) 13...Ned7 (better 13...Ne4 14.de5 gf4-/+) 14.Nh5+= Nh5 15.f4 Ng7 16.0-0 White prepares f5 16...Be7 (16...gf4 17.Rf4 Rg8 18.b5+=) 17.f5+/- de4 (17...0-0 18.Qe2+/-) 18.fe6 Ne6 19.Ne4 ab4 20.ab4 Ra1 21.Ba1 Nf6? (21...h5 22.c4 Rh6 23.Qf3+-) 22.Bb2 (better 22.Nf6!? Bf6 23.Qf3+-) 22...Ne4 23.Be4 0-0 24.Qh5 Kg7 25.Bc1 (25.Qf3 Bf6+-) 25...Bf6 (25...Bb4 26.Qf3 f5 27.Bf5+/-) 26.Qg4 Re8 27.Bc2 (27.Qf3 Nf8+/-) 27...Nd4+= 28.cd4 Qd4 29.Qd4 Bd4 30.Kh1 Re2 (30...Bc3 31.Bb3 f6 32.b5+=) 31.Bb3 (31.Bd3 Re8+/-) 31...f6 32.Bc4 Rc2 33.Bd3 Rc3 (33...Ra2 34.Bb1 Ra1 35.Bd2+/-) 34.Bf5 (34.Rd1 b6+-) 34...Rb3 35.Bd2 Rb2 (35...b6 36.Rd1+/-) 36.Rd1 Be5 37.Be3 Rb4 38.Rd7 Kg8 39.Be6 (better 39.Bc5!? Rb5 40.Be6 Kh8 41.Bf8+-) 39...Kh8+= 40.Bc5 Rb1 41.Kg2 Rb2 42.Kh3 (better 42.Kf3!? Rh2 43.Kg4+- (43.Rb7?! h5+-)) 42...h5= 43.Bf8 (better 43.Bg1=) 43...g4-/+ 44.Bg4 hg4 45.Kg4 Rh2 46.Kf5 (46.Rb7 Rg2-/+) 46…Kg8-+ (46...Kg8 47.Be7 Rh7-+ (47...Bg3 48.Kg6 Bc7 49.Rc7 Rg2 50.Kf6+/-); 46...Bg3 47.Kg6 Bc7 48.Bg7 Kg8 49.Rc7 Rg2 50.Kf6+/-) 0-1. Schmidt,Ha (2350) - Dowgird,F (2345), Titled Tuesday 4th May, 2021. (=1.a3 A00: Irregular Openings 1...d5 2.b4 Bf5 3.Bb2 e6 4.d3 Nf6 5.Nd2)

5.Nf3 h6 6.h3 Bd6 7.Nbd2 0-0 8.e3 Nbd7 9.c4 c5 10.b5 Rc8 (10...a6 11.ba6 Ra6 12.Be2=+) 11.Be2= Bb8 (11...Qb6 12.0-0=) 12.Bc3 (12.0-0 dc4 13.Nc4 Nb6+=) 12...Bh7 (12...e5 13.0-0=) 13.a4 Qc7 14.a5 b6 (14...e5 15.cd5 Nd5 16.Bb2=) 15.a6 (15.0-0 e5 16.cd5 Nd5=) 15...dc4 16.dc4 (16.Nc4 Nd5 17.Bb2 Rfd8+=) 16...Rfd8 17.Qc1 e5 18.Qb2 e4 19.Nh2 Qd6 20.Rd1 Qe7 21.Ng4 Re8 (21...Ng4 22.hg4 Be5 23.Rh5=) 22.Nf6+= Nf6 Black gets strong initiative 23.0-0 (23.h4 Red8=) 23...Qd6 Threatening mate... how? 24.f4 (24.g3 Qe6=) 24...ef3= 25.Nf3 (worse 25.Rf3 Qh2 26.Kf2 Ne4 27.Ne4 Be4-+) 25...Qe6 26.Bd2 (26.Bf6!? Qe3 27.Kh1 gf6 28.Rd2=+) 26...Ne4-/+ 27.Bc1 (27.Qb3 Ng3 28.Rfe1 Be4-/+) 27...Ng3 28.Rf2 Ne2 (28...Rcd8 29.Rd8 Rd8 30.Qb3-/+) 29.Qe2 f6 30.Qf1 (30.Rff1 Rcd8-/+) 30...Be4 (30...Rcd8 31.Rd8 Rd8 32.Rd2 Qe3 33.Qf2-/+) 31.Qe2 (31.Rfd2 Bf3 32.gf3 Qe3 33.Rf2 Qe6-/+) 31...g5 (31...Rcd8 32.Rd2-/+) 32.Nd2 (32.Bb2 Bg3 33.Rff1 Rcd8=) 32...Ba8 (32...Bc2 33.g4 Bd1 34.Qd1 Qe3-+) 33.Nf1 Rcd8 34.Rd8 White gets kings attack 34...Rd8 35.Bb2 Attacks the backward pawn on f6 35...f5 36.Qc2 Rf8 37.Qc3 Do you see the mate threat? 37...Kf7 38.Qg7 Ke8 39.Qc3 (39.Rd2 Be4 40.Rd8 Kd8 41.Qf8 Qe8 42.Bf6 Kd7 43.Qh6+-) 39...h5 40.Rd2 (better 40.Qg7 g4 41.Qg5 gh3 42.Qh5 Kd8 43.Qh3=) 40...h4 (better 40...g4 41.Qg7 Rg8=) 41.Qg7+- Qe7 (41...Be4!? 42.Qg5 Bc7 43.Qh4 Rf7+-) 42.Qg6+- Rf7 (better 42...Qf7 43.Qg5 Bc7+-) 43.Bg7 Bc7 (43...Be4 44.Bh6 Bc7 45.Qg8 Rf8 46.Bf8 Qf8 47.Qg6 Qf7 48.Qf7 Kf7 49.Rd7 Ke8 50.Rc7 Kd8 51.Ra7 Kc8+-) 44.Bh6 Bd8 (44...Be4 45.Qg8 Rf8 46.Bf8 Qf8 47.Qg6 Qf7 48.Qf7 Kf7 49.Rd7 Ke8 50.Rc7 Kd8 51.Ra7 Kc8+-) 45.Qg8 Rf8 46.Rd8! Qd8 Deflection from f8 (46...Kd8 Theme: Deflection from f8 47.Bf8) 47.Qf8 Kd7 48.Qd8 Kd8 49.Bg5 Kd7 50.Bh4 Be4 51.Nd2 Bd3 (51...Bc2 52.g4 fg4 53.hg4+-) 52.Bg5 (52.Kf2 Kc8 53.Bg3 Bc2+-) 52...Kc8 (52...Bc2 53.h4 Bd1 54.Nf3+-) 53.Bf4 (53.Kf2!? Bc2+-) 53...Be2 54.Kf2 Bc4 (54...Bh5+-) 55.Nc4 (55.Nc4 Kd7 56.Nb6 Ke6 57.Nc4+-) 1–0. petrobbo (1990) – Fingers420 (2025), ChessWorld.net, 2018.

5.g3 Be7 6.Bg2 (6.Bh3 Bh3 7.Nh3 a5 8.b5 0-0 9.Nd2 c6 10.bc6 Nc6 11.0-0; 6.Nf3 0-0 7.Bg2 c5 8.0-0 cb4 9.ab4 Bb4 10.Nh4 Bg4 11.h3; 6.Nc3 d4 7.Ne4 Nc6 8.Bg2 0-0 9.Nf6 Bf6 10.Nf3 h5 11.b5; 6.Nd2 0-0 7.Ngf3 c5 8.bc5 Bc5 9.Nb3 Qb6 10.Bd4 Bd4 11.Nbd4) 6...0-0 (6...c5 7.Nf3 cb4 8.Nd4 Nc6 9.Nf5 ef5 10.0-0 0-0 11.ab4) 7.Nd2 (7.Nf3 c5 8.0-0 cb4 9.ab4 Bb4 10.Nd4 Nc6 11.Nf5) 7...h6 (7...c5 8.Ngf3 cb4 9.ab4 Bb4 10.Nh4 Nc6 11.Nf5) 8.c4 (8.e4 de4 9.de4 Bg4 10.Ne2 a5 11.f3) 8...c6 (8...c5 9.bc5 Nc6 10.Ngf3 Bc5 11.0-0) 9.Ngf3 Nbd7 (9...a5 10.Nd4 dc4 11.Nc4) 10.0-0 Bh7 (10...a5 11.Qb3) 11.Re1 (11.Qb3=) 11...a5 12.Qb3 ab4 13.ab4 Qb6 14.c5 Qc7 15.Rac1 b6 16.cb6 ½–½. Tristan,L (2390) – Ruperez,M (2110), 2nd Bolivar Open, Buenos Aires ARG, 2009. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

5.h3 h6 6.Nf3 Be7 7.e3 0-0 8.Be2 Nbd7 9.0-0 c5 10.c3 (10.bc5 Bc5 11.Nbd2 Rc8=) 10...Rc8 11.Nbd2 Qc7 12.bc5 Nc5 13.d4 (13.Qc2 e5+=) 13...Ncd7 (13...Nd3!? 14.Ra2 Nb2 15.Rb2 Ba3-/+) 14.c4+= dc4 15.Nc4 Be4 16.Rc1 Qd8 17.Nce5 Ne5 18.de5 Nd7 19.Ne1 (19.Rc8!? Qc8 20.Qa4+=) 19...Nb6 20.Bf3 Rc1 21.Qc1 Bd5 22.Bd5 Qd5 23.Nf3 Qa2 Attacking the isolated pawn on a3 24.Qd2 (24.Bd4 Rc8 25.Qb1 Qa3 26.Bb6 ab6 27.Qb6 Qa6=) 24...Rd8 25.Qc2?? (25.Bd4 Qa3 26.Rb1 Qa6+=) 25...Na4 (better is 25...Ba3!? 26.Qc7 Rc8 27.Qb7 Bb2 28.e4-+) 26.Rb1?? (26.Qc7 Qb2 27.Qe7 Rf8=) 26...Re8?? (better is 26...Rd5 27.Ne1 Rc5-+) 27.Nd4 Nb2 28.Qb2 Qb2= 29.Rb2 Ba3 30.Rb7 Bc5 31.f4 ½–½. Sapareva,Magdalena – Atanasov,Stoyan (1900), BUL–ch Seniors, 2009.

6.b5 Qa5 7.c4 Nbd7 8.Qb3 d4 (8...Bd6 9.g3=+) 9.g3 (9.e3 e5=+) 9...Bd6 (9...Ne5 10.Bg2 0-0-0 11.Nh3=+) 10.Bg2= Qc7 (10...0-0-0 11.Ngf3=+) 11.Ngf3 0-0 12.0-0 (12.Nh4 Rfe8=) 12...h6 (12...a6 13.a4=) 13.e3 e5 14.e4 (14.a4 a6=) 14...Bh7 (14...Be6 15.Rfb1=+) 15.a4 a5 (15...Qa5 16.Qc2=) 16.Nh4 b6 (16...Qb6 17.Bh3=) 17.Rae1 ½–½. Zharov,Dmitry (2330) – Logashov,Sergey Y, Moscow Jan, 2007.

6.b5 Bd6 7.e4 Bg4 8.Be2 Be2 9.Ne2 =.

6.b5 Nbd7 7.c4 Be7 8.Ngf3 h6 (8...0-0 9.Nh4=+) 9.a4 (9.cd5 ed5 10.e4 Be6=+) 9...0-0 10.a5 d4 11.g3 e5 12.Bg2 Bh7 13.0-0 Rc8 14.Ne1 Qc7 15.a6 b6 16.Bb7 Rfe8? (better 16...Rcd8!?=) 17.Bc8+/- Qc8 18.f3 e4? (better 18...Qc7!?+/-) 19.fe4+- Ne5 20.Ndf3 Nfg4 21.Ne5 Ne5 22.Nf3 Ng4 23.Bc1 Bd6 24.Kg2 (24.Nh4 Qe6+-) 24...g5 (24...f5 25.ef5 Bf5+-) 25.h3 Ne3 26.Be3 de3 27.g4 Bf4 28.Nh4! Re4? (28...gh4 29.Rf4 Discovered attack (29.Rf4 Deflection)) 29.de4 Be4 30.Nf3 h5 31.Ra3 (better 31.Rh1 hg4 32.hg4+-) 31...hg4+/- 32.Rd3 (32.Rb3+/-) 32...gh3? (better 32...gf3 33.ef3 Bd3 34.Qd3 Qe6+=) 33.Kh1+- Qg4 (33...Bd3 34.Qd3 (34.ed3?! Qa8=) 34...g4 35.Nh4 Qa8 36.Qd5 Qd5 37.cd5+-) 34.Rd8 Kh7 35.Rg1 Qh5 (35...Qe6 36.Qd7 h2+/-) 36.Re8 Bg6 (36...h2 37.Rf1 Qg6+-) 37.Qd8 Be5 38.Re5 (38.Re5 Kg7 39.Re8 Qh8 40.Rh8 h2 41.Rg8 Kh7 42.Rg2 Bh5 43.Ng5 Kh6 44.Qf8) 1-0. black_bishop_88 (2660) - Matou_33 (2485), lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.d3 e6 5.Nd2)

6.b5 Be7 7.e4 Bg6 +=.

6.b5 Be7 7.Ngf3 0-0 8.g3 (8.e3 a6+=) 8...Qb6 (8...a6 9.ba6 Na6 10.Bg2-/+) 9.a4 a6 Black gets strong initiative 10.c4 Qa5 (10...ab5 11.ab5 Nbd7 12.Bg2+=) 11.Bg2 dc4 12.dc4 Rd8 13.0-0 Ne4 14.Bc1 (14.Nb3 Qb4 (14...Rd1?! 15.Na5 Rd7 16.b6=) 15.Qc2 Ng3-+) 14...ab5-/+ 15.cb5 Bf6 16.Ra3 (16.Ra2 Nc3 17.Qb3 Na2 18.Qa2 Qa4 19.Qa4 Ra4-+) 16...Bc3 17.Ra2 Bb4 (better is 17...c4-/+) 18.Qb3? (18.h3 Nc3 19.Qb3 Ne2 20.Kh2 Nc1 21.Rc1 Bd2 (worse is 21...Rd2 22.Nd2 Bd2 23.Rd1-+) 22.Nd2 Rd2 23.Bb7 Ra7 24.Rc5 Rd8-+ (24...Rb7 25.Rd2 e5 26.Qc3+-)) 18...Nc3?? (better is 18...Bd2 19.Rd2 Rd2 (worse is 19...Nd2 20.Bd2 Qa4 21.Qb2-+) 20.Bd2 Nd2 21.Nd2 Qd2-+) 19.Nc4-/+ Qc7 (19...Qa7 20.Bg5 f6+=) 20.Bf4 Qe7 21.Rb2 Nd7 (21...Ra4 22.Be5 Ne2 23.Re2 Bd3 24.Qa4 Be2+-) 22.Ra1 Nb5 (22...Nf6!?+=) 23.Rc1 Na7 (23...e5 24.Nce5 Ne5 25.Be5 Be6=) 24.Bd6 (better is 24.Nd4! cd4 25.Qb4 Qb4 26.Rb4+=) 24...Qf6+= 25.Nfe5 (25.Nh4 Nc6+=) 25...Ne5-/+ 26.Be5 Qe7 (26...Qh6!? 27.Bf4 g5=) 27.Nb6= f6 (27...Nc6 28.Bc6 Ra6 29.Bb7 Qb7-/+) 28.Na8+/– Ra8 (28...fe5!? 29.Nb6 Qg5+/–) 29.Bc3+- Nc6 30.Bc6 bc6 31.Bb4 cb4 32.Qb4 Qd7 33.Ra2 Qd5 34.Qc4 Ra5? 35.Qd5 cd5 36.Rc8 Kf7 37.Rb8 d4 38.Rb5 Ra7 39.f3 e5 40.a5 Ke7 41.Rb8 Kd6 42.Kf2 Kc5 43.Ra1 Kd5 44.h4 Bd7 45.Rb6 White prepares the advance a6 45...f5 46.a6 White threatens Rb7 46...Bc8? 47.Ra5 Kc4 48.Re5 Ra6 49.Ra6 Ba6 50.Rf5 Kc3 51.Rf7 Bb5 52.Rg7 Kd2 53.Re7 (53.Re7 Bc4 54.Rd7+-; 53.Rb7 Bc4+-) 1–0. Valenta,Vit – Jancalek,Petr, Morava–ch U20, 1992.

6.b5 Be7 7.g3 Nbd7 (7...0-0 8.Bg2=+) 8.Bg2 Qb6 (8...0-0 9.c4=+) 9.a4 (9.c4 0-0=+) 9...0-0 (9...Qa5 10.Ngf3=+) 10.Ngf3 Rac8 (10...a6 11.c4=+) 11.c4= d4 12.0-0 (12.a5 Qc7=) 12...Rfe8 (12...e5 13.a5 Qc7 14.h3=) 13.a5 (13.Nh4 Rb8+=) 13...Qc7 14.a6 b6 15.Qb3 (15.Nh4 h6+=) 15...h6 (15...e5 16.e4 Be6 17.h3=) 16.Rfe1 (16.Rae1 e5=) 16...Bd6 (16...e5 17.Qc2=) 17.e4 Bh7 18.Re2 (18.h3 Rcd8=) 18...e5 (18...Bg6 19.Rae1 e5 20.Nh4=) 19.h4 (19.Bc1 Bg6=) 19...Nh5 (19...Rcd8 20.Rae1=) 20.Bh3 (20.Rae1 Rcd8=) 20...Rf8 (20...Rcd8 21.Rae1=) 21.Bg4 (21.Rae1 Bg6=) 21...Nhf6 (21...Bg6 22.Bh3=) 22.Bh3 Ne8 (22...Bg6 23.Rae1=) 23.g4 g6 (23...Rd8 24.g5=) 24.Nf1 (24.Bc1 Ng7+=) 24...f5 25.g5 hg5 (25...fe4 26.de4 h5 27.Qd3=) 26.Ng5+= Ng7 27.Nh7 (27.ef5!? gf5 28.Ng3+=) 27...Kh7=+ 28.Nh2 Qd8 (28...fe4!? 29.Re4 Rce8=+) 29.Nf3= Be7 30.Kh2 (30.Kg2 Bh4 31.ef5 gf5+=) 30...Bh4 (30...Nh5 31.Bc1 fe4 32.Ng5 Bg5 33.Bg5=) 31.Rg1 (31.Rh1 Nh5 32.Bc1 fe4 33.de4 Bf6=) 31...Nh5 (31...Ne6 32.Bc1 fe4 33.de4=+) 32.Bc1= f4?? (better 32...fe4 33.Bg5 Bg5 34.Ng5 Kh8=+) 33.Bd7+- Qd7 34.Nh4 f3 (34...Rh8 35.Rg5 (35.Rg6 Rcg8 36.Rg2 Rg2 37.Ng2 f3-+) 35...Qe7 36.Nf3+-) 35.Ree1 Rf6? (35...Nf4 36.Rg3 Ne2 37.Ng6 (37.Rg6?! Nc1 38.Qd1 Ne2+=) 37...Ng3 38.Nf8 Rf8 39.fg3-+) 36.Rg5 (36.Bg5!? Rf7 37.Bd2 Rf6+-) 36...Nf4 37.Bf4?? (37.Rg3 Ne2 38.Rh3+- (38.Rf3 Rf3 39.Re2 Qh3 40.Kg1 Qh4 41.Bg5 Qg5 42.Kf1 Rcf8 43.Ra2 Qh4 44.Kg1 Rf2 45.Rf2 Rf2 46.Qc2 Qh2)) 37...ef4?? (better 37...Rf4 38.Kg3 Qe7=) 38.Nf3 (38.Reg1 Qg7+-) 38...Rh8 39.Kg2 Kg7 40.Kf1 Rh3 (40...Kf8 41.Ke2+-) 41.Ke2 Kh6 (41...Qe7 42.Reg1+-) 42.Reg1 Kg7 (42...Rh5 43.R5g4+-) 43.Ne5 Qd6 (43...f3 44.Kd2 Qe8 45.Ng6+-) 44.Ng6 f3 (44...Kh7+-) 45.Ke1 (better 45.Kd2 Rg6 46.Rg6 Qg6 47.Qd1+-) 45...Rg6 46.Rg6 Qg6 47.Rg6 Kg6 48.Kd2 Rh1 49.Qd1! Rd1 50.Kd1 ½–½. Santana,Expedito (1690) – Dalanhol,Joao Vitor (1870), Curitiba BRA, Open, 2014.

6.c3 Nc6 7.Ngf3 Bd6 8.e3 0-0 9.Be2 Qc7 (9...h6 10.0-0=+) 10.0-0 h6 (10...e5 11.bc5 Bc5 12.c4=) 11.Rc1=+ Qb6 (11...b6 12.b5 Ne5 13.Ne5 Be5 14.Nf3=+) 12.d4 (12.Qa4 Rfe8=+) 12...cb4 (12...c4!?-/+) 13.cb4=+ a5 (better 13...Rac8=+) 14.ba5?? (better 14.b5=) 14...Qb2-+ 15.h3 (15.a6 Ba3 16.Qa4 Rfb8-+ (16...Qc1?! 17.Rc1 Bc1 18.Nf1-+)) 15...Ra5 (better 15...Na5 16.a4-+) 16.Nh2 (16.a4 Ba3 17.Bb5 Qc1 18.Qc1 Bc1 19.Rc1 Rc8-+) 16...Bh2 (better 16...Ra3!? 17.Nb1 Raa8 18.Nf3-+) 17.Kh2 Ne4 (better 17...Ra3 18.Nb1 Rb3 19.Nd2-+) 18.Ne4 Be4 19.Bg4 (19.a4 e5 20.de5 Qe5 21.Kh1 d4-+) 19...Ra3 20.Bf3 (20.Qe2 Qb4 21.Rfd1 Rfa8-+) 20...Rd3 (better 20...Bd3!? 21.Rg1 Qf2 22.Qe1-+) 21.Qe1 (21.Qc2 Qa3 22.Be4 Qd6 23.Kg1 de4-+) 21...Bf3 22.gf3 Qd2 (22...e5 23.Rb1 Qa3 24.de5 Ne5 25.Qb4 Nf3 26.Kg2-+) 23.Qd2 (23.Kg2 Na5-+) 23…Rd2 0–1. Khvadagiani,Kristine – Nguyen,Thu An, World Cadets Championship G U8, 2016.

6.bc5 Bc5 7.e3 Nc6 8.Ngf3 h6 (8...0-0 9.Be2+=) 9.Be2= 0-0 10.0-0 Rc8 11.c4 dc4 12.Nc4 b5 13.Nce5 Ne5 14.Ne5 Nd7 15.Qb3 Bd6 16.Nd7 (16.Qb5? Ne5 17.Be5 Rc5-+) 16...Qd7 17.Rfc1 a6 18.e4 Bg6 19.g3 Qa7 20.a4 b4 21.a5 Bc5 22.Rf1 Rfd8 23.Rac1 Bd6 24.Kg2 Qb7 25.Rc8 Rc8 26.f4 Rc5 27.Ra1 Bc7 (27...Qc7!?-/+) 28.Bf3+= Qb8 (28...Ra5? 29.f5 Ra1 30.Ba1+-) 29.Bd4 Ra5 30.Ra5 Ba5 31.Qa4 (better is 31.Qb2!?=) 31...Qd8 32.Qa1 f6 33.e5 f5 (33...Bb6 34.Bb6 Qb6 35.ef6-/+) 34.Bf2 (34.Bg1 Qd3 35.Qa5 b3-/+) 34...b3-/+ 35.Qb1 Qb8 36.Qb2 (36.Bd1 Qb7 37.Kg1-+) 36...Be8-+ 37.d4 (37.Kg1 Qb4-+) 37...Bc3 38.Qb1 Qb5 Black prepares the advance b2 39.d5 ed5 40.Bd1 b2 41.Bc2 d4 42.Bf5 Bc6 43.Kh3 Qd5 44.Kh4 Bb4 (44...Bb4 45.g4 Qg2-+) 0–1. Protze,Gunter – Wuttke,Johannes, BdF, 2000.

6.bc5 Bc5+= 7.e3 Nbd7 8.Ngf3 0-0 9.Be2 h6 10.0-0 Rc8 11.c4 (11.Rb1 Qc7=) 11...Ng4 (11...dc4!? 12.Nc4 b5=) 12.Nd4 Bd4 (12...Qh4 13.N2f3 Qf6 14.cd5 ed5 15.Qb3 Bd4 16.Bd4+/–) 13.Bd4 Nge5 14.cd5 ed5 15.Ba7 (15.Qb3 Nc6 16.Qd5 Nde5 17.Qd8 Rfd8 18.Be5 Ne5+/–) 15...b6 16.Nf3 (16.e4 Be6 17.Qa4 de4 18.Ne4+= (worse is 18.Qe4 Nc6-+)) 16...Nc6-/+ 17.Bb6 Qb6 (17...Nb6 18.Qd2-/+) 18.Qd2 (18.d4 Rfe8-/+) 18...Rb8 (18...d4 19.Rfb1 Qa7 20.Rb5-/+) 19.Rfc1 (19.Nh4 Bh7-/+) 19...Rfc8 (19...d4 20.Qc2 Rfc8 21.ed4 Nd4 22.Qc8 Rc8 23.Rc8 Nf8 24.Re8-+) 20.h3 (20.a4 d4-/+) 20...Qb2 (20...Nc5 21.Qd1-/+) 21.Qb2 (21.Ra2 Qf6-/+) 21...Rb2 22.Bf1 (22.g4 Be6 23.Kf1 Kf8-/+) 22...Nde5 23.Ne5 Ne5 24.Rc8 Bc8 25.a4 Ba6 26.d4 Nc4 27.g3+= Kf8 28.Bg2 Bb7 29.a5 Rb5 30.a6= Ba8 31.Bf1 Ra5 32.Ra5 Na5 33.Bb5 Ke7 34.Kf1 Kd6 35.h4? Kc7-/+ 36.Ke2 Kb6-+ 37.Bd3 Nc4 38.Kd1 Nb2 39.Kd2 Nd3 40.Kd3 Ka6 41.Kc3 Kb5 42.Kd3 Kb4 43.Kc2 f5 44.Kb2 Bb7 45.Kc2 Ba6 46.Kd2 Kb3 47.f3 h5 48.Kd1 Kc3 (48...Kc3 49.Ke1 Kc2-+) 0–1. Fengsrud,Roy – Gross,Wilhelm, corr 3GMM–08, 1997.

6.e4 de4 7.Bf6 Qf6 8.de4 Bg6 9.Bb5 Nc6 +=.

6.e4!? Bg6 7.ed5 Qd5 8.bc5 Bc5 9.Ngf3 =.

4.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.a3).

4.e3 Nbd7 5.d4 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

4.e3 Nbd7 5.Nf3 e6 6.Be2 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

4.e3 e6 5.c4 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 e6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.e3 a6 6.Nh4 Be6 7.h3 c5 8.Nf3 d4 (8...Qb6!?=) 9.ed4+/– cd4 (9...cb4 10.ab4 Bf5 11.b5+/–) 10.Nd4 Nb6 (better is 10...Bd5!?+/–) 11.Ne6+- fe6 12.Nc3 Qc7 13.Qf3 Qe5 14.Be2 Nbd5 15.Na4 Qe4 16.Qe4 Ne4 17.Bh5 g6 (17...Kd8+-) 18.Bh8 gh5 19.Be5 Rc8 20.c4! Rc4 21.d3 Rc2 (21...Nb4 22.ab4 (22.de4?! Nc2 23.Kd2 Na1+=) 22...Rb4 23.f3+- (23.de4?! Re4 24.Kd2 Re5+-)) 22.de4 Nf6 23.Nc5 b6 24.Na6 Ne4 25.0-0 Nd2 26.Rfc1 Rc1 (26...Rc4 27.Rd1 Bh6 28.a4+-) 27.Rc1 Bh6 28.Rc8 Kf7 29.Rh8 (better is 29.b5!? Ne4 30.Rc6 Nf6+-) 29...Kg6 (29...Nc4 30.Rh7 Kg6 31.Re7+-) 30.a4 Nc4 31.Bc3 e5 32.Rc8 Nd6 33.Rc6 Kf5 34.Rb6 Ne4 (34...e4 35.Bd4+-) 35.Rh6 Nc3 36.Nc5 Ne2 37.Kf1 Nd4 38.b5 e6 39.b6 e4 40.b7 Nc6 41.Nd7 Kg5 42.Re6 Nd8 43.b8Q Ne6 44.Qe5 Kh4 (44...Kg6 45.Qf6) 45.Qg3 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

5.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

5.e3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.g3 e6 6.Bg2 Bd6 7.d3 b6 (7...a5 8.b5=+) 8.c4 Rc8 (8...c5 9.Nh4 Bg6 10.Ng6 hg6 11.Qb3+=) 9.Nd4 (9.cd5!? e5 10.Nh4+-) 9...c5+= 10.Nf5 ef5 11.bc5 Rc5 12.cd5 Rc8 (12...0-0 13.Nd2+=) 13.0-0 0-0 14.Nd2 Be5 15.Be5 Ne5 16.Qb3 Re8 17.e4 fe4 18.de4 Ned7 19.Rae1 Nc5 20.Qb1 Nfd7 21.Nb3 Nb3 22.Qb3 Nc5 23.Qb1 Qf6 24.Rc1 Qd4 (24...Qd6 25.f4+/-) 25.Rfd1 Qa4 26.Qb4 Qd7 27.Rc4 h6 28.Rcd4 Qd6 29.f4 f6 30.Re1 Re7 31.Bh3 Rd8 32.Bf5 Nb7 (better 32...a6!?+/-) 33.Qd6+- Nd6 34.Be6 White prepares the advance e5 34...Nf7 (34...Kf8 35.a4+-) 35.e5 White intends d6 35...Kf8 (35...fe5 36.fe5 Rde8 37.Bf7 Kf7 38.e6 Kf6 39.Rf4 Kg6 40.h4+-) 36.Bf7 Rf7 (36...fe5 37.fe5 Kf7 38.e6 Ke8 39.d6+-) 37.e6 Rb7 38.d6 Ke8 39.f5 b5 40.e7 (better 40.Rc1 Rb6 41.d7 Ke7 42.Kf2+-) 40...Rdd7 (40...Rc8+-) 41.Rg4 g5 (41...Re7 42.de7 Re7 43.Re7 Ke7 44.Rg7 Kd6 45.Ra7 h5+-) 42.fg6 (42.fg6 Re7 43.de7 Re7 44.Re7 Ke7 45.g7+-) 1-0. Feng,Tommy - Welsh,Vinh, National Junior High K9, 2019. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

5.Nh4 Be6 6.e3 c6 7.Be2 Nb6 8.Bd4 Qc7 9.0-0 Ne4 10.f4 0-0-0 11.a4 f6 (better is 11...Kb8!?+/–) 12.a5+- Nd7 13.Ba7 g5 14.fg5 fg5 15.Nf3 g4 16.Nd4 Qd6 (16...g3 17.hg3 (17.Ne6?! gh2 18.Kh1 Ng3 19.Kh2 Nf1 20.Kg1 Qh2 21.Kf1 Rg8+-) 17...Bh3 18.Rf3+-) 17.a6 (17.Ne6 Qe6 18.Bg4 Qd6+-) 17...b6 (17...g3 18.h3 Nf2+-) 18.Ne6 Qe6 19.Bb6! Nb6 (19...g3 20.a7 gh2 21.Kh1 Ng3 22.Kh2 Nb6+-) 20.Bg4 (20.Bg4 Qd7 21.Bd7 Kd7 22.Qg4 Kd6 23.d3+-) 1–0. BlackDemon (2610) – Jatiwangi, FICS rated standard game, 2013.

5.Nh4 Be6 6.e3 g6 7.Be2 Bg7 8.0-0 c5 9.f4 Kf8 (9...Qb6 10.Bc3=) 10.g4+= d4 11.ed4 cb4 12.ab4 Nb6 13.c3 Qd7 14.f5 gf5 15.Nf5 Bf5 16.Rf5 Rg8 (16...h5!?+=) 17.Qf1+/– e6? (better is 17...Bh6+/–) 18.Rf6+- Bf6 19.Qf6 Nd5 20.Qh6 Rg7 (20...Ke8+-) 21.c4 (21...Kg8 22.cd5 ed5 23.Nc3+-) 1–0. marekt – SteVeYboY, ChessWorld.net, 2003.

5.Nh4 Bg6 6.Ng6 hg6 7.g3 (7.e3 e6=) 7...c6 8.Bg2 e5 9.0-0 a5 10.b5 Qb6 (10...cb5 11.Nc3 Nb6 12.Nb5+=) 11.bc6 (11.Nc3 Bd6=) 11...bc6+= (worse is 11...Qb2 12.cd7 Nd7 13.Nc3+=) 12.Ra2 Qa6 (12...Bc5 13.e3=) 13.e3 Rb8 14.d3 Bc5 (14...Bd6 15.Nd2=) 15.Nd2 0-0 (15...Bd6 16.c4=) 16.Qa1 (16.c4 a4=) 16...Rfe8 Black prepares e4 17.c4 Qa7 18.Nf3 e4 19.de4 de4 (worse is 19...Re4 20.cd5 cd5 21.Nd4 Rb2 22.Rb2 Rd4 23.ed4 Bd4 24.Rd1 Bb2 25.Qb2+-) 20.Nd2 a4 (20...Bd6 21.Rb1=) 21.Qd1 Re6 22.Kh1 (22.Qc2 Rbe8+=) 22...Bb6 23.Qc2 e4 becomes the focus of attention 23...Rbe8 24.Bh3 (24.Rb1 Bc5+=) 24...R6e7 25.c5 (25.Rb1 Bc5+=) 25...Nc5= 26.Nc4 Nfd7 (26...Bc7 27.Bd4=) 27.Rd1 (27.Bd4 Nb3 28.Bb6 Nb6=) 27...Bc7 28.Bd4 Qa6 29.Bf1 Nd3 (29...Qa8 30.Nd2 Ne6 A) 31.Qe4? Nd4 32.Qg2 Nb3-+; B) 31.Ne4 c5 (worse is 31...Nd4 32.Rd4 Nb6 33.Nc5+/–) 32.Bg2 Nd4 (32...cd4?! 33.Nf6 Nf6 34.Ba8 Ra8 35.ed4+=) 33.Rd4 cd4 34.Nf6 B1) worse is 34...gf6 35.Ba8 de3 36.fe3+/– (36.Qc7?! e2 37.Re2 Re2 38.Qd7 Ra8=); B2) 34...Nf6 35.Ba8 de3-+ (worse is 35...Ra8 36.ed4 Rd8 37.Qa4-/+); C) 31.Bc3+=) 30.Bd3 ed3 31.Rd3 c5 32.Ba1 Nf8 33.Kg1 Ne6 34.h4 (34.f3 Qc6 35.e4 f5=) 34...g5 35.h5 g4 36.Rd5 Qb7 37.Qf5 Qb3 38.Qc2 Rd8 39.Rb2 Rd5 40.Rb3 ab3 41.Qb3 Ng5 ½–½. Cirulis,Ilmars (1865) – Bartsch,Reinhard Andrea (2040), FICGS, 2016.

5.Nc3 Bd6 (5...c5 6.bc5 Bc5 7.e3=) 6.e3 (6.Nb5 0-0=) 6...0-0 (6...a6 7.Be2=+) 7.Be2 (7.Nb5 Be7=) 7...c5 (7...a5 8.ba5 Ra5 9.Nh4=) 8.0-0 (8.bc5!? Bc5 9.Nh4=) 8...cb4=+ 9.ab4 Bb4 10.Ba3 (10.Nh4 Bg6=+) 10...Qe7 (10...Ba3 11.Ra3 Nc6 12.Nh4-/+) 11.Nb5 (11.Bb4 Qb4 12.Ra4 Qe7=+) 11...Ba3 12.Na3 (12.Ra3 Nc6 13.Nh4 Be4-/+) 12...Nc6 13.Nb5 (13.Nh4 Rfe8-/+) 13...a6 (13...e5 14.d4 e4 15.Ne5-/+) 14.Nbd4 Nd4 15.Nd4 Be4 16.Bf3 (16.f3 Bg6-/+) 16...Bf3 (16...e5 17.Be4 de4 18.Nb3-/+) 17.Nf3 (17.Qf3 b5-/+) 17...Ne4 18.Ne5 (18.Nd4 b5-/+) 18...f6 (18...Qc7 19.Nd3-+) 19.Ng4 (19.Nd3 a5-/+) 19...Rac8 (better 19...b5-/+) 20.d3? (better 20.f3 Nd6 21.Ra2-/+) 20...Nc3-+ 21.Qf3 e5 (21...h5 22.Nh6 gh6 23.Qh5-+) 22.Qh3? (better 22.e4 de4 23.de4-+) 22...f5 23.f4 (23.Ne5 Ne2 24.Kh1 Qe5-+) 23...fg4 24.Qg4 ef4 25.Rf4 (25.ef4 Ne2 26.Kh1 Rc2 27.Rae1-+) 25...Rf4 (better 25...Qe3 26.Kh1 Qf4 27.Qe6 Qf7-+) 26.Qc8-/+ Rf8 27.Qc3 Qe3 28.Kh1 Qe2 (28...Qf4 29.h3 Qf6-/+) 29.Qe1 (29.h3 Qe6-/+) 29...Qc2 (29...Qe1!? 30.Re1 Rc8 31.Rc1-+) 30.Qe6-/+ Kh8 31.Qe7 (better 31.Qd5!? Qb2 32.Rg1-/+) 31...Qf2 32.Qe1 (32.h3 Qf6 33.Re1 Qe7 34.Re7 Rb8-+) 32...d4 (32...Qe1 33.Re1 b5 34.Kg1-+) 33.Rc1 (33.h3 Qe1 34.Re1 b5-+) 33...h6 34.Rc7 (34.Qg1-+) 34…Qe1 0–1. Guest23622 – Guest23753, internet, 2003.

5.c4 dc4-/+ 6.Qc1 Nbd7 7.Qc4 Nb6 8.Qb3 Be7 9.Nc3 0-0 10.d3 a5 11.b5 a4 12.Qc2 Nfd5 13.e4 Nc3 14.Bc3 Bg6 15.Ne5 Bf6 16.Be2 Nd7 (16...Rc8 17.Ng6 fg6 18.e5=) 17.Nd7 (17.Ng6 Bc3 18.Qc3 fg6+=) 17...Bc3= 18.Qc3 Qd7 19.0-0 Rfd8 20.Rfc1 Qb5 (20...Rdc8 21.h4 h6 22.h5=) 21.Rab1+= Qg5 22.Rb7 h6 23.g3 (23.Rc7 e5+/–) 23...Rab8 24.Rb8 Rb8 25.Qc7 Rb3 26.h4 Qd2 27.Qc8 (27.Qd8 Kh7 28.Rc8 Qe1 29.Bf1+-) 27...Kh7= 28.Qc2 Qc2 29.Rc2 f6 (worse is 29...Ra3 30.h5+-) 30.Ra2 e5 31.Ra1 (31.f4 Bf7 32.Ra1 Rb2+=) 31...Be8= 32.Kf1 Bb5 33.d4 Be2 34.Ke2 ed4 35.Rd1 Ra3 36.Rd4 Ra1 37.Kf3 Kg6 38.Rd5 h5 39.e5 a3 40.ef6 gf6 41.Ra5 Ra2 42.Ke3 Ra1 43.Kf4 a2 (better is 43...Rf1!? 44.Ra3 Rf2 45.Ke4 Rf1=) 44.Ra6 Kg7 (44...Rb1!? 45.Ra2 Rb4 46.Ke3 Kf5+/–) 45.Kf5+- Rb1 46.Ra7 (worse is 46.Ra2 Rb5 47.Ke4 Kf7+/–) 46...Kh6 47.Ra2 Rb6 48.Re2 Rb3 49.Kf6 Rf3 50.Ke5 Ra3 51.Kf4 Ra4 52.Re4 Ra6 53.Kf5 (53.Kf5 Ra7 54.Re6 Kh7 55.f3+-) 1–0. Vastrukhin,Oleg (2290) – Ognerubova,Anastasia (2100), Voronezh op–A, 2008. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.Nf3 e6)

5.d4 Bd6 6.e3=+.

5.d4 Be7 6.e3 0-0 7.Bd3 Bd3 8.Qd3 b6 (8...Nbd7 9.0-0=) 9.0-0 c5 (9...a5 10.b5=) 10.dc5 (10.bc5 bc5 11.c4 dc4 12.Qc4 Nbd7=) 10...bc5 11.bc5 Bc5 (11...Nbd7 12.c6 Nc5 13.Qe2=) 12.Nbd2 (12.c4 dc4 13.Qd8 Rd8 14.Bf6 gf6=) 12...Nbd7 13.c4 (13.Rab1 Qe7=) 13...dc4 (13...Qe7 14.cd5 Nd5 15.Rfd1=) 14.Nc4 Qe7 (14...Nb6 15.Qd8 Rfd8 16.Rac1=) 15.Rfd1 Rfd8 16.Qc3 (16.Na5 Rdc8=) 16...Nb6 17.Rd8 Rd8 18.Nb6 (18.Nce5 Rc8=) 18...ab6 19.h3 (19.Rc1 Rd5=) 19...Rd5 (19...Rd7 20.Rc1=) 20.Ne5 (20.Rb1 e5=) 20...Qd8 (20...Qd6 21.Nc4 Qc6=) 21.Ng4 (21.Qc2 Rd2 22.Qb1 Qe7=) 21...Be7 (better 21...Rd1!? 22.Rd1 Qd1 23.Kh2 Ng4 24.hg4 Qg4-/+) 22.Nf6= Bf6 23.Qc2 (23.Qb4 Bb2 24.Qb2 h6=) 23...Bb2 (23...Be7 24.Bc3=) 24.Qb2 Rd1 (24...h6 25.Rb1 b5 26.e4=) 25.Rd1 Qd1 26.Kh2 Qd6 27.g3 (27.f4 f6=) 27...h6 (27...e5 28.a4=) 28.Qb4 (28.e4 e5=) 28...Qb4 29.ab4 Kf8 30.e4 Ke7 (30...e5 31.Kg2=) 31.e5 Kd7 (31...f6 32.f4=) 32.b5+= f6 33.f4 Ke7 34.h4 (34.g4 f5+=) 34...f5 35.h5 (35.Kh3 Kf7=) 35...Kf7 36.Kh3 g6 37.hg6 Kg6 38.Kh4 h5 (38...Kg7 39.Kh3=) 39.Kh3 Kf7 40.Kh4 Kg6 41.Kh3 Kf7 42.Kh4 Kg6 ½–½. Fournier,Frederic (2005) – bobof (1845), Active, 2004.

5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.e3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Nh4 Bg4 6.h3 Bh5 7.g4 Ne4 8.Nf3 Bg6 9.d3 Nd6 10.Ne5 Nd7 11.Ng6 hg6 12.Nd2 c6 13.Qc1 (13.c4 a5+=) 13...e5 (13...Qc7 14.Bg2=) 14.c4 (14.Bg2 Qf6+=) 14...Be7 (14...Qf6 15.Bg2 dc4 16.Nc4 Nc4 17.Qc4+=) 15.Bg2+= Rc8 16.cd5 (16.c5!? Nb5 17.Nf3+=) 16...cd5= 17.Qd1 d4 18.0-0 (18.Ne4 Ne4 19.Be4 Qb6=) 18...Bg5 19.a4 Bf4 20.Nc4 Nc4 21.dc4 Qb6 22.Qb3 Nc5 (better is 22...a5!? 23.b5 f5 24.gf5 gf5=) 23.Qa3+= Ne6 24.c5 Qc7 25.e3 de3 26.fe3 Bg5 27.Rad1 (27.a5!?+=) 27...a5= 28.Rd6 ab4 29.Re6 (29.Qb4 Be3 30.Kh1 0-0 31.Qb7 Qc5=) 29...fe6+= 30.Qd3 Be3 (30...Rh6!? 31.h4 Be3 32.Qe3 Qc5=) 31.Qe3+= Exerts pressure on the isolated pawn 31...Qc5 32.Re1 b6 (32...Kf7 33.Be5 (worse is 33.Bb7 Rh3 34.Qc5 Rc5+=) 33...Qe3 34.Re3 Rc1 35.Kf2+=) 33.Be5 Qe3 34.Re3 Rc1 35.Kh2 0-0 36.Kg3 Rfc8 (36...Rd8 37.Kf4+=) 37.Kh4 (37.Bd4 R8c4 38.Bb6 R1c3=) 37...R8c5 (37...Kf7 38.Bd4+/–) 38.Bd6 (38.Bd4 Ra5+/–) 38...R5c2 (38...Ra5 39.Bb4 (39.Re6?! b3=) 39...Ra4 40.Bd6+/–) 39.Be4 Rc3 40.Re2 b3 (40...g5 41.Kg5 b3 42.Bg6+-) 41.Bg6 R1c2? (better is 41...Rc8!?+/–) 42.Re6+- Rc8 43.Bc2 bc2 44.Bf4 c1Q 45.Bc1 Rc1 46.Rb6 Ra1 (46...Rc5 47.Rb5 Rc3 48.a5+-) 47.Ra6 Ra3 48.g5 Kf7 (48...Kh7 49.Ra7+-) 49.Ra7 Kg6 50.Kg4 Rc3 51.Ra6 Kf7 (51...Kh7 52.a5 Rc4 53.Kh5+-) 52.h4 Rc4 (52...g6 53.Rf6 Kg7 54.a5+-) 53.Kh5 Rc7 (53...Rc8+-) 54.a5 Rc4 55.Rb6 Rc8 (55...Ra4 56.a6 Ra5 57.Rb7 Kg8 58.a7+-) 56.a6 Rh8 57.Kg4 Rc8 58.a7 Rc4 59.Kh5 Ra4 (59...g6 60.Rg6 Ra4 61.Rb6 Ra7 62.Kh6+-) 60.Rb7 Kg8 61.Rb8 Kf7 62.g6 1–0. Lerch,Patrice – Gvanceladze,Anna, 31st Avoine Open, 2016. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.Nf3 e6)

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.e3 c5 (8...Be4 9.Rg1=) 9.bc5 (9.Ng6 hg6 10.bc5 Bc5=) 9...Bc5 10.g5 (10.Ng6 hg6 11.Nc3 Nc6=) 10...Ne4 11.Bg7 (11.Ng6 hg6 12.h4 Ng5 13.Bg7 Rh5=) 11...Rg8 12.Bb2 Qg5 13.Ng6 Qg6 14.Qg4 Nd7 (14...Nc6 15.d3 Nd6 16.Nd2=) 15.c4 (15.Nc3 Nc3 16.Bc3 h5 17.Qg6 Rg6=) 15...dc4 16.Bc4 Rc8 17.Bd3 (17.Be2 Bd6=) 17...f5 18.Qg6 Rg6 19.Be4 fe4 20.Nc3 Nf6 21.a4 (21.Ke2 a6=) 21...Be7 (21...e5 22.Rc1=+) 22.Ke2= ½–½. aspasio – jessamine, net–chess.com, 2014.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Bg2 Be4 9.f3 Bg6 10.Ng6 hg6 11.e4 de4 12.fe4 c6 13.Rf1 Be7 14.e5 Nd5 15.Qf3 Bh4 16.Ke2 Qe7 17.c4 Nb6 18.Qb3 Na6 19.d4 0-0-0 20.Nc3 White prepares b5 20...Nc7 21.a4 White intends b5 21...Qf8? (better is 21...Rd4 22.Ne4 Re4 23.Be4 Na6+/–) 22.a5+- Nd7 23.b5 c5 (23...Nb8+-) 24.b6 ab6 25.Nb5 (worse is 25.ab6 Na6 26.Nb5 Ndb8 27.Na7 Kd7 28.Bb7 Nb4 29.Qa4 Ke7 30.dc5 Bg5 31.Qb4 Rh3 32.Nc8 Rc8 33.c6 Ke8 34.Qf8 Kf8 35.Bc8 Nc6+-) 25...Nb5 26.Qf3 (26.Qf3 Re8 27.Qb7 Kd8 28.Bc6 Nc7 29.ab6 Ke7 30.Qc7 Rd8 31.Ra7 f5 32.Bd7 Qf6 33.ef6 Kf6 34.d5 Ke7 35.Bc6 Rd7 36.Qd7 Kf8 37.Qg7; 26.cb5 cd4 27.Bd4 Nc5+-) 1–0. capablancaven (1815) – rgold52 (1820), gameknot.com, 2011.

5.Nh4 Bg6 6.Ng6 hg6 7.e3 Be7 8.d4 0-0 (8...Qd6 9.h3=) 9.c4+= c6 10.c5 a5 11.Nd2 Nbd7 12.Be2 ab4 13.ab4 Ra1 14.Qa1 b6 15.0-0 b5 16.Nb3 Ne4 17.f3 Nef6 18.Qa5 Qa5 19.Na5 Nb8 20.Ra1 Rc8 21.Kf2 Bd8 22.Nb7 Be7 23.Ra8 Nfd7 24.Na5 Rd8 25.Ra7 Bh4 26.g3 Bg5 27.h4 Bf6 28.Rc7 Na6 29.Rc6 (29.Rc6 Nb4 30.Rc7+-) 1–0. emmasdad – Szkodnikow_i_ofiar, ChessWorld.net, 2015.

6.e3 a6 7.Be2 c5 8.bc5 Bc5 9.Nb3 Be7 10.0-0 0-0 11.Nc3 Nc6 12.Rb1 Ne4 (12...b5!?=+) 13.Ne4= Be4 14.d3 Bg6 15.Nd4 (15.Bh5 Bh5 16.Qh5 b5=) 15...Rb8 (15...Rc8 16.a4=+) 16.Nc6= bc6 17.Qd2 Qd7 18.Qa5 (18.Be5 Rb1 19.Rb1 f6=) 18...Rb5 19.Qc3(19.Qa6? Rfb8-+) 19...Rfb8?? (better is 19...f6 20.d4 Rb6=) 20.Qg7 1–0. lucya (2210) – sToRmYkNiGhT (1640), GameColony.com, 2002.

6.e3 Bd6 7.Nb5= Be7 8.Be5 Na6 9.Nd4 c6 (better is 9...Nb8=) 10.Ba6+- ba6 11.Nc6 Qd7 12.Ne7 Qe7 13.0-0 0-0 14.f4 (14.Nc3 a5 15.ba5 Nd7+/–) 14...Rfc8 (14...a5 15.ba5 Rfc8 16.Nc3+/–) 15.Nc3 Nd7 16.Bd4 f6 17.f5 Bf7? (better is 17...Bf5!? 18.Nd5 Qd6+=) 18.fe6+- Be6 (18...Qe6 19.Qf3+-) 19.Qh5 Rc4 (better is 19...a5+-) 20.Nd5 (20...Qd6 21.Nc3+-; 20.d3 Rc6 21.Nd5 Qf7 22.Qf7 Kf7+-) 1–0. b4_player (2215) – chimchim (2035), GameColony.com, 2003.

6.e3 Nbd7 7.Be2=+.

6.e3 Nbd7 7.f4 a6 8.Be2= Bd6 9.0-0 0-0 10.Nc3 c5 11.bc5 Nc5 (11...Bc5 12.Nb3=) 12.f5 ef5 13.Nf5 Bf5 14.Rf5 Nce4 (14...Qd7 15.Bg4 Qc7 16.Rf6+-) 15.Ne4+= (15.Nd5? Nd5 16.Bf3 Ndf6 17.Be4 Ne4-+) 15...Ne4 16.d3 Nc5 17.Bf3 Qe7 (17...Qc7 18.g3 Rae8 19.Qd2+= (19.Rd5?! Re3 20.Bd4 Re7=)) 18.Qd2+/– (18.Rd5?! Qe3 19.Kh1 Rad8=) 18...Rae8 19.Rd5 Bb8 (19...b5 20.c4+/–) 20.Re1 Qc7 (20...Bd6 21.Qc3 Ne6 22.Re2+/–) 21.g3+- Re6?? (better is 21...Rc8+-) 22.Qc3 Rg6 23.Rc5 Rg3 (23...Qe7 24.Be4 Rf6+-) 24.Kf2 Qd6 25.hg3 Qg3 26.Ke2 f6 (26...b6 27.Rc6+-) 27.Rc8 Qh2 (27...Bd6 28.Qb3 Kh8 29.Qb7+-) 28.Kd1 Bd6 29.Bd5 Kh8 30.Qf6! Qh5 (30...gf6 31.Bf6) 31.Kc1 (31...Qd1 32.Kd1 gf6 33.Bf6) 1–0. kamret (2190) – superbooper, GameColony.com, 2003.

6.e3 Nbd7 7.f4 c5 8.bc5 Bc5 9.Be2=+.

5.d3 a5 6.b5 c6 7.a4 (7.bc6 Nc6 8.e3 d4=+) 7...Qb6 8.Nf3 cb5 9.ab5 Qb5 10.Nd4 (10.e3 Nc6-/+) 10...Qd7 (better 10...Qb2!? 11.Nb3 Nc6-+) 11.Nf5-/+ Qf5 12.Qd2 (12.e3 Nc6=+) 12...Nc6 13.e3 Bd6 14.Be2 0-0 15.0-0?? (15.c3 b5-/+) 15...Rfe8 (better 15...Qe5 16.f4 Qa1-+) 16.Na3 (16.d4 Qe6-/+) 16...Rad8 (better 16...Qe5!? 17.g3 Bb4-+) 17.Nb5 Bb8 18.g3 b6 19.Rfb1 Ne5 (19...Qe6!?=+) 20.Nd4= Qc8 21.Rb6 Ba7 22.Rb5 Bd4 23.ed4 Nc6 24.Rc5 Increasing the pressure on the isolated pawn on a5 24...Re2? (better 24...Qe6 25.Qc3 Qe2 26.Rc6 a4=) 25.Qe2+- Nd4 26.Qe7 Qb8 27.Rc7 (27.Rca5 Nc6 28.Qd8 Nd8+/-) 27...Rf8 28.Kg2 (28.Ra5!? Ne6 29.Rb7 Qe5+-) 28...Ne6+/- 29.Rb7 Qe5 (29...Qa8 30.Ra7 Qc6 31.Qd7 (31.R1a5?! d4 32.Kg1 Qc2=) 31...Qd7 32.Rd7+-) 30.Ra5 h5 (30...Qd4 31.Qd6 Qc3 32.Raa7+-) 31.h4 (better 31.c4!? Qe1 32.Rd5 Qe2+-) 31...Qe2 32.Rd5 Qc2 33.Rdd7?? (33.Qb4 g6+-) 33...Qe2?? (better 33...Qc6 34.Kh2 Qc2=) 34.Qd6 (34.Qb4 f5 35.Rb8 Rb8 36.Qb8 Kh7+-) 34...Qg4 (34...f5 35.Qd5 f4 36.Qf5 f3 37.Qf3 Qf3 38.Kf3+-) 35.Rb8 (35.Re7 Qg6+-) 35...Rb8? (better 35...Nf4!? 36.Kg1 Nh3 37.Kh2 Rb8 38.Qb8 Kh7+/-) 36.Qb8+- Kh7 37.Rf7 Kg6 (37...Qf5 38.Qe8 Nf4 39.gf4 Qg4 40.Kf1 Qd1 41.Qe1 Qd3 42.Qe2 Qb1 43.Kg2 Qg6 44.Kh3 Qf7=) 38.Qd6 (better 38.Ra7 Kh7 39.f3+-) 38...Kf7-+ 39.Qd7 Kg6 40.Qe8 (40.Qd6 Qf5 41.Qc6 Qe5-+) 40...Kh7 41.Qb5? (41.Qb8-+) 41...Nf4 42.Kg1 Ne2 (better 42...Qd1 43.Kh2 Nd3 44.Kg2-+) 43.Kg2 Nd4 44.Qd5 f5 (44...f5 45.f3 Nc2 46.fg4 Ne3 47.Kf3 Nd5 48.gf5 Kg8-/+) 0-1. black_bishop_88 (2650) - Krokozyablykk (2060), lichess.org, 2020. (=1.a3 Nf6 2.b4 d5 3.Bb2 Bf5)

5.d3 c6 6.Nd2 Bd6 7.e4 Be6 8.ed5 Bd5 9.Ngf3 0-0 10.Be2 (10.c4 Bf3 11.Nf3 Re8 12.Be2 a5=+) 10...Re8 (10...a5 11.ba5 Bf3 12.Bf3 Re8 13.Kf1 Ra5 14.Nc4-/+) 11.0-0 Nd7 (11...a5 12.ba5 Ra5 13.c4=+) 12.c4= Be6 13.d4 f5 14.h3 Qf6 15.Bd3 (15.Re1 Re7=) 15...Rad8 (15...Re7 16.Qb3 b5 17.Qc3=) 16.Qc2 Bb8 17.Rae1 g5 (17...Re7 18.Re2=) 18.d5+= cd5 19.cd5 Bd5 20.Re8 Re8 21.Bf5 Nf8 22.Re1 (22.Be4!? Be4 23.Ne4+=) 22...Re1=+ 23.Ne1 Qe5 (23...Qa1 24.Qb1 Qa3 25.Ne4 Be4 26.Be4=+) 24.Nef3 Qa1 25.Qb1 Qa3 26.Ng5 h6 27.Nh7 (27.Bh7 Kg7 28.Be4 Qa2+=) 27...Nh7 28.Bh7 Kg7 29.Be4 Qc3 (29...Bc6 30.b5 Be4 31.Qe4 Qc1 32.Nf1=) 30.Nf3 (better 30.Bd5 Qd2 31.Bb7+/-) 30...Be4=+ 31.Qe4 Qa1 (31...Bd6 32.b5=+) 32.Ne1= Qe5 33.Qb1 a5 (33...a6 34.g3=+) 34.Nf3 Qb5 35.Qa1 Kg8 36.ba5 Qd5 (36...Bc7!?=) 37.Qc3 (37.Qc1 Qf5+/-) 37...Qd6 (better 37...Qd1!? 38.Ne1 Bc7+/-) 38.g3+- Qd5 39.Kg2 Bd6 40.Qc8 Kg7 41.Qg4 Kh7 42.Qd4 Qc6 43.Qd3 Kg7 44.a6 (better 44.Qe3+/-) 44...Kg8?? (better 44...ba6 45.Kh2 Bc7=) 45.a7+- h5 (45...b5 46.Qd4 Qb7 47.Qd6 Qa7 48.Qh6 Qc5+-) 46.a8Q (46.a8Q Kg7 47.Qa1 f6 48.Qab1+-) 1-0. black_bishop_88 (2525) - Hovik7 (2665), lichess.org, 2020. (=1.a3 Nf6 2.b4 d5 3.Bb2 Bf5)

5.d4 c6 6.e3=+.

5.d4 Bd6 6.e3= Qe7 (6...a5 7.b5=) 7.Bd3 Qe6 (7...Be6 8.Nf3=) 8.Bf5 Qf5 9.Nd2 a5 10.c4 Nd7 (10...Qg6!? 11.Ne2 Qg2= (< 11...ab4 12.c5+/–)) 11.c5 Be7 12.b5 0-0 (12...a4 13.Ne2+/–) 13.Ne2 (13.Qf3 Qd3+/–) 13...Rfe8+= 14.0-0 Nf8 (14...b6 15.c6 Nf8 16.Qb1+/–) 15.Ng3 (15.Qb1 Qd7+/–) 15...Qd7+= 16.a4 f5 (16...b6 17.Rc1+=) 17.Nf3 (17.Qf3 g6+/–) ½–½. Woschkat,Karl_Heinz – Harding,Simon, IECG, 1998.

5.Nf3 Bd6=+.

4.Nc3 Bg7 5.d4 0-0 6.e3 c6 7.g3 (7.Bd3 Nbd7=) 7...a5 8.Bg2 ab4 9.ab4 Ra1 10.Ba1 Qb6 11.Qb1 Bf5 12.Nge2 Nbd7 13.0-0 Ra8 14.Bb2 (better 14.h3!?=+) 14...Qb4-+ 15.e4 (15.h3!?-+) 15...de4 (better 15...Ne4 16.Ne4 Be4-+) 16.Ne4?? (16.h3-+) 16...Ne4 (worse 16...Be4 17.Be4 Ne4 18.c3-+) 17.Be4 Be4 18.f3 Bd5 19.c3 (19.Bc3 Qb1 20.Rb1 b5-+) 19...Qb3 20.Qc1 (20.Rf2-+) 20...Ra2 21.Nf4 Qb2 22.Nd5 (22.Qb2 Rb2 23.Re1 e6 24.Nd5 cd5-+) 22...cd5 (22...Qh2) 23.Qb2-+ Rb2 24.Ra1 (24.Re1 e5-+) 24...h5 (24...Rc2!? 25.Ra8 Nf8 26.Ra7-+) 25.Ra8 Kh7 26.Ra7 (26.Ra5 e6 27.h4 Rb3-+) 26...Nf6 (better 26...e5 27.Ra3-+) 27.f4 (27.Ra5 Bh6 28.Kf1 Be3-+) 27…Ne4 0–1. TWW_LONDON – lordsami, lichess.org, 2020.

4.c4 c6 5.e3 Bg7 6.Nc3 0-0 7.d4 Nbd7 8.Nf3 dc4 9.Bc4 Nb6 10.Ba2 Nbd5 11.Nd5 cd5 12.0-0 Bg4 13.h3 Bf5 14.Rc1 Qd6 15.Ne5 Ne4 16.f3 Ng3 17.Rf2 h5 18.Rc5 e6 19.Kh2 (19.Bb1!?+=) 19...h4= 20.Qa4 (20.Kg1!?=) 20...f6-/+ 21.Qd7 Qd7 22.Nd7 Rf7 23.e4 Rd7 24.ef5 gf5 25.Rfc2 Bf8 26.Rc7 Rad8 27.Bc1? (27.Kg1 Bd6 28.R7c3 f4-/+) 27...Bd6 (better 27...Rc7 28.Rc7 Bd6-+) 28.Rd7-/+ Rd7 29.Rc8 (better 29.Kg1!?-/+) 29...Kf7 30.f4 (30.Kg1 Ne2 31.Kf1 Nd4-+) 30...Rc7 31.Rc7 Bc7 32.Be3 (32.Bb3-+) 32…Nf1 (32...Nf1 33.Kg1 Ne3-+) 0-1. Norkeliunas,Matas - Sarauskas,Andrius (1745), TCh-LTU, 2019.

4.e4 de4!? 5.Qe2 Bg7=+.

4.e4 Bg7 5.e5= Nfd7 6.d4 0-0 7.Nf3 a5 8.Nbd2 ab4 9.ab4 Ra1 10.Ba1 Nb6 11.Be2 Bg4 12.0-0 Nc6 13.c3 Bf3 14.Nf3 (worse 14.gf3 e6-/+) 14...e6 15.b5 Ne7 (15...Na5 16.Bb2+=) 16.Bb2+= Qd7 17.Ba3 Ra8 18.Bb4 c6 19.Bc5 Na4 20.Qa1 b6? (20...Nf5 21.bc6 Qc6 22.Rb1=) 21.Bd6 (better 21.Be7!? Qe7 22.bc6+-) 21...Nc8 22.Bb4 cb5 23.Rb1 Qb7 (23...Qc6 24.Qa3=) 24.Qa3 (24.Bb5 Nc5 25.Qb2 Na6+=) 24...h5 (24...Qc6 25.Qc1+=) 25.Ng5 (25.Bb5 Nc5 26.Qb2 Na6+-) 25...Nc5 26.Qc1 Ne4? (26...Na6+=) 27.Qf4?? (27.Ne4 de4 28.Qe3 Kh7+-) 27...Na7?? (better 27...Bh6 28.h4 Ra2=+) 28.Ne4+- de4 29.Re1 (29.Bd1 Bf8 30.Bc2 Bb4 31.Be4 Nc6 32.cb4 Qd7 33.Bc6 Qc6+-) 29...Rb8 (29...Bf8 30.Bf8 Rf8 31.Bh5+-) 30.Bd6 Rc8 31.Bd1 (better 31.Qe3+-) 31...Rc3=+ 32.h3 (32.Re4 g5 33.Qd2 Qe4 34.Qc3 Nc6-/+) 32...Qc6 (better 32...Nc8 33.Re4 Nd6 34.ed6 Bf8-/+) 33.Bh5? (better 33.Be2=+) 33...gh5-+ 34.Qg5 Rc1?? (better 34...Nc8 35.Bb4 Rd3-+) 35.Rc1+- (35.Qc1?! Qc1 36.Rc1 b4+-) 35...Qc1 (35...Qe8 36.Be7 b4+-) 36.Qc1 b4 (36...e3 37.fe3 Bh6 38.Kf2+-) 37.Qd1 (better 37.Bb4!? Nb5 38.Qc4 Nd4 39.Qd4 e3+-) 37...b3 (37...Nb5 38.Bb4 Nc7 39.Qh5+-) 38.d5 (better 38.Qb3!? Nc8+-) 38...b2 39.de6 b1Q (39...fe6 40.Qb3 e3 41.Qb2 Nc8+-) 40.Qb1 fe6 41.Qb3 (better 41.Qb6 e3 42.Qa7+-) 41...Be5 42.Qc2 (42.Qe6 Kg7 43.Be5 Kf8 44.Bf4 Kg7 45.Bh6 Kh7 46.Qf6 e3 47.Qg7) 42...Bd6+- 43.Qc3 (better 43.Qe4 Kf7+-) 43...Kf7 44.Qd2 (44.Qh8 Nc6 45.Qh5 Kf6 46.Qh8 Ke7 47.Qh7 Ke8+-) 44...Nb5 45.Qe2 (45.Qe2 Nd4 46.Qh5 Kg7 47.Qg4 Kf7 48.Qe4+-) 1–0 (time forfeit). twelveTeen (2610) – Kidefence (2515), 2018.

4.f4 Bg7 5.Nf3 0-0 6.e3 a5 7.b5 c5 8.a4 (8.Be2 Bf5=) 8...d4 9.Be2 (9.ed4 Nd5=) 9...Nd5 (9...de3 10.de3 Qd1 11.Bd1=) 10.c4= Nb4 11.ed4 cd4 12.d3 Qd6 13.Qd2 Bf5 (13...Nd7 14.0-0+=) 14.Ba3 (14.0-0 Nd7=) 14...Nd7+= 15.Nh4 (15.0-0 Nc5 16.Bb4 ab4 17.Qb4 Bd3 18.Bd3 Nd3 19.Qd6 ed6+=) 15...Nc5-/+ Now all is on d3 16.Nf5 gf5 17.0-0 (better is 17.Bb4!? ab4 18.Ra2-/+) 17...Nb3-+ (17...Na4?! 18.Bf3 Rfb8 19.Qe1=) 18.Qb2 Na1 19.Qa1 Qe6 20.Rf2 Qe3 21.Bb4 (21.Kf1!? Nc2 (21...Nd3 22.Rf3+/–) 22.Qb2 Na3 23.Qa3 Rab8-+) 21...ab4 22.a5 e5 23.Qa4 e4 24.Qb4 Rfc8 (24...Rfe8!? 25.Nd2-+) 25.Nd2 ed3 (better is 25...Re8!?-+) 26.Bf3+= Bf8 27.Qb2 (27.Qb1 Ra5 28.Bb7 Rb8=) 27...Ra5-/+ 28.Bb7 Rb8 (28...Ba3 29.Qb1 Rc5 30.Bc6+=) 29.Bd5+= Ba3 (better is 29...Ra3+=) 30.Qb3?? (better is 30.Qb1=) 30...Bc1 31.Nf1 Ra1?? (better is 31...Qe1 32.Qb1 Rd8-+) 32.Qd1-/+ Qe7 (32...Bb2 33.Qa1 Ba1 34.Ne3 de3 35.Kf1-+) 33.g3 (33.Qd3 Be3 34.g3 Re8-+) 33...d2 34.Re2 (34.Nd2 Bb2 Combination) 34...Qc5 (better is 34...Qa7!? 35.Kg2 Qa4 36.Rd2 Bd2=) 35.Re5 (35.Rd2? Qa7 36.Rf2 Be3-+) 35...d3 36.Kg2 Bb2 37.Bf7 Kh8 (37...Kf7?! 38.Qh5 (38.Rc5?? Rd1 39.Nd2 Rd2 40.Kf3 Rh2-+) 38...Kg8 39.Qg5 (39.Rc5? d1Q 40.Qd1 Rd1-+) 39...Kh8 40.Qf6 (40.Rc5 d1Q 41.Ne3 Qe2 42.Kh3 Rh1-+) 40...Kg8 41.Qg5 (41.Rc5 Bf6 42.Nd2 Ra2-+) 41...Kh8 42.Qf6 (42.Rc5 d1Q 43.Ne3 Qe2 44.Kh3 Rh1-+) 42...Kg8 43.Qg5= (43.Rc5 Bf6 44.Nd2 Ra2-+)) 38.Rc5 Rd1 39.Bh5 Rc1 40.Ne3? (better is 40.Rd5 d1Q 41.Bd1 Rd1 42.Ne3 Rd2 43.Kf3+=) 40...Bd4-+ (40...Bd4 41.Re5 Be3 42.Re3 d1Q 43.Bd1 Rd1-+) 0–1. Swartz,David (1940) – Makoto,Rodwell (2405), PSS, 2016. (=1.a3 d5 2.b4 Nf6 3.Bb2 g6)

4.Bf6 ef6 5.e3 (5.Nf3 a5 6.b5 Bd6=) 5...Nc6 (5...Bd6 6.Nc3=) 6.Bd3 (6.Nf3 Ne5=) 6...Bg7 (6...Bd6 7.Be2=) 7.c3 (7.Nf3 Ne5=) 7...0-0 8.Be2 f5 (8...Re8 9.Nf3=) 9.d4 (9.Nh3 Qf6=) 9...a6 (9...f4 10.ef4 Qd6 11.Qd2=) 10.Bf3 (10.Nf3 f4 11.ef4 Qf6=) 10...Re8 11.Ne2 Qd6 (11...g5 12.g3=) 12.0-0 (better is 12.Nd2=) 12...f4 (better is 12...g5!? 13.Ng3 g4=) 13.Nf4+/– Ne7 (13...g5 14.Nh5+/– (14.Nd5?! g4+=)) 14.Nd2 (14.c4 dc4 15.Nd2 Ra7+/–) 14...b5 (14...Bf5 15.Re1+/–) 15.Qb3 (15.c4 c6 16.cd5 cd5+/–) 15...c6 16.Nd3 (16.a4 Bf5+/–) 16...Bf5 (16...a5 17.e4+/–) 17.Nc5 Nc8 (17...h6 18.a4+/–) 18.Rfe1 (18.e4 Qf4 19.ef5 Qd2 20.fg6 hg6+/–) 18...Nb6 (18...Ra7 19.a4+/–) 19.e4 Nc4 (19...Qf4 20.Qc2 de4 21.Be4 Be4 22.Nde4+/–) 20.Nc4+- (20...dc4 21.Qa2+-; 20.ef5?! Nd2 21.Re8 Re8+=) 1–0. 73DADDELDU37 – seki@, mySchach.de, 2005.

4.g3 Bg7 5.Bg2 0-0 6.Nf3 b6 7.d4 (7.0-0 c6=) 7...Bb7 (7...a5 8.b5=+) 8.0-0= Nbd7 9.Nbd2 c5 10.c4 dc4 11.Nc4 cd4 12.Bd4 Rc8 13.Rc1 Ba6 14.Qb3 Qc7 15.Nfe5?? (better 15.b5 Bb7 16.Qb2+=) 15...Ne5-+ 16.Be5 Bc4 17.Qc3?! (17.Bc7 Bb3 18.Bb7 Nd5 19.Bc8 Rc8-+) 17...Qd7 18.Qb2 Bd5 (better 18...Qb5!? 19.a4 Qa4 20.Bb7-+) 19.Rc8? (better 19.Rcd1=+) 19...Rc8-+ (19...Qc8?! 20.Bd5 Nd5 21.Bg7=) 20.Rd1 Qa4 21.Rd2 Bg2 22.Kg2 Qc6 23.f3 Ne8 (23...Qe6 24.Qd4-+) 24.Bg7 Ng7 25.Qe5 Ne6 26.Kf2 (26.Rd3 a6-+) 26...Qc3 (26...Qc1 27.Rd3-+) 27.Qd5 (27.Qc3 Rc3 28.Ra2 Nd4-+) 27...Qa3 28.Qb7 Rc7 29.Qb8 (29.Rd8 Kg7 30.Qe4 Qa1-+ (worse 30...Nd8 31.Qe5 f6 32.Qc7-+)) 29...Kg7 30.Rd3 (30.Rd4 Qc1 31.Rh4 Qd1-+) 30...Qb4 31.Rd8 (31.h3 Qc5 32.Kg2 Qc1-+) 31…Qc5 (31...Qc5 32.Kf1 Qc1 33.Kf2 Qh1-+) 0–1. Nielsen,Thom3 – Vangsgaard,Bjarke (1940), Copenhagen CC, 2018. (=1.a3 Nf6 2.b4 d5 3.Bb2 g6)

4.h4 Bg7=+ 5.h5 Nh5 6.Bg7 Ng7 7.e3 Nc6 8.Qc1 (8.d4 h6=+) 8...e5-/+ 9.Qb2 d4 (9...f6!?-/+) 10.b5=+ Ne7 11.Nf3 f6 12.ed4 e4 13.Ng1 Ngf5 (13...Bf5 14.Bc4=+) 14.Ne2= 0-0 15.c4 (15.Nbc3 Nd6 16.Qb4=) 15...c5 (15...a6 16.ba6 ba6 17.g4=+) 16.d5 (better 16.dc5!? Ng7 17.Nbc3+=) 16...Nd6= 17.Nf4 Nef5 18.Nc3 Nd4 19.Rc1 Bf5 (19...Qc7 20.Nce2 N4f5 21.Qc3=) 20.Nce2= Ne2 21.Be2 Qe7 22.a4 b6 23.Qc3 Qe5 (23...a6 24.Rd1=) 24.Qe5+= fe5 25.Nh3 Rae8 (25...h6 26.g4 Bd7 27.Ng1=) 26.Ng5 h6 (26...h5!?+=) 27.Rh6+/- Kg7 28.Rh1 Rh8 29.Nh3 Bh3 30.Rh3 Rh3 31.gh3 Rh8 32.Bg4 Nf5 33.Ke2 Nd4? (better 33...Nd6!?+/-) 34.Ke3+- Nb3 (34...Rf8 35.Ke4 Nb3 36.Rc3 Nd2 37.Ke5 Rf2 38.d6+-) 35.Rd1 (better 35.Rc3!? Nd4 36.Ke4+-) 35...Na5 36.Rc1 Kf6?? (36...Nb3 37.Rc3 Nd4+-) 37.Ke4+- Kg5? (37...Nb7+-) 38.Ke5 Rf8 39.Kd6 (39.f3 Nb3 40.f4 Kh6+-) 39...Rf2 40.Kc7 Re2 (40...Rf7 41.Kb8 Rb7 42.Ka8 Rf7+-) 41.d6 (better 41.Be2 Nb3 42.Rg1 Kf4 43.d6+-) 41...Rd2 42.d7 Nb3 (42...Kf6 43.Rf1 Kg5 44.Be6 Rd7 45.Kd7+-) 43.Rc3 (43.Rc3 Na5 44.Be6 Rd7 45.Bd7+-) 1-0. black_bishop_88 (2690) - Coblan22 (2005), Hourly SuperBlitz Arena, lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 g6)

5.Nd2 c6 6.g3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.a3 Bg7 4.d3 0-0 5.Nd2 d5 6.g3 c6).

5.g3 0-0 6.Bg2 c6 7.Nd2 (--> 1.b4 Nf6 2.Bb2 g6 3.a3 Bg7 4.d3 0-0 5.Nd2 d5 6.g3 c6 7.Bg2).

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 d5).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

5.c4 0-0 (5...dc4 6.e4=+) 6.cd5= Nd5 7.Bg7 Kg7 8.e4 Nf6 9.Nc3 c6 10.d4 Bg4 11.Be2 Nbd7 12.h3 Bf3 13.Bf3 e5 14.Ne2 (14.0-0 Qe7=) 14...ed4 15.Qd4 Re8 16.0-0 Ne5 17.Qd8 Rad8 18.Rfd1 Nf3 19.gf3 Nh5 20.Kg2 g5 21.a4 a6 22.b5 (22.Rac1 Rd1 23.Rd1 a5=) 22...cb5 23.ab5 Rd1 24.Rd1 ab5 (24...Re7 25.Rd5 h6 26.ba6 ba6 27.Ra5=) 25.Rb1 (25.Rd5!? h6 26.Rb5=) 25...Re5=+ 26.Nd4 Nf4 27.Kh2 Nd3 (27...Rc5 28.Nb5 Rc2 29.Kg3=+) 28.Nb5= Nf2 29.Nd6 b5 30.Nb5 Rc5 (30...f5 31.ef5 Rf5 32.Kg3=) 31.Nd4 Nd3 32.Rb6 f6? (32...h5 33.Nf5 Kg8 34.h4 gh4 35.Kh3+=) 33.Nf5 (33.Ne6!? Kf7 34.Nc5 Nc5+-) 33...Kf8 (33...Kg6!? 34.Rb7 Ne5+=) 34.Rf6+/- Kg8 35.Ne7 (35.Kg3 Ne5+-) 35...Kg7 36.Rf5 Rf5 37.Nf5 (worse 37.ef5 Kf6 38.Nc6 Kf5=+) 37...Kf6 38.Kg3 h5 39.h4 gh4 40.Nh4 Kg5 (40...Ke5!? 41.Ng6 Kf6+=) 41.Ng2 Nc5 42.f4 Kf6 43.Kf3 Ke6 44.Nh4 Kf6 45.Nf5 (45.Ke3 Ke6+-) 45...Nd3 46.Ke3 Nc5 47.Nh4 Ne6 (47...Ke6+-) 48.e5 Ke7 (48...Kg7 49.f5 Ng5 50.Kf4 Nh3 51.Kg3+-) 49.f5 Ng7 (49...Nc7+-) 50.f6 Kf7 51.fg7 Kg7 52.Kf4 Kf7 53.Kf5 Ke7 54.e6 Ke8 55.Kf6 Kf8 56.e7 Ke8 57.Nf5 (57.Nf5 Kd7 58.Ng7 Kc6 59.e8Q Kd5 60.Qh5 Kc4 61.Qe2 Kc3 62.Ne6 Kb4 63.Qc2 Kb5 64.Nd4 Kb4 65.Qb2 Kc5 66.Ke5 Kc4 67.Qb3 Kc5 68.Qb5) 1-0. black_bishop_88 (2670) - Romsta (2480), lichess.org, 2020. (=1.a3 d5 2.b4 Nf6 3.Bb2 g6)

5.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

4.b5 Bb4 5.e3 c5 6.c4 (6.Nf3 Nbd7=) 6...Nbd7 7.Qb3 0-0 8.Nc3 (8.Nf3 a6=+) 8...Qe7 (8...dc4!? 9.Bc4 Ne5=+) 9.cd5= ed5 (9...Bc3 10.Qc3 ed5=) 10.Na2 (better 10.Nd5 Nd5 11.Qd5=) 10...c4?? (10...Ba5 11.Nf3-/+) 11.Qc2?? (better 11.Qb4 Nc5 12.Bd4+-) 11...Bc5 (11...Ba5 12.Nf3=+) 12.Nc3 (12.Nf3 Ng4=) 12...Nb6 (12...Re8 13.Nf3 d4 14.Nd1-/+) 13.Be2 Re8 (13...a6 14.a5 Nbd7 15.Nf3=+) 14.Nf3 (14.a5 Nbd7 15.Nf3 Bb4=) 14...Bg4 15.0-0 (15.a5 Nbd7 16.Ng5 Nf8=) 15...g6 (15...Bd6 16.a5 Nbd7 17.Nd4 Be2 18.Nce2=) 16.Nd4 (better 16.a5!? Nbd7 17.d3=) 16...Bd4-/+ 17.Bg4 Bc3?? (better 17...Ng4 18.ed4 Qd6=+) 18.Bc3?? (better 18.Qc3 Kg7 19.a5+-) 18...Ng4-+ 19.a5 Nd7 20.Qb2 (20.f3 Nge5-+) 20...Ngf6 (20...Nge5 21.Qc2-+) 21.h3 (21.a6 ba6 22.Ra6 Ng4-+) 21...Qd6 (21...Ne4 22.Bb4 Qe6 23.a6-+) 22.g4 (22.d3 Ne5 23.Rfd1 Qe6-+) 22...Ne5 (22...Ne4 23.a6 Rab8 24.ab7 Rb7 25.Bd4-+) 23.f4 (23.Qa3 Qa3 24.Ra3-+) 23...Nf3 (better 23...Nd3 24.Qc2 Ne4-+) 24.Rf3= Ng4?? (better 24...Ne4=) 25.hg4+- f5?! (25...a6 26.Rb1+-) 26.g5 (26.gf5 Rf8 27.fg6 Qg6 28.Kf2 Kf7+-) 26...a6 (26...Re6 27.Rh3+-) 27.b6 (27.ba6 Qa6 28.Rb1 Re7+-) 27...Rac8 28.Bb4 Qe6 (28...Qd8 29.Kg2 Re4 30.Bc3+-) 29.Qc3 (29.Qd4 Qe4 30.Bc3 Qd4 31.Bd4 Re7+-) 29...Rcd8 (29...Qd7 30.Ba3 Re4 31.Bb2+-) 30.Rc1 (30.Qd4 Qe4 31.Bc3 Qd4 32.Bd4 Rd6+-) 30...Rd7 (30...Qc6 31.Ba3+-) 31.Ba3 Qc6 (31...Rf7 32.Bb2 Kf8 33.d3+-) 32.Bb2 Kf7 (32...Rf8+-) 33.Qg7 Ke6 34.Qf6 1–0. afsharian – Jonepol00, lichess.org, 2018.

4.b5 c6 5.Nf3 Nbd7 6.e3 c5 (6...Bd6 7.Be2+=) 7.c4 (7.Be2 Bd6=) 7...Nb6 (7...Bd6 8.Be2=) 8.cd5 (8.d3 Bd6=) 8...Nbd5 9.Bc4 (9.d4 cd4 10.Bd4 Bb4 11.Nbd2 Nc3+=) 9...Be7 (9...Bd6 10.d4=) 10.0-0 0-0 11.d4 cd4 (11...Qd6 12.Nbd2 cd4 13.e4+=) 12.Qd4+= b6 (12...Nb4 13.Rc1=) 13.Nbd2 (13.Rd1 Bb7+=) 13...Bc5 (13...Bb7 14.Rfd1+=) 14.Qd3 (14.Qh4 Bb7+=) 14...Bb7 15.Rac1 (15.Rad1 Rc8+=) 15...Nb4 (15...Qe7 16.Bd4=) 16.Qb3 (16.Qb1 Bd6+=) 16...Rc8 17.Rfd1 Nbd5 (17...Qe7 18.Bd4=) 18.Ng5 (18.e4 Nb4+=) 18...h6 (18...Ng4 19.Nge4 Nde3 20.Be6 (20.Nc5?? Qh4 21.Qe3 Qh2 22.Kf1 Ne3 23.fe3 Rc5-+) 20...Nd1 21.Bc8 Ngf2 22.Rc5 Be4 23.Ne4 bc5 24.Nf2 Nb2 25.Qb2-+) 19.Nge4+= Ne4 (19...Nd7 20.Nf3+=) 20.Ne4+/– Qh4 21.Nc5 bc5 22.Qd3 (22.a5 Qg5 23.Rd2 Rfd8+/–) 22...Qg4 (22...Nb6 23.Qe2=) 23.h3 (worse is 23.Bd5 Bd5 (23...ed5 24.f3 Qe6 25.Qc3+/–) 24.Qf1 Qa4+=) 23...Qg5 24.Qe4 Ba8 25.h4 (better is 25.Bd3 g6 26.h4+=) 25...Qe7?? (better is 25...Qh5 26.Bd3 Nf6+/–) 26.Bd5+- Bd5 27.Rd5 1–0. Wall,Bill – Fifa,Brian, internet, 2006.

4.b5 Bd7 5.c4 c6 6.e3 Be7 7.Nf3 a6 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 0-0 11.Ne5 dc4 12.Nd7 (12.Bc4 Be8=) 12...Qd7 (12...Nbd7 13.Bc4 Ne5 14.Be2 Nd3 15.Bd3 Qd3 16.Qb1 Qb1 17.Nb1 cb5 18.Ke2+=) 13.Bc4= cb5 14.Bb5 Nc6 15.d4 Bb4 16.Ke2 (better is 16.0-0=) 16...Bc3-/+ 17.Bc3 Nd4! 18.Bd4 (18.ed4 Qb5) 18...Qb5 19.Ke1 Rc8 20.Qd1 Ne4 The mate threat is Qa5 21.f3 Qb4 (21...e5!? 22.fe4 ed4 23.Kf2 de3 24.Kf3 Qh5 25.g4 Qh3 26.Kf4-+) 22.Kf1 (22.Ke2 Qc4 23.Ke1 e5 24.fe4 ed4-+) 22...Qc4 23.Kg1?? (23.Ke1 e5! 24.fe4 ed4 25.Kf2-+) 23...Qc1 24.h3 (24.Qf1 Nd2 25.Qc1 Rc1 26.Kf2 Rh1-+) 24...Qd1 25.Kh2 Qh1 26.Kh1 Nf2 27.Kg1 Nd3 28.f4 f6 29.Kf1 e5 30.fe5 fe5 31.Bb6 e4 32.g3 Rc6 33.Bd8 b5 34.h4 b4 35.Be7 b3 36.Kg2 b2 (36...b2 37.Bf8 Rc2 38.Kh3 Nf2 39.Kg2 b1Q 40.g4 Nh1 41.Kh3 Qf1#; 36...Rc2 37.Kh3 Nf2 38.Kg2 Ng4 39.Kf1 b2 40.Bb4 b1Q 41.Be1 Ne3 42.Kg1 Qe1) 0–1. Jolayxvort,J – Frowein,Helge, Dortmund op, 1987.

4.c3 c6 5.Nf3 Bd6 6.e3 0-0 7.d4 Nbd7 8.Bd3 Re8 9.Nbd2 e5 10.Qc2?? (better 10.de5 Ne5 11.Ne5 Be5 12.0-0=+) 10...e4-+ 11.Be2 ef3 12.gf3 Nf8 13.Bd3 Ng6 14.0-0-0 a5 15.Rdg1 (15.b5 cb5 16.Bb5 Bd7-+) 15...ab4 16.h4 bc3 (16...Qa5 17.h5 Ne7 18.e4 bc3 19.Bc3 Ba3 20.Kd1 Qa4 21.e5 Qc2 22.Kc2-+ (22.Bc2?? Nd7-+)) 17.Bc3 Nf8 18.h5 h6 19.Nf1 Ne6 20.Ng3 b5! 21.Nf5 (21.ab5 Ba3 Pinning) 21...Kf8 22.Nh6 (22.ab5 cb5 23.Qb2-+) 22...gh6 23.Bd2 (23.ab5 cb5 24.Bb5 Bd7 25.Bd7 Qd7-+) 23...ba4 24.Bc3 (24.Qc6 Ra7 25.Kd1 Ng5-+) 24...a3 25.Ba1 a2 26.Qc6 Qa5 (better 26...Ra3 27.Be2-+) 27.Kd1 (27.Qd6 Re7 28.Bc2-+) 27...Be7 (better 27...Qa3 28.Bc2 Rb8 29.f4 Rb1 30.Kd2 Ne4 31.Be4 de4 32.Qc3-+) 28.f4 (28.Qc1-+) 28...Ba6 (better 28...Bd7 29.Qc1 Rac8 30.Qc8 Rc8 31.Ke2-+) 29.Bf5 (29.Ba6 Ne4 30.Qc2 Qa6 31.Rg8 Kg8 32.f3-+) 29...Bc8 (29...Rec8 30.Qc2 Rc2 31.Bc2-+) 30.Ke2?? (30.Bd3 Bd7 31.Qc1 Rac8 32.Qc8 Rc8-+) 30...Ba6 31.Kf3?? (31.Kd1 Rec8 32.Qa6 Qa6 33.Rg2-+) 31...Nd8 (better 31...Rec8 32.Qa8 Ra8 33.Rd1-+) 32.Qa8 Be2!! 33.Kg2 (33.Ke2 Qa8 Discovered attack) 33...Qa8 34.Re1 Qa6 35.f3 Ne6 (35...Bb4 36.Kf2 Bd3 37.Bd3 Be1 38.Re1 Qd3 39.f5-+) 36.Kg3 Bd3 37.Bh3 Bd6 (37...Nh5 38.Kh2 Bh4 39.Reg1 Nef4 40.Bc3-+) 38.Kf2 Rb8 39.Kg3 Rb1 40.Kh4 Bb4 41.Rd1 Qc4 42.f5 Ng5 (42...Qc2 43.Rhg1 Qf2 44.Rg3 Be7 45.Rdg1 Rg1 46.Bg2 Ne4 47.Kh3 Qg3) 43.Bg2 Bc3 (43...Qc2 44.Kg3 Nf3 45.e4 Ne4 46.Kg4 Qg2 47.Kf4 Bd6 48.Ke3 Qe2) 44.Bc3 Qc3 45.Rb1 Bb1 (45...ab1R 46.Rb1 Bb1 47.Kg3 Qe1 48.Kh2 Qf2 49.Kh1 Nh5 50.f6 Nf3 51.Bf3 Ng3) 46.f4 a1Q (46...Qd2 47.fg5 Qg2 48.gf6 Qf2 49.Kg4 Bf5) 47.fg5 (47.Rf1 Bf5 48.Kg3 Qce1 49.Kh2 Ng4 50.Kg1 Nf3 51.Bf3 Qf1) 47...Qe3 48.gf6 (48.Bf3 Qf2 49.Kh3 Bf5 50.Bg4 Qh1) 48...Qg5 (48...Qad4 49.Be4 Qde4) 49.Kh3 Qc3 (49...Bf5 50.Kh2 Qf4) 50.Kh2 (50.Bf3 Qf3 51.Kh2 Qfh5) 50...Qgg3 51.Kg1 Qce3 (51...Qce1) 52.Kf1 Qgf2 (52...Bd3) 0–1. alessandrocarvalhaes (1735) – joueur3 (1835), lichess.org, 2019. (=1.a4 Nf6 2.b4 d5 3.Bb2 e6)

4.Bc3 =+.

4.Nf3 Bb4-/+ 5.g3 Nc6 6.Bg2 Qe7 7.0-0 Bd7 8.Na3 Bd6 9.c4 d4 (better is 9...0-0-/+) 10.Nd4? (10.Nb5 0-0 11.Nfd4 e5 12.Nd6 cd6= (worse is 12...Qd6 13.Nc6 Bc6 14.Ba3+/–)) 10...0-0?? (better is 10...Nd4 11.Bd4 Ba3-+) 11.Ndb5= a6 12.Nd6 Qd6 13.d4 Rfd8 14.d5 ed5 15.cd5 Ne5 16.Rc1 Bg4 (16...Re8 17.e4 Qb4 18.Qd4+/–) 17.h3 (17.Nc4 Nc4 18.Rc4 b5+/–) 17...Bf5 18.Nc4 Nc4 19.Rc4 b6 (19...c6 20.Rf4 Bg6 21.Bf6 gf6 22.Qb3+/–) 20.e4 Ne4? (20...b5 21.Bf6 gf6+/–) 21.Qd4?? (21.Be4 b5 22.Qd4 Qf6+-) 21...f6? (better is 21...Nf6=) 22.Be4+- Be4 23.Qe4 Re8 24.Qg2 Rad8 25.Rd1 a5 26.Rc6 Qe7 27.Kh2 h6 28.Qf3 Kh7?! 29.Qf5 Kh8 30.Rf6! gf6 31.Bf6 Qf6 32.Qf6 Kh7 33.Qf7 Kh8 34.Rd4 Rf8 35.Qc7 Rf2 36.Kg1 Rff8 37.Qb6 Ra8 38.Qh6 Kg8 39.Qg6 Kh8 40.Rh4 1–0. Salvatore – pieeater, ChessWorld.net, 2013.

5.c4 Be7 6.e3 dc4 7.Nf3 0-0 8.Bc4 c6 9.0-0 Nbd7 10.d4 Nb6 11.Be2 c5 (11...Bd7!?=) 12.Nbd2+= Bd7 (12...Nbd5 13.Rc1 b6 14.Nb3 cd4 15.Nbd4+=) 13.Rc1 Rc8 14.dc5 Bc5 15.Rc5 (15.Nc4!? Nc4 16.Bc4+=) 15...Rc5= 16.Ba3 Qc7 17.Bc5 Qc5 18.Qa1 Nbd5 (18...Rc8!?=) 19.Rc1+= Qb4 20.Rb1 Qe7 21.Nc4 Ra8 22.Rc1 h6 (22...Ne4 23.Qd4 Nef6 24.e4+/-) 23.h3 b6 24.Nce5 (24.Nfe5 Rb8+/-) 24...Be8 25.Nc6 Qd6 26.Qe5 Qe5 (26...Qa3 27.Rc4+=) 27.Nfe5+/- Rc8 28.Rd1 Kf8 29.Bf3 Nc3 30.Ra1 (30.Rd4 Bc6 31.bc6 Ke7+/-) 30...Nd7 (30...Nfd5 31.Bd5 ed5 32.Nd4+=) 31.Nc4 Nd5 32.Bd5 (32.Nd6!? Rc7 33.Rd1+/-) 32...ed5+= 33.Nd6 Rc7 34.Ne8 Ke8 35.Rd1 Nf6 36.Rd4 Kd7 37.f3 Kd6 38.e4 Kc5 39.e5 Nd7 (better 39...Ne8 40.Rg4 Rb7+=) 40.f4?? (40.Rf4 Rc6 41.bc6 Kc6 42.Rf7 Ne5 43.Rg7 Nc4+-) 40...Nf8 (better 40...Nb8! 41.Rd2 Nc6 42.Rc2 Kb4 43.Rc6 Rb7-+) 41.Rd1+/- Ne6?? Black intends d4 (better 41...d4 42.Rd4 Ne6+=) 42.g3 (42.Rc1) 42...g6?? (42...Kc4 43.f5 Nc5 44.Rd4 Kb3 45.Kg2=) 43.Kf2 (43.Rc1) 43...d4?? (43...Kc4 44.Ke3=) 44.Kf3?? (better 44.Nd4!? Kb4 45.Ne6 fe6 46.Rd6 Ka4 47.Re6 (47.Rb6?! Re7+/-) 47...Kb5 48.Rg6+-) 44...Kd5 (44...Kc4!?=) 45.g4+= Nc5?? (better 45...Kc5+=) 46.Rd4 Ke6 47.Rd6 1-0. BeepBeepImAJeep (2685) - mrsavic777 (2555), lichess.org, 2020.

5.e3 b6 6.c4 Bb7 7.Nf3 dc4 8.Bc4 Nbd7 9.0-0 Be7 10.d4 0-0 11.Nbd2 Rc8 12.Be2 c6 13.bc6 Bc6 14.Rc1 Bb7 15.Nc4 Nd5 16.Nfe5 Ne5 17.Ne5 Rc1 18.Qc1 Nf6 (18...Nb4!?=) 19.Nc6+= Qd7? (better 19...Bc6 20.Qc6 Nd5+=) 20.Bf3?? (better 20.Ne7 Qe7 21.Ba3+-) 20...Nd5 (20...Rc8!? 21.Ne7 Qe7=+) 21.Bd5+= ed5? (better 21...Rc8 22.Be6 Qe6+=) 22.Ne7+- Qe7 23.Ba3 Qd7 (23...Qd8 24.Bf8 Kf8 25.Qa3 Ke8 26.Qd3+-) 24.Bf8 Kf8 25.Qb2 Qa4 26.Qb6 Qd7 (26...Bc6 27.Qd8 Be8 28.Qd6 Kg8 29.Qd5+-) 27.Qa5 (better 27.Rc1 g6 28.Rc7 Qa4+-) 27...Bc6 (27...Kg8 28.Rc1 h6 29.Qb6+-) 28.Qc5 (better 28.Rc1 Ke7 29.Qc5 Qd6 30.Qc6 Qc6 31.Rc6 h5+-) 28...Ke8 29.Rc1 Bb7 30.Qb6 f6 1-0. BeepBeepImAJeep (2600) - JAMAISJEPAYE (2270), lichess.org, 2017.

5.e3 Bd6 6.c4 Nbd7 7.Nf3 c6 8.Be2 Qe7 9.0-0 e5 10.d4 e4 11.Nfd2 h5 12.h3 g5 13.Nc3 g4 14.h4 g3 15.fg3 Bg3 16.bc6 bc6 17.cd5 (17.Ba3 Qe6=+) 17...cd5 (17...Nd5 18.Nce4 Ne3=+ (18...Bh4 19.Ba3 Nb4 20.Bh5+-; worse 18...Qh4 19.Ng3 Qg3 20.Rf3+=)) 18.Ba3=+ Qe6 19.Nb5 Ng4 20.Bg4 (20.Qe1 Be1 21.Nc7 Kd8 22.Ne6 fe6 23.Rfe1 Ne3 24.Bd3-/+) 20...hg4-/+ (worse 20...Qg4 21.Bd6 Qd1 22.Rad1 Bd6 23.Nd6 Ke7 24.Nf7+=) 21.Rf4 (better 21.Qe1 Be1 22.Nc7 Kd8 23.Ne6 fe6 24.Rae1 Rh4 25.Rc1=+) 21...Qh6?? (21...Bf4 22.ef4 Kd8 23.Qc2=) 22.Nf1 (better 22.Nd6 Qd6 23.Bd6 Bf4 24.Bf4 Rh4 25.Qc1+-) 22...Bf4-/+ 23.ef4 Qh4 (23...Kd8 24.Qc1 Qb6+=) 24.Nd6= Kf8?? (better 24...Kd8 25.Nf7 Ke8 26.Nd6 Kd8 27.Nf7 Ke8 28.Nd6 Kd8 29.Nf7=) 25.Nf5+- Kg8 (25...Ke8 26.Nh4 Rh4 27.Ne3+-) 26.Nh4 Rh4 27.g3 (27.Qb3 Rh5 28.Ng3 Rb8+-) 27...Rh6 (27...Rh7 28.Rc1 Nf6 29.Be7+-) 28.Qg4 Kh7 (28...Rg6 29.Qh4 Bb7 30.Ra2+-) 29.Qf5 Rg6 (29...Kg8 30.Qg5 Rg6 31.Qd5+-) 30.Qd5 (better 30.Qf7 Rg7 31.Qh5 Kg8 32.Qd5 Rf7 33.Qa8 Nb6+-) 30...Rg7 (30...Raa6 31.Qf7 Rg7 32.Qh5 Rh6 33.Qa5 Bb7+-) 31.Qa8 1-0. BeepBeepImAJeep (2660) - tenemeelnene (2285), lichess.org, 2018.

5.e3 Be7 6.c4 0-0 7.Nf3 c5 8.Be2 b6 9.0-0 Bb7 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Nd4 dc4 14.Nc4 Nc5 15.Bf3 Bf3 16.Qf3 Na4 17.Ba1 (17.Nc6 Rc6 18.Qc6 Nb2 19.Nb2 Ba3+=) 17...Nc5 (better 17...Qd5 18.Nc6 Bd8=) 18.Nc6+/- Qe8 (better 18...Qc7+/-) 19.Rfd1?? (better 19.Nb6!? Rb8 20.Nb8 Qb8 21.Qc6+-) 19...Ncd7 (19...Nfd7 20.Qg4 (worse 20.Ne7 Qe7 21.Qg3 f6=+) 20...g6 21.Rd6=) 20.Nd6 (better 20.Bf6!? Nf6 21.Nb6+/- (21.Ne7?! Qe7 22.Nb6 Rc1 23.Rc1 Qb4=)) 20...Bd6= 21.Rd6 Nd5 (21...a4 22.Bf6 Nf6 23.Rd4+=) 22.Rd1 Nc5 (22...f5 23.Nd4 Ne5 24.Qe2+=) 23.Qg4 (better 23.Bg7 Kg7 24.R1d5+/-) 23...g6?? (23...f6 24.Nd4+=) 24.Qd4 (better 24.R6d5 f6 25.Rd6+-) 24...f6= 25.Rd5 (25.e4!? Nf4 26.Qc4=) 25...ed5=+ 26.Qd5 Kg7 27.h4 (27.Bd4 Nd7=+) 27...Qf7 28.Qf3 a4 (28...Rfe8 29.Rd6 Re6 30.Rd1-/+) 29.g4 (29.Rd6!?=+) 29...a3 30.g5 Qe6 (30...Kg8 31.gf6 Rce8 32.h5=+) 31.gf6 Rf6 (31...Kf7 32.Ne5 Ke8 33.f7 Rf7 34.Nf7 Qf7 35.Bf6-/+) 32.Qf4 (32.Nd8 Qf5 33.Qf5 gf5=) 32...Rcf8 (32...Kf7 33.Bf6 Qf6 34.Ne5 Kg7 35.Qf6 Kf6 36.Nc4=+) 33.Rd6-/+ Qd6?? (better 33...Kg8 34.Ne7 Qe7 35.Rf6 Rf6 36.Bf6 Qf8-/+) 34.Qd6+- Ne4 35.Qc7 (better 35.Qe7 Kh6 36.Bf6 Rf6 37.Qe4 a2+-) 35...R8f7 (35...Kh6 36.Bf6 Rf6 37.Ne5 Nf2 38.Qe7+-) 36.Qb6 Nd2 (36...Kh6 37.Bf6 Rf6 38.Qa7+-) 37.Qa5 (37.Nd8!? Nb3 38.Nf7 Na1+-) 37...Nf3 38.Kf1 Nh4 (38...Rd7 39.Bf6 Kf6 40.Qa3 Nh4 41.e4+-) 39.Bf6 Rf6 40.Qa3 Nf3 (40...Nf5 41.b6 Nd6 42.Qa7 Rf7 43.Nd8 Ra7 44.ba7+-) 41.Qe7 Rf7 42.Qd8 (better 42.Qf7! Kf7 43.b6 Ng5+-) 42...Nh2 (42...Rf8 43.Qc7 Rf7 44.b6 Nd2 45.Ke2+-) 43.Ke2 Ng4 (43...Nf3 44.Nd4 Nd4 45.Qd4 Kg8 46.b6+-) 44.Qd4 Nf6 45.b6 Kg8 (45...g5 46.Qc5 h6 47.Ne7+-) 46.Qd8 (46.Nd8 Rf8 47.b7 Ne4 48.b8Q Nc3 49.Kd3 Re8 50.Ne6 Kf7 51.Qg7 Ke6 52.Qbe5) 46...Kg7 47.Ne5 Rd7 48.Qd7 (48.Qd7 Nd7 49.Nd7+-; 48.Nd7 Nd7 49.Qd7 Kh6 50.b7 Kg5 51.b8Q Kh6 52.Qh2 Kg5 53.Qf4 Kh5 54.Qh7) 1-0. BeepBeepImAJeep (2665) - Taylanruzgar (2450), lichess.org, 2020.

5.e3 Be7 6.f4 0-0 7.Nf3 Nbd7 (7...Ne4 8.d3 Nd6 9.Nc3=+) 8.Be2 Ne4 9.0-0 b6 (9...c6 10.Nc3=) 10.Qc1 (10.Nd4 Bc5=) 10...Nd6 (10...Bb7 11.Bd4=) 11.Ba3 (11.Nc3 Bb7=) 11...Nf5 (11...Bb7 12.Nc3=) 12.Nc3 (12.Be7 Qe7 13.Nc3 Qf6=) 12...Ba3 (12...Bb4 13.Qb2 Ba3 14.Ra3=) 13.Qa3 (13.Ra3 Qf6=) 13...Nc5 14.Nd1 Bb7 15.Qb2 (15.d4 Ne4=) 15...Ne4 (15...Qd6 16.Nf2=) 16.c3 (16.d3 Nc5=) 16...Qe7 (16...Qf6 17.Ne5 Rad8 18.d3=) 17.Qc2 (17.Nd4 Qf6=) 17...Nh4 (17...c5 18.bc6 Bc6 19.Nf2=) 18.d4 (18.Nd4 Qf6=) 18...Nd6 (18...Rac8 19.Rb1=) 19.Bd3 (19.Nd2 Qf6=) 19...g6 (19...Nf3 20.Rf3 f5 21.Nb2=) 20.Rc1 (20.Nd2 Rad8+=) 20...Nf3= 21.Rf3 c6 22.Rh3 (22.Nb2 cb5 23.ab5 Rfc8=) 22...cb5 23.ab5 Bc8 24.g4 (24.Rg3 Bd7 25.Qa4 Rfc8=) 24...Bd7=+ 25.Qa4 Rac8 (25...Rfc8 26.Rg3=+) 26.Nb2 (26.Qb3 Rc7=+) 26...Kg7 (better 26...Qe8=+) 27.c4? (better 27.Qa3=+) 27...Rc7?? (better 27...Bb5 28.Qa3 dc4-+) 28.c5+= Rfc8 (28...bc5 29.dc5 (worse 29.Rc5 Bb5 30.Rb5 Nb5 31.Bb5 Qb4 32.Qb4 ab4=+) 29...e5 30.f5+-) 29.c6+- Be8 30.Nd1 Bc6 (30...f6 31.Rg3+=) 31.bc6 Qe8 32.Qa3 Rc6 33.Rb1 Qd8 34.Kf2 (34.g5 f6 35.gf6 Qf6+-) 34...Rb8 (34...h6 35.Ke1+=) 35.Nc3+- Qc7 (35...h6 36.Nb5+-) 36.Rb3 (36.Nb5 Nb5 37.Bb5 Rc2 38.Kf1 h6+-) 36...Rc8 (36...Nc4 37.Qa1+-) 37.Ne2 (37.Nb5 Rc2 38.Kf3 Nb5 39.Bb5 Rd2+-) 37...Rb8 (37...Nc4 38.Qa4+-) 38.Rb2 (38.f5 b5+-) 38...b5+= 39.Ra2 a4 (39...Ra6 40.f5+=) 40.Qb4 (40.g5 Nc4 41.Qb4 Qd6 42.Qd6 Nd6=) 40...Nc4= 41.Rg3 (41.g5 Qd6 42.Qb1 a3=) 41...Rbb6 (41...Qd6 42.Qd6 Rd6 43.e4=) 42.f5+= Kg8 (42...Qd6 43.Qd6 Nd6 44.fe6 fe6 45.h4+=) 43.Ke1 Rb7 (43...Qd6 44.Qd6 Rd6 45.Nc3+=) 44.fe6 (44.Nc3 Ne5 45.de5 Rc3+-) 44...fe6 (44...Re6 45.Bc4 dc4 46.Nc3+=) 45.h4 Kg7 46.h5 g5 47.Rf3 Nd6 (47...Qe7 48.h6! Kg8 49.Qe7 Re7 50.Nc3+-) 48.e4! Qe7 (48...de4 49.Be4; 48...Ne4 49.Qf8) 49.e5 Nc8 (49...Nc4!? 50.h6! Kg8 51.Qe7 Re7+-) 50.h6! Kg8 (50...Kh6 51.Rh3 Double attack (51.Bb5 Zwischenzug)) 51.Qd2 Na7 (51...Kh8 52.Ng3 Na7 53.Nh5+-) 52.Rf6 Kh8 (52...Rc8 53.Qg5 Kh8 54.Qd2+-) 53.Qg5 Rc8 54.Qg7! Qg7 55.hg7 Rg7 56.Re6 1–0. Gavritenkov,Sergei (2410) – Trubizin,Ivan (2190), Tula RUS, Efremenkov Mem, 2015.

6.c4 b6 7.Nf3 Bb7 8.Be2 Be7 9.0-0 0-0 10.d4 dc4 11.Nbd2 c3 12.Bc3 Nd5 13.Bb2 N7f6 (13...c5 14.bc6 Bc6 15.Qb3=) 14.Nc4 Bd6 15.Nd6 cd6 16.Ba3 (16.Rc1 Qd7=) 16...Rc8 17.Rc1 Nc3 18.Qd2 (18.Qe1!? Nfe4 19.Bd3=) 18...Nfe4-/+ (18...Na4? 19.Rc8 Qc8 20.Rc1+- (20.Bd6? Ne4 21.Qd3 Nd6-+); 18...Ne2?! 19.Qe2 Ne4 20.Nd2 Rc1 21.Rc1 Nd2 22.Qd2=) 19.Qb2 Na4 20.Qa1 Nac3 21.Bd3 Qf6 (21...f5-/+) 22.Bb2? (better 22.Rfe1!?=+) 22...Ng5-+ 23.Nd2? (better 23.Ne1 Nh3 24.Kh1 Nf2 25.Kg1 Nd3 26.Rf6 Ne2 27.Kh1 Nec1 28.Rf1-+) 23...Nh3 24.Kh1 Nf2 25.Kg1 Nh3! 26.Kh1 (26.gh3 Qg5 Double attack (26...Qh6 Decoy)) 26...Nf2 27.Kg1 Nh3 28.Kh1 (28.gh3 Qg5 Double attack (28...Qh6 Decoy)) 28...Qg5 29.Nf3 Qe3 30.Rc3 Nf2 (better 30...Rc3 31.Bc3 Qd3-+) 31.Kg1?? (better 31.Rf2 Qf2 32.d5 Rc3 33.Bc3-+) 31...Nd3 32.Kh1 Nf2 (better 32...Rc3!? 33.Bc3 Rc8 34.Bd2-+) 33.Kg1 Nh3 34.Kh1 Nf2 35.Kg1 Rc3 36.Bc3 (36.Rf2 Rc4 37.Qa3 Qa3 38.Ba3 Bf3 39.Rf3 Rd4 40.Rc3-+) 36...Ne4 37.Kh1 Nc3 38.Qc1 (38.Re1 Qd3 39.Rc1 Rc8-+) 38...Qc1 39.Rc1 Ne4 (39...Rc8 40.h4-+) 40.Rc7 (40.Ne1 Rc8 41.Rc8 Bc8-+) 40...Rc8 41.Rb7 (41.Rc8 Bc8 42.Kg1-+) 41...Rc1 42.Ne1 Re1 0-1. BeepBeepImAJeep (2660) - TayTay94 (2390), lichess.org, 2016.

6.c4 b6 7.Nf3 Bb7 8.Be2 Be7 9.0-0 0-0 10.d4 c6 11.Nbd2 (11.bc6 Bc6 12.Nfd2 Bb4+=) 11...dc4 (11...c5 12.cd5 Bd5 13.Rc1=) 12.Bc4 (12.bc6 Bc6 13.Nc4 Rc8+=) 12...cb5 (12...c5 13.Qc2=) 13.ab5 (13.Bb5 Rc8+=) 13...Rc8= 14.Qb3 (14.Qe2 Bb4=) 14...Bb4 (14...Ne4 15.Ne4 Be4 16.Rac1=) 15.Rac1 Nd5 (15...Qe7 16.Bd3=) 16.Ne4 (16.e4 N5f6 17.Rfe1 Rc7=) 16...N7f6= 17.Ng3 Qe7 (17...h5 18.Bd3=) 18.Ne5 Rfd8 (18...Bd6 19.e4 Nb4 20.Rfe1=) 19.Bd3 (19.h3 Bd6=) 19...Qd6 (19...Rc1 20.Rc1 (worse 20.Bc1 Ra8=+) 20...Ra8 21.Qa4=) 20.Bb1 (20.Ne2 Rc1 21.Rc1 Ne7+=) 20...Bd2 21.Rc8 (21.Nc4 Qb4 22.Qb4 Bb4+= (22...Nb4?? 23.Nd2 Bd5 24.Ba3+-)) 21...Rc8=+ 22.Qd3 (22.Ne4 Ne4 23.Be4 Qb4 24.Qb4 Bb4= (24...Nb4?? 25.Bb7 Rc2 26.Ba3+-; 24...ab4?! 25.Nd7=)) 22...Qb4 (22...Bc3 23.Bc3 Nc3 24.f3-/+) 23.Ba3 Qc3 24.Rd1 (24.Ne2 Qd3 25.Bd3 Nb4=+) 24...Qd3 25.Bd3 (25.Nd3?? Nc3 26.Rf1 Nb1 (26...Nb5?! 27.Bc1 Bc1 28.Nc1-+) 27.Rb1 Rc3-+) 25...Bb4 26.Bb2 a4 (26...Be7!?=+) 27.Ra1= Ra8 Black prepares a3 28.Ba3 (28.Nc4 Nd7=) 28...Ba3= 29.Ra3 Nb4 30.Be2? (better 30.Nc4 Nd7 31.Be4 Be4 32.Ne4=) 30...Nc2-+ 31.Ra2 a3 32.Nc4 Bd5 (32...Nd5!? 33.Rc2 a2 34.Ra2 Ra2-+) 33.Rc2 a2 34.Ra2 Ra2 35.Nb6 Ra1 36.Nf1 Bb7 (36...Rb1 37.h4=+) 37.f3 (37.Bd3 Ra3 38.Be2 Ne4-/+) 37...Ne8 38.Kf2 (38.Nd7 Nd6=+) 38...Nd6-/+ 39.Nd7 Rb1 40.Nc5 Bc8 (40...Ba8 41.e4-/+) 41.Nd2=+ Rb2 42.Ncb3 (42.Ke1!?=+) 42...Bd7-/+ 43.b6 Ba4 44.Nc5 Bc6 45.Ndb3 Bd5 (45...Bb5 46.Nc1-/+) 46.Na5 Rb6 47.e4 Ba8 48.e5? (better 48.Nab3!?=+) 48...Nf5-+ 49.Nc4 Rb8 50.Na6 (50.Bd3 Nd4 51.Nd7 Rb3-+) 50...Rd8 51.Nb6 (51.Nc7 Bc6-+) 51...Nd4 52.Nc7? (52.Bd3 Nc6 53.Be4 Nb8-+) 52...Bb7 (better 52...Ne2 53.Nca8 Nf4-+) 53.Nc4 (53.Bf1-+) 53...Ne2 54.Ke2 (54.Nd6 Nf4 55.Nb7 Rd7 56.Ne6 Nd3 (56...Rb7?! 57.Nf4 g5 58.Nd3-/+) 57.Ke2 fe6-+) 54…Rc8 0–1. Timmermans,Mark (2385) – Dong Bao Nghia (2225), Titled Tuesday, 2021.

6.d4 Bb4 7.c3 Bd6 8.Ba3+=.

6.d4 Nb6 7.Nd2 c6 8.bc6 bc6 9.Ngf3 c5 10.Ba3 (10.Bb5 Bd7=) 10...c4 11.Bf8 Kf8 12.Ne5 Nfd7 (12...Bd7 13.c3=) 13.f4 (13.Ng4 f5 14.Ne5 Ne5 15.de5 Bd7+=) 13...Ne5+= 14.fe5 Bd7 Attacks the isolani on a4 15.c3 Qe8 Increasing the pressure on the isolated pawn on a4 (15...Kg8 16.e4+=) 16.Be2 Na4 (16...Ba4 17.Qb1 Rb8 18.0-0=) 17.Qc1 Ke7 (17...f5!?=) 18.Qa3+= Kd8 19.0-0 (better is 19.Bd1!? Nb6 20.Qc5+=) 19...Qe7+= 20.Qc1 Kc7 (20...Qg5 21.Nf3 Qh6 22.Qd2+=) 21.Bd1 (21.Qc2 Nb6+=) 21...Nb6= 22.Qb2 (22.e4!?=) 22...Rhb8+= 23.Qc2 g6 (23...f5 24.ef6 gf6 25.e4+=) 24.Nf3 (24.e4 Kd8=) 24...a4 25.h4 (25.e4 Kd8+=) 25...h6 26.Qf2 a3 (26...Kd8 27.Nd2-/+) 27.Nh2+= Be8 28.Ng4 Na4 29.Ba4= Ra4 30.e4 Rb2 31.ed5 Rf2-/+ 32.d6 Kd7 33.de7 Rb2 34.d5? Re2?? 35.d6+- Re4?? 36.Nf6 (36.Nf6 Kc6 37.Ne8+-) 1–0. Tappenbeck – Van Boemmel,Gerald, Sueder Sommer op, 1996.

6.Nf3 c6 7.c4 Bd6 8.Be2 0-0 9.d4 Ne4 (9...dc4 10.Nbd2=) 10.0-0 (10.c5 Bc7+=) 10...f5 (10...cb5 11.c5 Bc7 12.ab5+/-) 11.Nc3 Qf6 (11...dc4 12.Qc2+=) 12.bc6 (12.Qc2!?+=) 12...bc6= 13.cd5 ed5 14.Rc1 Qh6 15.Ne4 fe4 16.Ne5 Ne5 17.de5 Be7 18.Bg4 Rb8 (18...Qg6 19.Bh5 Qh6 20.h3=) 19.Bc8+= Rfc8 (19...Rb2? 20.Bd7 Rbf2 21.Rf2 Qe3 22.Qd2+-; worse 19...Rbc8 20.Qg4+=) 20.Bd4 (20.Qg4!?+=) 20...Qe6=+ 21.Qd2 Bb4 22.Bc3 (22.Qe2 c5 23.Bb2 c4=+) 22...c5 (better 22...Bc3 23.Qc3 Rb4=+) 23.Qd1? (better 23.Rfd1=+) 23...Bc3-+ 24.Rc3 Qe5 25.Qd2 (25.Qa1 Qe6-+) 25...d4 (25...c4 26.Rd1-+) 26.Rc4 (26.Rcc1 d3 27.Qa5 Qd5-+) 26...d3 27.Qa5 Qd5 28.Rcc1 d2 Black intends c4 29.Rcd1 Rb2 30.Qa6?? (30.Qc3 Rcb8 31.f3 ef3 32.e4 Qe4 33.Rd2 fg2 34.Rfd1 Rd2 35.Qd2 Qa4 36.Qd5 Kh8 37.Qd8 Qe8 38.Qe8 Re8 39.Kg2-+) 30...Rd8 (30...Ra8 31.Qe2 c4 32.f3 ef3 33.Rf3-+) 31.f3 (31.Qa5 c4 32.Qc3 Ra2-+) 31...c4 (31...ef3 32.Rf3 c4 33.Rg3-+) 32.fe4 Qe4 33.Kh1 (33.Qa7 Qe6 34.Qc5-+) 33...h6 (33...c3 34.Qe2 h6-+) 34.Rf4 (34.Qa5 Qd3 35.Qc7 Kh8-+) 34...Qc2 (34...Rb1 35.Rff1 Rd1 36.Rd1 Qg4-+) 35.Qc4 (35.Rff1 c3 36.Qe6 Kh8 37.Qg4-+) 35...Qc4 36.Rc4 Rb1!! (36...Rb1 37.Kg1 Rd1 38.Kf2 Rc1 39.Rb4 d1Q 40.Kg3 Qe1 41.Kf3 Qb4 42.h4 Rf8 43.Kg3 Rh1 44.e4 Qe4 45.a5 Qh4) 0-1. Lance5500 (2655) – chessbrahs, lichess.org, 2016.

6.Nf3 Bd6 7.d3 (7.d4 0-0=) 7...0-0 8.Nbd2 Re8 (8...Rb8 9.Be2=) 9.Be2= e5 10.0-0 c5 11.c4 e4 12.de4 (12.Ne1 Qc7 13.Kh1 dc4 14.Nc4 Bh2=) 12...de4+= 13.Ng5 (13.Ne1 Qc7 14.h3 Ne5+=) 13...Qc7 14.h4 h6 15.Nh3 Nf8 (15...Ne5 16.Nf4+=) 16.f4 (16.Bf6 gf6 17.Bg4=) 16...Ng6 (16...ef3 17.Rf3 Ng4 18.e4+=) 17.Qe1 (17.Nf2!? Qe7 18.Bf6 gf6 19.h5 Nf4 20.Nfe4=) 17...Ng4 (17...Bh3 18.gh3 Qe7 19.h5=) 18.h5 (better is 18.Ra3=) 18...Nf8 (better is 18...Ne3 19.hg6 Nf1 20.Bf1 Bh3 21.gh3 f5+= (21...fg6?! 22.Ne4 Re6 23.Bg2=)) 19.Qg3+/– f5 20.Nf2 (better is 20.Bg4 fg4 21.Nf2+/–) 20...Ne3+= 21.Qe3 Bf4 22.Qc3 Be5 23.Qb3 Bb2 24.Qb2 e3 25.Nh3 ed2-/+ 26.Qd2 Be6 27.Nf4 Rad8 28.Qc2 Rd4 29.Ne6 Ne6 30.Qf5 Rh4 31.Bf3 Qh2-/+ 32.Kf2 Nf4 33.Rh1?? Re2! 34.Be2 Qg2 (34...Qg2 35.Ke1 Qe2) 0–1. Miras,Eduardo – Grau,Jose Maria, Asturias Asturias.Pref, 1995.

5.c4 ab5 6.cb5 Bb4 7.Nc3 0-0 8.Nf3 c6 9.e3 c5 10.d4? (10.Qc2 Nbd7=+) 10...cd4 (10...Qa5 11.Qc2 Ne4 12.Rc1 Qa4 13.Nd2 Nc3 14.Bc3 Qc2 15.Rc2 Bc3 16.Rc3-+) 11.ed4? (better 11.Qd4!? Qd6 12.Be2=+) 11...Ne4-+ 12.Qb3 Qa5 13.Rc1 Nd7 (better 13...Qa4! 14.Qa4 Ra4-+) 14.Bd3=+ Nc3 15.Bc3 Bc3 16.Qc3 (16.Rc3? e5 17.Bc2 e4-+) 16...Qc3 17.Rc3 Ra4 18.0-0 h6 19.Rfc1 Nb6 20.Rc7 g6 21.Ne5 Kg7 (better 21...Rd4!? 22.g3 g5=+) 22.Ng6 Rd8 23.Ne7 (23.Ne5!? Rf8 24.Nf3+/-) 23...Bd7 24.Rb7 Nc8?? (better 24...Rd4 25.Nc6 Bc6 26.Rb6 Be8=) 25.Nc8 Rc8 26.Rc8 Bc8 27.Rc7 Ra1 28.Bf1 Ra8 29.b6 Rb8 30.h3 Kf6 31.Bb5 e5 32.Bc6 White prepares b7 32...ed4 33.b7 Bb7? (better 33...Be6+/-) 34.Rb7+- Rc8 (34...Rd8 35.Kf1 Ke6 36.Rb5+-) 35.Bd5 d3 36.Bb3 (better 36.Rf7 Ke5 37.Rd7 Rc5+-) 36...d2?? (36...Rc3 37.Kh2 d2 38.Rf7 Kg6 39.Rd7 Rb3 40.Rd2+-) 37.Kh2 (37.Rf7 Ke5 38.Rd7 Rc1 39.Kh2 Rc3+-) 37...Rc1?? (better 37...Rc3 38.Rf7 Kg6+-) 38.Rb6 (better 38.Rf7 Ke5 39.Rd7+-) 38...Ke7+= 39.Rb5 (39.Rb5 Rb1 40.Rd5 Rb3 41.Rd2+=) 1-0. TimC (2210) - Silent_Bluntman (2190), Rated Bullet game, lichess.org, 2015.

5.Nf3 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 Be7 9.e3 0-0 10.Be2 Nbd7 11.0-0 b6 12.d3 Bb7 13.Nbd2 Qc7 14.Qc2 Ra8 15.Bb2 Ne8 16.Ra1 Ra1 17.Ba1 g6 18.h3 Bf6 19.Bf6 Nef6 20.d4 cd4 21.Nd4 Kg7 22.cd5 Qc2 23.Nc2 Nd5 24.Bf3 f5 25.Nb4 Nc5 26.Bd5 ed5 27.Nf3 Kf6 28.Nd4 Ke5 29.Kf1 Kd6 30.Ke2 Bc8 31.Na2 Na4 32.Kd2 Bd7 33.Nc3 Nc3 34.Kc3 Kc5 Attacks the isolani on b5 35.h4 ½–½. Degterev,Pavel (2275) – Martys,Mark (2290), CP–2005–S–00006, 2008.

5.Nf3 Bd6 6.e3 0-0 7.c4 c6 8.Be2 Qc7 (8...ab5 9.cb5 c5 10.0-0=) 9.cd5 (9.Bf6 gf6 10.cd5 cd5=) 9...Nd5 10.Nc3 Nc3 11.Bc3 e5 12.Qb1 ab5 13.ab5 Ra1 14.Qa1 f6 15.d4 ed4 16.Bd4 (worse is 16.ed4 Re8-/+) 16...cb5 17.0-0 b4 18.Rc1 Nc6 19.Bc5 Be6 20.Bd6 Qd6 21.Rd1 Qc5 22.Rc1 Qb6 23.Bc4 (23.Qb1 Qa5=) 23...Bc4+= 24.Rc4 Rd8 25.h3 b3 26.Qb1?? (better is 26.Rc1+=) 26...b2-+ 27.Nd4 Ra8 (27...Nd4 28.ed4 Ra8 29.Kh2-+) 28.Nc2 Qb3 29.Rc5 Qa2 (29...Qa2 30.Qa2 Ra2-+) 0–1. Carzolio,Luigi (2035) – Napoli,Nicolo (2125), Salsomaggiore Terme op 8th, 2004.

5.g3 Nbd7 6.Bg2 Nc5 7.d3 Bd7 8.c4 Be7 9.Nd2 0-0 10.Ngf3 dc4 11.dc4 ab5 12.ab5 Ra1 13.Qa1 b6 14.0-0 Ne8 15.Bg7?? (better is 15.Rd1+=) 15…Ng7-+ 0–1. Jokmin,Alex – Zimmermann,Jan Erik, ZN–2010-0-01125, 2010.

5.Ba3 Bd6 6.Bd6 Qd6 7.c3 d4 8.cd4= Qd4 9.Nc3 Bb7 10.e3 Qd6 11.Nf3 0-0 12.Be2 Nbd7 13.d4 Rad8 14.Qc2 Nd5 (14...c5 15.bc6 Qc6 16.Rc1=) 15.Bd3 (15.Nd5!? Bd5 16.e4+=) 15...Nc3= 16.Qc3 Bf3 17.gf3 Nf6 (17...e5 18.Be4=) 18.Qc2 (18.Rc1 Nd5 19.Qc4 Qe7=) 18...Qb4 (18...e5 19.de5 Qe5 20.0-0=) 19.Ke2+= Rfe8 20.Rhg1 (20.f4 Re7+=) 20...e5= 21.de5 Re5 22.Rab1 (22.Qc7 Red5 23.Rgd1 R8d7=) 22...Qd6 (22...Qe7 23.Rbc1 Rc5 24.Qb2=+) 23.f4 (23.Rbd1 Qe7=) 23...Rc5=+ 24.Qb2?? (better 24.Qb3=+) 24...Qd3-+ 25.Kf3 Rc2 26.Qf6 (26.Rg7 Kg7 27.Rg1 Kf8 28.Qb4 Rd6-+) 26...Qe2 27.Ke4 Re8 28.Kd4 (28.Qe6 Re6 29.Kf5 Rc5) 28…Qc4 (28...Qd2) 0–1. TWW_LONDON (1830) – Winggo (1840), lichess.org, 2021.

5.e3 a5 6.c4 Bb4 7.Nf3 dc4 8.Bc4 Kf8 (8...0-0!?=) 9.0-0+= Ke7 10.d4 Re8 11.Nc3 Kf8 12.Ne5 Kg8 13.Be2 Bc3 14.Bc3 Nbd7?? (14...Nd5 15.Bd2+/-) 15.Bf3 (better 15.Nc6 Nd5 16.Nd8 Nc3+-) 15...Ne5? (better 15...Nd5 16.Nc6 Qf6+/-) 16.Ba8+- (16.de5?! Nd5+/-) 16...Nc4 17.Bf3 Bd7 (17...Nd6 18.Qc2+-) 18.Qb3 (18.Rc1 Nd6+-) 18...Nd6 19.Rac1 Qe7 (19...Bc8 20.Qc2+-) 20.Bb2 Rc8 21.Ba3 Qf8 (21...e5 22.de5 Qe5 23.Rfd1+-) 22.Rc2 (better 22.e4 Qd8 23.e5+-) 22...Nfe4 (22...Qe8 23.Rfc1 Qd8 24.Qd3+-) 23.Rfc1 (better 23.Be4!? Qd8 24.Bd3 Ne8+-) 23...Nf6 (23...Qd8+-) 24.Rc7 Rc7 25.Rc7 Qd8 26.Bd6 Ne8 27.Rd7! Qd7 (27...Qd7 28.Be5 Combination) 28.Bg3 Nd6 (28...Qc8 29.Bc6 Nf6 30.Qa3+-) 29.h3 (better 29.d5 Nf5 30.de6 fe6+-) 29...Nb7 (29...Nf5 30.Be5 Qc8 31.d5+-) 30.Bc6 (30.Qc2!? Nd6 31.Qc6 Qc6 32.bc6 Nc8+-) 30...Qc7 (30...Qe7+-) 31.Bc7 1-0. BeepBeepImAJeep (2680) - Thom2017 (1765), lichess.org, 2017.

5.e3 Bb7 6.Nf3 Bd6 7.Be2 e5 8.Ne5+- Be5 (8...0-0 9.0-0+-) 9.Be5 d4 (better 9...0-0!?+-) 10.Bf3+- de3?? (10...Bf3 11.Qf3 (11.gf3?! c5+=) 11...Nbd7 12.Bc7+-) 11.fe3 (better 11.Bb7 Nbd7 12.Bc7 (worse 12.Ba8 Ne5 13.Bf3 ef2 14.Kf1 0-0+-) 12...Qc7 13.Ba8+-) 11...Bf3 (11...Ne4 12.0-0 (12.Bg7?! Rg8 13.Be5 Rg2+-) 12...0-0 13.d3+-) 12.Qf3 (12.gf3?! a6+-) 12...Nbd7 13.Bb2 (better 13.Bc7 Qc8 14.Nc3+-) 13...Qe7?? (13...a6!?+-) 14.0-0 (better 14.Qa8 Qd8 15.Qa7+-) 14...0-0 (14...Rc8 15.Qb7 Qd8 16.a5+-) 15.c4 (better 15.Ba3 Qe4 16.Bf8 Qf3 17.Rf3 Kf8 18.a5+-) 15...Rfe8 16.Nc3 (better 16.Qf4!?+-) 16...Qb4+= 17.Rab1 Qc4 18.Nd5?? (better 18.Rbc1+=) 18...Rac8?? (better 18...Qd5 19.Bd4 Qf3 20.gf3 Nd5-+) 19.Nf6 Nf6 20.Bf6 gf6 21.Qf6 Qe6 22.Qb2 (22.Rbc1 Qf6 23.Rf6 Re4+-) 22...Rcd8 (22...c5 23.Rf3+-) 23.Rf3 Qe5 (23...c5 24.bc6! Qc6 25.Rg3 Kf8 26.Rf1+-) 24.Rg3 Kf8 25.Qc2 (25.d4!? Qe4+-) 25...Qe4 26.Qc3?? (26.Rc1 Qc2 27.Rc2 Re7+-) 26...Qe5 (better 26...Qb1 27.Kf2 Rd3 28.Qg7 Ke7 29.Qg5 f6 30.Qg7 Kd8 31.Qf6 Kc8-+) 27.Qe5 (27.d4!? Qe4 28.Rf1 Re7+-) 27...Re5 28.d4 Re4 (28...Re7 29.Rh3+-) 29.Rc1 Rde8 (29...Re7 30.Rc6+-) 30.Kf2 (30.Rc7 Re3 31.Re3 Re3 32.Ra7 Rd3+-) 30...R8e7 31.Rf3 Ke8 32.Rc3 h5 33.h4! R7e6?? (33...Rh4 34.Rf6 Combination) 34.g3 Rg6 (34...Re7+-) 35.Rf4 (35.Rc7 Re7 36.Rc8 Kd7+-) 35...Rg4?? (better 35...Rf4 36.ef4 Kd7+-) 36.Re4 Re4 37.Rc7 Re7 (37...Re6+-) 38.Re7 Ke7 39.Kf3 Kf6 40.Kf4 Kg6 41.e4 f6 42.e5 fe5 43.Ke5 Kf7 44.Kf5 (better 44.d5 Ke7 45.d6 Kd7+-) 44...Ke7 45.Kg5 (45.g4 hg4 46.Kg4 Ke6+-) 45...Kf7 (45...Kd6 46.g4 hg4 47.Kg4+-) 46.Kh5 Ke6 47.Kg5 Kd5 48.h5 Kd4 49.h6 Kc4 50.h7 Kb4 51.h8Q Ka4 52.Qb2 Ka5 (52...a5 53.ba6 b5 54.a7 Ka5 55.a8Q Kb6 56.Qd4 Kc7 57.Qdd8) 53.Kf5 (53.Qb3 a6 54.g4 ab5 55.Qa3) 53...Ka4 54.g4 Ka5 (54...a5 55.ba6 b5 56.a7 Ka5 57.a8Q Kb6 58.Qd4 Kc7 59.Qdd8) 55.g5 (55.Qb3 a6 56.g5 ab5 57.Qa3) 55...a6 (55...Ka4 56.g6 a5 57.ba6 b5 58.a7 Ka5 59.a8Q Kb6 60.Qd4 Kc7 61.Qdd8) 56.g6 (56.g6 Ka4 57.ba6 b5 58.a7 Ka5 59.a8Q Kb6 60.Qd4 Kc7 61.Qdd8; 56.Qb3 ab5 57.Qa3) 1–0. KLINGON09 (1795) – zahorsko (1795), lichess.org, 2020.

5.e3 c5 6.Nf3 Nbd7 (6...Bd6 7.Be2=) 7.Be2 Bd6+= 8.0-0 Qc7 (8...0-0 9.d3=) 9.g3 (9.a5 0-0=) 9...0-0+= 10.Ng5 (10.d4 a6+=) 10...e5 (10...h6 11.Nh3+=) 11.f4+= h6 (11...e4 12.a5+=) 12.Nh3 d4 (12...a6 13.fe5 Be5 14.Be5 Ne5 15.Nf2+=) 13.Na3= de3 (13...Re8 14.a5=) 14.de3 (14.Nc4 Rd8=) 14...ef4 (14...e4 15.Qd2+=) 15.ef4 (15.Nc4 Be5 16.Ne5 Ne5 17.Nf4 Bb7=) 15...Be7 16.c4 (16.Re1 Re8=) 16...Rd8 (16...Bb7 17.Bf3+=) 17.Qc2 (17.Bf3 Bb7=) 17...Bb7 18.Nf2 (18.Rae1 Re8=) 18...Ne8 (18...Re8 19.Rad1=) 19.Ng4 Nef6 (19...Nd6 20.Bf3=) 20.Qc3 (20.Rae1 a6=) 20...Nf8 (20...a6 21.Rae1=) 21.Nc2 (21.Qe3 Ng4 22.Bg4 Ng6=) 21...Ne6 (21...a6=) 22.Nce3 (22.Qe3 Ne4=) 22...Ne4 (22...Nd4!? 23.Rae1 Ne4-/+ (worse is 23...Ne2 24.Re2 Be4 25.Rfe1+/–)) 23.Qe1+= Nd4 24.Rd1 Rd6 25.Nd5-/+ Rd5 26.cd5 Nc2 27.Bf3 Ne1 28.Be4 Bd6 29.Rfe1 a6 30.Ne5 ab5 31.ab5 f6 32.Nc4 Bc8 33.Ra1 Ra1-/+ 34.Ra1 Bd7 35.Ra8-/+ Kf7 36.Ne3? Bb5 37.Nf5 c4?? 38.Nd6+- Qd6 39.Ba3 (39.Ba3 Bc6 40.Bd6 Ba8 41.Bc7+-) 1–0. Norbeck,Ivar – Bengtsson,Torsten, corr SSKK 2–61, 1985.

5.e3 Bd6 6.Nf3 =.

5.Nf3 Nbd7 6.e3 Bd6 7.Be2 Rf8 (7...a6!?=) 8.0-0+= h6 9.a5 e5 (9...ba5 10.Bc3+=) 10.d3 (better is 10.d4 e4 11.Ne5+/–) 10...Nb8? (better is 10...Qe7!?+=) 11.Ne5 Nbd7?? (better is 11...ba5 12.c4 a6 13.Ra5 c5+-) 12.Nc6 Bh2 13.Kh2 Ng4 14.Bg4 Qh4 15.Bh3 Nb8 16.Nb8 Rb8 17.Qf3 g5 18.Qf6 Rg8 19.Qc6 Bd7 20.Qd7 Kf8 21.Qc7 Re8 22.Qd6 Re7 23.Bf6 (23.Bf6 Rg7 24.Qe7 Kg8 25.Qd8 Kh7 26.Qf8 Qf4 27.ef4 Kg6 28.Qg7 Kh5 29.Qf7 Kh4 30.g3) 1–0. Stummerer,Alfred (2190) – Popiak,Detlef (2060), remoteschach.de, 2006.

5.Nf3 Be7 6.e3 c5 (6...0-0 7.Be2=) 7.bc6 (7.Be2 0-0=) 7...Nc6 8.Be2 0-0+= 9.0-0 Bb7 10.d3 (10.Ba3 Ba3 11.Na3 Ne4=) 10...Qc7 (10...Rc8 11.Na3+=) 11.Na3 a6 12.c4 Rfd8 13.Rc1 Rac8 14.cd5 Rd5 (14...Nd5 15.Nc4=) 15.Nd4 (15.Qb3 Rh5=) 15...Rc5 (15...Qd8 16.Nc6 Rc6 17.Rc6 Bc6=) 16.Nc6 (16.Rc5 Bc5 17.Nc6 Qc6=) 16...Qc6+= Threatening mate... how? (16...Bc6?! 17.Rc5 Bc5 18.Bf6 Ba3 19.Bg7=; 16...Rc6?! 17.Rc6 Bc6 18.Qb3+=) 17.e4 h6 (17...Rc1!? 18.Bc1 Qc7+=) 18.Nc4= Qc7 19.Bd4 Rc6 20.Qb3 Nd7 21.Qb2 Bf6 22.f4?? (better is 22.Bf6 Nf6 23.Rc3=) 22...Bd4-+ 23.Qd4 b5 24.ab5 ab5 25.Kh1 (25.e5 Rc5-+) 25…bc4 (25...bc4 26.dc4 Nb6-+) 0–1. Bizunowicz,Stanislaw – Pajor,Mieczyslaw, corr, 1978.

5.Ba3 b6 6.e3 Be7 7.d3 a5 (7...a6 8.d4=+) 8.Nd2 0-0 9.Ngf3 Re8 10.Be2 Bb7 11.Ne5 Qc7 12.Ndf3 Nbd7 Black prepares c4 13.d4 (13.Bb2 Bd6 14.Nd7 Nd7=+) 13...Bd6 14.Nc6 (14.Nd7 Nd7 15.0-0=+) 14...c4 (better 14...Ne4!?-/+) 15.Bd6=+ Qd6 16.Nfe5 Ne5?? (better 16...Bc6 17.Nc6 Nb8 18.Nb8 Reb8=) 17.de5+- (worse 17.Ne5 Ne4 18.Qb1 f6-/+) 17...Qc5 18.ef6 Bc6 19.bc6 Qc6 (19...gf6 20.Rb1+-) 20.0-0 (20.fg7 Rad8+-) 20...g6 (20...gf6 21.Bh5+-) 21.c3 (21.Qd2 Rad8+-) 21...Rab8 (21...Rad8 22.Rb1+-) 22.f4 (22.Qd2 Red8+-) 22...b5 23.ab5 Qb5 (better 23...Rb5 24.Qd4 Qc5+-) 24.Qa4 (24.Qd4 Rec8+-) 24...Qa6?? (better 24...Qb2 25.Rf2 Qc3+=) 25.Rfb1 (25.Qa5 Qb7+-) 25...Rec8 (25...Rb1 26.Rb1 Ra8 27.Kh1+-) 26.Rb8 Rb8 27.Qa5 Qa5 28.Ra5 h5 29.h3 (29.Kf2 Rb3+-) 29...Rb3 30.Ra8 Kh7 31.Rf8 Rc3 (31...Rb7 32.e4!+-) 32.Rf7 Kg8 33.Rc7 (better 33.Rg7!? Kf8 34.Rg6 Rb3 35.Bh5 Rb7+-) 33...Kf8? (33...Re3 34.Kf2 Re4 35.g3+-) 34.f7 (34.e4 Rb3+-) 34...Rc2? (34...Re3 35.Bf3 Rb3+-) 35.Kf2 Rb2 36.Kf3 Rb4 37.g4 c3 (37...Rb2 38.gh5 gh5 39.h4+-) 38.Rc3 (38.Bd3!? hg4 39.hg4 Ra4+-) 38...Kf7 39.Rc7 Kf8 40.gh5 gh5 41.Kg3 Rb2 (41...Rb3 42.Kf2 Rb2+-) 42.Rh7 (better 42.Bh5 Rb3 43.Kf2+-) 42...Re2+- 43.Rh5 (better 43.Kf3!? Ra2 44.Rh5+-) 43...Re3= 44.Kg4 d4 45.Rh8 (45.Re5 Kf7=) 45...Ke7 46.Rh7 Kd6 47.Rh5 (47.Rh8 e5=) 47...d3-/+ 48.Rh6?? (better 48.Rh8-/+) 48...d2-+ 49.Rh8 Ke7 (49...d1Q 50.Kg5 Qd5 51.Kh6 Rh3 52.Kg7 Qd4 53.Kg6 Rg3 54.Kf7 Qg7 55.Ke8 Qe7) 50.Rh7-+ Kd8 51.Kg5 d1Q 52.Rh8 Kc7 53.h4 Qd5 (53...Rg3 54.Kf6 Qd4 55.Ke7 Qd7 56.Kf6 Kd6 57.Rh7 Qd8 58.Kf7 Qe7) 54.Kg4 (54.Kh6 Rh3 55.Rh7 Kd6 56.f5 Rh4 57.Kg7 Rg4 58.Kf8 Qa8 59.Kf7 Qg8 60.Kf6 Qd8 61.Kf7 Qe7) 54…Qf5 0–1. TWW_LONDON – yeoh63, lichess.org, 2021.

5.c4 d4 6.e3 e5 7.ed4 cd4 8.d3 (8.Qe2 e4 9.f3 Bb4 10.fe4 0-0=) 8...Bb4-/+ 9.Nd2 e4 10.de4 (10.Qb3 Qa5 11.0-0-0 e3 12.fe3 de3-/+) 10...Ne4 11.Ngf3? (11.Bc1 Qe7 12.Qe2 Bf5-+) 11...0-0 (11...Bg4 12.Be2 Bf3 13.Bf3 Nd2 14.Qe2 Qe7 15.Qe7 Ke7 16.Bb7 Nc4 17.Ke2 Nb2 18.Ba8 d3 19.Kf3-+) 12.Be2? (12.Bd3 Nd2 13.Nd2 Qg5-/+) 12...Nd2?? (better 12...d3 13.Qb3 Bd2 (13...de2?! 14.Qb4 a5 15.Qb3 Nd2 16.Nd2=) 14.Nd2 Re8 (14...de2?! 15.Ne4 Bg4 16.f3+=) 15.Qd3 Qd3 16.Bd3 Ng3 17.Ne4 Ne4-+ (17...Nh1?! 18.Kd2-/+; worse 17...Re4 18.Be4 Ne4 19.0-0-0+/-)) 13.Nd2-/+ d3 14.Bf3 Re8 (14...Qg5!? 15.Qc1 Bg4 16.Bg4 Re8 (16...Qg4?! 17.0-0=+) 17.Kf1 Qg4-+ (17...Bd2?! 18.Qd1-+; 17...Qd2 18.Qd2 Bd2 19.Bf5+/-)) 15.Kf1-/+ Nd7 16.Ne4 Ne5 17.Be5 Re5 18.c5? (18.Rb1!? Ba5 19.Nd2-/+) 18...Bf5 (18...Qd4!? 19.c6-+) 19.Nd6 Qf6 (19...d2 20.Be2 Qh4 21.Nf5 Rf5 22.g3 Qh3 23.Kg1 Bc5 24.Qf1 Rf2 25.Qf2 (25.Qh3 Re2 26.Kf1 Rf2 27.Kg1 Re8 28.Qc8 Rc8 29.h3 Re8 30.Rf1 Re1 31.Re1 de1Q) 25...Bf2 26.Kf2 Qf5 27.Bf3-+) 20.Nf5 Qf5 21.Qb3? (better 21.g4 Re1 22.Kg2 Rd1 23.gf5 Ra1 24.Ra1 Bc5 25.Rd1-/+) 21...Ba5 (21...Bc5 22.Re1 Rae8 23.Re3 Be3 24.Qd1 Bf2 25.g4-+) 22.Rd1 (22.Bb7 Rae8 23.Qd1-+) 22…Rae8 (22...Rae8 23.Qb1 d2 24.Be2 Re2 25.f3 Qc5 26.Qh7 Kh7 27.Rd2 Qf2) 0-1. BeepBeepImAJeep (2745) - Sumicat (2765), lichess.org, 2020.

5.c4 d4 6.h3 e5 7.d3 Bf5 8.e3 Nbd7 (8...Bd6 9.g4 Bc8 10.Bg2+=) 9.Nf3 (9.Qf3!? Be6 10.Qb7 Qa5 11.Nd2=) 9...de3 10.fe3 e4 11.de4 Be4 12.Bd3 Be7 13.0-0 Nb6 (13...0-0 14.Ra3 Qc7 15.Nbd2 Bd3 16.Rd3=) 14.Be2 0-0 15.Nc3 Qd1 16.Rfd1 Bf3 (16...Bc2!? 17.Rdc1 Bf5+=) 17.gf3+/– Rfd8 18.a5 Nbd7 19.Nd5 Nd5 20.cd5 Bf6 21.Bf6 Nf6 22.e4 b6 23.Bc4 Nd7 24.f4 g6 (24...ba5 25.Ra5 Nb6 26.Be2+/–) 25.e5 ba5 26.Ra5 Kf8 (better is 26...g5!? 27.e6 Nb6+/–) 27.d6+- h6 (27...g5 28.Bd5 gf4 29.Ba8 Ra8+-) 28.e6?? (better is 28.Bd5 g5 29.Ba8 Ra8 30.Rda1 gf4 31.Ra7+-) 28...fe6+/– 29.Be6 Nb6 30.f5 gf5 31.Ra2 f4?? (31...Kg7 32.Bf5 Nc4 33.Be4+/–) 32.Rf2 (better is 32.Rg2 Rd6 33.Rd6 Ke7+-) 32...a5?? (32...Kg7 33.Rf4 Rf8 34.Rg4 Kf6 35.Re4+/–) 33.ba6 (33.Rg2 Rd6 34.Rd6 Nc8 35.Rd8 Ke7 36.Rc8 Rc8 37.Bc8 Kd8+-) 33...Ra6? (33...Kg7 34.Rf4 Ra6 35.Kf2+-) 34.Rf4 (better is 34.Rg2 Rd6 35.Rd6 Ra1 36.Kf2+-) 34...Kg7 35.Rf7 Kg6?? (better is 35...Kh8 36.Rdf1 Raa8+-) 36.Kh1 c4 (36...Ra4 37.Rg1 Kh5 38.Rf5 Kh4 39.Bf7 Kh3 40.Rh5 Rh4 41.Be6) 37.Rg1 Kh5 38.Rf5 Kh4 39.Rg4 Kh3 40.Rf3 1–0. marinscrofan – radboud (1780), gameknot.com, 2008.

5.bc6 Nc6 6.e3 Bd6 7.Nf3 0-0 8.c4 e5 9.Be2 (9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 e4+=) 9...e4 10.Nd4 Ne5 11.Qb3 (11.Na3!?-/+) 11...dc4-+ 12.Bc4 a6 13.Nc3 Qc7 14.Be2 Bg4 15.Nd5 (15.f3 ef3 16.gf3 Bh3=) 15...Nd5+= 16.Qd5 Be2 17.Ke2 Qc4 (17...Nd3!? 18.Nf5 Nb2-/+) 18.Qc4+= Nc4 19.Bc3 g6 20.d3 ed3 21.Kd3 Rac8 22.Rab1 Ne5 23.Kd2 Rc7 24.Bb4 Rfc8 25.Bd6 Nc4 26.Ke2 Nd6 27.Rb6 Ne4 28.a5 Kf8 29.Kf3 (29.Ra1!?=) 29...Nd2-/+ 30.Ke2 Nc4 31.Rb4 Na5 32.Rhb1 b5 33.R4b2 Nc6 34.Ra1 Nd4 35.ed4 Rc2 36.Rc2 Rc2 37.Ke3 Rc6 38.Ke4 Ke7 39.g4 Kd6 40.f4? (better is 40.Ra3-+) 40...b4 41.Ra4 (41.Rb1 Rb6 42.Kd3-+) 41...Rb6 0–1. Kutalkova,Sarka – Olsar,Z (1945), Karvina Open, 2015.

5.bc6 Nc6 6.e3 g6 7.Nf3= Bg7 8.Be2 0-0 9.0-0 Qb6 10.Ba3 Re8 11.Nc3 (11.d4 Qc7=) 11...Ne4 12.Ne4 Ba1?? (12...de4 13.Ng5 Ba1 14.Qa1=) 13.Qa1?? (13.Nd6 Bb2 14.Bb2+- (14.Ne8?! Ba3 15.Qa1 Bb2=)) 13...de4= 14.Rb1 (better is 14.Ng5!? Qa5 15.Ne4+=) 14...Qc7 (14...Qa5 15.Nd4 Qd2-/+ (15...Qa4 16.Bb5 Qa5 17.Nc6 bc6 18.Bc6+/–)) 15.Qc3?? (better is 15.Ng5 f5 16.d4-/+) 15...ef3-+ 16.Bf3 Bd7 17.Bc6 (17.Qf6 Nd8-+) 17...Bc6 18.Bb2 e5 19.f4 (19.d3 Qd7 20.a5 Rac8-+) 19...f6 (19...Qd8!? 20.d3 Ba4 21.Qd2-+) 20.fe5 fe5 21.Qb3 Kg7 22.Rf1 (22.d3 Qb6 23.d4 Qa5-+) 22...Re7 (22...Qd7 23.Qb4-+) 23.d4 Kh6 (23...Qa5 24.Ba3 Rd7 25.Qe6-+) 24.de5 (24.d5 Be8-+) 24...Rd8 (24...Qa5 25.e4 Qb6 26.Rf2 Qb3 27.cb3-+) 25.c4? (25.Qc4 g5 26.Qg4 Qb6= (26...Re5?? 27.Rf6 Kg7 28.Rf5+-)) 25...Re5 (25...Qd7 26.Bd4-+) 26.Be5 (26.e4-+) 26...Qe5 27.Qb4 (27.Re1-+) 27...Qe3 28.Kh1 Qe2 0–1. tanto – plmackenzzie, net–chess.com, 2001.

5.d3 Nbd7 6.Nf3 +=.

5.d3 Be7 6.e3 (6.Nf3 Nbd7=) 6...0-0 (6...a6 7.Nd2+=) 7.Nf3 a5 (7...a6 8.Nbd2=) 8.Be2 (8.g3 b6=) 8...Nbd7 9.Nbd2 (9.0-0 b6=) 9...Qc7 (9...b6 10.0-0=) 10.0-0 b6 11.d4 (11.h3 Bb7=) 11...Bb7+= 12.dc5 (12.Rc1 c4 13.c3 Ne8+=) 12...Nc5 (worse is 12...Qc5 13.Ba3 Qa3 14.Ra3 Ba3 15.Nd4+=; 12...Bc5?! 13.c4+=) 13.Be5 (13.Ne5 Nfe4+=) 13...Qd7 (13...Bd6 14.Bf6 gf6 15.g3+=) 14.Re1 (14.Bd4 Rfc8+=) 14...Rac8 (14...Rad8 15.h3+=) 15.Bd4 (15.h3 Nfe4-/+) 15...Rfd8 (15...Qc7 16.c4-/+) 16.h3 (16.Ne5 Qc7+=) 16…Qe8 +=. Massoni,Luigi – Angelov,Hristo, UECC, 1999.

5.e3 Nc6 6.c4 Ne7 7.Nf3= dc4 8.Bc4 Ned5 9.0-0 Be7 10.d4 0-0 11.Nbd2 cd4 12.Nd4 b6? (better 12...Bd6+=) 13.Nc6+- Qc7 14.Ne7 Qe7 (14...Ne7 15.Rc1+-) 15.Ba3 Qc7 16.Bf8 Kf8 17.Rc1 Qe7 18.Qc2 Bb7 19.Ne4?? (19.Bd5 ed5 20.Qf5 a6+-) 19...Ne4?? (better 19...Nb4 20.Qb2 Be4-/+) 20.Qe4+- Kg8 21.Bb3 (21.Bd3 g6 22.Qe5 Rd8+-) 21...Nf6 (21...Nc3 22.Qd3 Ne4 23.Qe2+-) 22.Qe5 Ng4?? (better 22...Qb4 23.Qc7 Qe4+-) 23.Qg3 (23.Qf4 Bg2 24.Kg2 Nf6+-) 23...Qg5 (23...Qb4 24.Rc7 Bd5 25.Bd5 ed5+-) 24.h3 h5 25.hg4 hg4 (25...h4 26.Qh3+-) 26.Rc7 Be4 (26...Bd5 27.Bd5 Qd5 28.Qg4+-) 27.Rfc1 g6 (27...a5 28.R1c4 Bf5 29.R7c6+-) 28.Rc8 (28.Be6 Bd5 29.Bd5 Qd5 30.Qg4 Rd8+-) 28...Rc8 29.Rc8 Kg7 30.Qf4 (better 30.Be6 Qf6 31.Bf7 Bf5+-) 30...Qf4 31.ef4 1-0. BeepBeepImAJeep (2585) - profesional (2020), lichess.org, 2015.

5.e3 Nbd7 6.a4 b6 7.Nf3 Bd6 8.Be2 e5 9.d3 Qc7 10.h3 Bb7 11.Nfd2 0-0 12.0-0 Rfe8 Black plans e4 13.Re1 Rad8 (13...h6 14.Nc3=+) 14.Bf3 (14.a5!?=+) 14...e4-/+ 15.de4 de4 16.Be2 Be5 (16...Nd5 17.Qc1-/+) 17.Qc1=+ Bb2 (17...Nd5 18.Nc4=+) 18.Qb2 Ne5 19.Qc1 (19.Rd1 h6=+) 19...Qc8 (better 19...g5 20.Nc3 g4 21.hg4 Neg4-/+) 20.Kh2? (20.Nc3!?=+) 20...Qe6 (better 20...Qf5 21.Nc3 Nf3 (21...Qf2?! 22.Rf1 Qe3 23.Nde4-+) 22.gf3 ef3 23.Nf3 Bf3 24.Bf3 Qf3-+) 21.Rg1? (better 21.Kg1-/+) 21...Neg4! 22.hg4 (22.Bg4 Qe5 Double attack; 22.hg4 Qe5 Double attack) 22...Qe5 23.g3 Qa1 24.c3 Qa4 25.g5 Nd7 (better 25...Nd5 26.Rd1-+) 26.Qb2 (26.c4 Qa1 27.Nc3 Qc1 28.Rc1-+) 26...Ne5 27.c4 Qb4 (better 27...Nd3!? 28.Bd3 ed3 29.Rc1-+) 28.Qc2 Rd7 (28...Nd3 29.Qa2-+) 29.Rd1 (29.Nc3 Red8 30.Nde4 Nc4-+) 29...Red8 30.Kg2 (30.Nc3 Nd3 31.Rb1 Ne1 32.Re1 Rd2-+) 30...Nf3! 31.Bf3 (31.Nf3 ef3 Double attack; 31.Bf3 ef3 Combination) 31...ef3 32.Kh2 Rd3 33.Qa2 (33.g4 a5 34.ba6 Ba6-+) 33...Bc8 (33...Be4 34.Kh3-+) 34.g4 (34.Qa7 R3d6 (34...Rd2?! 35.Nd2 Rd2 36.Qa8-+) 35.Rf1 h5-+ (worse 35...Rd2 36.Nd2 Qd2 37.Qb6-+)) 34...Be6 (34...Bg4!? 35.Kg3 Be6 36.Rc1 Rd2 37.Nd2 Qd2 38.Qd2 Rd2 39.Ra1 Bc4 40.Ra7-+) 35.Qa7 (35.Rc1 Rd2 (worse 35...Bg4 36.Rc2-+) 36.Nd2 Qd2 37.Qd2 Rd2-+) 35…Qb2 (35...Qb2 36.Kh1 Qe5-+; 35...Rd2?! 36.Rd2 Rf8 37.Qe7=) 0–1. Macedo,Alexandre Soares De (1850) – Azevedo,AA A (2045), Aberto do Brasil Xadrez Potiguar, 2019.

5.e3 Nbd7 6.g3 Bd6 7.d4 (7.Ne2 e5-/+) 7...b6 (7...cd4 8.Bd4 0-0 9.Bg2-/+) 8.Ba3 Bb7 9.Nf3 Qe7 10.c3 0-0 11.Nbd2 Rac8 12.Rc1 c4 (better is 12...e5!?-/+) 13.Bd6= Qd6 14.Bg2 Ne4 15.Ne4 de4 16.Nd2 f5 17.0-0 Bd5 18.f4 Nf6 19.h3 h5 (19...a6 20.Ra1+=) 20.Kh2 Qe7 21.Qe2 Qa3 22.Ra1 (better is 22.Qd1!?=) 22...Qc3-/+ 23.Rfc1 Qd3 24.Qd3 (better is 24.Qf2!? c3 25.Nb1-/+) 24...ed3-+ 25.a5? (25.Ra3-+) 25...Bg2 26.Kg2 c3 27.Nf3 Ne4 28.ab6 ab6 29.Ra3 (29.Ne5 d2 30.Rc2 Ra8-+) 29...d2 30.Nd2 (30.Rca1-+) 30...cd2 (30...Nd2?! 31.Rac3 Rc3 32.Rc3-+) 31.Rd1 Rc1 32.Rd2 Nd2 33.Rd3 (33.Ra2 Ne4-+) 33...Ne4 34.d5 (34.Ra3 Rfc8 35.Ra2 R8c2 36.Rc2 Rc2 37.Kf1 Ng3 38.Ke1 Re2 39.Kd1 Re3-+) 34...Rd8 (34...Rc2 35.Kf1 Ra8 36.Ke1 Raa2 37.Rd4 Re2 38.Kd1 Nc3 39.Kc1 Rec2) 35.Ra3 Rd5 (35...Rc2 36.Kg1 Rd5 37.Ra8 Kh7 38.Rd8 Rd8 39.g4 Rd1) 36.Ra8 Kf7 37.Ra7 Kf6 38.Kf3 Rf1 39.Kg2 Rf2 0–1. MasterofDisaster – Alfilnegro, Live Game Caissa's Web, 2004.

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 b6 9.0-0 Bb7 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Nd4 dc4 14.Nc4 Nc5 15.Bf3 Bf3 16.Qf3 Qe7?? (better 16...Qd5 17.Qd1 Rc7=) 17.Nc6+- Qc7?? (better 17...Rc6 18.bc6 Rc8+-) 18.Be5 Qb7 (18...Qd7 19.Bf6 Bf6 20.Rfd1+-) 19.Nd6 Qd7 20.Nc8 Rc8 21.Rfd1 (21.Bf6 Bf8+-) 21...Qe8 (21...Nd5 22.Bg7 Kg7 23.e4 Ne4 24.Qe4+-) 22.Na7 (22.Bf6!? Ra8+-) 22...Ra8 23.a5 (better 23.Bf6 Bf6 24.Rc5 bc5 25.Qf6 c4+-) 23...Nfe4 24.ab6 (better 24.Bg7 Kg7 25.ab6+-) 24...Be5 25.Nc6 Bf6? (better 25...f6+-) 26.b7! Rb8 (26...Nb7 27.Qe4 Deflection) 27.Nb8 Qb8 28.Rc5! Nc5 (28...Qb7 29.Rc6 Qb5 30.Qe4+-) 29.Qf6 (29.Qf6 Nb7 30.Rd7+-) 1-0. BeepBeepImAJeep (2690) - biff4317 (2540), lichess.org, 2020.

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 dc4 10.Bc4 Nb6 11.Be2 Qe7 12.d4 cd4? (12...Nbd5 13.Nbd2 Nd7 14.a5+=) 13.Nd4 (13.Ba3 Qe8 14.Bf8 Qf8 15.Nd4 e5+/-) 13...Nbd5? (better 13...Rd8 14.a5 Nbd5=) 14.Ba3+- Nb4? (better 14...Qd8 15.Bf8 Qf8+-) 15.Qb3 Nfd5 16.Bc4 a5 17.ba6! Bd7 (17...Na6 18.Be7 Pinning (18.Be7 Deflection); 17...ba6 18.Bd5 Combination) 18.Bd5 (18.Bd5 ed5 19.Bb4+-) 1-0. BeepBeepImAJeep (2720) - master_future (2385), lichess.org, 2020.

5.e3 g6 6.Nf3= Bg7 7.Be2 0-0 8.0-0 c4 (8...a6 9.d4=) 9.d3+= cd3 10.cd3 a6 11.Na3 Bd7 12.Rc1 ab5 13.ab5 Qe7 14.Nc2 (better is 14.Qb3!?+=) 14...Bb5+= 15.Ncd4 Bd7 (15...Ba4 16.Qd2+=) 16.Qb3= Bc6 17.Ra1 Nbd7 (better is 17...Ra1!? 18.Ra1 Rc8+=) 18.Ba3+/– Nc5 19.Qc2 Nfd7 20.Nc6 bc6 21.d4 Ra4?? (better is 21...Ra3!? 22.Ra3 Ne4+/–) 22.Bc5 (better is 22.Qa4! Na4 23.Be7+-) 22...Nc5 23.Ra4 Na4 24.Qa4 Rb8?! (24...c5+-) 25.Qc6 Rb2 26.Bb5 (26.Bd3 Rb3 27.Bb5 Bf8+-) 26...Qb4 (26...Bf8 27.Bd3+-) 27.Qc8 Bf8 28.Be8 f6 (28...Qb7 29.Qc1 Be7+-) 29.Qe6 (29.Qe6 Kg7 30.Qf7 Kh6 31.Qf6+-) 1–0. TeaCzar – nevets101, ChessWorld.net, 2010.

5.Nf3 a6 6.e3 Be7 7.c4 b6 8.Nc3 (8.Be2 0-0=) 8...Bb7 (8...0-0 9.Bd3+=) 9.cd5= ed5 10.d4 c4 11.Qc2 (11.Be2 0-0=) 11...Bb4 (11...0-0 12.Be2=) 12.Ba3 (12.Be2 ab5 13.ab5 Ra1 14.Ba1 0-0=) 12...a5 (12...Bc3 13.Qc3 ab5 14.ab5=) 13.Nd2 (13.Be2 Qe7 14.Bb2 0-0=) 13...Qe7 14.Qb2 0-0 (14...Nbd7 15.Be2=) 15.Na2?? (better is 15.Be2=) 15...Ba3-+ (15...Ba3 16.Qc2 Nbd7-+) 0–1. Blasig,Volker – Bestgen, 1980.

5.Nf3 c4 6.e3 g6 (6...Bb4!?=) 7.Be2 Bg7 8.d3 cd3 9.Bd3 0-0 10.0-0 b6 11.c4 dc4 12.Bc4 a6 13.Qc2 ab5 14.ab5 Ra1 15.Ba1 Bb7 16.Nbd2 Qc7 17.Nd4 Nbd7?? (17...Rc8 18.Qd3=) 18.Rc1 (better is 18.Ne6 Qd6 19.Nf8+-) 18...Nc5= 19.Nc6 (19.N4f3!?=) 19...Bc6+= 20.bc6 Qc6 21.Nb3 Nb3 22.Qb3 Rc8 23.Bb2 Qb7 24.h3 Ne4 25.Bg7 Kg7 26.Qb2 Kg8 27.Be2 Rc1 28.Qc1 Qd5 29.Bf3 Kg7 (better is 29...Qc5!? 30.Qc5 Nc5-/+) 30.Qb2= f6 31.Qb6 Qe5?? (31...f5 32.Qc7 Kh6 33.Qf7=) 32.Qb1 (better is 32.Qb7 Kh6 33.Qe4 Qe4 34.Be4+-) 32...Nd2= 33.Qb7 Kh6 34.Be2 -/+. TIROLOCO – Putte6, Live Game Caissa's Web, 2004.

5.Nf3 Bd6=+ 6.c4 (6.Be5 0-0=+) 6...d4 (6...0-0 7.e3-/+) 7.d3 (7.e3 de3 8.de3 0-0=) 7...0-0-/+ 8.g3 b6 (8...Qa5 9.Qd2 Qd2 10.Nbd2 e5=+) 9.Nd4 Bb7?? (9...cd4 10.Bg2) 10.Nf3=+ Nbd7 (10...Bf3!? 11.ef3 a6=) 11.Bg2+= Qc7 (11...Ne5 12.Be5 Be5 13.Ra3=) 12.0-0 e5 (12...Ne5 13.Nbd2+=) 13.Nc3+- Rfe8 14.e4 (14.a5 ba5 15.Qa4 e4 16.de4 Ne4 17.Ne4 Re4+-) 14...Rad8+= 15.Nd5 Nd5 16.ed5 Nf6 17.Re1 Bc8 18.a5 Bg4 (18...ba5 19.Qa4+-) 19.a6 (19.h3 Bf3 20.Qf3 ba5+-) 19...h6 20.h3 Bh5 21.Re3 Nh7 (21...Nd7 22.Qc2+-) 22.Qc2 Re7 (22...Nf6 23.Rae1 Nd7 24.Re4+-) 23.Nh4 (23.Rae1 Bf3 24.Bf3 Nf6+-) 23...Qd7 (23...Ree8!?+-) 24.g4+- Bg6 (24...g5 25.Nf5 (25.gh5?! gh4 26.Rae1 f6+-) 25...Bg6 26.Ne7 Qe7 27.Rae1+-) 25.Ng6 fg6 26.Rae1 Rde8 (26...Nf6 27.g5 hg5 28.Be5 Be5 29.Re5 Re5 30.Re5+-) 27.Be4 Nf6 28.Bg6 Ng4 (28...Rf8 29.Bf5 Qd8+-) 29.hg4 (29.hg4 Qg4 30.Rg3+-) 1–0. Woschkat,Karl_Heinz – Hornyak,Istvan, CiF, 1991.

5.Nf3 Bd6 6.d3 Nbd7 7.c4 0-0 8.e3 b6 9.Nbd2 Bb7 10.g3 e5 (10...a6+=) 11.Qc2 (11.cd5 Bd5 12.Bg2 a6=) 11...Re8 (11...e4!? 12.de4 de4-/+) 12.Bg2 d4 13.0-0 de3 14.fe3 Nf8 (14...Ng4 15.Rae1 f5 16.Qd1=) 15.e4 (15.a5 a6+=) 15...Bc7 16.Rad1 (16.a5 ba5 17.Nb3 a6=) 16...Qe7 (16...a6 17.a5=) 17.Nb3 (17.Nb1 a6=) 17...Ng6 18.Rf2 (18.a5 h5=) 18...Rad8 19.Rfd2 Rd7 (19...h5 20.a5+=) 20.h3 (20.Bh3!?=) 20...Red8 21.Ne1?? (21.a5 Nh5 (21...ba5?! 22.Bc3=) 22.a6 Ba8-/+) 21...Qe6?? (better is 21...Nh5-+) 22.Nf3 h6 23.Kf2 Kh7 24.Qc1 (24.a5!?-/+) 24...Be4 25.de4 Ne4 26.Ke1 (26.Ke1 Nd2 27.Nbd2-+). Baer,Cy (1895) – Nacke,Lars (1930), RSS4D starter–3, 2008.

5.Nf3 Bd6+= 6.Be5 0-0 +=.

5.Nf3 Nbd7 =.

5.Nf3 Be7 6.a5 (6.e3 Nbd7=) 6...0-0 (6...Nbd7 7.e3+=) 7.Ne5 (7.e3 a6+=) 7...Nbd7 8.e3 Ne5 9.Be5 Bd7 (9...Ne4 10.Nc3 f6 11.Bg3 Nc3 12.dc3+=) 10.a6 ba6 11.Ra6 Qe8 12.Nc3 d4 (better is 12...c4!?=) 13.ed4+/– cd4 14.Bd4 Nd5 15.Nd5 (15.Qb1!?+=) 15...ed5= 16.Qe2 (16.Ba7? Bc5 17.Be2 Ra7 (17...Ba7?! 18.b6=) 18.Ra7 Ba7-+) 16...Bb5?? (better is 16...Bf6 17.Rf6 gf6=) 17.Qb5+- Bc5 (17...Bf6 18.Be3 d4 19.Rf6 gf6 20.Qh5+-) 18.Be3 Be3 19.fe3 Qb5 20.Bb5 Rfb8 (20...Rab8 21.Ra5 Rfc8+-) 21.Bc6 Rb1 22.Ke2 Rh1 23.Ba8 Rh2 (23...d4 24.ed4 Kf8 25.Ra7 Rh2 26.Bd5+-) 24.Bd5 g6 (24...Kf8 25.Ra7 f5 26.c4+-) 25.Ra7 (25.Ra7 Kf8 26.c4+-) 1–0. Trkn – guest316, ICC, 2004.

5.h3 b6 6.e3 Bb7 7.d4 Be7 8.c3 (8.dc5 bc5 9.Nf3 a6=) 8...Nbd7 9.Nf3 0-0 10.Nbd2 Qc7 11.Bd3 e5 (11...a6 12.0-0=+) 12.de5= Ne5 13.Ne5 Qe5 14.0-0 c4 15.Nf3 Qe6 16.Nd4 Qd7 17.Bf5 Qd8 18.Qf3 g6 19.Bc2 Re8 20.Nc6 (better 20.Ba3!?+=) 20...Bc6-/+ 21.bc6 Qc7 22.Ba3 Ba3 23.Qf6 Be7 24.Qf3 Qc6 25.Rfd1 Rad8 26.Rd4 (26.e4!?-/+) 26...Bf6-+ 27.Rf4 Re6 (27...Bc3 28.Rc1-+) 28.a5 (28.e4 de4 29.Be4 Qd6-/+) 28...b5 (28...Bc3 29.Rc1 Ba5 30.Rf7-+) 29.e4 (better 29.Rc1-+) 29...Qd6?? (better 29...d4 30.cd4 Rd4-+) 30.ed5+= Qd5 (30...Bc3!? 31.Qc3 Qe5 32.Qe5 Re5=) 31.Rf6+- Re7? (31...Qf3 32.Rf3 (32.gf3?? Rf6 33.Be4 a6-+) 32...Rd2 33.Rc1+-) 32.Qd5 (better 32.Rd1!? Qa8+-) 32...Rd5 33.a6 (better 33.Kf1!?+-) 33...Rd2+= 34.Rc1 Ree2 (34...Kg7 35.Rc6 Ree2+-) 35.Bb1+- Rb2 (35...Kg7 36.Rc6 Rf2 37.Be4+-) 36.Rf1 Kg7 (36...Rb3 37.Rd6+-) 37.Rc6 h5? (better 37...Rb3!?+-) 38.Rc7+- Rb3 39.Ra7 (39.Rc1 Re6 40.Ra7 Ra3+-) 39...Rc3 40.Rb7 Ra3 41.a7 c3 42.Bd3 (better 42.Rc1 b4 43.Bd3+-) 42...c2?? (better 42...Rea2+-) 43.Be2 b4 44.Rb4 (better 44.Bc4 g5+-) 44...Ra7 45.Rc1 Rc7 46.Bd3 Rc3 47.Bc2 Ra3 48.Bb3 Ra7 49.Rcc4 Re7 50.Kh2 Ra7 51.Re4 Rc7 52.Ba4 (52.Re8 Rd7+-) 52...Ra7 53.Rec4 Re7 54.Bb5 Ra7 55.Rc6 Re7 56.Rbc4 Ra7 (56...Re5 57.R4c5 Re1 58.Bc4+-) 57.Rc7 Ra2 (57...Ra5 58.Rb7 Ra8+-) 58.Rf7! Kf7 59.Rc7 Kf6 (59...Kf8 60.f4 Rb2 61.Bd3+-) 60.Rc6 Kg5 (60...Ke7 61.Rg6 Rb2 62.Rg5+-) 61.Rc5 (better 61.Bd3 Kf4+-) 61...Kh6 62.Rc6 (62.Rc6 Kg5 63.Bd3+-) 1–0. TWW_LONDON (1655) – dinoel33 (1665), lichess.org, 2021.

6.c4 d4 7.ed4 cd4 8.Nf3 Bc5 9.Ne5 (9.Bd3 b6=) 9...b6 (9...Nbd7 10.Nd3=+) 10.d3 (10.Be2 Qd6 11.Nd3 Nbd7=) 10...Bb7 11.Qe2 (11.Be2 Bb4 12.Nd2 Qd6=+) 11...0-0-/+ 12.Nd2 Nbd7 13.Ndf3 (13.Nb3 Ne5 14.Nc5 Nf3 15.gf3 bc5=+) 13...Qc7 14.Nd7 Bf3?? (better 14...Qd7 15.Bc1 Qc7-/+) 15.Nf6+- gf6 16.Qf3 (16.gf3?! Kh8+-) 1–0. TWW_LONDON (1820) – ahmadfauzi_512 (1745), lichess.org, 2021.

6.c4 Bd6 7.Nf3=.

6.c4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 b6 10.d4 Nbd7 11.Nbd2 Bb7 12.Rc1 Rc8 13.cd5 Nd5 14.Qb3 cd4 15.Bd4 Nc5 16.Qa2 (16.Qa3 Bd4 17.ed4 Nd7+=) 16...Nb4 (16...Nf4 17.Bc4 Bd4 18.ed4=+) 17.Qa1 Bd4 18.Nd4 e5 19.N4f3 Bf3 20.Nf3 Nb3 (better 20...e4 21.Nd4 Qf6=) 21.Qe5?? (better 21.Rc8 Qc8 22.Qe5+/-) 21...Nc1-+ 22.Bd1 Ncd3 23.Qg3 Qc7 24.Qh4 Ne5 25.Ng5 f6 (25...h5!? 26.Nf3-+) 26.Ne6 (better 26.Bb3 Kh8 27.Ne6-+) 26...Qc4 27.Qc4 Rc4 28.Nf8 Kf8 29.Be2 Rc2 30.Bd1 Rc1 (30...Rd2 31.h3-+) 31.f4 (31.Be2 Rf1 32.Kf1-+) 31...Nc4 32.Kf2 Nd2 33.Rg1 (33.Re1 Ne4 34.Ke2 Nd5-+) 33...Ne4 34.Kf3 (34.Ke2 f5 35.g4 Nd5-+) 34...Nc3 35.e4 Rd1 36.Rd1 Nd1 37.Ke2 (37.g3 Nc3 38.Ke3 Na4-+) 37...Nc3 38.Kf3 (38.Ke3 Na4 39.h3 Nc3-+) 38...Na4 39.e5 (39.Ke3 Nc3 40.e5 Nb5 41.ef6 a4-+) 39...Nc3 (39...fe5!? 40.g3 Nc3 41.Ke3-+) 40.Ke3 Nb5 41.Ke4 (41.ef6 a4 42.Kd2-+) 41...fe5 42.Ke5 Ke7 (42...a4 43.f5 a3 44.fg6 hg6 45.Kf6-+) 43.g4 Nc6 (better 43...a4 44.f5-+) 44.Kd5 Nd6 45.Kc6 a4 46.Kb6 a3 47.Kc6 a2 48.f5 gf5 49.gf5 Nf5 (49...a1Q 50.Kd5 Qa4 51.f6 Kd7 52.f7 Qe4 53.Kc5 Kc7 54.f8Q Qc4) 50.Kd5 a1Q 51.Ke4 Qh1 (51...Qb1 52.Ke5 Qb5 53.Kf4 Kf6 54.Ke4 Qb7 55.Kd3 Qb3 56.Kd2 Qe3 57.Kd1 Nd4 58.h4 Qd3 59.Ke1 Qe2) 52.Kf5-+ Qh2 53.Kg5 Kf7 (53...Qg3 54.Kf5 Qd3 55.Ke5 h5 56.Kf4 Ke6 57.Kg5 Qg3 58.Kh5 Kf5 59.Kh6 Qg6) 54.Kg4 (54.Kf5 h5 55.Ke4 Qe2 56.Kd5 h4 57.Kc6 h3 58.Kd6 Qc2 59.Ke5 h2 60.Kf4 Qf2 61.Ke5 h1Q 62.Kd6 Qb6 63.Ke5 Qf6) 54...Qh6 (54...Qf2 55.Kg5 Qf3 56.Kh4 h5 57.Kg5 Qg4 58.Kh6 Qg6) 55.Kf3-+ Qg5 56.Ke4 h5 57.Kf3 h4 58.Kf2 (58.Ke4 h3 59.Kd3 h2 60.Ke4 h1Q 61.Kd3 Qhd5 62.Ke2 Qgd2 63.Kf1 Q5g2) 58...h3 59.Kf3 (59.Ke2 h2 60.Kd3 h1Q 61.Kc2 Qe4 62.Kb2 Qd2 63.Kb3 Qeb4) 59...h2 60.Kf2 (60.Ke2 Qd5 61.Ke3 h1Q 62.Ke2 Qhf3 63.Ke1 Qdd1) 60...h1Q 61.Ke2 Qh2 62.Kf1 (62.Kd3 Qhd2 63.Ke4 Qgf4) 62…Qgg1 (62...Qc1) 0-1. BeepBeepImAJeep (2750) - Isthemoment (2600), lichess.org, 2020.

6.Be2 Bd6 7.Nf3=.

6.Be2 Be7 7.Nf3 0-0 8.0-0 Nbd7 9.c4 Nb6 (9...dc4 10.Qc2=) 10.Qc2 (10.d3 Bd6=) 10...dc4 (10...Nc4 11.Bc4 dc4 12.Qc4=) 11.Bc4 (11.Na3 c3 12.dc3 Qc7=) 11...Nc4=+ 12.Qc4 Qd5 13.Qh4 (13.Rc1 Qc4 14.Rc4 Rd8=) 13...Qh5?? (better 13...Rd8=+) 14.Bf6+- (14.Bf6 Qh4 15.Bh4 Bh4 16.Nh4+-) 1–0. Goodwin,W – Kasparek, Burlingame California, 1990.

6.Nf3 b6 7.c4 Bb7 8.Be2 Be7 9.0-0 Nbd7 10.cd5 ed5 11.Nc3 0.08/0 11...Nf8 0.38/0 12.d4 0.02/0 12...c4 0.55/0 13.Ne5?! 0.00/0 13...Ne6?! 0.85/0 14.f4?! 0.24/0 14...0-0 0.00/0 15.Bf3 0.18/0 15...Ne4? 1.36/0 16.Ne4 1.36/0 16...de4 1.46/0 17.Be2 1.43/0 17...Rc8 1.64/0 18.Nc4 1.36/0 18...Bd5 1.43/0 19.Rc1 1.29/0 19...Bb4 1.63/0 20.Ne5 1.37/0 20...f6 1.39/0 21.Nc6 1.34/0 21...Bd6?? 8.82/0 22.Bc4? 6.11/0 22...Bc4?! 6.65/0 23.Rc4?? 1.94/0 23...Qd7 2.26/0 24.Qc2?! 1.69/0 24...Kh8? 2.72/0 25.Rc1?! 1.75/0 25...Rce8 1.81/0 26.d5 1.75/0 26...Nc5 1.72/0 27.Bd4 1.65/0 27...Nd3 1.63/0 28.Bb6 1.08/0 28...Nc1 1.98/0 29.Qc1 1.99/0 29...Qg4?! 2.69/0 30.Bd4? 1.44/0 30...Bf4?? 4.87/0 31.ef4 5.01/0 31...e3?! 5.91/0 32.Be3 5.94/0 32...h5?! 6.44/0 33.Rc3 5.98/0 33...h4 6.19/0 34.Bf2 6.09/0 34...Re2? 7.13/0 35.Rf3? 5.93/0 35...h3?? 9.57/0 36.Rh3 9.43/0 36...Kg8 9.65/0 37.Qc4 10.09/0 37...g6 15.53/0 38.d6 9.81/0 38...Kg7 9.32/0 39.Ne7? 7.82/0 39...Re8? 19.91/0 40.Qc7?? 0.91/0 40...R2e7 0.87/0 41.de7?? -#2/0 41...Qd1 -#1/0 42.Be1 -#1/0 42...Qe1 Normal 0-1. Mettigel (2175) - Sasqwatch (2150), Rated Bullet game, lichess.org, 2015.

6.Nf3 Bd6 7.c4 Nbd7 8.d4 0-0 9.Bd3 (9.cd5 ed5 10.dc5 Nc5=) 9...Qc7 (9...cd4 10.Nd4 Bb4 11.Bc3 Bc3 12.Nc3+=) 10.Nbd2 (10.cd5 Nd5 11.Nbd2=) 10...Nb6 (10...cd4!? 11.ed4 dc4=) 11.Rc1 (11.dc5 Qc5 12.Bd4 Qc7+=) 11...Nfd7 (11...Nbd7 12.cd5 ed5 13.dc5 Nc5 14.Bb1+/–) 12.cd5 Nd5 13.0-0 b6 14.Bb1 (14.Nc4 Bb7+/–) 14...Bb7+= 15.e4 (15.Nc4 Rac8=) 15...Nf4 (15...Nb4 16.Qe2+=) 16.e5 Be7 17.Ne4 (17.dc5 Nc5 18.Rc4 Ng6+=) 17...Ng6 (17...Rac8 18.Qd2 f5 19.Nd6 Bd6 20.Qf4+=) 18.h4 (18.dc5 bc5 19.Qc2 Rfd8+=) 18...h6= (18...Nh4 19.Nh4 Bh4 20.dc5 bc5 21.Qh5+-) 19.h5 Nf4 20.dc5 (20.Qc2 Rfd8+= (20...Nh5? 21.Ng3 g6 22.Nh5+-)) 20...Nc5= 21.Nd6 (21.Qc2 f5 (21...Nh5?? 22.Nc5 g6 23.Nb7 Qb7 24.Qc6+-) 22.ef6 gf6=) 21...Nh5 (21...Rad8 22.Qc2 f5 23.ef6 Bd6 24.Qh7 Kf7 25.Bg6 Ng6 26.hg6 Ke8 27.fg7 Rd7+-) 22.Qc2+= g6 23.Nf7 Rf7 (23...Nf4 24.Nh6 Kg7 25.Ng4 Bf3 26.gf3=) 24.Qg6+/– Rg7 25.Qh5 Rf8 (better is 25...Bd5 26.Bd4 Rf8+=) 26.Kh1 (better is 26.Ne1+/–) 26...Bf3-/+ 27.gf3 Bg5?? (27...Rf4 28.Rc5 A) 28...Bc5?! 29.Qe8 Bf8 30.Qe6 Qf7 31.Qf7 (31.Qh6?? Rh4 32.Qh4 Qf3 33.Kh2 Qg2) 31...Kf7 32.e6 Ke7 33.Bg7 Bg7 34.Rc1 Ke6 35.Rc6 Ke5 36.Be4+=; B) 28...bc5?! 29.Qe8 Rf8 30.Qh5-/+; C) 28...Qc5 29.Qe8 Rf8-+) 28.Rc4= Qf7 (28...Qd7 29.Rd4 Qf7 30.Qf7 Rgf7 31.Rc4=) 29.Qf7+= Rgf7 (29...Rff7 30.Be4 Rf4-+) 30.Rc5 (better is 30.Be4!?+=) 30...bc5+= 31.Be4 Rf3 (31...Rg7!? 32.Rg1 Bf4+=) 32.Bf3= Rf3 33.Bc1 Be7 (33...Bc1 34.Rc1 Kf7 35.Rc5+/–) 34.Be3 (34.Kg2 Rf5+=) 34...Rf5 (34...h5!?+=) 35.f4+/– 1–0. epiglotis (2720) – jupiter (2410), net–chess.com, 2002.

7.Nf3 Bb7 8.Bd3 Ne4 (8...Bd6 9.cd5 Bd5 10.Qe2=) 9.0-0 f5 (9...Nd6 10.Na3+=) 10.Ne5 Nd7 (10...Qh4!?+=) 11.Qh5+- Ke7 1–0. GuestWTJX – GuestRTJS, freechess.org, 2019.

7.Nf3 Bb7 8.Be2 Nbd7 9.0-0 Be7 10.d4 0-0 11.Nbd2 Rc8 12.Rc1 Qc7 13.h3 Qb8 14.cd5 Nd5 15.dc5 Nc5 (worse 15...bc5 16.Nc4+=) 16.Nc4 Ba8 17.Be5 Qb7 18.Nd4 Rfd8 19.Bf3 f6 20.Bg3 e5 (20...Qa7!?=) 21.Nc6+/- Qd7?? (21...e4 22.Bd6 ef3 23.Qd5 Kh8 24.Ne7 fg2+-) 22.Bd5+- Qd5 (22...Kh8 23.Nb6 Qd6 24.Nc8 Rc8+-) 23.Ne7 (23.Ne7 Kh8 24.Nd5 Bd5 25.Nb6+-) 1-0. BeepBeepImAJeep (2700) - MexicoChess (2310), lichess.org, 2019.

7.Nf3 Bb7 8.Be2 Be7 9.0-0 0-0 10.d4 Nbd7 11.Nbd2 Qc7 12.Rc1 Rad8 13.cd5 Nd5 14.Nc4 Qb8 15.Nce5 (15.Qc2 Nb4 16.Qb1 f6+=) 15...Ne5= 16.Ne5 Rfe8 (16...Bd6 17.Nf3=+) 17.Bf3 (17.Bh5 Rf8+=) 17...Rc8 (17...Bd6 18.Bd5 ed5 19.Qg4=+) 18.Qd3 (18.dc5 Rc5 19.Rc5 bc5+=) 18...Bd6= 19.Qb1 (19.Be4 f5 20.Bd5 Bd5=) 19...Be5 (19...cd4!? 20.Rc8 Rc8 21.ed4 f6-/+) 20.de5= Nb4 21.Bb7 Qb7 22.Rcd1 Rcd8 23.Bc3 Qc7 24.h3 Rd1 25.Rd1 Rd8 26.Rd8 Qd8 27.Kf1 (27.e4=+) 27...Qd3 (better 27...Qd5!? 28.Kg1 h6-/+) 28.Qd3= Nd3 29.Ke2 Nb4 30.Kd2 Kf8 31.e4 Ke7 32.Ke3 Kd7 33.f4 Nc2 34.Kd3 Nb4 35.Kd2 Na2 36.Bb2 Nb4 37.g4 White prepares the advance f5 37...g6 38.f5 (38.g5 Ke7+=) 38...Ke7 (38...ef5 39.ef5 Nd5 40.Ke2=) 39.Kc3 (39.f6 Kf8+=) 39...Kd7 40.Kc4 Ke7 (40...Nc2 41.Kd3 Ne1 42.Ke2=) 41.Bc1 Kd7 42.Bg5 Kc7 43.Kc3 Kb7 44.Be7?? (44.Bh6 gf5 45.ef5 ef5 46.gf5 Kc7+=) 44...Kc7?? (better 44...ef5 45.gf5 gf5 46.Bc5 bc5 47.ef5 Nd5 48.Kc4 Nb6 49.Kc5 Kc7-+) 45.Bd6 Kb7 46.Kc4 (46.Kd2 h5+=) 46...Na2 (better 46...Nc2=) 47.Bc5?? (better 47.f6+=) 47...bc5-+ 48.Kc5 Nb4?? (48...Nc3 49.fe6 Na4 50.Kd6 fe6 51.Ke6 Kb6-+) 49.Kd6+= Nd3 50.fe6 fe6 51.Ke6 (51.Ke6 Nc5 52.Kf6+/-) 1-0. BeepBeepImAJeep (2645) - Lemine (1750), lichess.org, 2017.

7.Nf3 Nbd7 8.Be2 (8.Nc3 Bb7=) 8...Bb7 (8...Bd6 9.0-0=) 9.0-0 Bd6 10.d4 (10.cd5 Bd5 11.d3 0-0=) 10...Qc7 (10...0-0 11.cd5 Bd5 12.Nc3=) 11.Nbd2 (11.cd5 Bd5 12.Nbd2 cd4+=) 11...0-0 (11...cd4 12.ed4 0-0 13.Rc1=) 12.Rc1 Ne4 13.h3 (13.cd5 Bd5 14.Nc4 Rfd8=) 13...f5 (13...Rac8 14.cd5 Bd5 15.Ne4 Be4 16.Nd2=) 14.Ne4 fe4 15.Ng5 Rfe8 16.Bh5 (16.Bg4 Nf8 17.h4 Rad8=) 16...Re7= 17.f3 h6 18.Bf7 Rf7 19.Nf7 Kf7 20.fe4 Opening the f–file gets White a lot of play 20...Kg8 21.Qg4 Nf8 (21...de4?? 22.Qe6 Kh7 23.Rf7+-) 22.cd5 ed5 23.e5 Be7 24.e6 (better is 24.dc5 Bc5 25.e6+=) 24...h5? (24...Bc8 25.dc5 Ne6 26.cb6 Qb6+/–) 25.Qh5+/– Bf6 26.Qg4 (better is 26.Rf6!? gf6 27.dc5 bc5 28.Bf6+-) 26...Qe7+= 27.Rf6 (27.dc5 Bb2 28.Rf7+=) 27...Qf6+= 28.Rf1 Qh6 29.dc5 bc5 The passed pawn on b5 will quickly become a dangerous weapon (better is 29...Ne6 30.Bd4 A) 30...bc5? 31.Rf6 Qg5 32.Qe6 (worse is 32.Re6 Qg4 33.hg4 cd4-/+) 32...Kh7 33.Qf7+-; B) 30...Nd4?! 31.ed4 Qe3 32.Kh2=; C) 30...Nc5=) 30.Rf7+/– Threatening mate... how? 30...Ne6 (30...d4!? 31.ed4 Bd5 32.dc5 Ne6+/–) 31.Rb7+- Qe3 (31...Re8 32.Kh2 d4 33.ed4+-) 32.Kh1 Do you see the mate threat? 32...d4 (32...Qh6 33.Re7 Nd4 34.Qd7+-) 33.Re7 Rf8 34.Qe6 (34.Re6?! Rf1 35.Kh2 Qg1 36.Kg3 Qf2 37.Kh2 Qg1 38.Kg3 Qf2 39.Kh2 Qg1=) 34...Qe6 35.Re6 Rf2 36.Bd4 (better is 36.Ba3!? d3 37.Kh2+- (37.Bc5?! d2 38.Re8 Kh7+/–)) 36...cd4 37.Rd6 Rd2 38.b6 (38.Rd8 Kf7+-) 38...Rb2 (38...Kh7!?+-) 39.Rd4 Rb6 40.Rd5 (40.Rd8!? Kf7 41.Ra8 Ke7+-) 40...Ra6 41.Rf5 g6 42.Rc5 Kg7 43.Kh2 Kh6 44.h4 Ra8 45.Kg3 Ra7 46.Kg4 Ra8 47.g3 (47.Re5 Ra7+-) 47...Ra7 48.Kf4 (better is 48.Re5+-) 48...Rb7 (better is 48...Ra6+-) 49.Ra5 Rb4 (49...Rc7 50.Ra8+-) 50.Kf3 Rb3 51.Kg4 Rb4 52.Kh3 Rc4 (52...Kg7 53.g4+-) 53.Ra8 (53.Ra7 Rc1+-) 53...g5 (53...Kg7 54.a5+-) 54.Ra6 Kg7 55.hg5 Rb4 (55...Rd4 56.a5+-) 56.a5 Ra4 57.Ra8 Rb4 (57...Kg6 58.a6+-) 58.a6 Ra4 59.Kg2 (59.g4 Ra3 60.Kg2 Kg6+-) 59...Ra3 (59...Ra5 60.a7+-) 60.Kf2 (60.a7 Kh7+-) 60...Kh7 61.g4 Ra5 62.Kf3 (62.a7 Ra3+-) 62...Kg7 (62...Rg5 63.Rb8 Ra5 64.Rb6+-) 63.Kf4 Kh7 (63...Ra4 64.Ke3+-) 64.Ke4 (64.a7 Kg7+-) 64...Kg7 (64...Rg5 65.Kf4 Ra5 66.a7+-) 65.Kd4 (65.a7 Kh7+-) 65...Kh7 (65...Rg5 66.a7 Ra5 67.g5+-) 66.Kc4 Rg5 67.Rd8 (67.Rd8 Ra5 68.Rd7 Kg6 69.a7+-) 1–0. Zhitenev – Shamkovich,Leonid, Moscow, 1963.

7.Nf3 g6 8.Be2 Bg7 9.0-0 0-0 10.d4 Nbd7 11.Nbd2 Bb7 12.Rc1 Re8 13.cd5+= Nd5 14.Nc4 cd4 15.Nd6 Qb8? (better 15...d3 16.Bg7 de2 17.Qe2 Kg7=+) 16.Ne8+- Qe8 17.Bd4 e5 18.Bb2 Nb4 (18...Nc5 19.Rc4+/-) 19.Rc7 Be4?? (better 19...Rd8+-) 20.Qd7 1-0. BeepBeepImAJeep (2735) - Isthemoment (2615), lichess.org, 2020.

6.c4 Bb7 7.Nf3 Be7 8.d4 0-0 9.Be2 Nbd7 10.Nbd2 Rc8 11.0-0 cd4 12.Bd4 Nc5 13.Nb3 Qc7 14.Nc5 Bc5 15.Bc5 Qc5 16.cd5 Qd5 17.Nd4 Qg2 Normal 0-1. SturmPanzerJager (2090) - biorelle (2170), Rated Bullet tournament JwcjcyoQ, lichess.org, 2015.

6.c4 d4 7.Nf3 e5 8.Ne5+/- Bd6 (8...Bb7 9.a5+/-) 9.Nd3 (better 9.Qf3 Be5 10.Qa8+-) 9...0-0?? (9...Bb7 10.ed4 cd4 11.Qe2 Be7 12.c5 bc5 13.Nc5+-) 10.Be2?? (10.Qf3 Nc6 11.a5= (11.bc6? Bg4-+; 11.Qc6?! Rb8=)) 10...Re8+= 11.Bf3 Nbd7?? (better 11...Ne4+=) 12.Ba8+- Qe7 (12...Ne5 13.Ne5 Be5 14.Qb3+-) 13.0-0 Ne5 14.Ne5 Be5 (14...Qe5 15.f4 Qe6 16.ed4 Qc4 17.Na3+-) 15.Bc6 (15.f4 Bd6 16.ed4 Be6+-) 15...Bg4 (15...de3 16.Be5 (16.Be8?! e2 17.Qc1 Bb2 18.Qb2 e1Q+/-) 16...ef2 17.Rf2 Qe5 18.Nc3+-) 16.f3 Bf5 (16...de3 17.Be5 (17.fg4?! Bb2 18.Qf3 Ba1 19.Be8 Ne8+-; 17.Be8?! Bb2 18.Bf7 Kf7+-) 17...Qe5 18.de3 (18.fg4 e2 19.Qe2 Qe2 20.Be8 Ne8=; 18.Be8?! e2 19.Qe1 ef1R 20.Kf1 Qa1 21.fg4 Qa4+-) 18...Qe3 19.Rf2+-) 17.e4 (better 17.f4 Bd6 18.Be8 Ne8 19.ed4 cd4+-) 17...Bd7 18.Bd7 Nd7 19.d3 (19.f4 Bc7 20.d3 Qe6+-) 19...Nf6 (19...Qh4 20.g3 Bg3+-) 20.f4 Bb8 (20...Bc7 21.Qf3+-) 21.Nd2 (21.a5 ba5 22.Ra5 Qd7+-) 21...g6 (21...Qe6 22.Nb3+-) 22.Bc1 Nd7 23.Nf3 Nf6 (23...Bc7 24.Bd2+-) 24.Ng5 h6 25.Nh3 Kh7 26.Nf2 Rg8 27.Bd2 Bc7 28.Qf3 Bd8 29.Rae1 Nh5 (29...Qe6 30.f5 gf5 31.ef5+-) 30.e5 (30.f5 Nf6+-) 30...Qe6 (30...Ng7 31.a5!+-) 31.Ne4 (better 31.f5 Qf5 32.Ng4 Qf3 33.Rf3+-) 31...g5 (31...Ng7+-) 32.f5 (32.Qh5!? Qg6 33.Ng5 Bg5 34.Qg6 Kg6 35.fg5 hg5 36.Rf6 Kg7+-) 32...g4 33.fe6 gf3 34.Rf3 (better 34.ef7!? Rg2 35.Kh1 Be7 36.Rf3 Rg4+-) 34...fe6 35.Rf7 (better 35.Rh3!? Kg6 36.g4 Kh7 37.Rh5 Rg4 38.Kh1 Rg6+-) 35...Rg7 36.Rg7 Kg7 (36...Ng7 37.Rf1 Nf5 38.g4+-) 37.g4 Nf4 (37...Kg6 38.gh5 Kh5 39.Rf1+-) 38.Bf4 Bg5 39.Bg5 hg5 40.Rf1 Kg6 41.Rf6 Kg7 42.Ng5 (42.Ng5 a6 43.ba6 b5 44.a7 ba4 45.a8Q a3 46.Qf8) 1-0. BeepBeepImAJeep (2655) – azoloto, lichess.org, 2016.

6.c4 Bd6 7.Nf3 Bb7 8.Be2 Qe7 9.0-0 Nbd7 10.d4 e5 (10...0-0 11.a5=) 11.de5 Ne5 12.Ne5 Be5 13.Be5 Qe5 14.Nd2 0-0-0 15.Nf3 (15.a5 dc4 16.Qc1 c3+=) 15...Qf5 (15...Qb2!?=) 16.cd5+= Nd5 17.Qb1 (17.Qb3 Rhe8 18.Rfd1 Nb4+=) 17...Qg4 (better 17...Qb1!? 18.Rfb1 Nc3=+) 18.Nd4 (18.Rc1 Rd6 19.Qb2 Re8+/-) 18...Qg6 19.Bd3 Qg5 20.Nf3 Qf6 21.Qb3 (21.Ra3 Nc3 22.Qc2 Bf3 23.Rc3 Rd5+=) 21...Nb4= 22.Be2 g5 (22...Bd5!? 23.Qb1 Qg6=) 23.Rac1 g4 24.Qb4 (24.Ne1 Kb8+=) 24...gf3 25.Qg4 Kb8 26.Bf3?? (better 26.Qg3 Ka8 27.Bf3 (27.gf3?? Rdg8-+) 27...Bf3 28.Qf3 (worse 28.gf3 Rdg8-+) 28...Qf3 29.gf3 Rhg8 30.Kh1+=) 26...Rhg8-+ 27.Qg8 (27.Qf4 Qf4 28.ef4 Bf3-+) 27...Rg8 28.Bb7 Kb7 29.f3 (29.Rfd1 Qe6-+) 29...h5 (better 29...Qg5!? 30.g4 Qe3 31.Kh1-+) 30.Rf2 h4 31.h3 (31.Rd1 h3-+) 31...Qg6 (31...Qe6!? 32.e4-+) 32.Rd1 Qf5 (32...Qe6 33.e4-+) 33.Rfd2 c4 34.e4 (34.Kh1 c3 35.e4 Qg5-+ (35...cd2 36.ef5 Rd8 37.g3+=)) 34...Qf4 (better 34...Qf3! 35.Rf1 Qe3 36.Rff2-+) 35.Rd7 (35.Kh1 Qe3-+) 35...Kc8 (35...Kb8 36.R7d2-+) 36.R7d4 (36.Kh1 Qg5 37.R7d2-+) 36...Qf3 (better 36...Qe3 37.Kf1 c3 38.Rc4 Kb8-+) 37.Rd8?? (better 37.Rc4 Kb8 38.Rd8 Kb7 39.Rg8 Qd1 40.Kh2 Qd6 41.Kh1 Qd1 42.Kh2 Qd6 43.e5 Qe5 44.Kg1 Qe1 45.Kh2 Qe5 46.Kh1 Qe1 47.Kh2 Qe5=) 37...Rd8-+ 38.Rd8 (38.gf3 Rd1 39.Kf2 c3 40.Ke3 c2 41.Kf4 c1Q 42.Kf5 Qc5 43.e5 Qc2 44.Kg4 Rd4 45.f4 Qg2 46.Kh4 Rf4 47.Kh5 Qg6) 38...Kd8 39.gf3 c3 40.Kf2 (40.Kf2 c2 41.Ke2-+). BeepBeepImAJeep (2600) - Training131 (1930), lichess.org, 2016.

6.d4 c4 7.g3 Nbd7 (7...a6 8.Ba3-/+) 8.Bg2 Bb7 (8...a6 9.Nf3=+) 9.Nf3 (9.Ba3 a6=) 9...Rc8 (9...a6 10.0-0=+) 10.c3 (10.0-0 Ne4=) 10...Bd6 (10...Be7 11.Ba3=) 11.0-0 0-0 (11...a5 12.ba6 Ba6 13.Ba3 Ba3 14.Na3=) 12.Ba3 (12.Nfd2 Qc7=) 12...Ba3 13.Na3 Ne4 14.Qc2 Qf6 15.Nd2 Ng5? (15...Nd2 16.Qd2 Qg5 17.a5=) 16.e4 (16.Nac4 Rc7 17.Nd6 Ba8+-) 16...Qg6 (better 16...de4!? 17.Rad1 Rfd8=) 17.e5 (17.ed5 Qc2 18.Nc2 ed5+-) 17...Qh6 (17...Qc2 18.Nc2 f5 19.a5+-) 18.h4 Ne4 19.Ne4 (19.Be4 de4 20.Nac4 Rc7+-) 19...de4 20.Be4 Be4 21.Qe4 Rfe8 (21...Rc7 22.Qe2 Rfc8 23.Nc2+-) 22.Qe3 (22.Qe2 Rf8+-) 22...Qg6 (22...Qe3!? 23.fe3 f6+-) 23.Qe2+- f6 (23...Rf8 24.Nc4 Rc7 25.a5+-) 24.ef6 (24.Nc4!? Re7+-) 24...Nf6 (24...e5 25.Nc4 Qf6 26.Rfe1+-) 25.Nc4+- Ne4 26.Ne5 (better 26.Qd3 Rc4 27.h5+=) 26...Qf5? (better 26...Nc3 27.Qf3 Qf6+-) 27.c4+- Rcd8 (27...Nd6 28.a5+-) 28.Nc6 Rd6 (28...Rd7 29.Qd3+-) 29.Rae1 (29.Rfe1 Nf6+-) 29...Nc3 (29...Nf6 30.Qe5 Qh3 31.f3+- (31.Qd6?? Ng4 32.Qf8 Kf8 33.Re6 Qh2; 31.Na7?? Ng4 32.Qe6 Rde6 33.Re6 Qh2)) 30.Qe5 (30.Qd2!? Ne4 31.Qd3 Nf6 32.Qf5 ef5 33.Re8 Ne8+-) 30...Qe5 31.Re5 (31.Ne5?! Rd4 32.a5 Rd2+-) 31...Na4 32.Ra1 Nb2 33.Ra7 (33.c5!? bc5 34.Rc5 Rf8+-) 33...Nc4 34.Re1 (34.Rg5 g6+-) 34...Nd2 35.Kg2 Rd5?! (35...Nb3+-) 36.Ne7 Re7 37.Re7 Rd4 (37...Nb3 38.R1e6 Nd4 39.Rb6+-) 38.R1e6 g6 (38...Nc4 39.Rc6 h6 40.Rcc7+-) 39.Rb7 (39.Rb6 Rd8 40.Rbb7 h5+-) 39...Nc4 (39...Rd8 40.Ree7 h5+-) 40.Re8 1–0. NN – NN, 2014.

6.Be2 Nbd7 7.Nf3 Bd6 8.0-0 Qc7 (8...0-0 9.Nc3=+) 9.h3 (9.a5 0-0=) 9...Bb7 10.d3 (10.Re1 0-0=+) 10...e5 (10...0-0 11.Na3=+) 11.Nbd2 (11.a5 ba5 12.Bc3 0-0=+) 11...0-0=+ 12.c4 e4 13.de4 de4 (worse 13...Ne4 14.cd5 Bd5 15.Nc4=) 14.Ne1 (14.Nh4 a6=+) 14...Rad8 (14...a6 15.f3=+) 15.Qc2 Be5 (15...Rfe8 16.a5=+) 16.Nb3 White plans a5 16...Bb2 17.Qb2 Ne5 18.Qc2 Rd7 19.Qc3 White intends a5 19...Rfd8 20.a5 Nd3 21.a6 Ba8 22.Rd1 Ne5 (22...Nf4 23.ef4 Rd1 24.Bd1 Rd1 25.Qe5 Qe5 26.fe5=+) 23.Rd7= Rd7 24.Nc2 Ng6 25.Rd1 Qd8 26.Rd7 Qd7 27.Qd2 Qc7 28.Ne1 Nh4 (28...Ne5 29.Qc3=) 29.Qd1 (29.g3 Nf5=) 29...Nd7 (29...Ng6 30.Nc2=) 30.Nd2 f5 (30...Nf5 31.Qc2 Nf6 32.Qc3=) 31.Nf1 Ne5 32.Nh2 Nf7 33.f3 (33.Nc2 Qe7=) 33...ef3 (33...Nd6 34.f4=) 34.Nhf3 Ng6 (34...Qe7 35.Nh4 Qh4 36.Kf1=+) 35.Qd3 (35.Bd3 Nd6=) 35...Be4 36.Qd1 h6 (36...Qe7 37.Nd2=) ½–½. Ruhle,Ernst Albrecht – Dittler,Volkfried, Wangs Pizol op, 1996.

6.Qf3 Nbd7+= 7.Nh3 Bd6 8.d3 Bb7 9.Nd2 Qc7 10.g3 c4! 11.dc4? (better is 11.Bf6 Nf6 12.Bg2-+) 11...Ne5 12.Qe2 (12.Be5 Be5 13.Rd1 dc4 14.e4-+) 12...dc4 13.Rg1 (13.Nc4 Bh1 14.0-0-0 Nc4 15.Qc4-+) 13...c3 14.Ba3 (14.0-0-0 Bb4 15.Kb1 cb2 16.Ng5-+) 14...cd2 15.Qd2 Nf3 (15...Nf3 16.Kd1 Nd2 17.Bd6 Qd6-+) 0–1. preethan (2135) – pierred (2850), net–chess.com, 2015.

6.Nf3 Bb7 7.d3 Be7 8.Nbd2 a6 9.c4 dc4 10.dc4 ab5 11.ab5 0-0 12.Be2 (12.Ra8 Ba8 13.Qc2 Nbd7+=) 12...Nbd7 13.0-0 Bd6 14.Ne4?? (better 14.Ra8 Qa8 15.Qc2=) 14…Ne4-+ 0–1. Abdullaevich (1955) – Behzad64 (1940), lichess.org, 2020.

6.Nf3 Nbd7 7.c4 Bb7 8.Nc3 d4 9.ed4 Bf3 (9...cd4!? 10.Nd4 Ne5=+) 10.Qf3+= (worse 10.gf3 cd4 11.Ne2 e5=) 10...cd4 11.Ne4 e5 12.g3 (12.a5!? Rc8 13.ab6 ab6 14.Bd3+-) 12...Rc8 13.Rc1 (13.Bd3 Bb4=) 13...Bc5 (13...Nc5 14.Nc5 Bc5 15.Bh3=) 14.Bg2 0-0 15.0-0 Re8 16.d3 (16.Rfe1 Bb4 17.Qe2 Ne4 18.Be4 Nc5=) 16...Ne4 17.Qe4 Nf6 18.Qe2 Qd6 19.Rfe1 Bb4 20.Red1 Re7 21.Ra1 Bc5 (21...g6!?=) 22.a5+= g6 23.ab6 ab6 24.Bc1 (24.Bc6 Qe6+=) 24...Kg7 25.Bg5 h6 26.Bf6 Qf6 27.Ra6 Rcc7 28.Rda1 Qd6 29.Bd5 f5 (29...Re8 30.h4+=) 30.f3 (30.Ra8 e4 31.de4 fe4 32.Rg8 (32.Be4?! d3 33.Qd3 Qd4 34.Qd4 Bd4+=) 32...Kh7 33.Raa8+-) 30...g5? (better 30...Rc8+=) 31.Ra8+- g4?? (better 31...Qf6+-) 32.fg4 e4 (32...Kh7+-) 33.Rg8 Kh7 34.Raa8 Re6 35.Rh8 Kg6 (35...Kg7 36.gf5 Ra7 37.Qg4 Rg6 38.Rag8 Kf6 39.Rg6 Ke7 40.Rg7 Kf6 41.Rh6 Ke5 42.Qe4) 36.gf5 Kf5 (36...Kg5 37.Rag8 Rg6 38.h4 Kf6 39.Rg6 Ke7 40.Qe4 Qe5 41.Qe5 Kd7 42.Qe8) 37.Qh5 (37.Qh5 Kf6 38.Rh6 Kg7 39.Qg5 Rg6 40.Rg8) 1–0. Nikolic,Jovane (1695) – Saito,Helio Tsutomu (1800), Sao Bernardo do Campo BRA, 4th Open, 2012.

6.Nf3 Nbd7 7.Be2 Bd6 8.0-0 Qc7 (8...0-0 9.d4 (9.c4 e5 10.d3 dc4 11.Nc3 Qc7 12.Ne4 cd3 13.Bd3=+) 9...a6 10.c4 (10.dc5 Nc5 11.Nc3 Qe7 12.ba6 Ba6 13.Nb5=) 10...Bb7 11.Na3 cd4 12.cd5 Bd5 13.Nc4=) 9.g3 (9.d4 0-0 (9...a6= 10.dc5 Nc5 11.Bf6 gf6 12.Na3 Ne4 13.ba6=) 10.c4 (10.dc5 bc5 11.Nc3 Ng4 12.Kh1 Bh2 13.Na2-/+) 10...Bb7 11.dc5 Nc5 12.Bf6 gf6 13.Qd4=; 9.a5 a6 (9...0-0 10.ab6 Qb6 11.Nc3 e5 12.Nh4 Re8 13.Nf5=) 10.ab6 Qb6 11.c4 0-0 12.Nc3 Bb7 13.Qc2=) 9...0-0=+ (9...e5 10.Nh4 a6 11.Nf5 0-0 12.f4 Re8 13.Na3=) 10.Ng5 (10.c4 Bb7 11.cd5 Nd5 12.Nc3 e5 13.Qc2=+) 10...e5 (10...h6 11.Nh3 e5 12.f4 e4 13.Nf2=+) 11.f4 h6 (11...e4 12.Nc3 h6 13.Nh3=+) 12.Nh3 (12.Nf3 Re8 13.fe5=+) 12...d4 (12...e4 13.Nf2=+) 13.Na3 de3 14.de3 ef4 15.ef4 Be7 16.c4 Rd8 17.Qc2 Bb7 18.Nf2 Ne8 19.Ng4 Nef6 20.Qc3 Nf8 21.Nc2 Ne6 22.Nce3 (22.Rad1 Ng4 23.Bg4 Nd4 24.Nd4 cd4=) 22...Ne4 (22...Nd4 23.Qe1-/+) 23.Qe1=+ Nd4 (23...Nd2 24.Be5 Bd6 25.Rf2=+) 24.Rd1 Rd6 25.Nd5 (better 25.Bd4 Rd4 26.Nf5 Rd1 27.Bd1=) 25...Rd5-/+ 26.cd5 Nc2 27.Bf3 Ne1 28.Be4 Bd6 (28...c4!? 29.Rfe1 c3-/+) 29.Rfe1-/+ a6 30.Ne5 ab5 31.ab5 f6 (better 31...Be5!? 32.Be5 Qd7-/+) 32.Nc4=+ Bc8 33.Ra1 (33.Be5 fe5 (worse 33...Be5 34.fe5 Qd8 35.d6+-) 34.fe5 Bg4=) 33...Ra1=+ 34.Ra1 Bd7 35.Ra8 Kf7 36.Ne3? (better 36.Bd3 Be7 37.Ra6 Bb5 38.d6 Bd6 39.Nd6 Qd6 40.Bb5-/+) 36...Bb5 37.Nf5 c4?? (better 37...Bd7-+) 38.Nd6+- Qd6 39.Ba3 (39.Ba3 Bc6 40.Bd6 Ba8 41.Bc7+-) 1–0. Norbeck,Ivar – Bengtsson,Torsten, corr SSKK 2–61, 1985.

6.f4!? =.

6.c3 a5 7.Nf3 Nbd7 8.d3 cd3 9.Bd3 Nc5 10.Be2 Be7 11.0-0 0-0 12.c4 b6 13.Nbd2 Bb7 14.Rc1 Rc8 15.cd5 Nd5 16.Nc4 Bf6 17.Ba3 (17.Nfe5 Qe7=) 17...Nb4 (17...Nc3 18.Rc3 Bc3 19.Qd8 Rfd8 20.Nb6=) 18.Nfe5 (18.Qd8 Bd8 (18...Rfd8? 19.Nb6 Rc7 20.Rc4+-) 19.Nd6 Bf3 20.Bf3 Rc7=) 18...Ne4 (better 18...Be5!? 19.Ne5 Qg5=+) 19.Bf3 Qd1 (19...Rc7 20.Ng4+=) 20.Rfd1+/- (worse 20.Bd1 Bd5=) 20...Rfd8 (20...Na2 21.Bf8 Nc1 22.Ba3+- (worse 22.Rc1 Be5 23.Ba3 Nc3 24.Ne5 Bf3 25.gf3 Ne2 26.Kf1 Rc1 27.Bc1 Nc1+-)) 21.Rd8 (21.Nd7 Nd5 22.Ncb6 Nb6 23.Rc8 Rc8 24.Nb6 Rd8+-) 21...Bd8 (21...Rd8 22.Bb4 ab4 23.Be4 Be4 24.Nc6 Bc6 25.bc6+/-) 22.Nc6 (better 22.Nf7 Be7 23.Nfe5+-) 22...Nd2?? (22...Bc6 23.bc6 Ng5 24.Bb4 Nf3 25.gf3 ab4 26.Nd6+-) 23.Nd8 (better 23.Nd2 g5 24.Nc4 Bc6 25.bc6+-) 23...Bf3? (23...Nf3 24.gf3 Rd8 25.Bb4 ab4+-) 24.Nd2+- (24.gf3 Rc4 (worse 24...Nc4 25.Bb4 Rd8 26.Rc4 ab4 27.Rb4+/-) 25.Nc6 Nd5-/+) 24...Rd8? (24...Rc1 25.Bc1 Bd1+-) 25.Nf3 Nd3 26.Rd1 (26.Rd1 Rd5 27.Kf1+-) 1-0. BeepBeepImAJeep (2765) - kilimanjaro9 (2010), lichess.org, 2016.

6.d3 Qa5 7.Qd2 (7.Bc3 Qc7 8.dc4 Ne4 9.Nf3 Nd7 10.Qd3 Ndf6 11.Nbd2 dc4 12.Nc4 Nc3 13.Qc3 Nd5) 7...Qd2 8.Kd2 (8.Nd2 cd3 9.Bd3 Nbd7= 10.Ngf3 Nc5 11.0-0 Bd7 12.Ne5 Bd6 13.Be2 0-0) 8...cd3 (8...Nbd7 9.Nf3 cd3 10.Bd3 Bd6 11.Nc3 Nc5 12.Ba3 Bd7 13.Ne5 Nce4) 9.Bd3 Nbd7 10.f3 (10.Bf6 Nf6 11.c4 (11.Nf3 Bd7 12.Nc3 Bd6 13.a5 Rc8) 11...Bb4 (11...Bd7 12.cd5 Bb4 13.Nc3 Nd5) 12.Ke2 dc4 (12...e5 13.cd5 e4) 13.Bc4 b6=; 10.Nf3 Bd6 11.Nc3 Nc5 12.Ba3 Bd7 13.Ne5 Nce4) 10...Bd6 (10...e5 11.a5-/+ (11.Ne2 Bb4 12.Nbc3 e4 13.fe4 de4) 11...Bb4 12.Ke2 0-0 13.Nh3 Re8) 11.g4 (11.Nc3 Nc5 12.Nge2 0-0 13.g4 Bd7) 11...0-0 12.Ne2 (12.g5 Ne8=+ (12...Nh5 13.Ne2 Nc5) 13.Nh3 f6) 12...Ne5 (12...h6 13.Nbc3 Ne5) 13.Nd4 (13.Be5 Be5) 13...Nd3 (13...Re8 14.g5 Nfd7 15.f4=+) 14.cd3 e5 (14...Re8 15.Rc1=+) 15.Nf5 (15.Nb3 h6=) 15...Bf5=+ 16.gf5 a6 17.Rg1 (17.Ba3 Ba3 18.Na3 Rfc8=+) 17...ab5-/+ 18.ab5 Ra1 19.Ba1 Ra8 20.Nc3? (better 20.Bb2-/+) 20...d4-+ 21.ed4 (21.Rc1 dc3 22.Bc3 Nd5-+) 21…ed4 0–1. Talbot,Nathan – Murphy,James, 2009.

6.d3 cd3 7.Bd3 Be7 8.Nf3 a6 9.0-0 0-0 10.c4 dc4 11.Bc4 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.Nc3 (14.Nbd2 Qc7+=) 14...Nb6 (14...b6!?=) 15.Qd8 Rd8 16.Bb3 Bd7 17.Nd4 (17.Rd1 Ra8=) 17...Bb4 18.Nce2 e5 19.Nc2 Bb5 20.Nb4 Be2 21.Re1 Bc4 22.Bc2 (22.Be5 Bb3 23.Bc7 Rd2 24.Bb6 Nd5 25.Nd5 Bd5=) 22...Nfd7 23.Be4 (23.f4 ef4 24.ef4 Nc5+=) 23...f6 (better is 23...Nc5!? 24.Bf5 f6-/+) 24.Bb7= Nc5 25.Bf3 Nba4 26.Nc6 Re8 (26...Rd2=) 27.Be2 (better is 27.Rc1 Bb3 28.Be2=) 27...Be2-/+ 28.Re2 Kf7 (28...Re6!? 29.Na7 Ra6-/+) 29.h3 Rc8 30.Na5 (30.Na7 Ra8 31.Nb5 Rb8-/+) 30...Ra8 (30...Nd3 31.Rd2 Rc1 32.Kh2 Nf2 33.Rf2 Ra1 34.Nc4-/+) 31.Nc6 Nb3 (31...Ra6 32.Nb4 Rb6-/+) 32.Be5? (better is 32.Ra2+=) 32...fe5-+ 33.Ne5 Kf6 34.f4 Nac5 35.Ng4 Ke7 36.Rc2 Ra5 37.Ne5 Ne4 (better is 37...Ra1 38.Kh2 Ke6-+) 38.Nc6+= Kd6 39.Na5 Nbc5?? (better is 39...Na5 40.Rc8 h5+=) 40.Nc4 (40.Nc4 Kd5 41.g4+-) 1–0. Scirocco – Putte5, Live Game Caissa's Web, 2004.

6.d4 Nbd7 7.c3 Ne4 8.Ba3 Ba3 9.Ra3 0-0 10.Nf3 f5 11.Nfd2 Ndf6 12.Ne4 Ne4 13.Be2 f4 14.Nd2 Nd2 15.Qd2 Qg5 16.0-0 Bd7 17.ef4 Rf4 18.g3 Rf5 19.Qg5 Rg5 20.Ra2 Rf8 21.Bf3 Rgf5 22.Bg2 g6 23.Re2 Kf7 24.Rfe1 Re8 25.Re5 Re5 26.Re5 Kf6 27.f4 a6 28.Bh3 ab5 29.ab5 Bb5 30.Re1 Bc6 31.Rc1 Bd7 32.Bg2 b5 33.Bf1 Rb8 34.Rb1 b4 35.Rb4 Rb4 36.cb4 Bb5 37.Be2 c3 38.Bd1 Bd3 39.Kf2 c2 40.Bc2 Bc2 41.b5 Bd3 42.b6 Ba6 43.Ke3 e5 44.Kf2 ed4 45.Ke1 Kf5 46.Kd2 Ke4 47.h3 Bb7 48.g4 Bc6 49.f5 Bb7 50.f6 Ke5 51.f7 Ke4 52.f8Q Ke5 53.Qg7 Kd6 54.Qh6 Kc5 55.g5 Kb6 56.Qh7 Kc5 57.Qg6 Kc4 58.Qh6 d3 59.Qg7 Kb3 60.Qh6 Kb2 61.Qg7 Kb1 62.Qh8 Ka2 63.Qg7 Kb1 64.Qf8 1-0. TimC (2485) - rondep (2435), Rated Bullet game, lichess.org.

6.Be2 a6 7.Nc3 g6 (better 7...e5!?=+) 8.Nf3+= Bg7 9.d3 cd3 10.cd3 0-0 11.d4 Nbd7 12.0-0 a5 13.Nd2 e5 14.e4 (better 14.Nb3+=) 14...ed4-/+ 15.Nd5 (15.Ncb1!?-/+) 15...Nd5-+ 16.ed5 Nb6?? (better 16...d3!? 17.Bg7 de2 18.Qe2 Kg7-+) 17.Qb3 (better 17.Nc4!?+=) 17...Nd5=+ 18.Bf3 (18.Rfe1 Nf4 19.Bf3 Be6-/+) 18...Nb4 (18...Be6 19.Rfe1-/+) 19.Rfe1=+ Bh6 (19...Rb8!?=+) 20.Rad1= d3 (20...Bg7 21.Ba3=) 21.Re4 (21.Ne4!? Bg7 22.Bg7 Kg7 23.Qc3 f6 24.Nc5+-) 21...Bg7 (21...Bf5 22.Qc3 f6 23.Rc4=) 22.Bg7 Kg7 23.Qb2 Kg8 24.Rc1 (24.Rf4 Qe7=) 24...Bf5 (24...Be6 25.Ree1 Nc2 26.Red1=+) 25.Rec4= Qb6 26.Rc7 Rab8 27.Re7 (better 27.Qe5=) 27...Nc6?? (27...Nc2 28.Qe5 Qd4 29.b6 Qe5 30.Re5=+) 28.Bc6?? (better 28.Qf6+-) 28...bc6= 29.Re5 (29.Qf6 Rbc8 30.h3 Qb8 31.bc6 Qb4=) 29...Rfe8 (29...cb5 30.Rb5 Qa7 31.Qf6-/+) 30.Rce1 (30.g4!? Bg4 31.Ne4=) 30...Re5-/+ 31.Re5 Qb7 (31...Qd8 32.Re1-/+) 32.Qc3=+ Rc8 33.Rc5 (33.Qa5 cb5 34.Rb5 (34.Qb5 Rc1 35.Nf1 Qb5 36.Rb5 d2 37.Rb8 Kg7-+) 34...Rc1 35.Nf1-/+) 33...Qe7 (better 33...cb5 34.ab5 a4-+) 34.Qe5?? (better 34.bc6!? Qe1 35.Nf1 Qc3 36.Rc3=) 34...Re8?? (better 34...Qe5 35.Re5 cb5-+) 35.Qe7-/+ Re7 36.Kf1? (better 36.g4 Bg4 37.b6-/+) 36...Re2-+ 37.Nb3 (37.Nb1 cb5 38.Rb5-+) 37...Rb2 38.Rc6 (38.Ke1 Rb3 39.bc6 Rb1 40.Kd2 Rb2 41.Kd1 Rf2-+) 38...Rb3 (better 38...Rb1 39.Nc1 d2 40.Ke2 dc1Q 41.Rc1 Rc1 42.Ke3-+) 39.Ke1 Rb2 (better 39...Rb1!? 40.Kd2 Rb2 41.Ke1 Re2 42.Kf1-+) 40.Rd6 h5 41.Rd4 Kg7 42.h3 Kf6 43.g4 Ke5 44.Rd8 hg4 45.hg4 Be4 46.f3 (46.Rd7 Re2 47.Kd1 Rf2-+) 46…Kf4 (46...Kf4 47.fe4 Ke3-+ (47...Ke4?! 48.g5-+); better 46...Bd5 47.Kd1 Bf3 48.Kc1 Rc2 49.Kb1-+) 0–1. Michael – Gross,Wilhelm, corr, 1978.

6.Nf3 Be7 7.d3 0-0 (7...cd3 8.Bd3 Nbd7 9.0-0=) 8.dc4+= dc4 (8...Nbd7 9.cd5 Nd5 10.Bd3+=) 9.Qd8+/- Rd8 10.Bc4 Nbd7 11.0-0 Nc5 12.Be2 b6 13.c4 (13.a5 Bb7+/-) 13...Bb7+= 14.Ne5 a6 15.Bf3 Bf3 16.gf3 ab5 17.ab5 Ra1 18.Ba1 Bd6 19.Nc6 Ra8 20.Nc3 (20.Bf6 gf6 21.Rd1 Be5+/-) 20...Nfd7 (20...Nb3 21.Bb2 Nd2 22.Rc1=) 21.Ne2 (21.Ne4!? Bf8 22.Nc5 bc5 23.Be5+/-) 21...Ne5?? (better 21...Ra4=) 22.Be5+- (22.Be5 Be5 23.Ne5+-; 22.Ne5?! Nb3 23.Bc3 Be5 24.Be5 Nd2+-) 1-0. BeepBeepImAJeep (2750) - agelar1991 (2595), lichess.org, 2020.

6.f4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nc3 Bb4 11.Be2 Bc3 12.Bc3 Qb5 13.0-0 Nbd7 14.Qa1 0-0 15.Rb1 Qa6 16.Qb2 b6 17.g4 Rd8 18.g5 Ne8 19.d3 Nc5 20.Ra1 Na4 21.Qb4 Nc3 22.Ra6 Ne2 23.Kf2 Ba6 24.Ke2 cd3 25.cd3 b5 26.Qa5 Ra8 27.Nd4 Nd6 28.Qb6 Nf5 29.Nf5 ef5 30.Qc6 Rb8 31.Qa6 g6 32.Qa7 Re8 33.Qb7 d4 34.e4 fe4 35.de4 b4 36.e5 Kg7 37.Kd3 b3 38.Qb3 Rc8 39.Kd4 Rd8 40.Ke4 Rd2 41.e6 Re2 42.Kd5 Re6 43.Qb2 Kg8 44.h4 Re8 45.f5 gf5 46.h5 Normal 1-0. ZeruHmyz (2265) - chessoholic (2195), Rated Blitz game, lichess.org, 2015.

6.Bf6 gf6 7.d3 cd3 8.Bd3=.

6.Bf6 Qf6=+ 7.Nc3 d4 (7...Bb4 8.Nge2=+) 8.Ne4 (better 8.ed4!? Qd4 9.Nf3+-) 8...Qe5= 9.Ng3 Bb4 (9...de3 10.fe3 Qc7=) 10.e4 (better 10.Nf3 Qd5 11.Nd4+=) 10...c3-/+ 11.d3 Bd7 (11...a6 12.Nf3 Qc5 13.Qc1-/+) 12.Qg4 0-0 (12...h5 13.Nf3 hg4 14.Ne5-/+) 13.Nh5 (better 13.Nf3!? f5 14.Ne5 fg4 15.Be2+= (worse 15.Ng4 a6=+)) 13...g6-/+ 14.Nf3 (better 14.Ng3 Qc5 15.e5 Qe5 16.Be2-+) 14...f5?? (better 14...Qh5 15.Qh5 gh5 16.Nd4 a6-+) 15.Qg3 (15.Qg5 Qc7 16.Nd4=) 15...Qd6 (15...Qg3 16.Ng3 (16.fg3? gh5 17.Nd4 a6-+) 16...a6 17.ba6 Na6 18.Nd4=+) 16.Qd6 (better 16.e5!? Qc7 17.Nf6 Kg7 18.Nd4+-) 16...Bd6= 17.Ng5?? (better 17.e5 Be5 18.Ne5 gh5 19.Be2=) 17...gh5-+ 18.Be2 h4 (18...a6 19.0-0-+) 19.h3 Be7 20.Nf3 Bc6 21.Ne5? (21.bc6 Nc6 Combination) 21...Be4 (better 21...Be8-+) 22.de4 fe4 23.0-0 e3?? (23...Kg7 24.Rad1 Bc5 25.a5-+) 24.f3? (24.fe3 de3 25.Rf8 Kf8 26.Bf3+=) 24...Nc6?? (better 24...a6-+) 25.Bc4?? (better 25.bc6 bc6 26.Nc6+-) 25...Ne5-+ 26.Be6 Kg7 27.Rae1 (27.f4 Nf7-+) 27…Rac8! (27...Rac8 28.Bc8 Rc8-+) 0–1. atif_zubair – Frosty2412, lichess.org, 2019.

6.Nc3 e5 7.Ba3 (7.g3 d4 8.Nce2 Nbd7-/+) 7...d4 8.Nce2 0-0 9.Nf3 (better 9.Ng3!?-/+) 9...e4-+ 10.ed4?? (10.Nfg1-+) 10...ef3 11.dc5 (11.gf3 cd4 12.Bd6 Qd6-+) 11...fe2 12.Be2 Be5 (12...Bf4 13.0-0 Re8 14.Bf3-+) 13.c3 Re8 14.0-0 (14.d4 Bc7 15.0-0 Ne4-+) 14...Kh8 (better 14...Ne4 15.Re1 Nd2 16.Qc2-+) 15.Bf3 h5! 16.c6 (16.Bh5 Nh5 Combination) 16...bc6 17.bc6 (17.d4 Bd6-+) 17...Bc7 (17...Qc7 18.d4 Bh2 19.Kh1-+) 18.Re1 (18.h3 Re6 19.d4 Nc6 20.c4-+) 18...Bg4 19.Re8 Qe8 20.Bg4 Ng4 21.h3 Qe5 (better 21...Nf6 22.Bb2-+) 22.g3 (22.hg4 Qh2 23.Kf1 Nc6 24.Bc5 hg4 25.Ke2-+) 22...Nf2! 23.Kf2 Qg3 24.Kf1 (24.Ke2 Qe5 25.Kf2 Qh2 26.Ke3 Qf4 27.Kd3 Qf5 28.Ke2 Nc6 29.Qb1 Re8 30.Kd1 Qh3 31.Kc2 Qf5 32.Kd1 Qg4 33.Kc2 Qa4 34.Kb2-+) 24...Qh3 25.Ke2 Qg2 (25...Nc6 26.Be7 Re8 27.Qb1 Re7 28.Kd1-+) 26.Kd3 Qd5 27.Kc2 Nc6 28.Qe2 (28.Rb1 Rd8 29.Kb2 h4-+) 28...Rb8 29.Kc1 (29.Rb1 Qa2 30.Rb2 Qa3 31.Rb8 Nb8 32.Qh5 Kg8-+) 29...Qh1 30.Qd1 Qd1 (30...Qe4 31.Qc2 Qd5 32.Qa2 Qh1 33.Kc2 Qe4 34.Kd1-+) 31.Kd1 g5 (31...h4 32.Kc2-+) 32.Kc2 (32.d4 Kg7-+) 32...f5 (32...h4 33.d4 Rd8 34.Rg1-+) 33.Re1 (33.d4 Kg7 34.d5 Ne5-+) 33...Kg7 34.Re6 Ne5 (better 34...Rb6 35.Kd1 h4-+) 35.Re7 Kf6 (35...Nf7 36.Rc7 h4 37.Bc5-+) 36.Rc7 g4 37.Ra7 (37.Bd6 Ra8-+) 37...g3 38.Be7 Kg6 39.Ra6 Kf7 40.Bd6 Ng4?? (40...Re8 41.a5 h4-+) 41.Bb8 h4? (41...g2 42.Ba7 h4=) 42.Ra7 (42.Rb6!? g2 43.Rb1 h3+-) 42...Ke6 43.Bg3 (43.Rh7 g2 44.Ba7+-) 43...hg3= 44.Rg7?? (44.Ra6 Kd7 45.Rb6 g2=) 44...Ke5 (better 44...g2 45.Rg6 Ke5-+) 45.Re7+= Kf4?? (better 45...Kd6 46.Re2 Nf2=) 46.Re1+- g2 (46...Kg5 47.a5 f4 48.a6+-) 47.Rg1 (better 47.a5 Ne5 48.a6 Nc4+-) 47...Kf3 (47...Kg3 48.a5 Ne5+-) 48.Kd1 (48.a5 Ne5 49.a6+-) 48...Kf2-+ 49.Re1 g1Q 50.Rg1 Kg1 51.Ke2?? (better 51.a5 f4 52.a6=) 51...f4 (better 51...Kg2 52.Kd3 f4 53.Ke4-+) 52.a5 (better 52.Kf3 Ne5 53.Kf4+-) 52...Kg2-+ 53.a6 f3 54.Ke1 f2 55.Kd1 f1Q 56.Kc2 Qa6 57.d4 (57.Kb2 Qb5 58.Kc2 Kf3 59.c4 Qc4 60.Kb2 Qd3 61.Kc1 Ne5 62.Kb2 Nc4 63.Kc1 Qd2 64.Kb1 Qb2) 0–1. invictus31 – EzPzNoobs, lichess.org, 2018.

6.c4 0-0 7.Nf3 a6 8.Be2 ab5 9.ab5 Ra1 10.Ba1 b6 11.0-0 Bb7 12.d4 dc4 13.Bc4 (13.dc5 Bc5 14.Bc4 Qe7=) 13...cd4=+ 14.Nd4 (better 14.Bd4 Qc7 15.Bf6 Bf3 16.Qf3 Qc4 17.Rd1=+) 14...Nbd7?? (14...Bh2!? 15.Kh2 Qc7 16.Kg1 Qc4-/+) 15.Be2 (better 15.Ne6!? Bh2 16.Kh2 fe6 17.Be6 Kh8 18.Qd6+/-) 15...Nc5= 16.Nd2 Qb8 17.Bf3 (better 17.f4!?=) 17...Bh2-/+ 18.Kh1 Bd6 19.Bb7 Qb7 (worse 19...Nb7 20.Nc6 Qc7 21.Bf6 gf6 22.Ne4+/-) 20.N2f3 (20.Nc6 Nd5 21.Nc4=+) 20...Rd8 (better 20...Qd5-/+) 21.Nc6= Rd7 22.Bf6 gf6 23.Nfd4 Bb8 24.Qh5 Qc7 25.g3 Rd5 26.Qh4 Rg5 27.Nf3 Rg6 28.Kg2 Kg7 29.Rh1 h6 30.Rh3 f5? (30...Qd6 31.Qh5 Nd3 32.Kf1=) 31.Qd4 (31.Nfe5 Rf6+=) 31...e5?? (better 31...f6=) 32.Nfe5+- Rf6? (32...Rd6 33.Qh4 Qb7 34.Nf3 Rc6 35.bc6 Qc6 36.Kg1+-) 33.Nd3 (33.Nc4 Ne6 34.Qb2 Qb7+-) 33...Ne6? (33...Nd3 34.Rh6! Qd6 35.Rf6 Qd4 36.ed4 Kf6 37.Nb8 Ne1 38.Kf1 Nc2+/-) 34.Qb2 Qb7 35.Nf4 (better 35.Ndb4 Nf8 36.Nd5 Nd7 37.Nf6 Nf6+-) 35...Bf4 36.gf4 Nc5?? (36...Nf8 37.Rh6! Ng6+-) 37.Rg3 Kh7 (37...Kf8 38.Qf6 Qc6 39.bc6 Ne6 40.c7 Nf4 41.ef4 Ke8 42.c8Q) 1-0. BeepBeepImAJeep (2715) - JafarliB (2615), lichess.org, 2020.

6.c4 0-0 7.Nf3 b6 8.Be2 Bb7 9.0-0 dc4 10.Bc4 Nbd7 11.d4 Qc7 12.Be2 (12.dc5!? bc5 13.Nbd2=) 12...cd4=+ 13.Bd4 (13.ed4 Rfc8=+) 13...e5-/+ 14.Bb2 Rac8 (14...e4!? 15.Nd4 Bh2 16.Kh1 Bd6-/+) 15.h3=+ Nc5 16.Nbd2 Rfd8 17.Rc1 Qe7 18.Qe1 (better 18.Bc4!?=+) 18...Na4-+ 19.Ba1 Bb4 20.Rc8 Rc8 21.Qb1? (21.Qd1 Nc3 22.Bc3 Bc3-+) 21...Ba5?? (better 21...e4-+) 22.Nc4 Bc3 (better 22...Bf3!? 23.gf3 Nc3 24.Bc3 Bc3-/+) 23.Nce5 Ba1 24.Qa1 Nc3 25.Bc4 Nce4 (better 25...Bf3 26.Qc3 Bd5=) 26.Bf7+/- Kf8 27.Qa2?? (better 27.Nd4!? Ng5 28.Bb3+-) 27...Nd6 (27...Nc3!? 28.Qa7 Ra8 29.Qb6 Bf3 30.Nf3 Kf7+=) 28.Be6+= Bf3 29.Nf3 (29.gf3? Re8 30.Nc6 Qe6 31.Qe6 Re6 32.Na7 Re5-+) 29...Nfe4?? (better 29...Rc5+=) 30.Bc8+- Nc8 31.Qc4 Nc5 (31...Qe8 32.Nd4 Nc5 33.Rd1+-) 32.Rd1 Nd6 (32...h6+-) 33.Qf4 Qf6 (33...Nf7 34.Qb8 Qe8 35.Qa7+-) 34.Qd6 Qd6 35.Rd6 Ke7 36.Rc6 Kd7 37.Nd4 Ne6 (37...Ne4+-) 38.Re6 Kc7 39.Re7 (39.Re7 Kd6 40.Rg7+-) 1-0. BeepBeepImAJeep (2615) - bokac (1940), lichess.org, 2016.

6.c4 0-0 7.Nf3 b6 8.Be2 Bb7 9.0-0 h6 10.d4 cd4 11.Nd4 (11.Qd4!? Nbd7 12.Nc3=) 11...dc4=+ 12.Bc4 Bc5 (better 12...Bh2!? 13.Kh2 Qc7 14.Kg1 Qc4-/+) 13.Be2 Nbd7 14.Bf3 Bf3 15.Qf3 (worse 15.gf3 a6=+) 15...Rc8 (15...Bd4!? 16.Bd4 Rc8=) 16.Nc6+/- White plans a5 16...Qc7 17.Nc3 (17.Rc1!?+=) 17...Ne5= 18.Ne5 Qe5 19.a5 (19.Rfd1 Bd6 20.Qh3 Nd5 21.Nd5 Qb2=+) 19...Bb4 (better 19...Bd6 20.Qg3 Qg3 21.hg3 ba5-/+) 20.Na4+= Qd5 (better 20...Qb5!? 21.Bf6 gf6 22.ab6 ab6+=) 21.ab6+- ab6 22.Nb6 Qb5? (better 22...Qf3 23.gf3 Rb8+/-) 23.Nc8+- Rc8 24.Bf6 gf6 25.Rab1 f5 (25...Rc4 26.Qf6 Qg5 27.Qf3+-) 26.Qg3 (26.Qf4 Rc4 27.Qh6 Qe5+-) 26...Kf8 (26...Kh7 27.Rfd1+-) 27.Qf4 Rc4 28.Qh6 Ke7 29.Qg5 Kf8 (29...Ke8 30.Rfd1 Qb6 31.Qg8 Ke7 32.Ra1+-) 30.h3 (better 30.Rfd1 Rc8 31.Qh4 Rb8+-) 30...Qd5 (30...Ke8 31.Rfd1 Qb6 32.Qg8 Ke7 33.Ra1+-) 31.Qh6 (better 31.Rfd1!? Qd1 32.Rd1 Be7 33.Qh6 Kg8+-) 31...Ke7 (31...Ke8 32.Qh8 Ke7 33.Rfd1+-) 32.Qh8 (better 32.Rfd1 Bd2 33.Rb8 Rc7 34.Qf8 Kf6+-) 32...Rc2 (32...Qb7+-) 33.Rb4 Qe5 34.Qe5 f6 (34...Rc7 35.Qc7 Kf6 36.Qd8 Kg6 37.Qg8 Kf6 38.f4 e5 39.Rb6 Ke7 40.Rd1 ef4 41.Qd8) 35.Rb7 Kd8 36.Qd6 Kc8 (36...Ke8 37.Qe7) 37.Qd7 1-0. BeepBeepImAJeep (2745) - nekitka0525 (2360), lichess.org, 2019.

6.c4 0-0 7.Nf3 Re8 8.Be2 Nbd7 9.0-0 Nb6 (9...e5 10.d3=+) 10.cd5 ed5 11.d4 cd4 (11...c4 12.a5 Nbd7 13.Nc3=+) 12.Nd4 (12.Bd4!? Ne4 13.Nbd2+=) 12...Nc4=+ 13.Bc4 dc4 14.Nd2 Qc7 (14...c3 15.Bc3 Qc7 16.Rc1 Bh2 17.Kh1=) 15.h3 c3 16.Rc1 Bb4 (16...Bh3!? 17.Rc3 Qd7=) 17.Nb1 (17.Qb3 Qe5 18.Bc3 Bd6+/-) 17...Nd5 (17...Qe5 18.Nc3 a6 19.Qd3+/-) 18.Qb3 (18.Nc3 Qd6+/-) 18...Qe5 19.Nc3 Nc3 20.Bc3 (20.Qb4 Na2 21.Nf3 Nb4 22.Ne5 f6+/-) 20...Bc3 (20...Bd6 21.Nf3 Qe7 22.Qc2+/-) 21.Qc3 Qg5 22.Nf3 Qh5 (better 22...Qg6 23.Kh2 a6+/-) 23.Nd4 Qg6 (23...Qg5 24.Qc5 Qg6+/-) 24.Kh2 Bd7 (24...Qd6 25.Kh1+/-) 25.Qc7+- Rad8 (25...Bc8+-) 26.Qb7 Qd6 (26...Re7 27.Rfd1 (27.Qa7? Bh3 28.gh3 Ra7-+) 27...Qd6 28.f4 Re3 29.Ne6 Qe6 30.Rd7+-) 27.Kg1 Qg6 28.Qf3 (28.Qa7 Bh3 29.Qb7 Re4 30.Qe4 Qe4 31.gh3 Qg6 32.Kh2 Qd6 33.f4 Qa3+/-) 28...a6 29.Nc6 Rc8 (29...Bc6 30.Rc6 Re6 31.Re6 fe6 32.ba6+-) 30.Rfd1 Be6 (30...Qe6+-) 31.Ne7 Re7 (31...Kf8 32.Ng6 hg6 33.Rc8 Bc8+-) 32.Rc8 Bc8 33.Rd8 (33.Rd8 Re8 34.Re8) 1-0. BeepBeepImAJeep (2710) - Dondimi (2655), lichess.org, 2020.

6.c4 b6 7.Nf3 Bb7 8.Be2 Nbd7 9.0-0 0-0 10.cd5 Nd5 11.d4 Qe7 12.Nbd2 Rfd8 13.Nc4 Bc7 14.Qb3 (14.a5 Nb4=) 14...cd4 15.Bd4 Nc5 (15...e5 16.Bb2=+) 16.Qb2= f6 17.Rfc1 Rac8 18.a5 Nd7 (18...Rd7 19.Qc2=) 19.ab6+= ab6 20.Ra7 Rb8 21.g3 (21.Ncd2!? Nc5 22.Qc2+=) 21...e5= 22.e4 ed4 23.ed5 Nc5 (23...Be5 A) 24.Nce5?! fe5 25.Rc6 Kh8= (25...Bc6? 26.dc6 Rbc8 27.Bc4 Kh8 28.Qe2+-); B) 24.Nfe5?! fe5 25.Bf3 e4=; C) 24.d6 Bd6 25.Nd4+/-) 24.Nd4 Rd5 25.Ne3 Rdd8 26.Rb7 Rb7 27.Bc4 (27.Nc6 Qe8 28.Nd8 Bd8 29.Qa2 Kh8+/-) 27...Kh8 28.Nc6 Qe8 29.Nd8 Qd8 30.Rd1 Qe8 (30...Bd6 31.Qe2 Rd7 32.Nd5+=) 31.Qd2 Rb8 32.Re1 Rd8 (32...Qe4!?+=) 33.Nd5+/- Qd7 34.Qe3 Rf8 35.Qe7 (35.Qa3 Qg4 36.Be2 Qd7+=) 35...Qe7 (35...Bd6 36.Qd7 Nd7 37.Kg2+=) 36.Re7+/- Bd8 37.Ra7 h5 (37...g6 38.Kg2+/-) 38.h4 (38.Ra8 Nd7+-) 38...g5 (38...Kh7 39.Ra8 Nd7 40.Bd3 g6 41.Ra7+-) 39.Be2 gh4 40.Nf4 Rg8 41.Bh5 (worse 41.Nh5 hg3 42.Ng3 Rg7+/-) 41...hg3 (41...Rg7 42.Ra8 Rd7 43.Ng6 Kg7 44.Nh4+- (44.gh4?! Rd4=)) 42.Ng6 Rg6 43.Bg6 gf2 44.Kf2 f5 45.Bf5 Bh4 (45...Bf6 46.Ke3 Bc3 47.Be4+-) 46.Kf3 (46.Kf1 Bg3+-) 46...Bf6 (46...Be1 47.Be4+-) 47.Ra8 (47.Ra6 Kg8+-) 47...Kg7 48.Rb8 Na4 49.Bc2 Nc3 50.Rb6 Bd4 (50...Kf7 51.Bb3 Kg7 52.Rb7 Kh6 53.Kg4+-) 51.Rb7 (better 51.Rg6!? Kf7 52.b6 Nb5+-) 51...Kf6 52.Rd7 Nb5 (52...Be5 53.b6 Ke6 54.Rd8+-) 53.Ba4 Nc3 54.Rd4 Na4 (54...Ke5 55.Rc4 Nd5 56.Bb3+-) 55.Ra4 (55.Ra4 Ke5 56.Ra5 Kd4 57.Rf5 Kc3 58.Ke3 Kc4 59.Rg5 Kb4 60.Kd3 Kb3 61.Rg4 Kb2 62.Rb4 Ka3 63.Kc3 Ka2 64.Ra4 Kb1 65.Ra5 Kc1 66.Ra1) 1-0. Timmermans,Mark (2385) - Shuvalov,E (2180), Titled Tuesday 6th Apr, 2021.

6.c4 b6 7.Nf3 dc4 8.Bc4 0-0 9.Be2 Nbd7 (9...Bb7 10.0-0=) 10.0-0 Bb7 11.Nc3 Qe7 12.d4 cd4 13.Nd4 Nc5 14.Bf3 Bf3 15.Qf3 e5 (15...Qc7 16.h3=) 16.Nc6 Qe6 17.Rad1 (17.e4 Rfc8+=) 17...e4= 18.Qe2 Nd3?? (18...a6 19.Qd2 Bc7 20.Ba3=) 19.Ba1 (19.Ne4 Nb2 20.Rd6 (20.Nd6?! Nd1 21.Rd1 Ne4=) 20...Qe4 21.Qb2+-) 19...Nd5? (better 19...Nc5=) 20.Ne4!+- N5b4 (20...Qe4 21.Qd3 Double attack (21.Qd3 Decoy; 21.Rd3 Remove defender)) 21.Nd6 Qd6 22.Nb4 Qb4 23.Qd3 Qa4 24.Qd4 (24.Qf5 Qh4+-) 24...Qd4 25.Bd4 f6 26.Rc1 (26.Ra1 Rf7+-) 26...Rfd8 (26...Rad8 27.Rc7 Rf7 28.Rf7 Kf7 29.Ra1+-) 27.Rc7 a6 28.ba6 Ra6 29.g3 b5 30.Rb1 (30.Rb7 Rad6+-) 30...Ra5 (30...Rb8 31.Rd7 Ra4 32.Kg2+-) 31.Rb7 Rc8 32.R7b5 Rb5 33.Rb5 Rc7 34.Kg2 Kf7 35.Ra5 h5 (35...h6 36.Kf3+-) 36.Ra7 (36.Rh5!? Ke6+-) 36...g6 (36...Ra7 37.Ba7 Ke6+-) 37.Rc7 (37.Rc7 Ke6 38.Rc6 Kd7 39.Rf6+-) 1-0. BeepBeepImAJeep (2765) - Ihsan1988 (2395), lichess.org, 2020.

6.c4 d4 7.Nf3 de3 8.fe3 0-0 9.Be2 b6 10.0-0 Bb7 11.d4 Bf3?? (better 11...Qc7 12.Qb3 Nbd7=) 12.Bf3+- (12.Rf3?! Qc7 13.Rh3 Nbd7=; 12.gf3?! cd4 13.Bd4 e5=) 12...cd4?? (better 12...Nbd7 13.Ba8 Qa8+-) 13.Ba8 Nbd7 14.Bc6 (14.Qd4?! Bc5 15.Qc3 Qa8+-) 14...Ne5 15.Qd4 Nc6 (15...Neg4 16.Kh1+-) 16.bc6 e5 17.Qh4 Qc7 18.Nc3 1-0. BeepBeepImAJeep (2865) - ChezZuxX (1865), lichess.org, 2016.

6.Nf3 Nbd7 7.c4 0-0 8.d4 a6 9.Nbd2 b6 10.Ne5 a5 11.Ne4 Bb7 12.cd5 0.13/0 12...Bd5 0.13/0 13.Kd2 0.18/0 13...cd4 0.15/0 14.Ke2 0.05/0 14...Rc8 0.02/0 15.Ng3 0.14/0 15...Ne5 0.00/0 16.h3 0.02/0 16...Qe7 0.00/0 17.Ke1 0.02/0 17...Ba3 0.00/0 18.Ra2?! 0.57/0 18...Bc6 0.68/0 19.Ba1 0.69/0 19...Ne4? 0.99/0 20.Rg1? -0.66/0 20...Ra8? 0.22/0 21.Rd2 0.18/0 21...Nd7 0.14/0 22.Qf3 0.48/0 22...Nb8?! 0.43/0 23.Bc3?! 0.44/0 23...Ng5? 0.91/0 24.Bd3 0.87/0 24...Nd7 1.23/0 25.Bg6 1.02/0 25...Bd6? 2.68/0 26.Ba1? 0.82/0 26...Rae8 0.84/0 27.Qf4?! 0.00/0 27...Bf4?! 0.86/0 28.Bc2 0.77/0 28...Bb8? 2.03/0 29.Kd1? 0.69/0 29...f5 0.78/0 1-0. ZeruHmyz (2260) - newObject (2170), Rated Blitz game, lichess.org, 2015.

6.Nf3 Nbd7 7.Be2 e5 8.0-0 e4 9.Ng5 (9.Nh4 Ne5=+) 9...Be5 (9...Nf8 10.f3 h6 11.Nh3 Bh3 12.gh3=+) 10.Be5= Ne5 11.d4 Ng6 12.dc5 h6 13.Nf7 Kf7 14.f3 Qe7 15.Nc3 Qc5 16.Qd4? (16.Nd5 Bf5 17.fe4 Be4 18.Bf3 Bc2 19.Qe2 Nd5 20.Bd5 Ke7 21.Bb7=) 16...Qd4-+ 17.ed4 e3 18.Rfe1 Re8 19.Ra3 Bf5 (19...Nh4 20.Nd1-+) 20.g4 Bd7 21.Bd3? (better 21.Nd1-+) 21...Nh4 22.Be2 Rac8 23.Nd1 (23.Kf1 Re7-+) 23...Rc2 24.Re3 Re3 25.Ne3 Ra2 26.Bd1 Rd2 27.h3 a6 28.Re2 (28.ba6 ba6 29.a5 Rd4-+) 28...Rd4 29.Kf2 ab5 30.ab5 Bb5 31.Rb2 Bc6 32.Kg3 g5 33.Bb3 Rd3 34.Kf2 Kf8 35.Bc2 (35.Ke2 Bb5 36.Kf2 d4-+) 35...Rd2 36.Kf1 Nf3 37.Nf5 Nd7 38.Nh6 (38.Rb3 Nh2 39.Ke1 Rc2 40.Ra3-+) 38...Nde5 39.Ra2 Bb5 (39...Bb5 40.Bd3 Bd3) 0–1. Pieleck,Rudi – Baumann,Heinz, RSX9E – A00 – Sokolsky–1, 2002.

6.f4 0-0 7.Nf3 Re8 8.Be2 Nbd7 9.d4 (9.0-0!?=) 9...cd4=+ 10.Qd4 e5 11.fe5 Ne5 12.Nbd2 (12.Nc3 Bc7 13.Nd1 Neg4-/+) 12...Ne4 (12...Neg4!? 13.Nf1 Qc7-/+) 13.Ne4 Nf3 (13...de4? 14.Ne5 Qf6 15.Nc4 Qh4 16.Kf1+-) 14.Bf3 (14.gf3 Be5 15.Qb4 Qh4 16.Kd2 Bb2 17.Qb2 de4-/+) 14...Be5 15.Qb4 de4 16.Be5 ef3 (16...Re5?! 17.Qd4 Qh4 18.g3=) 17.Bd4? (better 17.Qf4!? f6 18.Bd4 fg2 19.Rg1-/+) 17...fg2-+ 18.Rg1 Bh3 (18...Qh4!? 19.Kd1 Bg4 20.Kc1 Qh2 21.Kb2-+) 19.0-0-0 a6 (better 19...Qc7!?-+) 20.Bg7=+ Qe7 (20...Kg7? 21.Rd8 Red8 22.Qf4+-) 21.Qb2 (21.Qe7!? Re7 22.Bd4 ab5 23.Rdf1=+) 21...Qe3-+ 22.Kb1 ab5 23.Bd4 Qf3 (23...Qe2 24.Rd3 Qe1 25.Qc1 Qb4 26.Bb2 Bf5 27.Qg5 Bg6=) 24.Rd3= Qf1 25.Ka2?? (better 25.Qc1 Qc1 26.Kc1=) 25...Ra4 (25...Be6 26.Qb3 Ra4 27.Kb2 Bb3 28.Rg3 Kf8 29.Bc5 Re7 30.cb3 Qf6 31.Rc3 b4 32.Bb4 Rb4 33.Rg2 Re3 34.Rgc2 Rc3 35.Rc3 Rh4 36.Kc2 Qf2 37.Kc1 Rh2 38.Rc8 Kg7 39.Rg8 Kg8 40.Kd1 Qd2) 26.Ra3 (26.Qa3 Bg4 27.h3-+) 26...Be6 27.Qb3 Ra3 (27...Bb3 28.Kb2 Ra3 29.Bf2 Ra2 30.Kc3 Qc4 31.Kd2 Qc2) 28.Ka3 Bb3 29.Rf1 gf1Q 30.Kb3 (30.Bf2 Ra8 31.Ba7 Ra7 32.Kb3 Qc4 33.Kb2 Ra2 34.Kc1 Qc2) 30...Qe2 (30...Qc4 31.Ka3 Ra8 32.Ba7 Ra7 33.Kb2 Ra2 34.Kc1 Qc2) 31.Bc3 (31.Bc5 Qc4 32.Ka3 Ra8 33.Ba7 Ra7 34.Kb2 Ra2 35.Kc1 Qc2) 31...Qe4 (31...Qc4 32.Kb2 Rc8 33.Ka1 Qc3 34.Ka2 Ra8 35.Kb1 Ra1) 32.Kb2 Qe6 (32...b4 33.Bd2 Ra8 34.c3 Qd5 35.Kc1 Ra2 36.Be1 Qd3 37.cb4 Qc2) 33.Bb4 Qc4 34.Bc3 (34.Kb1 Qb4 35.Kc1 Re1) 34...Rc8 35.Bf6 (35.h3 Qc3 36.Ka2 Ra8 37.Kb1 Ra1) 35...Rc6 (35...Qc2 36.Ka3 Ra8 37.Kb4 Qc4) 36.Be5 (36.Bg7 Qc2 37.Ka3 Ra6 38.Kb4 Qc4) 36...b6 (36...Qc2 37.Ka3 Ra6 38.Kb4 Qc4) 37.Bh8 (37.Bg7 Qc2 38.Ka1 Rc7 39.Bb2 Ra7 40.Ba3 Ra3) 37...Qc2 38.Ka3 (38.Ka1 Rc7 39.Bb2 Ra7 40.Ba3 Ra3) 38...b4! 39.Kb4 (39.Kb4 b5 Mate attack) 39...Qc4 (39...b5 40.Kb5 Qc4 41.Ka5 Ra6) 40.Ka3 Qb5 (40...b5 41.Bf6 b4 42.Kb2 Qc2 43.Ka1 Ra6) 41.Ka2 (41.Be5 Rc4 42.h3 Ra4) 41...Rc4 (41...Rc2 42.Ka3 Rc4 43.Bf6 Ra4) 42.Bb2 Ra4 (42...Rc2 43.Ka3 Qb2 44.Ka4 Rc4) 43.Ba3 (43.Kb1 Qd3 44.Kc1 Rc4 45.Bc3 Rc3 46.Kb2 Rc2 47.Ka1 Qd1) 43...Qb4 44.Ka1 (44.h3 Ra3) 44...Qa3 (44...Ra3) 45.Kb1 Qc5 (45...Rc4 46.h3 Rc1) 46.Kb2 Rb4 47.Ka3 (47.Ka2 Qa5) 47…Qa5 0-1. cabbage9 (2840) - zsolti_83 (2660), Rated Bullet game, lichess.org, 2020.

7.d3 Nbd7 8.Nbd2 a6 9.c4 ab5 10.ab5 Ra1 11.Qa1 Qc7 12.h3 b6 13.Be2 Bb7 14.Bc3 e5 15.0-0 d4 16.ed4 (16.Bb2 Ra8 17.Qb1 Be7=+) 16...ed4 17.Bb2 Ra8 18.Qb1 Nf8 19.Bc1 Ng6 20.Ng5 Nf4 21.Bf3 h6 22.Nge4 Be4 (22...Ne4 23.Ne4 Ng6 24.g3-/+) 23.Be4? (better 23.Ne4!? Ne4 24.Bf4=) 23...Ne2-/+ 24.Kh1 Nc3 25.Qc2 Re8 (25...Ra2 26.Qb3 A) 26...Nfe4?! 27.Ne4 Qe7 A1) 28.Nc3? Rf2 29.Kg1 Rf1 30.Kf1 Qf6 (30...dc3?! 31.Qc3 Bg3 32.Qd2=+) 31.Ke2 dc3-+; A2) 28.Nd6 Qd6 29.Bb2=; B) 26...Ra1-/+) 26.Nb1?? (better 26.Bc6 Re6 27.Bb2=) 26...Nfe4-+ (26...Re4?! 27.de4 Nce4 28.Nd2=) 27.de4 Ne4 28.Qd3 (28.Nd2 Qe7-+) 28...Re6 (better 28...Qe7!? 29.Kg1 Qe5 30.f4-+) 29.Nd2 Nd2 (29...f5 30.Kg1-+) 30.Bd2 Bf4 31.Bf4 Qf4 32.Kg1 Qe4 33.Rd1?? (better 33.Qe4 Re4 34.f3-+) 33...Qd3 34.Rd3 Re1 35.Kh2 Rc1 36.Kg3 (36.Rd2-+) 36…Rc3 0–1. Zalewski,Andrzej – Kotarski,Bartosz, IV Turniej Weekendowy Lomza Poland, 2013.

8.Bf6 Qf6 9.Nc3 A) 9...Qf5 10.d4 dc4 11.Bc4 cd4 12.Qd4 Bc5 (12...Rd8= 13.Rd1=) 13.Qd3=; B) 9...dc4 10.Ne4 Qe7 11.Bc4 (11.Nd6 Qd6 12.Bc4 Nd7 13.a5= Bc7 B1) 12.0-0 Nd7= 13.Rc1= (13.Qc2=); B2) 12.Rc1 Nd7 13.Qc2=; C) 9...d4 10.Ne4 Qe7 11.Bd3 Bc7 12.0-0 e5= 13.ed4= (13.Ng3=).

9.Be2 Qe7 10.0-0 A) 10...Bg4 A1) 11.a5 a6 12.Qa4 Nbd7 13.Nc3 c4 14.Qc2 Nc5+=; A2) 11.Qc2 Nbd7 12.Rc1 a6 13.Na3 a5 14.h3 Bf3+=; A3) 11.Re1 Nbd7 (11...Qe6 12.a5 Nbd7 13.Nc3 Rac8 14.d3 Re7=; 11...a6 12.Nc3 b6 13.Qc2 c4 14.d3 Bf5=; 11...a5 12.Nc3 Nbd7 13.Rc1 Rad8 14.h3 Bf5=) 12.Nc3 a6 13.d3 Bc7 14.h3 Bf5+=; A4) 11.d4 c4 12.Ba3 Ba3 13.Na3 Ne4 14.Qc2 Bf5+=; A5) 11.h3 Bf5 12.Nc3 Nbd7 13.a5 Rac8 14.d3 Qe6=; B) 10...a6 11.Nc3 Bg4 12.h3 Bf5 13.a5 ab5 14.Nb5 Nc6=; C) 10...Bf5 C1) 11.a5 Nbd7 (11...a6 12.Nc3 Nbd7 13.d3 Bg4 14.Re1 d4=) 12.Nc3 Rac8 13.a6 b6 14.Rc1 Ne5+=; C2) 11.Nc3 Nbd7 12.a5 (12.d3 a5 13.Rc1 Bg4 14.Re1 Rad8+=) 12...Rac8+= 13.a6 b6 14.Rc1 Ne5+=.

9.Be2 Bf5 10.0-0 A) 10...Nbd7 A1) 11.a5 b6 (11...Qe7 12.Nc3 Rad8 13.d4 c4 14.Nh4 Be6+=; 11...a6 12.Nc3 ab5 13.Nb5 Be7 14.Qa4 c4+=) 12.Nh4 Be6 13.f4 d4 14.f5 Bd5+=; A2) 11.d3 Qe7 (11...Qa5 12.Bc3 Qb6 13.Qd2 Qc7 14.Rc1 a6=; 11...a6 12.Nc3 Ne5 13.a5 Qb8 14.Kh1 Be6=) 12.Nc3 Rad8 13.Rc1 Rc8 14.a5 Bc7+=; B) 10...a6 11.Nc3 B1) 11...Qa5 12.d3 (12.Qb3 c4 13.Qd1 Nbd7 14.Nd4 Be6=) 12...Nbd7+= 13.Qb3 Be6 14.Ng5 d4=; B2) 11...Nbd7 12.d3 Ne5 13.a5 Qb8 14.h3 Be6=; B3) 11...Bc7 12.d3 Qd6 13.a5 d4 14.Ne4 Ne4=; B4) 11...b6 12.ba6 Na6 13.Nb5 Nb4 14.d3 Bb8=; C) 10...Qe7 C1) 11.Nc3 a5 (11...Nbd7 12.a5 Rac8 13.a6 b6 14.Rc1 Ne5+=) 12.d3 Nbd7 13.Rc1 Ne5 14.Re1 Rad8+=; C2) 11.a5 a6 (11...Nbd7 12.Nc3 Rac8 13.a6 b6 14.Rc1 Ne5+=) 12.Nc3 Qe6 13.d3 Bg4 14.ba6 ba6+=.

9.Be2 Bf5 10.a5 A) 10...a6 11.b6 (11.0-0 ab5 12.Bb5 Re6 13.Ng5 Re7 14.Qa4 Ne4+=) 11...Nc6 (11...Qe7 12.0-0 Nc6 13.Re1 Rac8 14.d3 d4+=) 12.0-0 Qe7 13.Re1 Rac8 14.d3 d4+=; B) 10...d4 11.Bc4 Nbd7 12.0-0 Ne5 13.Ne5 Be5 14.f4 Bc7=; C) 10...Bc7 11.Bf6 Qf6 12.d4 c4 13.0-0 Nd7 14.Nc3 Qd6+=.

9.Be2 Bg4 10.0-0 Nbd7 11.Nc3 Qc7 12.h3 A) 12...Bf5= 13.d3 (13.a5 Rad8 14.a6 Nb6 15.Na4 Nfd7 16.d3=; 13.Re1 Qa5 14.d3 Rac8 15.Qd2 Ne5 16.Rad1+=) 13...Ne5 14.d4 Nf3 15.Bf3 Rad8 16.dc5=; B) 12...Bf3 13.Bf3 d4 14.Nd5 Nd5 15.Bd5 Nb6 16.Bb3=.

9.Be2 Bg4 10.0-0 Nbd7 11.Nc3 Qe7 12.Re1 A) 12...Rac8 13.a5 (13.d3 d4 14.ed4 cd4 15.Ne4 Ne4 16.de4+=) 13...Qe6 14.a6 b6 15.d3 Qf5 16.h3=; B) 12...a6 13.d3 (13.a5 d4 14.ed4 cd4 15.Na2 ab5 16.Nd4-/+) 13...Bc7 14.h3 Bf5 15.Qc2 ab5 16.ab5=; C) 12...Qe6 13.a5 (13.d3 Bf3 14.Bf3 Ne5 15.Be2 Neg4 16.g3+=) 13...Rac8 14.d3 Re7 15.a6 b6 16.Rc1=; D) 12...a5 13.Rc1 (13.d3 Rad8 14.Rc1 Nb6 15.Nd2 Qe6 16.Bg4+=; 13.Rb1 Nb6 14.d3 Rad8 15.h3 Bf5 16.Rc1+=) 13...Rad8 14.h3 Bf3 15.Bf3 Qe5 16.Kf1=; E) 12...Nb6 13.d3 (13.d4 cd4 14.Qd4 Bf3 15.Bf3 Be5 16.Qd3+=) 13...a5 14.ba6 ba6 15.Rb1 Rab8 16.Qc2+=; F) 12...Bf5 13.a5 (13.d3 Ne5 14.Rc1 Nf3 15.Bf3 Rad8 16.Qd2+=) 13...Rad8 14.a6 b6 15.d4 c4 16.Qc1=; G) 12...Rad8 13.d3 c4 14.dc4 dc4 15.Bc4 Ne5 16.Ne5+=.

9.Be2 Bg4 10.0-0 Nbd7 11.Nc3 Qe7 12.h3 A) 12...Bf5 13.a5 (13.d3 Rac8 14.a5 Be6 15.Ng5 Rc7 16.Ne6=; 13.Re1 Rac8 14.a5 Ne5 15.d4 Nf3 16.Bf3=; 13.Rc1 a6 14.ba6 ba6 15.Ba3 d4 16.ed4-/+) 13...Rac8 14.d3 Be6 15.Ng5 Rc7 16.Ne6=; B) 12...Bf3 13.Bf3 Qe5 14.g3 Qe6 15.Bg2 c4 16.Ne2=; C) 12...Be6 13.a5 Rac8 14.Qc2 Ne5 15.Ne5 Be5 16.f4=.

9.Be2 Bg4 10.0-0 Nbd7 11.d3 b6 (11...Qe7 12.h3 Bh5+=) 12.Nbd2 (12.Nc3 a6=) 12...Qe7 (12...a6+=) 13.h3 Bh5 14.Nb3 (14.Qb3 d4 15.ed4 Bf4+=) 14...Rac8 (14...d4 15.e4-/+) 15.Rc1 Bf3 16.Bf3 Ne5 17.Be5 Be5 18.Nd2 d4 (18...a6 19.Qb3 ab5 20.Qb5+=) 19.Bc6 Red8 20.e4 Bf4 21.Rc2 Bd2 22.Qd2 Nd7 23.Qf4 (23.a5 Ne5 24.Bd5 Re8+=) 23...Nb8 (better is 23...Ne5 24.Rd1 Nc6 25.bc6 Rc6-/+) 24.Bd5= Nd7 25.Bc4 Ne5 26.Qf5 Nc4 27.Rc4 Rf8 28.e5 Rce8 29.Re1 f6 30.e6 Rd8 31.Re4 (better is 31.Rc2!?=) 31...Rd6 32.f4?? (32.Re2!? Re8 33.a5-/+) 32...Re8 (better is 32...g6 33.Qg4 f5-+) 33.Qh5 Re6 34.f5? (better is 34.Re6 Qe6 35.Kh2-+) 34...Re4 35.de4 Qe4 36.Rc1 (36.a5 Qe3 37.Kh1-+) 36...Qe3 37.Kh2 Qf4 38.Kh1 (38.g3 Qd2 39.Kg1 Qc1 40.Qd1 Qd1 41.Kf2 Qd2 42.Kf3 Qe2 43.Kf4 Qe4) 38...Qc1 39.Kh2 (39.Qd1 Qd1 40.Kh2 Re2 41.Kg3 Qd3 42.Kh4 Rg2 43.a5 Qe4 44.Kh5 Rg5) 39...Qf4 40.g3 0–1. GULP – Bsh4Brns, Live Game Caissa's Web, 2004.

6.c4 a6 7.d3 Be7 8.Nf3 ab5 9.ab5 Opening the a–file gets White a lot of play 9...Ra1 10.Ba1 Qa5 (10...dc4 11.dc4 0-0 12.Bd3+=) 11.Bc3= Qa7 (11...Qb6 12.Ne5=) 12.Be2 0-0 (12...dc4 13.dc4 0-0 14.0-0+=) 13.0-0 Rc8 (13...dc4 14.dc4 Rd8 15.Bd3+=) 14.Nbd2 (14.Ne5 Rd8 15.Bh5 Be8=) 14...Be8 (14...dc4 15.dc4 Qa2 16.Qa1 Qa1 17.Ra1+-) 15.Qa1 (15.Qb3 dc4 16.Nc4 Bd7+-) 15...Qa1 (15...Qb6 16.Be5+=) 16.Ra1 Nbd7 (16...dc4 17.dc4 b6 18.Ra7+-) 17.Ra7+- b6 (17...Rb8 18.Ne5+-) 18.Ne5 Bd6 19.Nd7 Nd7 20.f4 (20.Bf3 Ne5 21.Be2 Nd7+-) 20...Bb8 (20...d4 21.ed4 cd4 22.Bd4 Bf4 23.Nb3+-) 21.Ra6 (21.Ra8 g5+-) 21...Rc7 (21...d4!? 22.ed4 Bf4+=) 22.Bf3+- dc4 23.dc4 Ra7 (23...f6 24.Bc6+-) 24.Ra7 (24.Bc6 f6+-) 24...Ba7 25.Bc6 (25.Ne4 Bb8+-) 25...Kf8 (25...Bb8 26.Kf2+-) 26.Ne4 (better 26.Kf2+-) 26...Ke7 (better 26...Bb8!?+-) 27.Bg7+- Bb8 28.g4 f5 29.gf5 (29.Nf2 fg4 30.Ng4 Bg6+-) 29...ef5 30.Ng3 Bg6 31.Bd7 (31.Kf2!?+-) 31...Kd7+- 32.h4 (32.Nf1 Bf7 33.Nd2 Bd6+-) 32...h5 (32...Bf7!?=) 33.Kf2 Bf7 34.Nf5 The passed pawn on f4 will become decisive later 34...Bc4 35.Ng3 Bb5 (35...Bd6 36.Nh5 Bb5 37.e4+-) 36.Nh5 Ke6 (36...Ke7 37.Kf3+-) 37.Ng3 (37.e4 Bd3 38.Ke3 c4+-) 37...Kf7 (37...Bd3 38.Kf3+=) 38.Bb2 Bc6 (38...Bd3 39.Kf3+-) 39.h5 Kg8 (39...b5 40.h6 Bd6 41.h7+-) 40.h6 (40.Nf5 Be4 41.Ng3 Bc6+-) 40...Kh7 (40...b5 41.Nf5 Be4 42.Ng3=) 41.Bg7 (41.Nf5 Bd7 42.Ne7 Kh6=) 41...Bc7 (41...b5 42.Nf5+-) 42.f5 (42.Ke2 b5+-) 42...Bg3 43.Kg3 c4 44.Kf2 (44.Kf4 b5+-) 44...c3 (44...b5!?+=) 45.Bc3+- Kh6 46.f6 Kg6 47.Kg3 Kf7 (47...b5 48.Kf4+-) 48.Kf4 b5 49.Ke5 Bd7 (49...Bf3 50.e4+-) 50.Kd6 (50.e4 Bg4+-) 50...Be6 (50...Bf5 51.Bd4+-) 51.e4 (51.Kc5 Bc4+-) 51...Bc4 (51...b4 52.Bb4 Kf6 53.Bc3 Kf7 54.Bd4+-) 52.e5+- Be6 53.Bb4 Bc4 54.Kc5 (54.Bc5 Be6+-) 54...Ke6 55.Bc3 Be2 56.Bd4 (56.Bb2 Bd3+-) ½–½. Ruhle,Ernst Albrecht – Poell,Guenter, Wch Seniors Bad Wildbad, 1993.

6.c4 dc4 7.Bc4 b6?? 8.Qf3+- Nd5 (8...Na6 9.ba6 Rc8 10.Nc3+-) 9.Bd5 ed5 10.Qd5 Qg5 (10...Bc6 11.Qd8 Kd8 12.bc6 Nc6+-) 11.Qg5 f6 12.Qd5 Be6 13.Qe6 Be7 14.Qc8 Bd8 15.Qe6 (better 15.Qb7!? Nd7 16.Qa8 0-0+-) 15...Be7 16.Nc3 Nd7 17.Nd5 0-0-0 (17...Kf8 18.Qe7 Kg8 19.Qd7 h5 20.Qe6 Kh7 21.Qf7 Kh6 22.Ne7 Kg5 23.Qg7 Kh4 24.Bf6) 18.Qc6 Kb8 19.Nc7 Kc8 (19...a5 20.ba6 c4 21.Qb7) 20.Na6 1–0. DEFFM – GuestTXTV, freechess.org, 2018.

6.c4 dc4 7.Nf3 =.

6.c4 Bd6 7.Nf3 0-0 8.d4 cd4 9.Bd4 dc4 10.Bc4 Re8 11.0-0 e5 12.Bb2 Qc7 13.Nfd2 e4 (13...Bg4 14.Qb3=) 14.g3 (better 14.Bf6 gf6 15.Qh5+-) 14...Be5 15.Nc3 Bg4 16.Qb3 Bf3 (better 16...Rd8 17.f4 ef3 18.Nf3 Bg3 19.Bf7 Qf7 20.Qf7 Kf7 21.hg3 Nbd7=) 17.Be2?? (better 17.Nf3 ef3 18.Rfd1+-) 17...Bc3-+ 18.Nf3 Bb2 19.Qb2 ef3 20.Bf3 Nbd7 21.Rac1 Nc5 22.Qd4 Rac8 23.Bb7 Qb7 24.Rc5 Rc5 25.Qc5 Qb6 26.Qc2 Qe6 0–1. Zellmer,Gustav – Soberski,Mario, Guben op, 2003.

6.c4 Bd6=+ 7.f4 0-0 8.Nf3 a6 9.Be2 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Qa5 (12...Ne4 13.Nc3 Nc3 14.dc3=) 13.Nc3 Bc8 14.0-0 Nbd7 15.Qc2 Nb6 16.Be2 Nbd7 17.Ng5 h6 (17...Rd8 18.Nge4 Ne4 19.Ne4+=) 18.Nge4+= Be7 19.Bb2 Qc7 20.Ra1 b6 21.Bf3 Nh7 (21...Ne4 22.Be4 Nf6 23.Bc6+=) 22.g4 Rd8 23.Ne2 (23.d3 Nhf6+=) 23...Ndf6 24.N2g3 (24.Be5 Qd7 25.N2c3 Bb7 26.Nf6 Nf6+=) 24...Nd5 (24...Qd7 25.Qc4=) 25.Kh1 f5 (25...Qd7 26.Nh5 g6=+) 26.gf5 ef5 27.Nc3 (27.Be5 Qd7 28.Nd6 Bd6 29.Bd5 Kh8=) 27...Nb4= 28.Qd1 Nd3 29.Kg1 Be6 30.Ba3 Bf8 31.Qe2 Qe7 32.Bc6 Qd6 (32...g6 33.Qf3=+) 33.Nh5 (33.Nd5 Bd5 34.Qd3 g6=+) 33...Bf7 34.Nf6?? (better 34.Ng3=+) 34...Nf6-+ (34...gf6?! 35.Qg2 Kh8 36.Qg3-+) 35.Na4 (35.Qf3 Be7-+) 35...Qc7 (better 35...Nf4!? 36.Qf1 Ne6 37.Nb6-+) 36.Nb2 Qd6 (36...Bh5 37.Qg2-+) 37.Nd3?? (37.Na4 Nf4 38.Qf1-+) 37...Qd3-+ 38.Qd3 Rd3 39.Bc1 Rb3 (39...Ne4 40.Ra6 c4 41.Be4 fe4 42.Rb6-+) 40.Ra3 (40.h4 Bc4 41.Kg2 Bb5 42.Bb5 Rb5-+) 40...Rb1 41.Rc3 Nd5 42.Rc2 Nb4 43.Rc3 Na2 44.Ra3 Rc1 45.Kf2 Nb4 46.Ra8 Kh7 (better 46...Nd3 47.Kf3-+) 47.Rb8 (47.Rf8 Kg6 48.e4-+) 47...Nd3 48.Kg2 Rc2 (better 48...Be7 49.Rb6 Bf6-+) 49.Rb6 (49.Rf8 Rd2 50.Kf3-+) 49...Rd2 50.Kg3 c4 (50...Re2 51.Ra6-+) 51.Bd7 Re2 (51...g6 52.Be6 Kg8 53.h3-+) 52.Bf5 g6 53.Bg4 (53.Bd3 cd3 54.Rb7 Re3 55.Kf2-+) 53...Re3 54.Kh4 Nf4 55.Bd1 g5 (55...g5 56.Kg4 Bh5 57.Kf5 Bd1 58.Rb7 Bg7 59.Re7 Re7 60.b6 Re5) 0–1. Sundin,Tommy – Forsgren,KO, Skelleftea Sweden, 1988.

6.c4 Be7 7.Nf3 0-0 8.Be2 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 Qb6 12.0-0 dc4 13.Bc4 Bc8 (13...Rd8 14.Rd1+=) 14.d4 (14.Na4 Qa5+=) 14...cd4 15.Nd4 Nbd7 16.Bd3 Nc5 17.Be2 (17.Na4 Na4 18.Qa4 Rd8+=) 17...Nce4 (17...e5!? 18.Nf3 e4=) 18.Ne4+= Ne4 19.Bf3 (19.Nb3 f6+=) 19...f5 (19...Nc5 20.Bg4=) 20.Qa2 (20.Be4 fe4 21.Qb1 e5 22.Qe4 Bf6 23.Qd5 Kh8+=) 20...Bf6 (20...Nd2 21.Rc1=) 21.Be2 (21.Nf5 Qb5 22.Bf6 Nf6+-) 21...Rd8 (21...f4 22.Bd3 Nd2 23.Re1+=) 22.f3 (22.Nf5!? Kh8 23.Bf6 Nf6 24.Ng3+-) 22...Bd4 (22...Ng5=) 23.Bd4 (better 23.ed4!? Rd4 24.Kh1 Nf2 25.Rf2=+) 23...Rd4=+ 24.fe4 (24.ed4 Qd4 25.Kh1 Nf2 26.Rf2 Qf2=+) 24...Re4-/+ 25.Bf3 (25.Rf5 Qe3 26.Rf2 Rf4-/+) 25...Qe3 (25...Re3 26.Qf2-+) 26.Kh1 Re5 27.Qa8 (better 27.Qa5 Rc5 28.Qd8 Kf7 29.Bh5 g6 30.Bd1-/+) 27...Qc5?? (better 27...Rc5-+) 28.Bb7+- Kf7 (28...Kf7 29.Bc8 Qb5+-). GuestFDJX – GuestLLPN, freechess.org, 2017.

6.c4 Be7 7.Nf3 0-0 8.Be2 Be8 9.0-0+= Nbd7 10.Qc2 b6 11.Nc3 Kh8 12.cd5 ed5 13.Qf5 g6 (better 13...Nb8!?+-) 14.Qg5+- Ng8 (14...Kg8 15.Nd5 Nd5 16.Qd5 Nf6+-) 15.Nd5 f6 16.Qh4 Ne5 1–0. DEFFM – GuestTWDR, freechess.org, 2018.

6.c4 Be7 7.Nf3 0-0 8.Be2 Be8 9.0-0 Nbd7 10.d4 Qc7 11.Nbd2 Rc8 12.Rc1 Qd8 13.cd5 ed5 14.dc5 Nc5 15.Nd4 Nce4 (better 15...Bd7!?=) 16.Ne4+/- de4 17.Nf5 Bb4? (better 17...Bd7!? 18.Ne7 Qe7+/-) 18.Qb3 Be7?? (better 18...Rc1 19.Rc1 Qd2+-) 19.Rc8 1-0. BeepBeepImAJeep (2560) - sasan_al18 (2355), Rated Bullet game, lichess.org, 2015.

6.Be5 a6 =.

6.Be5 c4=+.

6.Nf3 a6 7.c4 dc4 8.Bc4 ab5 9.ab5 Ra1 10.Ba1 Qa5 11.Nc3 Bd6 12.0-0 0-0 (12...Bc8 13.Ng5 Nbd7 14.Nce4+-) 13.Qb3 (13.Qc2 Be7+-) 13...Qc7 14.h3 (14.Qc2 Bc8+-) 14...Bc8 15.d4 (15.b6 Qc6+-) 15...Nbd7 16.d5 (16.Na4 b6+=) 16...ed5 (16...e5 17.b6 Qb6 18.Qc2+=) 17.Nd5 Nd5 18.Bd5 Ne5 (18...Nf6 19.Bf6 gf6 20.Nd2+=) 19.Qc3 (better 19.Ng5 h6 20.Ne4+-) 19...Re8?? (19...Be6 20.b6 Qe7 21.Bb7 Qb7 22.Ne5 f6= (22...Qb6?? 23.Nd7 Be5 24.Qe5+-)) 20.Qc2 (20.Ng5 Be6 21.Be6 (21.Ne6?! fe6 22.Ba2 Ng6+-) 21...fe6 22.Ne4+-) 20...Be6 (better 20...Nf3 21.Bf3 Rd8=) 21.Be6 (better 21.Bb7!? Qb7 22.Be5 Be5 23.Ne5 Qb5 24.Rb1=) 21...Nf3-/+ (21...fe6 22.Be5 Be5 23.b6+-; worse 21...Re6 22.Ng5 Rg6 23.f4+-) 22.gf3 Re6 (22...fe6?! 23.f4=) 23.Qf5 (23.Rd1 Rg6 24.Kf1 Qd7-/+) 23...h6 (23...Qd7 24.Kh1-+) 24.Kh1 (better 24.Rb1-/+) 24...Be5 (24...Qd7!?-/+) 25.Be5=+ Re5 26.Qf4 (26.b6 Qe7 (26...Rf5?? 27.bc7 Rf3 28.c8Q Kh7 29.Rd1+-) 27.Qc8 Kh7=) 26...Qe7 27.Rg1 (27.Kh2 Qe6=+) 27...Qe6-/+ 28.Rg3 (28.Kh2-/+) 28...Rh5?? (better 28...c4!?-+) 29.Kg2 (29.Qb8 Kh7 30.Qb7=+) 29...Rf5 (better 29...b6!?=+) 30.Qb8+= Kh7 31.Qb7 h5? (31...c4 32.Qb8+=) 32.Qe4?? (better 32.e4 Rf4 33.Qc7+-) 32...Qf6?? (32...c4 33.Qb1 g6 34.b6=) 33.f4 (better 33.b6 g6 34.b7+-) 33...g6+- 34.Kh2 (34.Qc4!?+-) 34...c4 (34...Qb2 35.Rg1=) 35.Qc4+= Qb6?? (better 35...Qb2 36.Kg2 Qb5 37.Qb5 Rb5+=) 36.Rg5+- Rf6 37.Re5 (37.Rc5 Qe6 38.Qd4 Qa2+-) 37...Kg7 (37...Qb7 38.Rd5+-) 38.Rd5 (38.Rc5!? Qa5 39.Qd4 Qb6+-) 38...Qa5 (38...Kh7 39.Qb4+-) 39.Qd4 Qe1 (39...Qb6 40.Kg3+-) 40.Qd2 (better 40.Kg2 Qb1+-) 40...Qf1?? (40...Qd2 41.Rd2 Rb6+-) 41.Re5 (better 41.Qb2 Kh7 42.Rc5+- (42.Qf6?! Qf2 43.Kh1 Qf1 44.Kh2 Qf2 45.Kh1 Qf1 46.Kh2 Qf2=)) 41...Re6?? (better 41...Rd6! 42.Qd6 Qf2 43.Kh1 Qf1 44.Kh2 Qf2 45.Kh1 Qf1 46.Kh2 Qf2=) 42.Re6+- fe6 43.Kg3 (better 43.Qb2 Kf7 44.b6+-) 43...Qb5 44.Qd4 (44.Qc3 Kf7 45.Qc7 Ke8+-) 44...Kh7? (44...Kf7 45.Qa7 Ke8 46.Kh4+-) 45.Qe4 (45.Kh4 Qf5 46.Qe5+-) 45...Qf5?? (better 45...Qd7+-) 46.Qf5+- gf5 47.Kh4 Kg6 48.f3 Kh6 49.e4 Kg6 (49...fe4 50.fe4 Kg6 51.Kg3+-) 50.Kg3 (50.e5 Kh6 51.Kg3+-) 50...Kh6 (50...Kf6+-) 51.Kf2 Kg6 52.Ke3 Kf6 53.Kd4 h4 54.Ke3 (better 54.Kc5 e5 55.Kd5+-) 54...e5 (54...Ke7 55.Kf2 Kd6+-) 55.fe5 Ke5 56.f4 Kf6 (56...Kd6 57.ef5 Ke7+-) 57.e5 Ke6 (57...Kf7 58.Kd3 Ke7 59.Kc3 Kd7 60.Kb4 Kd8 61.Kb5 Kd7 62.Kb6 Ke8 63.Kc6 Kd8 64.Kd6 Kc8 65.Kd5 Kd7 66.Kd4 Kc6 67.Kc4 Kc7 68.Kc5 Kd8 69.e6 Ke8 70.Kd4 Kf8 71.Ke5 Ke8 72.Kf5 Ke7 73.Ke5 Ke8 74.Kf6 Kd8 75.e7 Kd7 76.Kf7 Kd6 77.f5 Ke5 78.e8Q Kd5 79.f6 Kd4 80.Ke6 Ke4 81.f7 Kf4 82.f8Q Ke3 83.Qb5 Kd2 84.Qf4 Kc3 85.Qe3 Kc2 86.Qbb3) 58.Kd4 Kd7 (58...Ke7 59.Kd5 Kd7 60.e6 Ke7 61.Ke5 Kf8 62.Kd6 Kg8 63.e7 Kf7 64.Kd7 Kg6 65.e8Q Kh7 66.Ke6 Kg7 67.Kf5 Kh7 68.Kf6 Kh6 69.Qg6) 59.Kd5 Ke7 60.e6 Ke8 61.Ke5 Ke7 (61...Kf8 62.Kf5 Kg7 63.Kg5 Kg8 64.Kf6 Kf8 65.f5 Ke8 66.e7 Kd7 67.Kf7 Kd6 68.e8Q Kc5 69.Ke6 Kb4 70.f6 Kc4 71.Qa4 Kc5 72.f7 Kb6 73.f8Q Kb7 74.Qc5 Kb8 75.Qaa7) 62.Kf5 Kd6 (62...Ke8 63.Kf6 Kd8 64.Kf7 Kc7 65.e7 Kc6 66.f5 Kd7 67.f6 Kd6 68.e8Q Kd5 69.Kg6 Kd4 70.f7 Kd3 71.f8Q Kc4 72.Qe4 Kb3 73.Qfb4 Ka2 74.Qa8) 63.Kf6 Kd5 (63...Kc6 64.f5 Kd6 65.Kf7 Ke5 66.f6 Kd6 67.e7 Kc6 68.e8Q Kd5 69.Kg6 Kc5 70.f7 Kd4 71.f8Q Kc4 72.Qe4 Kb5 73.Qd6 Ka5 74.Qeb4) 64.e7 Ke4 65.e8Q Kf4 (65...Kd4 66.f5 Kc3 67.Ke6 Kc4 68.f6 Kd4 69.f7 Kc5 70.f8Q Kc4 71.Qa3 Kd4 72.Qea4) 66.Qe1 Kf3 67.Qh4 (67.Kf5 Kg2 68.Kf4 Kh2 69.Kf3 Kh3 70.Qh1) 67...Kg2 (67...Ke3 68.Qg4 Kd3 69.h4 Kd2 70.h5 Kd3 71.h6 Ke3 72.h7 Kd3 73.h8Q Kc2 74.Qc4 Kb2 75.Qh6 Ka3 76.Qhc1) 68.Qg4 Kh2 (68...Kf1 69.Qe4 Kf2 70.h4 Kg3 71.h5 Kf2 72.h6 Kg3 73.h7 Kf2 74.h8Q Kg1 75.Qhh4 Kf1 76.Qhe1) 69.h4 Kh1 70.h5 Kh2 71.h6 Kh1 72.h7 Kh2 73.h8Q 1–0. Osmak,Iulija (2425) – Morris_Suzuki,Sophie (2040), Women's Speed Chess Q3, 2021.

6.Nf3 Be7 7.c4 (7.Be2 0-0=) 7...0-0 8.Nc3 a6 9.Bd3 ab5 10.ab5 Ra1 11.Qa1 Bd6 12.Ng5 (12.0-0 Qc7=) 12...h6 (better 12...Re8=+) 13.h4?? (better 13.Nf3=) 13...dc4 (13...hg5 14.hg5 dc4 15.Bc2-+) 14.Bc4 (better 14.Nge4 cd3 15.Nd6-/+) 14...Re8?? (better 14...hg5!? 15.hg5 Ne8-+) 15.Qb1 (15.Nce4 Ne4 16.Ne4 Bf8=) 15...Be5 (15...hg5!? 16.hg5 Ng4-/+) 16.f4 Bc7 17.Nce4 Ne4 18.Qe4? (18.Ne4!? Qe7 19.b6=) 18...hg5-/+ 19.hg5 g6?? (19...e5 20.g6 Be6-/+) 20.Rh8 1–0. Harders,Walter – Droste,Eckart, Schleswig Holstein–ch, 1991.

6.c4 b6 7.Nf3 Bb7 8.Be2 Nbd7 9.0-0 0-0 10.d4 Qc7 11.Nbd2 Rac8 12.Rc1 Rfd8 13.h3 Qb8 14.Qb3 Qa8 15.a5 dc4 16.Nc4 cd4 17.Bd4 Nc5 18.Qa2 Bd5 19.ab6 Bc4 20.Bc4 ab6 21.Ne5 Qa2 22.Ba2 Nfe4 23.Nc6 Re8 24.Rfd1 Ra8 25.Bc4 Ra4?? (better 25...Kf8+/-) 26.Ne7+- Re7 (26...Kf8 27.Nc6 Kg8 28.Be5+-) 27.Bc5 Nc5 (27...Re8 28.Bb6 g5+-) 28.Rd8 (28.Rd8 Re8 29.Re8) 1-0. BeepBeepImAJeep (2765) - StarThanatos (2150), Rated Bullet tournament KuxCkDH7, lichess.org, 2015.

6.c4 b6 7.Nf3 d4 8.Be2 (8.ed4 a6+=) 8...de3= 9.fe3 e5 (9...Bb7 10.0-0=) 10.0-0 (better 10.Ne5!? a6 11.Bf3+/-) 10...e4+= 11.Ne1 (better 11.d3+=) 11...Bf5?? (11...a6!?=) 12.Nc3 (better 12.Rf5 0-0 13.d3+-) 12...Qd7 13.Nc2 (13.d3 0-0+=) 13...Bg6 14.a5 0-0 (better 14...ba5!? 15.Ra5 0-0=) 15.ab6+/- ab6?? (better 15...a5+/-) 16.Ra8+- Qc7 17.Nd5 Nd5 18.cd5 Nd7 19.Re8 (better 19.Rf8 Bf8 20.Qa1+-) 19...Re8= 20.Bc4 (20.d4!?=) 20...Bd6-/+ 21.h3 f6 (21...Ne5 22.Be5 Be5 23.d3-/+) 22.Kh1 (better 22.d3=+) 22...Be5?? (better 22...Ne5 23.Be5 Re5=+) 23.d6+- Bf7 (23...Kf8 24.dc7 Bb2 25.Qg4+-) 24.dc7 (24.Bf7 Kf7 25.Qh5 Kf8 26.dc7 Bc7+-) 24...Bc7 (24...Bc4 25.Qg4 Bb5+-) 25.Bf7 Kf7 26.Na3 (26.Qh5 Kf8+-) 26...Ne5 (26...g6 27.Qa4 Bb8 28.Qa8+-) 27.Nc4! Nc4 28.Qb3 Re6 (28...Kg6 29.Qc4 h5 30.Qd5+-) 29.Qc4 Be5 30.Be5 Ke7 31.Bf4 g5 32.d4 (32.Bc7 g4 33.Ra1 f5 34.Ra7 h6 35.Be5 Kf8 36.Qe6 gh3 37.Bd6) 32...h5 33.d5 Re5 34.Be5 f5 Black prepares g4 (34...Kf8 35.Rf6 Ke8 36.d6 Kd7 37.Qe6 Kd8 38.Rf8) 35.Rf5 g4 (35...Ke8 36.d6 Kd7 37.Rf8 h4 38.Qf7) 36.Qe4 (36.d6 Kd7 37.Rf8 gh3 38.Qf7) 36...gh3 (36...Kd8 37.Rf8 Ke7 38.Ra8 gh3 39.Qh7) 37.Bf4 Kd8 38.Qe6 (38.Rf8 Kd7 39.Qe6) 38...hg2 39.Kg1 h4 40.Rf8 1-0. BeepBeepImAJeep (2515) - WNSMLZSM (1795), lichess.org, 2016.

6.c4 d4 7.Nf3 de3 8.fe3 0-0 9.Be2 a6 10.0-0 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Nc3 Nb6 14.d4 cd4 15.ed4 Bb4 16.h3 Qe7 17.Bd3 Rd8 18.Qb1 Bc3 (18...Nbd7!?+=) 19.Bc3+/- e5 (19...Rd7!?+/-) 20.Ne5 Be6 21.Qc2 Qc7 (21...Rc8 22.Re1+-) 22.Bb2 Nbd7? (better 22...Re8+-) 23.Nd7 Qd7 24.d5 Bh3 (24...Nd5 25.cd5 Bd5 26.Bh7 Kh8 27.Qc3+-) 25.gh3 (25.Bf6!? gf6 26.Bh7 Kf8 27.gh3 Qh3+-) 25...Qh3 26.Bf6 gf6 27.Qg2 Qg2 28.Kg2 Kg7 29.Kf3 h6 30.Rg1 (30.Rg1 Kf8 31.Ke4+-) 1-0. BeepBeepImAJeep (2605) - khtabkhmal (1750), lichess.org, 2016.

6.c4 Nbd7 7.Nf3 0-0 8.Be2 Nb6 9.cd5 Nbd5 10.0-0 b6 11.d4 Bb7 12.Qb3 Rc8 13.dc5 Rc5 14.Nd4 (14.Rd1 Nd7=) 14...Rc8 15.Nd2 h6 (15...Nd7 16.Rfc1=) 16.N2f3 (16.Rfd1 Nd7=) 16...Bd6 17.Rad1 (17.Rfc1 Qd7=) 17...Ne4 18.Bd3 (18.Rc1 Qd7=) 18...Ng5 (18...Nc5 19.Qc4=+) 19.Ng5 Qg5 20.Nf3 Qe7 21.Be4 Rfd8 22.Ne5 f5 (22...Qh4 23.f4=) 23.Bd5 Bd5 (23...ed5 24.f4=) 24.Rd5+= ed5 25.Qd5 (better 25.Nc6!? Qf7 26.Nd8 Rd8 27.g3+=) 25...Kh7-/+ 26.Nc6 (better 26.Qf3!? Qf6 27.Nc4=+) 26...Bh2-+ 27.Kh2?? (27.Kh1 Rc6 28.Qf5 (28.Qc6?? Qh4 29.Bf6 gf6 30.Qf6 Qf6 31.Kh2 Qh4 32.Kg1 Qa4-+) 28...g6 29.Qf3-/+) 27...Qh4 (27...Rd5?? 28.Ne7 Rc2 29.Nd5 Rb2 30.Ne7+-) 28.Kg1 Rd5 0–1. KLINGON09 (1805) – stano62 (1780), lichess.org, 2020.

6.c4 Nbd7 7.Nf3 Qc7 8.Be2 a6 9.0-0 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 Nb6 13.Be2 0-0 Black intends c4 14.Nc3 (14.Qc2 Nbd7=) 14...c4 15.d4 cd3 (15...Bd7 16.Ne5=) 16.Bd3 Rd8 17.Qc2 Nfd5 (better 17...e5!?=) 18.Nd5 Nd5 19.Bh7 Kh8 20.Qc7 (better 20.Rc1!?+/-) 20...Nc7+= 21.b6 Nd5 22.Be4 Nb6 23.Ne5 Kg8 24.Rb1 Nd5 25.h3 Bf6 26.Nc4 Ba1 27.Ra1 b5 28.Ne5 (better 28.Bd5 ed5 29.Ne5=) 28...Bd7?? (28...Bb7 29.Ra7 Ne3 30.Bd3= (worse 30.fe3 Be4 31.Nf7 Rd1 32.Kh2 Rd2-/+)) 29.Rb1?? (29.Nd7 Nc3 30.Bd3 b4+-) 29...Rb8?? (better 29...Nc3 30.Rb4 Be8=) 30.Nd7+- Rb7 31.Nc5 Rc7 (31...Rb8 32.Bd5 ed5 33.Nd3+-) 32.Na6 (32.Rb5 Ne7+-) 32...Ra7 33.Bd5 Ra6 34.Bf3 Rb6 35.Rb4 Kf8 36.Be2 Ke7 37.Rb5 Rb5 38.Bb5 Kf6 39.Be2 Kg6 40.g3 f5 41.Kg2 Kf6 42.h4 g5 (42...e5 43.g4 Ke6 44.g5+-) 43.hg5 Kg5 44.f4 Kf6 45.Kh3 e5 46.Kh4 e4 (46...ef4 47.ef4 Kg7 48.Kg5+-) 47.Kh5 Kf7 48.Kg5 Ke6 49.Kg6 Ke7 50.Kf5 Kd6 51.Ke4 Kc5 52.Kf3 Kb4 53.e4 (53.e4 Kc5 54.f5+-) 1-0. BeepBeepImAJeep (2655) - akshraj (2010), lichess.org, 2017.

6.d4 c4 7.c3 b6 8.Nd2 Bb7 9.Ba3 Nbd7 10.Be7 Qe7 11.Qc1 Bc8 12.Qa3 Qa3 13.Ra3 e5 14.Ngf3 e4 15.Ne5 Ne5 16.de5 Nd7 17.Be2 Ke7 18.Ra1 Re8 19.0-0 Ne5 20.f4 Nd3 21.Bd3 cd3 22.Rfd1 Be6 23.Rac1 f5 24.c4 dc4 25.Nc4 Bc4 26.Rc4 Rac8 27.Rd4 Rc4 28.Rc4 Rd8 29.Rc7 Rd7 30.Rd7 Kd7 31.Kf2 Kd6 32.g4 Kd5 33.gf5 a6 34.f6 gf6 35.ba6 Kc6 36.a7 Kb7 37.a8Q Ka8 38.Rd3 Kb7 39.Rd4 f5 40.h4 Kc6 41.h5 h6 42.Kg3 Kc5 43.Kf2 b5 44.ab5 Kb5 45.Rd5 Kc4 46.Rf5 Kd3 47.Re5 1-0. TimC (2405) - rondep (2525), Rated Bullet game, lichess.org.

6.Nf3 Nbd7 7.Be2 0-0 8.0-0 b6 9.c4 Bb7 10.d4 dc4 11.Nbd2 c3 12.Bc3 cd4 13.Bd4 Rc8 14.Ne5 Ne5 15.Be5 Qd5 16.Nf3 Qe4 17.Bd4 Rfd8 18.Bd3 Qg4 19.h3 Qh5 20.Ne5 Qh6 (20...Qg5 21.Nf3 Bf3 22.Qf3=+) 21.Rc1= Nd5 (21...Bc5 22.Qe2=+) 22.Nc6 Bc6 23.Rc6 Nb4 24.Rc8 Rc8 25.Bb1 Rd8 26.Qg4 Bf6?? (better 26...Nd5=) 27.Bf6+- (27.Bf6 Qf6 28.Qb4+-) 1-0. Bostonbliz (2610) - almasssss (2390), Casual Bullet game, lichess.org, 2022.

6.f4 0-0 7.Nf3 Re8 8.Nc3 (8.Be2 Nbd7=) 8...d4=+ 9.ed4 cd4 10.Ne2 d3 11.cd3 Nd5 12.g3 Bf6 (12...Nd7 13.Bg2=+) 13.Be5 Nd7 14.d4 (14.Bg2!?=) 14...Be7-/+ 15.f5 ef5 16.Bg2 f6 17.Bf4 Nf4 18.Nf4 Bd6 19.Ne2 f4 20.0-0 fg3 21.Ng3 Nf8 22.Rc1 Be6 23.Qc2 Bd5 (23...Ng6 24.Ne4-/+) 24.Nh4 (24.Nf5 Ba3 25.Rce1 Ne6=) 24...Bg2 (24...Bg3 25.hg3 Ne6 26.Bd5 Qd5 27.Qc4-/+) 25.Kg2=+ Rc8 (25...Ne6 26.Qc4=+) 26.Qb3 Kh8 27.Nhf5 (27.Rc8!? Qc8 28.Nhf5 Bg3 29.Qf7 (worse 29.Ng3 Qd7=+) 29...Re2 30.Kg3+=) 27...Rc1=+ 28.Rc1 Bg3 (28...Ne6 29.Ne2-/+) 29.Qg3 (29.Qf7 Ne6 30.Kg3 Qb8 31.Kg2 Nf4 32.Kf1 Nh5 33.Qh5 g6+/-) 29...Ng6 (better 29...Qd5 30.Qf3 Qd7=+) 30.Qc7?? (better 30.Kg1 Qd5 31.Rf1=) 30...Qd5-+ 31.Kg3 (31.Kg1 Qf5 32.Qb7-+) 31…Qf5 (31...Qf5 32.Qb8 Qg5 33.Kh3 Rb8 34.Rf1 h5 35.Rf6 Qg4) 0-1. cabbage9 (2835) - zsolti_83 (2660), Rated Bullet game, lichess.org, 2020.

5.e3 0-0 6.Nf3 a6 7.c4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.Be2 Nb6 11.cd5 Nbd5 12.0-0 c6 (12...Be7 13.Bf6 Nf6 14.d4=) 13.d4 Bd6 14.Nbd2 cb5 (14...Ng4 15.e4 Nf4 16.bc6 bc6 17.Bc4+=) 15.Bb5 (better 15.e4!?+/-) 15...Qa5 16.Bd3 b5 17.Bb2?? (17.Nb3 Qa8 18.e4 Nf4+/-) 17...b4 (better 17...Bb7!?=) 18.Nc4+/- Qc7 (18...Qa2!? 19.Qc2 b3+-) 19.Nd6+- Qd6 20.e4 Nc3? (better 20...Nf4 21.e5 Qe7 22.ef6 Qf6+-) 21.Bc3 bc3 22.e5 Qb4 (22...Qc7 23.ef6 gf6 24.Qc1+-) 23.ef6 gf6 24.Bc2 (24.Qa1 Rd8+-) 24...Bb7 25.Qd3 f5 26.Rb1 Qb1 (26...Qe7+-) 27.Bb1 Be4 28.Qc3 (28.Qd1 Bd5+-) 28...Bb1 29.h3 (29.Ne5 Ba2+-) 29...Be4 30.Ne5 Rb8 (30...Bd5+-) 31.Qg3 Kf8 32.Nd7 (32.Nd7 Ke7 33.Nb8+-) 1-0. BeepBeepImAJeep (2710) - imonahorse (2445), lichess.org, 2016.

5.e3 0-0 6.Nf3 c6 7.c4 Nbd7 8.Be2 Qe7 9.0-0 h6 (9...dc4!? 10.bc6 bc6 11.Bc4 Rb8=) 10.d4+= Bd6 11.Nc3 dc4 12.Bc4 c5 13.Be2 (13.a5 Rd8+=) 13...b6 (13...e5 14.Rc1=) 14.h3 Bb7 15.Rc1 Rac8 16.Nd2 (16.Qc2 cd4 17.Nd4 Rfd8=) 16...Rfd8 (16...cd4 17.ed4 Bf4 18.g3=+) 17.Bf3 Bf3 18.Nf3 cd4 19.Nd4 Bb8 (19...Ne5 20.Qe2=) 20.Qe2 Qf8 (20...Nc5 21.Rfd1+=) 21.Nc6+/- Re8 22.Qf3 (better 22.Rfd1!?+/-) 22...Ne5= 23.Ne5 Be5 24.Rfd1 (24.Rc2 Re7=) 24...Bc3 (24...Qb4 25.Nd5 ed5 26.Rc8 Bb2 27.Re8 Ne8 28.Rd5 Qa4 29.Rd7=+) 25.Bc3 (25.Rc3 Rc3 26.Bc3 e5=) 25...Nd5 (25...Qa3!? 26.e4 e5=+) 26.Bd4 Rc1 27.Rc1 Rc8 (27...Qb4 28.Qg4 g6 29.Ba1+=) 28.Rd1 Qa3 29.Qg4 g6 30.Qh4 Kh7 31.e4 Qa4 32.Rd2 Qb4 33.ed5 Qd2? (33...e5 34.Qf6 ed4 35.Qf7 Kh8 36.Qf6 Kh7+-) 34.Qf6 Rg8 (34...Qd4 35.Qd4 ed5 36.Qd5 Kg7+-) 35.Qf7 (35.Qf7 Rg7 36.Qg7) 1-0. BeepBeepImAJeep (2685) - krygerus (2330), lichess.org, 2019.

5.e3 0-0 6.Nf3 c6 7.Be2 Bd7 8.c4 Qc7 (8...dc4 9.Bc4 a6 10.Nc3=) 9.0-0 dc4 10.Bc4 cb5 11.ab5 a6 (11...Be3!? 12.fe3 Qc4=) 12.Bf6+= gf6 13.Be2 ab5?? (better 13...Rc8+=) 14.Ra8+- Na6 15.Rf8 Kf8 16.Nc3 b4 17.Ne4 f5 (17...Be7 18.Qa1 Kg7 19.Rc1+-) 18.Nc5 Qc5 19.Qa1 b3 20.Rc1 Qb4 21.Rb1 (21.Qf6 Qa3 22.Rd1 Ke8+-) 21...Nc5 (21...Bc6 22.Qh8 Ke7 23.Qh7+-) 22.d4 (22.Ng5!? Ke7 23.Nh7 b2 24.Rb2 Qa4+-) 22...Ne4 23.Bd1 Ba4 24.Qb2 Nc3 25.Rc1 Nd1 26.Rd1 Ke7 (26...Bc6 27.Nd2+-) 27.h3 (27.d5 Qd6+-) 27...b5 (27...Bc6 28.Ne5+-) 28.Ne5 Qd6 29.Rc1 b4 30.Ra1 Bb5 (30...f6 31.Nd3 Bb5 32.Ra7 Kd8 33.Nc5+-) 31.Qb3 Bd7 (31...Ba6 32.Qc2 b3 33.Qb3 Kf8+-) 32.Nd7 (better 32.Ra7 Ke8+-) 32...Kd7 33.Rb1 (33.Ra7 Ke8 34.Qd1 Qd8 35.Qa4 Kf8+-) 33...f6 34.Qb4 f4 (34...Qb4 35.Rb4 Kc7+-) 35.Qb7 Qc7 36.Qc7 (36.Qa6 fe3 37.fe3 Qc8 38.Rb7 Qb7 39.Qb7 Ke8 40.Qh7 Kf8+-) 36...Kc7 37.Kf1 (37.ef4 Kc6+-) 37...f5 (37...fe3 38.fe3 h5 39.Rb5+-) 38.ef4 h6 (38...h5 39.Re1 Kd6 40.Kg1+-) 39.Ke2 h5 40.Kd3 1-0. BeepBeepImAJeep (2660) - AgainstModernChess (1835), lichess.org, 2017.

5.e3 0-0 6.Nf3 Nbd7 7.Be2 c6 8.0-0 Nb6 (8...Bd6 9.d4=) 9.d3 Bd7 10.c4 cb5 11.ab5 Nc8 (11...dc4 12.dc4 Qe7 13.Ne5=) 12.Ne5 (12.d4 Bd6+=) 12...b6 (12...dc4 13.dc4 Qc7 14.Bd4+=) 13.Nd2 Ne7 14.Ndf3 Nf5 (14...dc4 15.dc4 Qc7 16.Ra4+-) 15.Nd7 Qd7 (15...Nd7 16.cd5 ed5 17.Qb3+-) 16.Bf6+- gf6 17.d4 (17.cd5 Be3 18.g4 Bd4 19.de6 fe6+-) 17...Bd6 (17...Be7 18.cd5 Qd5 19.Qb1+-) 18.Qb3 (18.cd5 ed5 19.Bd3 Kg7+-) 18...Bc7 (18...dc4 19.Bc4 Rac8 20.e4+-) 19.Nd2 (19.cd5 ed5 20.Ra6 Rfc8+-) 19...Qd6 (19...dc4 20.Nc4 Nd6 21.Nd2+-) 20.g3+- Nh6 (better 20...Ne7+-) 21.Bf3 f5 (21...Rfd8 22.cd5 ed5 23.Rfc1+-) 22.cd5 e5 (22...ed5 23.Qd5 Qd5 24.Bd5+-) 23.de5 Qe5 24.d6! Bd6 (24...Bd6 25.Ba8 Discovered attack; 24...Qd6 25.Ba8 Discovered attack) 25.Ba8 Ra8 26.Nf3 Qg7 (26...Qe4 27.Qd1 Bf8 28.Ra4+-) 27.Qd5 Rd8 28.Qc6 (28.Ra7 Qf8 29.Rd1 Bc7+-) 28...Bc5 (28...f6 29.Qc4 Kh8 30.Qe6+-) 29.Ra7 Rf8 30.Qd5 Qg6 (30...Ng4 31.Qf5 Be3 32.fe3 Ne3 33.Qf4 Nf1 34.Kf1+-) 31.Ne5 Qh5 (31...Qe6 32.Qe6 fe6 33.Rd1+-) 32.Rd1 (better 32.Nd7!? Ng4 33.Qg2 Re8+-) 32...Ng4 33.Ng4 Qg4 34.Kg2 Qh5 (34...Qe4 35.Qe4 fe4 36.Rd5+-) 35.Qf3 Qg6 36.Rd5 Qe6 (36...f4 37.Qf4 h6 38.Rf5+-) 37.Rf5 f6 (37...Be7+-) 38.Qg4 Kh8 39.Qf4 (39.Qg7) 1–0. KLINGON09 (1770) – berug (1715), lichess.org, 2020.

5.e3 e5 6.c4 dc4 7.Be5 0-0 (7...Be6 8.Qc2=) 8.Nc3 (8.Bc4 Nbd7 9.Nf3 Ne5 10.Ne5 Bd6+=) 8...Re8 (8...Ng4 9.Bf4 Be6 10.Nh3=) 9.Nf3 Bg4 10.Bg3 (10.Bf6 Qf6 11.Bc4 Nd7+=) 10...Ne4 (10...Be6!?=) 11.Bc4+= Nc3 12.dc3 Qd1 (12...Qf6 13.0-0 c6+/- (13...Qc3?? 14.Bf7 Kf7 15.Qd5 Kg6 16.Qg5 Kf7 17.Qg4+-)) 13.Rd1+- Bf3 14.gf3 Bd6 (better 14...c6+-) 15.Bd6 cd6 16.Rd6 a6 17.b6 Nc6 18.f4 Na5 19.Bd5 (19.Ba2!? Rad8 20.Rd8 Rd8+-) 19...Rad8 20.Rd8 Rd8 21.e4 Kf8 (21...Rd6 22.Ke2+/-) 22.Ke2 (22.c4 Rc8 23.Ke2 Ke7+-) 22...f5 23.f3 Ke7 (23...Rd6 24.Rb1 Rh6 25.Kd3+-) 24.Rg1 Kf6?? (24...g6 25.Ke3+-) 25.h4 (better 25.e5 Ke7 26.Rg7 Kf8 27.Rf7 Ke8 28.Be6+-) 25...g6 26.h5! Nc6 (26...gh5 27.Rg5 Double attack (27.Rg5 Decoy; 27.e5 Passed pawn)) 27.Bc6 bc6 28.a5 fe4 29.fe4 Re8 30.Ke3 c5 (30...gh5 31.Rg5+-) 31.Rg5 Rc8 32.hg6 hg6 33.Rd5 c4 34.Rd7 (34.Rd6 Kg7+-) 34...Ke6 (34...g5 35.f5 Rb8 36.Ra7+-) 35.Rg7 Kf6 36.Rc7 Ke6 (36...Rg8+-) 37.Rc8 (37.Rc8 Kf6 38.b7 g5 39.b8Q gf4 40.Qf4 Ke6 41.Qf8 Kd7 42.Qe8 Kd6 43.Rc6) 1-0. BeepBeepImAJeep (2615) - PushuAkola (1725), lichess.org, 2018.

5.Nf3 c6 6.e3= cb5 (6...a6 7.Be2=) 7.Bb5 Bd7 8.0-0 0-0 9.c4 (9.Ne5 Bb5 10.ab5 a6=) 9...a6 (9...Bb5 10.cb5 Nbd7 11.d3=) 10.Bd7 Nbd7 (< 10...Qd7 11.Bf6 gf6 12.cd5 Qd5 13.Nc3+=) 11.cd5 (11.d4 Be7 12.cd5 Nd5=) 11...Nd5 12.d4 Be7 (12...Bd6 13.Ba3 N7f6 14.Qb3=) 13.Qb3 Bf6 (13...N7f6!?=) 14.Ba3+= (< 14.Qb7 Rb8 15.Qa6 Rb2-+) 14...Be7 (14...Re8 15.Qb7 Qc8 16.Qb2+=) 15.Qb7+/– Ba3 (15...Qc8 16.Qc8 Rfc8 17.e4 Ba3 18.Na3=) 16.Na3 Nc7 (16...N7b6 17.a5 Na4 18.e4+/–) 17.Rfc1 Ne8 (17...Nd5 18.Rab1+/–) 18.Rab1 (18.Nc4 Ndf6+-) 18...Nd6 19.Qc6 Nf6 20.Ne5 Rc8 (20...Nde4+-) 21.Qa6 Ra8 22.Qc6 Rc8 23.Qf3 Rc1 24.Rc1 Nde4 (24...Qa5 25.Qc6 Qd2 26.Qc2 Qc2 27.Nc2+-) 25.Nac4 Qc8 26.a5 Nd2 27.Qc6 Nfe4 28.Nd2 (28...Qc6 29.Rc6 (29.Nc6 Nd2 30.Ne7 Kh8+-) 29...Nd2 30.Rc7+-) 1–0. Wall,Bill – SlowCam, internet, 2003.

5.Nf3 Nbd7 6.e3 =.

5.e3 b6 6.c4 c6 7.Nf3= h6 (7...0-0 8.Nc3=) 8.Be2 (8.Bd3 0-0=) 8...Bb7 (8...0-0 9.0-0=) 9.cd5 (9.Nc3 0-0=) 9...cd5 10.Nc3 Nbd7 11.Ba3 (11.0-0 0-0=) 11...Qe7 (11...Nc5 12.d4 Nce4 13.Ne4 Ne4 14.Bd6 Qd6 15.0-0=) 12.Bd6= Qd6 13.d4 (13.0-0 0-0=) 13...0-0 (13...Qb4 14.Qd2=) 14.0-0 Rac8 (14...Rfc8 15.Qb3=) 15.Qb3 Rc7 16.a5 (16.Rfc1 Rfc8=) 16...Rfc8=+ 17.Nd1 Ne4 18.Bd3 (18.Qa3=+) 18...Nc3 (18...e5 19.ab6 ab6 20.de5 Ne5 21.Ne5 Qe5 22.Qb2=+) 19.Nb2 (19.ab6 ab6 20.Nc3 Rc3=) 19...Nf6 (19...f6 20.ab6 ab6 21.Na4=) 20.Ne5 (20.Qa3 Nfe4=+) 20...Nce4 (20...Nfe4!? 21.Qa3 f6=+) 21.Qa3= Qa3 22.Ra3 Rc3 (22...Nc3 23.Na4 Na4 24.Ra4=) 23.Ra2+= Nd2 (23...R3c7 24.ab6 ab6 25.Na4=) 24.Rd1 Nb3 (24...Rc1!?+=) 25.ab6+- ab6 26.h3 (26.Ra7 R8c7 27.g3 Nc1+-) 26...Rc1 (26...Nc1 27.Ra7 Nd3 28.Ned3=) 27.Kh2 (27.Rc1 Rc1 28.Kh2 Na5+-) 27...Ne4 (27...Rd1 28.Nd1 Nc1 29.Ra7=) 28.Be4 (better 28.Ra7 Nd6 29.Nd7+=) 28...de4? (better 28...Rd1 29.Nd1 de4+=) 29.Rc1+- Rc1 (better 29...Nc1 30.Ra7 Rc2+-) 30.Ra7 (better 30.Na4+-) 30...Bc8?? (better 30...Bd5+=) 31.Na4 (31.Nec4 Kh7 32.Rf7 Rc2+-) 31...f6 (31...Ra1 32.Ra8 Nd2 33.Kg3+- (33.Rc8?! Kh7 34.Kg3 Ra4+-)) 32.Nc6 Kh7 (32...e5 33.Kg3 ed4 34.ed4 Kf8+-) 33.Rc7 (33.Rc7 Nd2 34.h4 (34.Rc8?! Nf1 35.Kg1 Nd2 36.Kh2 Nf1 37.Kg1 Nd2 38.Kh2=) 34...Nf1 35.Kh3+-) 1–0. Jabloun,Bilel (1985) – Kanzari,Slim, Coupe de Ramadan, 2018.

5.e3 Bd7 6.c4 a6=+ 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 0-0 10.Be2 c6 11.0-0 cb5 (11...dc4!? 12.d3 cd3 13.Qd3 Nd5=+) 12.cb5= Qb6 (12...Ne4 13.Bd4=) 13.Nc3 (13.Bf6 gf6 14.Nc3 Qa5+=) 13...Ne4 14.Qb3 Nc3 15.Bc3 Rc8 16.h3 Be7 17.Ra1 Bf6 (17...Qd8!?+=) 18.Bf6+/- gf6 19.Qb2 Rc5? (better 19...e5+/-) 20.Qf6+- Bb5 (20...Qc7 21.d4 Rc1 22.Rc1 Qc1 23.Kh2 Qc7 24.Ne5+-) 21.Rb1 Qc6 (21...Nc6 22.Qb2 Na7 23.Nd4+-) 22.Qd8 (better 22.Ne5 Rc1 23.Kh2 Qc7 24.Rc1 Nc6 25.Bb5 Qe5 26.Qe5 Ne5+-) 22...Kg7? (better 22...Qe8 23.Qd6 Be2 24.Qc5 Bf3 25.gf3 Nd7+-) 23.Bb5 (23.Qb8?! Rc1 24.Rc1 Qc1 25.Kh2 Be2 26.Qg3 Kf8+/-) 23...Rb5 24.Rb5 Qb5 25.Qb8 Qb1 26.Kh2 Qf5 (26...Qb6 27.Qg3 Kf8 28.Qf4+-) 27.Qb7 e5 (27...h6 28.Qb2 Kg8 29.Qb8 Kg7 30.Qg3 Kf6 31.d4+-) 28.Qc7 (better 28.Qd5 f6 29.d4 Kf8+-) 28...e4 29.Qe5 (29.Nd4 Qf6+-) 29...Qe5 (29...Qf6 30.Qg3 Kf8 31.Ng5+-) 30.Ne5 Kf6 31.Nc6 Ke6 32.Nd4 (better 32.Kg3!? Kf6+-) 32...Ke5 33.g4 f6 34.Kg3 Kd6 35.f3 (35.Kf4 Ke7+-) 35...Kc5 (35...ef3 36.Nf5 Kd7 37.Kf3+-) 36.f4 (36.fe4 de4 37.Nb3 Kc4+-) 36...Kc4 37.Kf2 (better 37.f5 h6 38.Ne2+-) 37...Kd3 (37...Kc5 38.g5 fg5 39.Ne6 Kd6 40.Ng5+-) 38.Ke1 (better 38.f5 h6 39.h4 Kd2+-) 38...h6 (38...Kc4+-) 39.Kd1 (39.h4 Kc4 40.g5 hg5 41.hg5 fg5 42.fg5 Kc5 43.g6 Kc4 44.g7 Kb4 45.g8Q Kc5 46.Qe6 Kb4 47.Qb6 Ka4 48.Qb5 Ka3 49.Qb3) 39...f5 (39...Kc4 40.h4 Kc5+-) 40.gf5 h5 (40...Kc4 41.f6 Kb4 42.f7 Ka4 43.f8Q h5 44.Qe8 Ka3 45.Qb5 Ka2 46.Qb3 Ka1 47.Nc2) 41.f6 h4 (41...Kc4 42.f7 Kb4 43.f8Q Ka5 44.Qc5 Ka6 45.Qb5 Ka7 46.Nc6 Ka8 47.Qa6) 42.f7 Kc4 43.Kc2 (43.Kc2 Kb4 44.f8Q Ka5 45.Qb8 Ka6 46.f5 Ka5 47.Qb5; 43.f8Q Kd3 44.Qa3 Kc4 45.Qc3) 1-0. BeepBeepImAJeep (2655) - DeiGratiaRex (1915), lichess.org, 2016.

5.e3 Nbd7 6.Nf3 0-0 7.c4 Re8 8.Be2 c5 9.cd5 ed5 10.0-0 b6 11.d4 c4 12.Nc3 Nf8 13.Ne5 Bb7 (worse 13...Be5 14.de5 Re5 15.Bc4+=) 14.Bf3 Qc7 15.Ne2 Rad8 16.Nf4 Ng6 (16...N8d7!?=+) 17.Nfg6= hg6 18.Bc3 Ne4 19.Be4 de4 20.Qe2 Bd5 21.Rfc1 g5 22.h3 f6 23.Ng4 Qd7 24.Be1 (24.Qb2 Rc8=) 24...Kf7 25.Rc4 (25.Qb2 Qe7=) 25...Bc4 26.Qc4 Qe6 27.Rc1 (27.Qc2!?-/+) 27...Rc8-+ 28.Qe6 Ke6 29.Rb1 Kd5 30.f3 (30.Bb4 Bb8-/+) 30...ef3 31.gf3 f5 32.Ne5 Be5 33.de5 Re5 34.Bf2 Rc2 35.Rd1 Ke6 36.Rd8 (36.Rd4 Ra2 37.e4 fe4 38.fe4 Rc5-+) 36...Rd5 37.Re8 (37.Rd5 Kd5 38.Be1-+) 37...Kf7 38.Ra8 Rd1 39.Kg2 Rdd2 40.Ra7 Kg6 41.Rb7 (41.Kg1 Rf2 42.Rc7-+) 41...Rf2 42.Kg1 Rg2 (42...Rfd2 43.Rb6 Kh5 44.Rh6 gh6 45.a5 Rd1) 43.Kh1 Rgd2 44.Kg1 (44.Rb6 Kh5 45.Rh6 gh6 46.a5 Rd1) 44…Rd1 0-1. BeepBeepImAJeep (2745) - Sviridov_Valery (2740), lichess.org, 2019.

5.e3 e5 6.c4 c6 7.Nf3 e4 8.Nd4 0-0 9.cd5 c5 10.Nb3 Nd5 11.Be2 (11.d4 ed3 12.Bd3 c4 13.Bc4 Ne3 14.fe3 Qh4 15.g3 Qc4=) 11...Qh4 (11...Qg5 12.g3-/+) 12.h3 (12.g3 Qe7=+) 12...Bf5 13.Nc3 Nb4 14.Ba3 (14.Na5 Qe7=+) 14...b6 (14...a5 15.Rc1-/+) 15.Bb4 cb4 16.Nd5 (16.Nd4!? Bg6 17.Na2=+) 16...Be6-+ 17.Nf4 Bf4 18.ef4 Qf4 19.Nd4 Bd5 20.0-0 Nd7 (20...a5 21.d3-/+) 21.Rc1 (21.Rb1!?-/+) 21...Nc5-+ 22.Bc4 Bb7 23.Nc6 (23.d3-+) 23...Qf6 (better 23...Bc6 24.bc6 Rad8-+) 24.Nb4-/+ Nd3 (better 24...Rfd8-/+) 25.Nd3+= ed3 26.Bd3 Rad8 27.Be2 (27.Qc2!? Kh8 28.Rfe1+= (worse 28.Bh7 g6=+)) 27...Qg5= 28.Bf3 Rd2 29.Bb7 (29.Qb3!? Bf3 30.Qf3=) 29...Rd1=+ 30.Rfd1 h5 31.Bc6 h4 (31...Qh4 32.g3 Qb4 33.Rb1 Qa4 34.Ra1=+) 32.Re1 (32.Rc4 Rd8 33.Bd7 Qe7=+) 32...Rd8-/+ 33.Re4?? (33.Rc4 Qd2 34.Re3 g5-/+) 33...g6 (better 33...Qc1 34.Kh2 g5-+) 34.Rce1 Kg7 (34...Rd2 35.Rc4-/+) 35.Rg4 (35.Re7!?=+) 35...Qd2-/+ 36.Rge4 (36.Re3 Qd1 37.Kh2 Qd6 38.Kg1 Qf6-/+) 36...Rd4 37.R1e2 (37.R4e2 Qa5-+) 37...Qc1 (37...Qd1 38.Kh2-+) 38.Re1 Qc3 39.R4e3 (39.Kh2 Qb4-+) 39...Qc5 (39...Qc2 40.Re7 Rd1 41.Bf3 Re1 42.Re1 Qa4 43.Be2-+) 40.a5 (better 40.Be8-+) 40...Rf4?? (better 40...ba5 41.Re5 Qb6-+) 41.ab6 (41.a6 Rd4-/+) 41...ab6 42.R3e2 Qf5 (42...Rd4 43.Kf1-/+) 43.Rf1 Qf6 44.Rd2 Rb4 45.Rd3 (45.Rfd1 Rb2-/+) 45...Rf4 46.Rf3 1-0. BeepBeepImAJeep (2705) - mooty (2390), lichess.org, 2016.

5.e3 Qe7 6.c4 0-0 7.Nf3 dc4 8.Be2 c6 (8...e5 9.Bc4 e4 10.Nd4=+) 9.Bc4 cb5 10.ab5 Nbd7 11.d4 Nb6 (11...e5 12.de5 Ne5 13.Be5 Be5 14.Ne5 Qe5 15.Qd4=+) 12.Bd3 Nbd5 13.Nbd2 Nb4 14.0-0?? (better 14.Be2=) 14...Nd3-+ 15.Bc3 Nb4 (15...Qc7 16.Ba5 b6 17.Bb6 Qb6 18.Nc4 Nf2 19.Rf2-+) 16.Nc4 Nbd5 17.Bb2 Bd7 (better 17...Bb4 18.b6-+) 18.Re1?? (18.Nd6 Qd6 19.Ba3 Qb6 20.Bf8 Rf8-+) 18...Bb5 (better 18...Bb4-+) 19.Nd6 Qd6 20.Ba3? (20.e4 Ne4! 21.Re4 Rfc8-+) 20...Qb6 (better 20...Nb4!? 21.e4 Qe7 22.Rb1-+) 21.Bf8 Rf8 22.Ne5 Ne4 (22...Nc3 23.Qc2 Rc8 24.Qb2-+) 23.Qc2 Nd6 24.Rab1 (24.Rec1-+) 24...Qc6?? (better 24...Rc8 25.Qb3 Nc3-+) 25.Nc6+- Bc6 26.e4 Nf4 27.g3 Ng6 (27...Nh3 28.Kg2 Ng5 29.f3+-) 28.f3 (28.d5 ed5 29.ed5 Bd5+-) 28...h6 (28...Nb5 29.Qc5 a6 30.Rbd1+-) 29.Rec1 (better 29.d5!? Be8 30.Qc7 Nb5 31.Qb7 Ne5+-) 29...Nc8 30.Rb2 Nb6 31.Qb1 Ne7 32.Rb6 (better 32.Qa1!? Nec8+-) 32...ab6 33.Qb6 Ng6 34.Qc5 1-0. BeepBeepImAJeep (2620) – yoyoparker, lichess.org, 2017.

5.e3 Qe7 6.Ne2 c6 7.f4 Nbd7 8.d4 (8.bc6 bc6 9.Nd4 Bb7=+) 8...Ne4 9.Nd2 f5 (9...Ndf6!?-/+) 10.Ne4= fe4 11.g3 (11.c4 0-0=) 11...0-0 12.Bg2 (12.c4 Bb4 13.Bc3 cb5 14.ab5 dc4=) 12...c5 (12...cb5 13.ab5 Nb6 14.Bc1-/+) 13.0-0 c4 14.c3 h5 (14...a6 15.ba6 Ra6 16.Qc1-/+) 15.Qc1=+ h4 16.Ba3 Nf6 17.Bd6 Qd6 18.Qa3 (18.gh4 Bd7=) 18...Qc7 (better 18...Qa3!? 19.Ra3 Ng4-/+) 19.gh4= Ng4 20.Qc1 Qe7 21.h3 Nh6 22.Qe1 Nf5 23.Ng3 Nh4 24.Kh2 Bd7 25.Rg1 Kh8 (25...a6 26.b6-/+) 26.Bh1 Be8 27.Ra2 a6 28.b6 Rc8 (28...a5!?=+) 29.a5= Rf6? (29...Bg6 30.Qd1=) 30.Ne2?? (better 30.Ne4 Rh6 31.Nc5+/-) 30...Rh6=+ 31.Rg4 Nf5 32.Ng3 Bg6 33.Nf5 Bf5 34.Rg3 Kg8 The backward pawn on h3 becomes a target 35.Bg2 Kf7 36.Bf1 Rch8 37.Qc1 (37.Qd1 Ke8-/+) 37...Qh4 (better 37...Qd7-/+) 38.Rag2?? (better 38.Rb2=+) 38...Qe7 (better 38...Bh3 39.Rg7 Ke8-+) 39.Rg7+- Kf8 40.Re7 Ke7 (40...Rh3 41.Kg1 Rh1 42.Kf2 Ke7 43.Qa3 Kf6 44.Qd6+-) 41.Kg1 (better 41.Qa3!? Kf7 42.Rg3 Rh4+-) 41...Kf6 42.Qe1 (better 42.Qa3 Bh3 43.Rh2 Kf7+-) 42...Rg6 (42...Rh3 43.Qb1 Re3+-) 43.Rg6 Kg6 44.Qg3 Kf7 45.Qg5 (better 45.Kf2 Rg8 46.Qh4+-) 45...Rg8 46.Kf2 Rg5 47.fg5 Kg6 (47...e5 48.de5 Ke6 49.h4 Ke5 50.h5+-) 48.h4 Kh5 (48...Kf7+-) 49.Be2 (better 49.Kg3 e5 50.de5+-) 49...Kh4 50.g6?? (better 50.Bd1 Kg5 51.Ba4+-) 50...Bg6-/+ 51.Kg2 Kg5 (51...Bh5 52.Bf1-/+) 52.Kf2 (52.Kg3 Be8=+) 52...Bf5 53.Bd1 Kf6?? (better 53...e5-/+) 54.Ba4+- e5 55.Bc6!! Bc8 (55...bc6 56.de5 Passed pawn) 56.Ba4?? (better 56.Bd5 ed4 57.ed4+-) 56...Ke6 57.Ke2 (57.de5 Ke5 58.Kg3 Kf5=+) 57...ed4 58.ed4 Kd6 59.Ke3 Bd7 60.Bc2 Bg4 61.Bd1?? (better 61.Ba4-/+) 61...Bd1-+ 62.Kd2 Ba4 (62...Kd7 63.Ke3 Kc6 64.Kd2-+) 63.Ke3 Kc6 64.Kf4 Plans Kb5 64...Kb5 65.Ke3 Ka5 66.Kf4 Bc6 67.Ke3 If White now would get Kb5 in, he might survive 67...Kb6 68.Kf4 White threatens to counter with a5 68...Ka5 (68...a5 69.Ke3 a4 70.Kf4 a3 71.Kg4 a2 72.Kh4 a1Q 73.Kg5 Qg1 74.Kf6 e3 75.Ke6 Qg7 76.Kf5 e2 77.Kf4 e1Q 78.Kf5 Qe4) 69.Ke3 Ka4 70.Kf4 Kb3 71.Ke3 Kc3 (71...Kc3 72.Kf2 Kd3 73.Kg3 e3 74.Kg2 e2 75.Kh2 e1Q 76.Kh3 Bd7 77.Kh2 Qe2 78.Kg3 b5 79.Kf4 Qe3) 0-1. BeepBeepImAJeep (2570) - DwightHoward (2660), lichess.org, 2015.

5.Nf3 Nbd7 6.e3 c6 7.Be2 a6 8.0-0 0-0 9.c4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Nc3 (12.bc6 bc6 13.Bc4 Nb6=) 12...e5 13.Qb1 Nc5 (13...Qe7 14.bc6 bc6 15.e4=+) 14.bc6 bc6 15.Ng5 (better 15.Bc4!? e4 16.Nd4=) 15...h6-/+ 16.Nge4 Bf5 17.f3 Nb3 (17...Nfe4 18.fe4 Be6 19.Qc2-/+) 18.Qc2=+ Bb4 Attacks the backward pawn on d2 19.Bc4 Ne4 The pressure on the backward pawn d2 grows (19...Na1!? 20.Ra1 Be4 21.fe4 Bc3 22.Qc3 Ne4=+) 20.Qb3= Nd2 21.Qb4 Nf1 22.Bf1 Qd2 23.e4 Qe3 24.Kh1 Ra8 25.Qb1 (25.ef5?? Ra1 26.Nb1 Qc1-+) 25...Be6 26.h3 Kh7 27.Bb2 1–0. DEFFM – dkejwjej, freechess.org, 2018.

6.c4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 c6 10.Be2 dc4 11.Bc4 cb5 12.Bb5 Bd7 13.Nc3 Bb5 14.Nb5 Be7 15.0-0 Qb6 16.Qa4 Nc6 17.Rb1 h6 18.d4 Ne4 19.h3 Nd6 20.Nc3 Qc7 (20...Qa5 21.Qa5 Na5 22.e4+=) 21.Rc1 (21.d5!? Na5 22.de6 fe6 23.Nd4+/-) 21...Qa5= 22.Qa5 Na5 23.Rb1 Rc8 24.Bb2 (24.e4!?=) 24...Nac4 25.Ba1 b5 26.Ne5 (26.Rb3 Ra8 27.Bb2 Na5-/+ (27...Nb2?! 28.Rb2 Rc8 29.Ne2=+)) 26...Bf6 (26...Nd2 27.Rd1 Nb3 28.Bb2-/+) 27.Nd7 (27.Nb5? Nb5 28.Rb5 Be5 29.de5 Na3-+) 27...Be7 (27...Ra8 28.Nf6 gf6 29.d5-/+) 28.Nc5 (better 28.Nb5!? Nd2 29.Nd6 Bd6 30.Rd1+=) 28...Nd2 29.Rd1 N6c4 30.Nb5 Bc5 31.dc5 Rc5 32.Nd4 Ra5 33.Bc3 Ra3?? (better 33...Ra2=) 34.Bd2+/- (34.Rd2?! Rc3 35.Ne2 Ra3=) 34...Rd3 35.Nf3 e5 36.Kf1 (36.e4!? f5 37.Rc1 Nd2 38.Ne5 Rd4 39.ef5 Re4+-) 36...e4+/- 37.Ke2 Nb2? (better 37...ef3 38.Kd3 Nb2 39.Ke4 Nd1 40.Kf3 f6+-) 38.Ne1 Nd1 (38...Rd8 39.Rc1+-) 39.Nd3 (39.Kd1?! Rd6+/-) 39...ed3 (39...Ne3 40.Be3 ed3 41.Kd3+-) 40.Kd1 Kf8 41.Bc3 Ke7 (41...f6 42.e4+-) 42.Kd2 (better 42.Bg7!? h5+-) 42...g6 43.Kd3 h5 44.g4 Ke6 (44...hg4 45.hg4 f5 46.gf5 gf5 47.Ke2+-) 45.f4 (45.gh5!? gh5 46.Ke4 h4+-) 45...hg4 46.hg4 Kd5 47.g5 Ke6 48.e4 Kd6 49.Bf6 Ke6 50.Kd4 Kd6 51.f5 gf5 52.ef5 Kd7 53.Ke5 Ke8 54.g6 Kf8 55.g7 Kg8 56.Kd6 Kh7 57.Ke7 Kg8 58.Ke8 Kh7 59.Kf8 Kh6 60.g8Q (60.g8Q Kh5 61.Qg5) 1-0. BeepBeepImAJeep (2535) - gkbe (2395), lichess.org, 2018.

6.c4 dc4 7.Bc4 a6 8.Nf3 ab5 9.ab5 Ra1 10.Ba1 c6 11.Be2 cb5 12.Bb5 Bd7 13.Nc3 Bb5 14.Nb5 Be7 15.0-0 Nc6 16.d4 (16.Bf6 Bf6 17.d4 Qd7=) 16...Nd5 17.Qb3 f5 18.Nc3 Nc3? (18...Qb6 19.Qc2=) 19.Bc3 (19.Qe6!? Kh8 20.Bc3 Qc7+-) 19...Qd5 (19...Qd7 20.Rb1 Rb8 21.Qb5+=) 20.Qb7 Rb8 21.Qc7?? (21.Qa6 Bd6+/-) 21...Rb3 (better 21...Bd6 22.Qb8 Nb8-+) 22.Qc8 Kf7 (22...Bf8 23.Rc1+/-) 23.Ba1 Qc4?? (better 23...Nd8+/-) 24.Qc6!!+- Qc6 25.Ne5 (25.Ne5 Ke8 26.Nc6+-) 1-0. BeepBeepImAJeep (2745) - erva20 (2585), lichess.org, 2020.

6.c4 dc4 7.Nf3 a6 8.Bc4 ab5 9.ab5 Ra1 10.Ba1 c6 11.0-0 cb5 12.Bb5 Qb6 13.Nc3 Nc6 14.Be2 Na5 (14...e5 15.Nb5 Qd8 16.Nd6 Qd6 17.Qb3=) 15.Qb1 Qb1 16.Rb1 Bd7 17.Nb5 Bb5 (17...Be7 18.Bc3 Nc6 19.Nc7+=) 18.Rb5+/- Ra8 19.g3 (19.Bc3!? Bc7 20.Ba5 Ra5 21.Rb7+/-) 19...Nd5+= 20.Kg2 h5 (20...Nc6 21.Bb2 Ra7 22.e4=) 21.h4 (21.e4 Nc7 22.Rh5 Nc6+/-) 21...Nc7 22.Rb1 g6 (22...Nd5 23.e4 Nb4 24.Nd4+/-) 23.Ne5 (better 23.Bc3+/-) 23...f6? (23...b5+=) 24.Nc4?? (better 24.Ng6 Kg7 25.Bh5+-) 24...Kf7?? (better 24...Nc4 25.Bc4 b5=) 25.Nd6+- Ke7 26.Ne4 g5 (26...Nd5+-) 27.Bf6 Kf7 (27...Kd7 28.Bg5 Nd5 29.Bh5+-) 28.Bg5 (28.Bh5 Kg8 29.Ng5 Nd5+-) 28...Nd5 (28...Kg6 29.d4+-) 29.Nd6 (29.Bh5 Kf8+-) 29...Kg6 30.Nb7 Nb7 (30...Nc6 31.Nc5 Nd8 32.d4+-) 31.Bd3 Kf7 32.Rb7 Ke8 33.Bg6 Kf8 34.Bh6 (34.Bf7!? Ne7 35.Re7 e5+-) 34...Kg8 35.Bf7 Kh7 36.Be6 (better 36.Bg5 Rf8 37.Be6 Kh8+-) 36...Kh6 37.Bd5 (37.Bd5 Re8 38.d4+-) 1-0. BeepBeepImAJeep (2645) - EricTse (1825), lichess.org, 2017.

6.c4 dc4 7.Nf3 c3 8.Nc3 Nbd7 9.Be2 Nc5 10.0-0 e5 11.d4 ed4 12.Nd4 (worse 12.Qd4 Nb3 13.Qh4 Na1 14.Ba1 Ng4 15.Qd8 Rd8-/+) 12...Nce4 13.Ne4 Ne4 14.Bf3 Nf6 (14...Qh4 15.g3 Qe7 16.Qd3=) 15.a5 Rb8 (15...a6!?+=) 16.a6+/- ba6? (better 16...c5 17.ab7 Bb7+/-) 17.Nc6+- Qe7 (17...Bh2 18.Kh2 Qd1 19.Rfd1 Rb5 20.Ne7 Kh8 21.Bf6 gf6 22.Nc8 Rc8 23.Ra6 c5 24.Ra7 c4 25.Rf7 c3+-) 18.Ne7 (18.Ne7 Be7 19.Qc2 Rb5 20.Qc7 Rb2 21.Qe7+-) 1-0. BeepBeepImAJeep (2715) - Arsenov_A (2455), lichess.org, 2020.

6.c4 dc4 7.Nf3 e5 8.Be5= Be5 9.Ne5 Qd5 (9...Re8 10.Nc4 a6 11.ba6 Ra6 12.Be2+=) 10.Nc4+= a6 11.Nc3 Qg5 12.h4 Qg6 13.Ne5 Qf5 14.Nf3 (14.d4 Qe6+/-) 14...ab5+= 15.ab5 Ra1 16.Qa1 Nbd7 17.Be2 Ne5 18.Ne5 Qe5 19.0-0 Rd8 (19...Bg4 20.d4 Qh5 21.Bg4 Ng4 22.g3+/-) 20.d4+/- Qe6 21.g3 (21.Qa7 Ne8+/-) 21...Ng4 22.Bf3 c6 (22...Qf5 23.Be4 Qe6 24.Qa8+/-) 23.bc6 bc6 24.Ne4 Nf6 25.Nc5 Qe7 (25...Qe8 26.Qa4+-) 26.Bg2 (26.Bc6 Bd7 27.Qa7 Kf8 28.Nd7 Nd7+-) 26...Nd5 27.Rc1 h6 28.Nd3 Bf5 29.Ne5 c5? (better 29...Bd7+-) 30.Nc6 (30.dc5?! Nb4+-; 30.Rc5?! Nb4+-) 30...Qd6 (30...Qe8 31.Nd8 Qd8 32.e4 Be4 33.Be4+-) 31.Bd5 Qd5 (31...Re8 32.Rc5 Be6+-) 32.Ne7 (32.Ne7 Kh7 33.Nd5 Rd5 34.dc5+-) 1-0. BeepBeepImAJeep (2710) - shadrack (2500), lichess.org, 2020.

6.c4 c5 7.Nf3 dc4 8.Bc4= Nbd7 9.0-0 Nb6 10.Be2 a5 (10...Qe7 11.a5 Nbd5 12.Nc3=) 11.d4+= c4 (better 11...Bd7!?+=) 12.Nbd2+/- Nfd5 13.Nc4 Nc4 14.Bc4 Nb6 15.Bd3 Qe7 16.h3 Bd7 17.Ne5 Be5 (17...Rac8 18.Qf3 Be8 19.Qe4+/-) 18.de5+- Rfd8 19.Qf3 Be8 (19...Bc6 20.Bh7! Kh7 21.bc6 bc6 22.Qc6+-) 20.Rfd1 Nd5 21.Be4 (better 21.Qe4 g6 22.Bd4+-) 21...Nb4? (better 21...Qb4 22.Bd5 Rd5 23.Rd5 ed5+-) 22.Bb7 Rab8 23.Be4 g6 (23...Rd1 24.Rd1 Nd5 25.Rd4+-) 24.Bd4 Rdc8 (24...Nd5 25.Rd2+-) 25.Qf6 Qf6 26.ef6 Nc2 27.Bc2 Rc2 28.Rac1 Rbc8 (28...Rc1 29.Rc1 Bd7 30.Rc7+-) 29.Rc2 Rc2 30.Rb1 (30.Be5 Rc8+-) 30...Rc8 (30...Rc7 31.Bb6 Rc4 32.Ba5 Ra4 33.b6+-) 31.Be5 h5 32.b6 Bc6 33.b7 Bb7 34.Rb7 Rc4 (34...h4 35.Bc7+-) 35.Rb8 Kh7 36.Rf8 Ra4 (36...Kh6+-) 37.Rf7 Kh6 38.Re7 g5 39.f7 Ra1 (39...Kg6 40.f8Q Ra1 41.Ba1 e5 42.Qf7 Kh6 43.Qe6) 40.Ba1 (40.Ba1 e5 41.f8Q Kg6 42.Qf7 Kh6 43.Qe6) 1-0. BeepBeepImAJeep (2650) - holy_spirit (2385), lichess.org, 2016.

6.c4 Nbd7 7.Nf3 b6 8.Be2 Bb7 9.0-0 dc4 10.Bc4 (10.Na3 Ng4 11.h3 Nge5=) 10...Qe7 (better 10...Ng4!? 11.g3 Bf3 12.Qf3 Nh2 13.Kh2 Qh4 14.Kg2 Qc4-/+) 11.d4 Rac8 12.Be2 c5 13.Nbd2 cd4 14.Nd4 Nc5 15.Bf3 Nd5 16.Nc4 Rfd8 17.Nd6 Rd6 18.Ba3 (18.a5 Qg5=) 18...Rdd8 19.Rc1 e5 20.Nc6? (better 20.Bc5 Rc5 21.Nf5=+) 20...Bc6-+ 21.bc6 Ne3! 22.Qe2 (22.fe3 Rd3 Double attack (22...Rd1 Discovered attack; 22...Rd3 Decoy)) 22...Nf1 23.Bc5 bc5 24.Rf1 e4! 25.Be4 (25.Qe4 Qe4 Combination; 25.Be4 Rd4 Double attack (25...Rd4 Decoy)) 25...Re8 26.f3 Rc6! 27.Qc4 (27.Bc6 Qe6 Double attack (27...Qe2 Pinning; 27...Qe2 Deflection; 27...Qe6 Decoy)) 27...Rc7 28.Rd1 g6 29.g4 (29.g3 Rd8 30.Rc1 Rd4-+) 29...Rd8 30.Rd2 (30.Rd3-+) 30...Rd2 31.Qc3 Qd6 (31...Rcd7 32.Qa1 Qh4 33.Qh8 Kh8 34.Bd3 Qh2 35.Kf1 Qf2) 32.f4 Qd4 (32...Qd4 33.Qd4 cd4 34.Bg2 Rc1 35.Bf1 d3 36.h4 Re2 37.a5 d2 38.h5 Rf1 39.Kf1 d1Q) 0-1. BeepBeepImAJeep (2490) - josechess1994 (2310), lichess.org, 2019.

6.c4 Nbd7 7.Nf3 dc4 8.Bc4 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 Nb6 12.Be2 e5 13.0-0 Bg4 14.d4 (14.d3 Qa8=) 14...e4=+ 15.Nd2 Be2 16.Ne2 Re8 17.Ng3? (17.Nc3!?=+) 17...Bg3 (17...Qd7 18.f4-+) 18.fg3 (18.hg3!? Ng4 19.Qc1-/+) 18...Qd7-+ 19.Qa5 (19.d5 Nbd5 (19...Nfd5?! 20.Bg7 Qb5 21.Bh6=+) 20.Bf6 Nf6-+ (20...gf6?! 21.Qd4=+)) 19...Qg4 (better 19...Nfd5!? 20.Nb3 Ne3-+) 20.Re1 Nfd5 21.Qa2 h5 (21...Nb4!? 22.Qb3 N6d5-/+) 22.Qb3 h4 23.gh4 Qh4 24.g3 Qh3 25.Nf1 Re6 26.Qc2 (26.Ba3 Qf5 27.Nd2 Rh6=+) 26...Qg4 27.Qg2 (27.Nd2 Qg5=+) 27...Rf6 (27...c6-/+) 28.Qe2?? (28.Nd2 Qf5=) 28...Rf3?? (28...Qe2 29.Re2 Nc4 30.h3-+) 29.Qg2?? (better 29.Nd2+=) 29...Nc4-+ 30.Bc1 Qg5 (30...Nb4 31.h3 Qg5 32.b6 Nb6 33.Bd2-+) 31.Nd2? (better 31.Qa2!? Ndb6 32.Qa7=+) 31...Re3-+ 32.Nf1 Re1 33.Bg5 Nce3 34.Be3? (better 34.Qf2 Rf1 35.Qf1 Nf1 36.Kf1-+) 34...Ne3 35.Qf2 Rf1 36.Qf1 Nf1 37.b6 (37.Kf1 f5 38.Ke2-+) 37...cb6 38.Kf1 f5 39.Ke2 Kf7 40.Ke3 Ke6 (better 40...b5 41.g4 b4 42.gf5-+) 41.g4 g6 (better 41...f4 42.Ke4 g5 43.d5 Kd6-+) 42.h4 (42.gf5 Kf5 43.h3-+) 42...fg4 43.Ke4 b5 44.d5 Kd6 45.Kd4 (45.Kf4 b4 46.Kg4 b3-+) 45...g3 46.Ke3 b4 47.h5 gh5 48.Kf3 b3 49.Kg3 b2 50.Kh4 b1Q 51.Kg5 (51.Kg3 Qf5 52.Kg2 h4 53.Kh2 Qf3 54.Kg1 h3 55.Kh2 Qg2) 51...Qe4 (51...Ke5 52.Kh6 Qg1 53.Kh5 Kf5 54.d6 Qg5) 52.Kh6 (52.Kf6 Qf3 53.Kg6 Ke7 54.d6 Ke6 55.d7 Qf7 56.Kg5 Qf5 57.Kh6 Kf7 58.d8N Kf6 59.Nb7 Qg6) 52...Qd5 (52...Ke7 53.Kg7 Qg2 54.Kh7 Kf6 55.d6 Qg7) 53.Kg7 b5 (53...Ke6 54.Kg6 Qg2 55.Kh5 Kf5 56.Kh4 Qg4) 54.Kf6 b4 55.Kg7 b3 56.Kf8 (56.Kf6 Qf3 57.Kg7 b2 58.Kg6 b1Q 59.Kg7 Qc3 60.Kh6 Qf6 61.Kh5 Qbf5) 56...b2 57.Ke8 (57.Kg7 Qd4 58.Kh6 b1Q 59.Kh5 Qf5 60.Kh6 Qdf6) 57...b1Q (57...Qg8) 58.Kf8 Qbe4 (58...Qb2 59.Ke8 Qb8) 59.Kg7 Qdf5 (59...Qe7 60.Kg6 Qdg5) 60.Kh8 (60.Kg8 Qg6 61.Kf8 Qf3) 60...h4 (60...Qf8) 61.Kg7 Qeg4 62.Kh6 Qfh5 (62...Qgg6) 0-1. BeepBeepImAJeep (2530) - nemanjamilanovic (2110), lichess.org, 2017.

6.c4 Nbd7 7.Nf3 dc4 8.Bc4 a6 9.Be2 ab5 10.ab5 Ra1 11.Ba1 e5 12.0-0 Qe7 13.d4 ed4 (13...e4 14.Nfd2=+) 14.Nd4 Nc5 15.Nd2 Bd7 16.Nc4 Nce4 17.Nd6 Nd6 The isolani on b5 becomes a target 18.Qb3 Ra8 19.Rc1 Be8 20.Bb2 Nfe4 21.Ba3 Qg5 (21...Qh4 22.f3 Qf2 23.Kh1+/-) 22.Bd6 (22.Rc7 b6+/-) 22...Nd6 (22...cd6 23.Qc2 Qc5 24.Qb2+=) 23.Qb2 (23.Rc7 Ra1 24.Bf1 Qg6+/-) 23...Qe7 (23...Rc8 24.Bd3+=) 24.Qc3 Rc8 25.h3 c5 26.bc6 bc6 (26...Bc6 27.Bf3 Bd7 28.Qb2+=) 27.Nb3 (27.Qc5 Qf6+/-) 27...Ne4 28.Qc4 Bd7 29.Bf3 (29.Bd3 Nf6 30.Nc5+=) 29...Re8 (better 29...Ng5!? 30.Bg4 Be6 31.Be6 Ne6= (worse 31...fe6 32.Nd4 c5 33.f4+/-)) 30.Be4+/- Qe4 31.Qe4 Re4 32.Nc5 Be8?? (better 32...Re7+/-) 33.Ne4+- 1-0. BeepBeepImAJeep (2725) - Arsenov_A (2450), lichess.org, 2020.

6.c4 Nbd7 7.Nf3 Re8 8.Be2 dc4 9.Bc4 (9.Na3 c3 10.dc3 Qe7=) 9...e5 10.d4 ed4 11.Nd4 (11.Bd4 a6=) 11...Ne5=+ 12.Be2 Neg4 13.h3 Nf2 (13...Bb4 14.Kf1 Ne5 15.Nf3=+) 14.Kf2= Ne4 15.Kg1 Qg5 16.Nc2 Bf5 (16...Ng3 17.Bf3=) 17.Bd3 (17.h4 Qg6 18.Bh5+/-) 17...Qg3 (17...Bg3!? 18.Qf3 Bf2 19.Kh2 Bg3 20.Kg1 Bf2 21.Kh2 Bg3 22.Kg1=) 18.Qe1 (18.Qf3!? Bg6 19.Nc3 Qf3 20.gf3 Nc3 21.Bg6 Ne2 22.Kf2+/-) 18...Qg6+= 19.Nc3?? (19.Qf1 Bg3 20.Be4 Be4-/+) 19...Rad8?? (better 19...Bg3 20.Qc1 Nc3-+) 20.Ne4+/- Be4 21.Be4 Re4 22.Rd1 (22.Bd4 a6+/-) 22...Rde8 (22...Ra4 23.Qe2+=) 23.Rd2 (better 23.Bd4!?+/-) 23...Ra4+= 24.Bd4 Ra2 25.Qf2 (25.Qe2 Qe4+=) 25...Qe4 26.Ne1 (26.Qf3 a6+=) 26...Ra5 27.Qf3 (27.Qe2 Re6=) 27...Qb1 (27...Rb5 28.Qe4 Re4 29.Ba7=+) 28.Kf2 Qb5 (28...Rb5 29.g4= (29.Ba7?? Rf5-+)) 29.Qg4 (29.Rb2!? Qg5 30.h4=+ (30.Rb7? Rf5-+)) 29...f5?? (better 29...Qf5 30.Qf5 Rf5 31.Nf3 a5=+) 30.Qg7 1-0. BeepBeepImAJeep (2570) - milacek (2680), lichess.org, 2017.

6.c4 e5 7.cd5 Nd5 8.Nf3 e4 9.Nd4 Qg5 10.g3 (10.Nc3 Nc3 11.Bc3 Nd7=+) 10...Bg4-/+ 11.Be2 (11.Qc2 Re8 12.Nc3 Nb4=+) 11...Bh3 (11...Nb4!? 12.0-0 Be2 13.Qe2 c5 14.bc6 N8c6 (worse 14...bc6 15.f3=) 15.Nc6 bc6=+) 12.Nc3=+ Nc3 13.Bc3 Nd7 14.f4 ef3 15.Bf3 Ne5 (15...Nc5 16.Qc2=+) 16.Qe2 (16.Bb7 Nd3 17.Ke2 Rab8+=) 16...Bf5 (better 16...Nf3 17.Qf3 Rfb8=+) 17.Nf5+= Qf5 18.0-0 (18.Be5!? Qe5 19.0-0+/-) 18...Nf3= 19.Qf3 Qf3 20.Rf3 Rae8 (20...a6 21.ba6 Ra6 22.e4=) 21.a5 Be5 22.Rc1 Bd6 23.a6 (23.Bd4 Ra8+=) 23...ba6= 24.ba6 Rb8 (24...c5 25.Rb1=) 25.Bd4+= Rb5 26.Ba7 (26.Rc6!?+/-) 26...Ra5 27.Bd4 Ra6 28.Bc3 f6 29.Rf5 Rfa8 30.Rd5 Ra2 31.Kf1 Re8 (31...R8a6 32.Ke2=+) 32.Ke2= Kf7 33.Kd3 Ke6 34.Rd4 Be5 35.Rc4 Kd5?? (35...Rd8 36.Ke4 f5 37.Kf3 Bc3 38.R4c3 Rdd2 39.Rc6 Rd6 40.Rc7 Rh2 41.Rg7=) 36.Bd4 (36.Be5 fe5 37.Rc7 Ra3 38.Ke2 Rg8+/-) 36...Bd4?? (better 36...Rd8=) 37.Rd4+- Ke6 38.Rc6 Kf7 39.Rc7 Kg6? (39...Re7 40.Rdd7 Rd7 41.Rd7 Kg6 42.e4+/-) 40.Rdd7 (40.Rg4!? Kf5 41.Rgg7 Rd8 42.Rgd7 Rd7 43.Rd7 Ra3 44.Ke2 h6+-) 40...Ra3 41.Ke2 Rg8 42.h4 Ra2 43.Kf3 h5 44.g4 (44.e4 Kh6+-) 44...hg4+/- 45.Kg4 Ra4 46.d4 f5 (46...Ra1!?+/-) 47.Kf4+- Ra2 48.Rc6 Kh5 49.Kf5 Rf2 50.Ke4 Rf3?? (50...Rh2+-) 51.Kf3 Rf8 (51...Kh4 52.Rf7 Kg5 53.e4+-) 52.Ke4 (52.Kg3!? Rf6 53.Rf6 gf6+-) 52...Re8 53.Kd3 (better 53.Kf4!? Rf8 54.Kg3 Rf6 55.Rf6 gf6+-) 53...Rg8 54.Rd5 g5 (54...Kh4 55.Rg6+-) 55.Rg6! Rg6 (55...Rg6; 55...Kg6 56.Rg5 Skewer) 56.Rg5 Rg5 57.hg5 Kg5 58.Kc4 Kf6 59.Kc5 Ke7 60.Kc6 Kd8 61.d5 Ke8 62.d6 Kd8 63.d7 (63.e4 Ke8 64.e5 Kf8 65.Kd7 Kf7 66.e6 Kf6 67.e7 Kg6 68.e8Q Kf6 69.Kc6 Kf5 70.d7 Kg5 71.d8Q Kf5 72.Qf7 Ke4 73.Qdd5 Ke3 74.Qff3) 63...Ke7 64.Kc7 Ke6 65.d8Q Ke5 66.Qd4 Kf5 67.e4 Kg5 (67...Kg4 68.Qf6 Kh3 69.e5 Kg3 70.e6 Kg2 71.e7 Kh2 72.e8Q Kh3 73.Qeg6 Kh2 74.Qh4) 68.e5 Kf5 69.e6! Ke6 (69...Ke6 70.Qe4 Combination) 70.Qe4 Kf6 (70...Kf7 71.Kd6 Kf6 72.Qe5 Kf7 73.Qe6 Kg7 74.Ke7 Kh7 75.Kf7 Kh8 76.Qh3) 71.Kd6 Kf7 (71...Kg7 72.Ke6 Kh6 73.Qg4 Kh7 74.Kf6 Kh6 75.Qg6) 72.Qe5 Kg6 73.Qf4 (73.Ke6 Kh6 74.Kf6 Kh7 75.Qc7 Kh6 76.Qh2) 73...Kg7 74.Qf5 (74.Ke6 Kg6 75.Qg3 Kh5 76.Kf5 Kh6 77.Qg6) 74...Kh6 75.Qg4 Kh7 76.Ke6 Kh6 77.Kf6 Kh7 78.Qg7 1-0. BeepBeepImAJeep (2735) - Erow (2640), lichess.org, 2020.

6.c4 Re8 7.Nf3 c5 8.Be2 (8.Bf6 Qf6 9.Nc3 dc4=) 8...e5=+ 9.cd5 Nd5 (9...e4 10.Ng1 Nd5 11.d3 ed3 12.Qd3-/+) 10.Nc3 Nb4 (10...Nc3 11.dc3 e4 12.Nd2=+) 11.0-0 (11.Ne4 Bf5 12.d3 a6=) 11...e4=+ 12.Ne1 Bf5 13.f4 Nd7 (13...Qh4 14.Qb3=+) 14.Nc2 (better 14.g4!? Be6 15.Ne4+=) 14...Nd3 15.Ba3 (15.Bd3 ed3 16.Na3 Nf6=+) 15...h6 16.Ne1 Rc8 (16...Nb4 17.Rc1=+) 17.Nd3 (17.Ne4!? Be4 18.Bd3 Bd3 19.Nd3+=) 17...ed3= 18.Bf3 b6 19.g3 (19.e4 Be6 20.e5 Bf8=) 19...Nf6=+ 20.Re1 Bf8 21.e4 (21.a5 ba5 22.Qa4 Rb8=+) 21...Be6 (better 21...Qd4!? 22.Re3 Ne4 23.Be4 Be4 (23...Re4?! 24.Ne4 Be4 25.Bb2=+) 24.Ne4 Re4-/+) 22.Kg2 c4 (22...Be7 23.f5 Bc4 24.e5=) 23.Bb2 (23.Bf8 Kf8 (23...Rf8? 24.f5+-) 24.f5 Bd7+=) 23...Bc5= 24.Nb1 Bd4 25.Bd4 Qd4 26.Nc3 Bd7 Will e4 fall? (26...Re7 27.a5=) 27.Re3 (27.e5 Nh7+=) 27...Nh7 (27...a5 28.Rc1=) 28.Qe1 g5 29.Rc1 (29.e5 gf4 30.Re4 Qc5 31.gf4 Kh8+=) 29...gf4 (29...g4 30.Bd1=+) 30.gf4= Kh8 31.Kh1 Rg8 32.Bg2 Nf6 (32...Rg4 33.Bh3 Rg6 34.Bd7 Qd7 35.Qh4=) 33.Rg3 (33.e5!? Nh7 34.Qh4+=) 33...Rg3 34.Qg3 Rg8 35.Qf3 Ng4 (35...Bg4 36.Qf1=) 36.h3 Nf6 (36...Nf2 37.Kh2 Bg4 38.hg4 Ng4 39.Kh3 Nf2 40.Kh2 Ng4 41.Kh1 Nf2 42.Kh2 Ng4=) 37.Kh2 (37.e5 Ne8 38.Nd5+=) 37...h5 (better 37...Be6!?=) 38.e5+/- Bg4 39.Qe3 (39.Qf1 Be2 40.Ne2 de2 41.Qe2 Qf4 42.Kh1 Re8+-) 39...Qe3 40.de3 d2 41.Rb1 (41.Rb1 Bf5 42.Rb2 Rg2 43.Kg2=+) 1-0. BeepBeepImAJeep (2700) - speedytiger301 (2445), lichess.org, 2019.

6.Be2 b6 7.Nf3= Bb7 8.0-0 Nbd7 9.Ng5 (9.d4 c5=) 9...h6 10.Nf3 a6 11.c4 dc4 12.Bc4 (12.Na3 Ng4 13.h3 Nge5=+) 12...Nc5 (better 12...Ng4!? 13.Re1 Bf3 14.gf3 Nh2-+) 13.Be2 Nh7 (13...c6 14.Nc3=) 14.Nc3 (14.d4 Ne4=) 14...Qf6 (14...ab5 15.ab5 Ra1 16.Ba1=) 15.Qc2 (15.d4 Ne4+=) 15...Ng5 16.Ne1 (better 16.Nd4=) 16...h5 (16...e5=) 17.Nd5?? (better 17.f4!? Nh7 18.d4+-) 17...Qh6 (better 17...Nh3! 18.gh3 Qg5 19.Kh1 Bd5 (worse 19...ed5 20.Bg7 d4 21.f3 Qg7 22.Rg1+-) 20.f3 e5-/+) 18.Nf4= h4 19.Nh5 f5?? (better 19...h3 20.g3 f6=) 20.Bg7+- (20.Ng7 f4 21.f3 h3 22.ef4 hg2 23.Ng2 Nh3 24.Kh1 Nf4 25.Nf4 Rf4-+ (worse 25...Qf4 26.Rf2 Kf7 27.Nh5=; 25...Bf4?! 26.Rf2=+)) 20...Qg6 21.Bd4?? (better 21.Bf8 Kf8 22.ba6 Ba6 23.d4 Be2 24.Qe2+- (24.dc5?! Bh2 25.Kh2 Bf1+-)) 21...Nh3=+ 22.Kh1 Ng5?? (better 22...Ne4 23.f4 ab5 24.ab5 Ra1 25.Ba1 Bd5=) 23.Nf4+- Bf4 24.ef4 Nge4 25.Be3 Kh7? (25...ab5 26.Bb5 h3 27.Rg1+-) 26.d3 (26.d4!? Nd7 27.Qc7 Bd5+-) 26...Nd6 (26...h3 27.Rg1 (27.de4? Be4 28.Rg1 Rg8 29.Qe4 Ne4-+) 27...hg2 28.Ng2+-) 27.d4 Nd7?? (better 27...Be4 28.Qc3 Nd7+-) 28.Qc7 Rf7 (28...h3 29.f3 (29.Qd7?! Rf7 30.Qf7 Qf7 31.ba6 Ba6 32.Ba6 hg2 33.Ng2 Ra6=; 29.Qd6?? Bg2 30.Kg1 Bf3 31.Ng2 Qg2) 29...Rf7 30.Qd6 ab5 31.Bb5+-) 29.f3 (29.Qd6 h3 30.f3 ab5 31.Bb5 Ba6 32.Ba6 hg2 33.Ng2 Ra6+-) 29...h3 (29...e5 30.de5 Ne5 31.Qb6+-) 30.Rg1 (30.Qd6 ab5 31.Bb5 Ba6 32.Ba6 hg2 33.Ng2 Ra6+-) 30...hg2 (30...e5 31.de5 Ne5 32.Qb6 Nd7+-) 31.Rg2 Qh6 32.Qd6 Rh8 (32...ab5 33.Bb5 Bd5 34.Bd7+-) 33.Bd3 (better 33.Bc4 Bd5 34.Bd5 ed5 35.Qd5+-) 33...Nf6 (33...ab5 34.Bb5 Bd5+-) 34.Qe6 Rg7 (34...Rhf8 35.Qf5 Kh8 36.ba6+-) 35.Qf5 (35.Bf5 Rg6 36.Qf7 Qg7 37.Bg6 Kh6 38.f5) 35...Rg6 36.Rg6 Qg6 (36...Re8 37.Rh6 Kg8 38.Qg5 Kf8 39.Qf6 Kg8 40.Rh8) 37.Qd7! (37.Qg6?!=) 37...Kh6 (37...Nd7 38.Bg6 Combination) 38.Qh3 (better 38.f5 Kh5 39.Qb7 Qh7+-) 38...Kg7 (38...Qh5 39.Qh5 Kh5 40.ba6+-) 39.Bg6 (39.Bg6 Rh3 40.f5+-) 1–0. Akrapovik (1605) – Doaiepor, lichess.org, 2019.

7.Nf3 dc4 8.Bc4 Nbd7 9.0-0 h6 (9...cb5 10.ab5 e5 11.d3=) 10.d4 cb5 11.ab5 b6 12.Be2 Bb7 13.Nbd2 Qe7 14.Nc4 Nd5? (better 14...Bb4+=) 15.Nd6+- Qd6 16.Ba3 Qc7 17.Rc1 Qd8 18.Bf8 Qf8 19.Ne5 (19.Qd2 a5+-) 19...N7f6 (19...Ne5 20.de5 Qe7 21.Qd4+-) 20.Bf3 Qd6 21.Nc6 a6? (21...Qd7+-) 22.e4 1-0. BeepBeepImAJeep (2640) - themantheman16 (2050), lichess.org, 2016.

7.Nf3 Qe7 8.Be2 e5 9.0-0 (9.d4 e4 10.Ne5 dc4 11.Nc4 Bb4 12.Bc3 Be6=) 9...e4-/+ 10.Nd4? (10.Ne1 dc4 11.bc6 Nc6-+ (worse 11...bc6 12.f3=+)) 10...c5?? (better 10...Qe5 11.g3 c5-+) 11.Nc2=+ Nbd7 (11...dc4 12.Nba3=+) 12.cd5= Nd5 13.Nc3 (13.d3 N5f6=) 13...Nc3 14.Bc3 Ne5 15.f4 ef3 16.Bf3 Nf3 17.Qf3 Be5 (17...Be6!?=) 18.Be5+= Qe5 19.Na3 (19.d4 Qg5+=) 19...Rb8 20.Nc4 Qe6 21.Na5 b6 22.Nc6 Rb7 23.d4 cd4 (23...Re8 24.Rac1 Qe3 25.Qe3 Re3 26.dc5+=) 24.ed4+/- Rd7 25.Rad1 White prepares the advance d5 25...Bb7 (25...Qa2 26.Ne5 Rc7 27.Ra1+=) 26.d5+/- Qg6? (26...Qd6 27.Rfe1+/-) 27.Rfe1 (better 27.Ne5 Qd6 28.Nd7 Qd7 29.Qf5+-) 27...h5?? (better 27...Qd6+/-) 28.Ne7 Re7 29.Re7 Qd6 (29...Bc8 30.h3 Rd8+-) 30.Rb7 1-0. BeepBeepImAJeep (2725) - Il_Colonno (2385), lichess.org, 2020.

8.d4 Re8 9.Be2 Qe7 10.0-0 dc4 11.Bc4 e5 12.de5 Ne5 13.Ne5 Be5 14.Be5 Qe5 15.Nd2 Bg4 16.Be2 Be2 17.Qe2 c5 18.Nc4 Qe6 19.Na5 b6 20.Nc6 a6 21.Rad1 ab5 22.ab5 Nd5 23.Qf3 (23.Ra1!?=) 23...Nc3-/+ 24.Rc1 (24.Rd3 Nb5 25.Rfd1 Qe4 26.Qe4 Re4-/+) 24...Nb5 25.Rb1 (better 25.Ra1!? Ra1 26.Ra1-/+) 25...Nc3-+ 26.Rb6 Rac8?? (26...Rec8 27.g3-+) 27.Ra6?? (better 27.Ra1=) 27...Ne4-+ 28.Nb4 (28.Nd8 Qc4 29.Qf7 Qf7 30.Nf7 Kf7-+) 28...Qc4 (28...cb4?! 29.Re6 Re6 30.Qf5+=) 29.Ra7 (29.Rfa1 cb4 (worse 29...Qb4 30.Ra7 Qb3 31.R7a3-+) 30.h3 b3-+) 29...cb4 (better 29...Qf1 30.Kf1 Nd2 31.Ke2 Nf3 32.Nd5 Nd4 33.Ke1-+) 30.Rb7 (30.Rd1-+) 30...Nd2 31.Qd1 Nf1 32.Qh5 (32.Qf1 Qf1 33.Kf1-+) 32...Nd2 (32...Ne3 33.Qd1 Nd1 34.Re7 Re7 35.g3 Re1 36.Kg2 Ne3 37.fe3 Qf1) 33.h4-+ Qf1 34.Kh2 Qf2 35.Rf7 Qf7 (35...Qf7 36.Qf7 Kf7 37.e4 b3 38.e5 b2 39.Kg3 b1Q 40.e6 Ke6 41.Kh2 Qe4 42.Kh3 Rc3 43.g3 Nf1 44.h5 Rg3) 0-1. BeepBeepImAJeep (2745) - jeden94 (2470), lichess.org, 2020.

8.Be2 e5 9.0-0 e4 10.Nd4 Ne5 (10...Nb6 11.cd5 c5 12.Nc2=+) 11.bc6 bc6 12.cd5 cd5 13.f4 ef3 14.Nf3 Qe7 15.Nc3 Bb7 (15...Nf3!? 16.Bf3 Qe5=) 16.Nb5+/- Bb8 (16...Nf3 17.Rf3 (17.gf3?! Bc5=) 17...Ne8 18.Nd6 Nd6 19.Bd4+=) 17.Ba3 (17.Ne5 Be5 18.Ba3 Qe6 19.Bf8 Rf8+-) 17...Qe6 (17...Nf3 18.gf3 Qd7 19.Bf8 Kf8+/-) 18.Nbd4?? (better 18.Nfd4 Qd7 19.Bf8 Kf8 20.Nf5+-) 18...Nf3+= 19.Rf3 Qe5 20.g3 (20.Bf8?? Qh2 21.Kf2 Ne4 22.Ke1 Bg3 23.Rg3 Qg3 24.Kf1 Qf2) 20...Rc8 (20...Bd6 21.Rb1 Ba3 22.Rb7=) 21.Rf5 (21.Nf5!? Kh8 22.Rb1+-) 21...Qe8 22.Bf3 Attacking the isolated pawn on d5 (better 22.Rb1!? Bc6 23.Nc6 Qc6 24.Bb2+/-) 22...Be5=+ 23.Bb2 Rab8 (23...g6 24.Rg5 h6 25.Re5 Qe5 26.Rb1=+) 24.Bc3 (24.Rb1 Nd7 25.Nb5+=) 24...g6 (24...Ne4 25.Be4 de4 26.Nb5 Bc3 27.dc3=+) 25.Rg5 (25.Re5 Qe5 26.Nc6 Qc7 27.Nb8 Ne4+/-) 25...h6 (better 25...Ne4 26.Be4 Bf6 27.Bg6 Bg5 28.Bh7 Kh7 29.Qh5 Bh6=) 26.Re5!+/- Qe5 27.Nb5?? (better 27.Nc6! Qg5 28.Nb8 Rb8 29.Bd4+-) 27...Rc3!-/+ 28.Nc3 (28.Nc3 d4 Double attack (28...d4 Decoy); 28.dc3 Qe3 Combination) 28...d4 29.ed4 Qd4 30.Kg2 (30.Kh1 Ne4 31.Qg1 Qd3 32.Be4 Be4 33.Ne4 Qe4 34.Qg2 Rb1 35.Rb1 Qb1 36.Qg1 Qe4 37.Qg2 Qa4 38.Qa8 Kg7-/+) 30...Bf3-+ 31.Qf3 Rb2 (31...Qd2!? 32.Ne2 Re8-+) 32.Rd1 Kg7 (32...Ng4 33.Ne2 Qa4 34.Rf1-/+) 33.Ne2? (33.Qf2 Qd7=+) 33...Qd5 (better 33...Qa4!? 34.Rf1 Qe4-/+) 34.Qd5=+ Nd5 35.Kf3 Ra2 36.Ke4 Nf6 37.Kf3 Ra4 38.d4 Nd5 (38...Ra3 39.Kg2-/+) 39.Rd3 f5 40.Nf4 Ra5 41.Ne6 Kf6 42.Nc5 Nb6 (42...Ra2 43.h3-+) 43.Nb3 (43.Re3 Ra2-/+) 43...Rd5 (43...Ra3 44.Ke2-+) 44.Ke3 g5 45.Ke2 Rd6 46.Nd2 Rd7 47.Nf3 Re7 48.Ne5? (better 48.Kf2!?-/+) 48...Nd7 (48...Nc4 49.Kf2 Ne5 50.de5 Re5 51.Rd6 Re6 52.Rd5-+) 49.Kf2 (49.Ra3 Ne5 50.Ra6 Kg7 51.de5 Re5 52.Kf3 Re7-+) 49...Ne5 50.de5 Re5 51.Ra3 Re6?? (better 51...a5-+) 52.Ra6?? (52.Ra7 Rb6-/+) 52...f4 (better 52...Ra6 53.h3 Ra3-+) 53.Ra5 (53.Ra7 Kf5-/+) 53...Re5 (53...fg3 54.Kg3 a6 55.Kf3-+) 54.Ra3? (better 54.Ra7 Kf5 55.gf4 gf4 56.Rh7-/+) 54...Re6 (54...a5 55.gf4 gf4 56.Ra4-+) 55.Kf3?? (55.Ra5 fg3 56.hg3-+) 55...fg3-+ 56.Kg3 Kg6 (56...a6 57.Kf3-+) 57.Kg4? (better 57.Ra7!? h5 58.Ra3-/+) 57...h5-+ 58.Kg3 h4 59.Kf3 Kf5 (59...a6 60.Ra5-+) 60.Kf2 (60.Ra7 g4 61.Kf2 Rc6-+) 60...Re4 (better 60...a6-+) 61.Rf3?? (better 61.Ra7 Rc4 62.Ra2-+) 61...Rf4 62.Kg2 Rf3 63.Kf3 g4 64.Kf2 g3! 65.hg3 hg3 66.Kg3 ½-½. BeepBeepImAJeep (2610) - skulas (2335), lichess.org, 2016.

8.Be2 e5 9.0-0 Qe7 10.Nc3 e4 11.Nd4 Ne5 (11...dc4 12.Qc2=) 12.bc6 bc6 13.cd5 cd5 14.Ncb5 Bb4 15.f4 ef3 16.Nf3 Nc4 (16...Nf3 17.Rf3 (worse 17.gf3 Bh3=+) 17...Ne4 18.d3=) 17.Bd4 (17.Bf6 Qf6 18.Nc7 Rb8 19.Nd5 Qc6 20.Nb4 Rb4+/-) 17...Bg4 (17...Ne4 18.Bc4 dc4 19.Qc2=) 18.h3 (18.Bf6 Qf6 19.Nc7 Rad8 20.Nd5 Rd5 21.Bc4 Rd7+/-) 18...Bh5 (better 18...Bf3!? 19.Bf6 gf6 20.Bf3 Nd2 (worse 20...Bd2 21.Bd5 Be3 22.Kh1+/-) 21.Bd5 Qe3 22.Kh1 Nf1 23.Qg4 Qg5 24.Ba8 Qg4 25.hg4 Ne3-/+) 19.Nh4 (19.Bf6 Qf6 20.Nc7 Rad8 21.Nd5 Rd5 22.Bc4 Rdd8+=) 19...Be2+= 20.Qe2 Bd2 21.Rf6 gf6?? (better 21...Be3 22.Rf2 Bf2 23.Qf2 Qd7+=) 22.Qg4+- Kh8 23.Nf5 Be3 24.Be3 Rg8 25.Qg8!! (25.Ne7?! Rg4 26.Ba7 Rg3+-) 25...Rg8 (25...Rg8 26.Ne7 Double attack (26.Ne7 Decoy; 26.Ne7 Zwischenzug); 25...Kg8 26.Ne7 Double attack (26.Ne7 Zwischenzug)) 26.Ne7 Re8 (26...Ne3 27.Ng8 Kg8 28.Na7+-) 27.Nf5 (better 27.Bd4 Kg7 28.Nd5 a6+-) 27...Ne3 (27...Re5 28.Ba7 Rf5 29.Nc3+-) 28.Re1 d4 (28...Nf5 29.Re8 Kg7 30.Na7+-) 29.Nbd4 1-0. BeepBeepImAJeep - dincerT (2630), lichess.org, 2017.

8.Be2 Re8 9.0-0 e5 10.d4 e4 11.Nfd2 Qc7 12.h3 Nf8 13.c5 Be7 14.Nc3 Ng6 15.Re1 Nh4 16.Nf1 Bd8 17.a5 Bh3? (better 17...Nf5!?=) 18.gh3+/- Qd7 19.Bg4?? (19.Nd2 Qh3 20.Bf1+=) 19...Qe7?? (19...Ng4!? 20.Qg4 Nf3 21.Kh1 Qg4 22.hg4 Ne1 23.Re1 Ba5 24.bc6 bc6-/+) 20.b6?? (20.Nd2 Ng4 21.Qg4 a6+-) 20...a6?? (20...ab6 21.ab6 Ra1 22.Ba1 Ng4 23.hg4 Nf3 24.Kg2 Qh4-/+ (24...Ne1?! 25.Qe1 Qh4 26.Qe2=+)) 21.Nh2+- g6 22.Kh1 h5 23.Be2 Qe6 24.Rg1 (24.Bf1 Qf5+-) 24...Qh3 25.Rg3 Qf5 26.Qg1 Kh7 27.Rf1 Ng8? (27...Qe6 28.Rd1+/-) 28.Bc1 (28.f3!? ef3 29.Nf3 Qe6+-) 28...Nh6 (28...Qe6!? 29.f3 Nf5 30.Rg2 ef3 31.Bf3+- (31.Rf3?! Nh4+=)) 29.f3 ef3 30.Nf3 Nf3 31.Rgf3 (31.Rff3?! Qc2 32.e4 de4+/-) 31...Qe6 32.Rf4 (32.Bd3 f5+-) 32...f5 (32...Qh3!? 33.Qh2 Qh2 34.Kh2 Bg5+/-) 33.R4f3 Ng4 34.Rg3 Bh4 35.Rg2 (35.Rh3 Bf6+-) 35...Ne3 36.Be3 (36.Rh2!? Bg3 37.Qg3 Nf1 38.Bf1+-) 36...Qe3+/- 37.Qe3 (better 37.Bh5 Qg1 38.Rfg1 gh5 39.Rh2+=) 37...Re3=+ 38.Rf3 Rae8 39.Re3 Re3 40.Nd1? (better 40.Nd5!? cd5 41.c6 bc6 42.Ba6-/+) 40...Re4 41.Bf3 (better 41.Ba6 ba6 42.b7-+) 41...Rd4 42.Kh2 Bf6 43.Re2 (43.Rc2 Ra4 44.Ne3 d4-+) 43...Kh6 (better 43...Rd1 44.Re6 Rd2 45.Kh1-+) 44.Re6 Kg7 45.Kg2 Kf7 (45...Ra4!? 46.Rd6 Ra5 47.Rd7 Kh6 48.Rb7 Rc5 49.Ra7-+) 46.Rd6 Ke7 (better 46...Rd2 47.Kh1 Be5 48.Rd7 Ke6 49.Rb7 g5 50.Bh5 Rh2 51.Kg1 Rh5-+) 47.Nf2? (47.Ne3 Rd2 48.Kh1 d4 49.Nd5 cd5 50.Bd5 Re2 51.Bb7 Be5-/+) 47...g5 (better 47...Ra4 48.Nd3 Ra5 49.Kf1-+) 48.Nh3?? (better 48.Bh5 Rd2 49.Kf1-+) 48...g4 49.Nf2 (49.Be2 gh3 50.Kh3 Rd2 51.Rf6 Kf6 52.Bh5 Rc2-+) 49...gf3 50.Kf3 Rc4 (better 50...h4-+) 51.Ke3 (51.Nd3 Rc3 52.Kf4-+) 51...Rc5 52.Kd3 (52.Rf6 Kf6 53.Nd3 Ra5-+) 52...Kd6 53.Ne4 de4 54.Ke2 Ra5 (54...Rc2 55.Kd1 Ra2 56.Ke1 e3 57.Kf1 Bh4 58.Kg1 e2 59.Kg2 e1Q 60.Kf3 Qe4) 55.Kd1 (55.Kf2 Ra2 56.Kg1 e3 57.Kf1 e2 58.Kf2 c5 59.Kf3 e1Q 60.Kf4 Qf2) 55...Ra3 (55...Ra2 56.Ke1 e3 57.Kf1 e2 58.Kf2 c5 59.Kf3 e1Q 60.Kf4 Qf2) 56.Ke2 (56.Kc2 e3 57.Kd1 Ra2 58.Ke1 Bh4 59.Kf1 e2 60.Kg2 e1Q 61.Kf3 Qe4) 56...Ra2 57.Kd1 (57.Kf1 e3 58.Kg1 e2 59.Kf2 c5 60.Kf3 e1Q 61.Kf4 Qf2) 57...e3 58.Kc1 (58.Ke1 Bh4 59.Kf1 e2 60.Kg2 e1Q 61.Kf3 Qe4) 58...f4 (58...e2 59.Kb1 Rb2 60.Kc1 e1Q) 59.Kb1 h4 (59...Rb2 60.Kc1 f3 61.Kd1 e2 62.Ke1 Bh4) 60.Ka2 e2 61.Kb3 (61.Kb1 e1Q 62.Kc2 Qe2 63.Kb3 Qb2 64.Ka4 Qa2 65.Kb4 c5) 61...e1Q 62.Kc4 (62.Kc2 Qe2 63.Kb3 Qb2 64.Ka4 Qa2 65.Kb4 c5) 62...Qe2 (62...Qc3) 63.Kb3 Qe3 (63...Qb2 64.Ka4 Qa2 65.Kb4 c5) 64.Ka4 (64.Kc2 f3 65.Kd1 f2 66.Kc2 Qc3 67.Kd1 f1Q) 64...Qe4 (64...c5 65.Ka5 Qa3) 65.Ka5 (65.Ka5 Bc3; 65.Ka3 Qd3 66.Ka2 Qc3 67.Kb1 Qb2). BeepBeepImAJeep (2745) - jeden94 (2465), lichess.org, 2020.

8.Be2 Re8 9.0-0 e5 10.d4 e4 11.Nfd2 Nf8 12.Re1 Ng6 13.Nf1 (13.c5 Bb8=) 13...h6 (13...dc4 14.bc6 Qb6 15.cb7 Bb7 16.Qc2=) 14.Nc3 Be6 15.Rc1 (15.c5 Bc7=) 15...Qa5 (15...dc4 16.Nd2=+) 16.bc6 bc6 17.cd5 cd5 18.Bb5 (18.Nb5!? Bb4 19.Bc3=) 18...Rec8=+ 19.Qb3 (19.Rc2 a6 20.Be2 Rc7=+) 19...Rab8 (19...a6 20.Be2 Rab8 21.Qc2-/+) 20.Qa2 (20.Ba3 Ne8 21.Bd6 Nd6 22.Qc2-/+ (22.Nd5? Qd8-+)) 20...a6-/+ 21.Be2 Qb4 (21...Rb2!? 22.Qb2 Bb4 23.Ne4 Be1 24.Rc8 Bc8 25.Nf6 gf6=+) 22.Rc2 (22.Ba6 Rc7 (worse 22...Qb2 23.Qb2 Rb2 24.Bc8+-) 23.Bb5 Rbc8=) 22...Ne7 (22...Rc6 23.Rec1=+) 23.Rec1 (23.Ba6 Rc7+=) 23...Kh7 (23...Rc6 24.Rb1 Rbc8 25.a5=) 24.Bd1 (better 24.Ba6!? Rc7 25.Nb5 Rc2 26.Rc2+=) 24...Nd7 25.Ba1 Nb6 26.Rb1 Qa5 27.Ne2 (27.Nd2 Nc4 28.Rb8 Rb8 29.Nc4 dc4=+) 27...Nc4 (27...Nc6!? 28.Bc3 Qa4 29.Ra1 Qa2 30.Rca2-/+ (30.Raa2? Ra8-+)) 28.Rb8 Rb8 29.Nf4 Bf4 30.ef4 Nf5 31.Bc3 Qb6 32.Be2 (32.a5!? Qd6 33.g4-/+) 32...Nd4-+ 33.Bd4 Qd4 34.Bc4 dc4 35.Ne3 (35.f5 Bf5 36.Rc4 Qd1-+) 35...c3 36.h3?? (better 36.Qa1-+) 36...Ba2 37.Ra2 Qd3 38.Rc2 Rb2 39.Rc1 c2 40.Kh2 g5 (40...Qd2 41.Rc2 Rc2 42.Nc2 Qf2 43.Nb4-+) 41.f5 f6 (41...Qd6 42.g3 Qd2 43.Rc2 Rc2 44.Nc2 Qf2 45.Kh1 Qc2 46.h4 gh4 47.gh4 e3 48.a5 e2 49.Kg2 e1Q 50.Kh3 Qe3 51.Kg4 Qce2) 42.g3 h5 (42...Qd2 43.Rc2 Rc2 44.Nc2 Qf2 45.Kh1 Qc2 46.h4 e3 47.hg5 e2 48.g6 Kg7 49.Kg2 e1Q 50.Kh3 Qh1 51.Kg4 Qa4) 43.Kg2 Kg7 44.g4 Qd2 45.Rf1 c1Q 46.gh5 (46.a5 Qf1! 47.Nf1 Qf2 48.Kh1 Qf1) 46...Qf1! 47.Kg3 (47.Nf1 Qf2 Mate attack; 47.Kf1 Qf2 Mate attack) 47...Qdf2 48.Kg4 Qf3 0-1. BeepBeepImAJeep (2660) - c0vj3k (2140), lichess.org, 2017.

5.c4 c6 6.d3 Bd6 7.bc6 bc6 8.cd5 cd5 9.Nf3 0-0 10.Nc3 e5 11.e3 d4 12.ed4 ed4 13.Ne4? (better 13.Nd4 Qb6 14.Ndb5-+) 13...Ne4-+ 14.de4 Bb4 15.Nd2 Rb8 16.Bc4? (16.Ba3 Qa5 17.Bb4 Rb4-+ (17...Qb4?! 18.Bc4-/+)) 16...Qc7 (better 16...Ne5 17.0-0 Bd2 18.Bf7 Rf7 (18...Kf7?! 19.Qd2 Nc6 20.Rfc1-+; 18...Nf7?! 19.Qd2 Ba6 20.Rfc1-+) 19.Qd2 Ba6 20.Bd4 Rd7 21.Qa2 Bc4 22.Be5 Ba2 23.Bb8 Bc4-+) 17.Rb1?? (better 17.Bb5 Bc3 18.Ba3-+) 17...Bd2 (better 17...Qc4! 18.Qe2 Ne5 19.Qc4 Nc4-+) 18.Qd2 Qc4 19.Rc1 Qb4 (better 19...Qe6 20.0-0 d3-+) 20.Qb4 Rb4 21.Ba3 Ra4 22.Bf8 Nf8 23.0-0 Be6 24.Rfd1?! (24.Ra1 Bb3 25.Ra4 Ba4-+) 24...g6 (24...Bb3 25.Rd2-+) 25.f4 (25.Ra1 Rb4-+) 25...Nd7 26.Rc8 (26.Rc6 Bg4 27.Rd2 Nb6-+) 26...Kg7 27.Rc7 (27.h3 a5 28.Rc6 Bb3-+) 27...Nb6 (27...Nf6!? 28.e5 Nd5 29.Rcc1-+) 28.Rb7 (28.Rc6-+) 28...Bc4 (better 28...Bg4 29.Rd2 Nd7-+) 29.g4?? (better 29.Rd4 Ra1 30.Kf2 Ra2 31.Kg1-/+) 29...d3 (better 29...Be2 30.Rd2 d3 31.Kg2-+) 30.f5 g5 31.h4 (31.Kf2 Bb5 32.e5 Ra2 33.Ke3 Re2 34.Kd4 d2 35.Ra7 Ba4 36.Ra4 Na4-+) 31...Ra2 (better 31...gh4 32.Kf2 Ra2 33.Ke3 h3-+) 32.h5 (32.hg5 Re2 33.Rb8-+) 32...h6 (better 32...d2!? 33.e5 Bd5 34.Rc7-+) 33.e5 Nd5 34.f6 Kg8 35.e6 (35.Rb8 Kh7 36.Rc8 Ne3 37.Rc4 Nd1-+) 35...fe6 (better 35...Nf4 36.Rb8 Kh7 37.Rd8 Be6 38.R1d3 Nd3 39.Rd3 Bg4 40.Rd5-+) 36.f7 (36.Rdb1 Kf8 37.Rh7 Nf6 38.Rb8 Ne8 39.Rbb7-+) 36...Kf8 37.Rf1 (37.Rd7 Nf4 38.Rf1-+) 37...Nf4 38.Rb8 Kf7 39.Rbb1 Bd5 (39...Rg2 40.Kh1 Bd5 41.Rf4 gf4 42.Rf1 Rg4 43.Kh2 Rh4 44.Kg1 d2 45.Rd1 Rh1 46.Kf2 Rd1 47.Ke2 Bf3 48.Kd3 Be4 49.Ke2 Bc2 50.Kf2 Rb1 51.Kf3 Rf1 52.Kg2 d1Q 53.Kh3 Qh5 54.Kg2 Qh1) 40.Rbd1 (40.Rf2-+) 40...Rg2 41.Kh1 Re2 (41...Rf2! 42.Kg1 Nh3) 42.Kg1-+ Rg2 43.Kh1 Rg4 (43...Rf2 44.Kg1 Nh3) 44.Kh2 (44.Rf3 Bf3 45.Kh2 Ne2 46.Rd3 Rh4) 44...Rg2 45.Kh1 g4 (45...Rf2 46.Kg1 Nh3) 46.Rg1 (46.Rf4 Ke7 47.Rd3 Rd2 48.Rd5 Rd5 49.Rc4 Rh5 50.Kg2-+) 46...Rf2 47.Rg2 Bg2 48.Kg1 (48.Kh2 Ne2 49.Rd3 Bd5) 48...Re2 (48...g3 49.Rd3 Ne2) 49.Re1 (49.Rc1 d2 50.Rc7 Ke8 51.Rc8 Kd7 52.Rd8 Kd8 53.Kh2 Bf3 54.Kg3 d1Q 55.Kf4 Qd6) 49...Bf3 (49...Re1 50.Kf2 d2 51.Kg3 d1Q 52.Kh4 Nh5 53.Kh5 Rh1) 50.Re2 (50.Kf1 d2 51.Ra1 Nh5 52.Ra7 Kg6 53.Ra1 Rg2 54.Ra5 d1Q) 50...de2 51.Kf2 Kf6 (51...Ng2 52.Kg3 e1Q 53.Kh2 Qf2 54.Kh1 Nf4) 52.Ke1 Kg5 (52...g3 53.Kd2 g2 54.Kc2 g1Q 55.Kb3 Qb6 56.Kc2 Qb4 57.Kc1 e1Q 58.Kc2 Be4) 53.Kd2 Kh5 54.Ke1 Kg5 55.Kd2 g3 56.Ke1 (56.Kc3 e1Q 57.Kc4 g2 58.Kb3 g1Q 59.Kc4 Bd5 60.Kb5 Nd3 61.Ka6 Qb6) 56...h5 (56...g2 57.Kd2 g1Q 58.Kc3 e1Q 59.Kc4 Bd5 60.Kb5 Nd3 61.Ka6 Qb6) 57.Kd2 ½-½. TimC (2105) - Metamorfos (2445), Rated Bullet game, lichess.org, 2015.

5.e3 b6 6.c4 Bb7 (6...Bd6 7.cd5 ed5 8.Nf3=) 7.cd5= Bd5 8.Nf3 Qb8 (8...Bd6 9.Nc3=) 9.Be2 Qb7 (9...Bd6 10.Nc3=) 10.0-0 Be7 11.d3 Rd8? (better 11...Qb8!?+-) 12.e4+- Be4 13.de4 Qe4 14.Qd3 (14.Nc3 Qb7+-) 14...Qb7 (14...Qd3 15.Bd3 Nc5 16.Bc4+-) 15.Qc4 0-0 16.Nc3 Nb8 (16...Rc8 17.Nd4 Ne5 18.Qa2+-) 17.Rad1 (17.Ne5 Bd6 18.Bf3 Qc8+-) 17...c5 (17...c6 18.Ne5 cb5 19.ab5+-) 18.bc6! Nc6 (18...Qc6 19.Rd8 Decoy; 18...Nc6 19.Nb5 Decoy) 19.Nb5 Rc8 (19...a6 20.Nbd4 Nb4 21.Ne5+-) 20.Qh4 (20.Bf6 gf6 21.Nd6 Bd6 22.Rd6 Rfd8 23.Rd8 Rd8+-) 20...Nd5 21.Qg3 Bf6? (better 21...g6+-) 22.Rd5! Bb2 (22...ed5 23.Bf6 Remove defender) 23.Rg5 (better 23.Rd2 Bf6 24.Nd6+-) 23...Qe7+- 24.Rb1 Bf6 25.Rg4 Nb4?? (25...Rfd8 26.Rc4+-) 26.Ng5 (26.Rgb4 Rfd8+-) 26...Qc5?? (better 26...Nc6+-) 27.Na7 (better 27.Ne4 Be5 28.Rg7 Bg7 29.Nc5 bc5 30.Nd6+-) 27...Qc1 (27...Ra8 28.Ne4 Qe5+-) 28.Rc1 Rc1 29.Bf1 Rd8 (29...Nd5 30.Rc4 Ra1 31.Ne4+-) 30.Qh4 (better 30.Rb4 Rdd1 31.Qb8 Rd8 32.Qb6 Bg5 33.Rb1 Rb1 34.Qb1+-) 30...h6 31.Ne4 (better 31.Qh5 hg5 32.Rb4+-) 31...Rdd1?? (31...Bh4 32.Rh4 Rdd1-+) 32.Nf6+- Kf8 33.Nh7 (33.h3!? Rf1 34.Kh2 Rh1 35.Kg3 Nc6 36.Nd7 Ke8 37.Nc6 Kd7 38.Ne5 Kc8 39.Rc4 Rc4 40.Qc4 Kb8+-) 33...Kg8 34.g3 (better 34.h3!? Rf1 35.Kh2 Kh7 36.Rb4 Rce1+-) 34...Rf1 35.Kg2 Rg1 36.Kh3 Kh7 (36...Nd3 37.Qd8 Kh7 38.Qd3 f5 39.Rb4+-) 37.Rb4 Rc2 (37...Rgf1 38.Qe4 g6 39.Qf4+-) 38.Rb6 (better 38.Qe4 f5 39.Qc2+-) 38...Rf2 (38...Re1 39.Kg2 Ree2 40.Qf4 Rf2 41.Qf2 Rf2 42.Kf2+-) 39.Qe4 (39.Qe4 g6 40.Rb7+-) 1–0. AleksandrNekhoroshik (1730) – jrafafon (1695), lichess.org, 2021.

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 c6 9.0-0 a6 10.Nc3 ab5 11.ab5 Ra1 12.Qa1 dc4 13.Bc4 Nb6 14.Be2 Nbd5 (14...cb5 15.Nb5 Bd7 16.Ba3+=) 15.Nd5+/- cd5 16.Rc1 Ne8 17.d4 Bd7? (better 17...Nd6+/-) 18.Ba3+- Qb6 (18...f6 19.Bf8 Bf8 20.Qa7+-) 19.Bf8 Bf8 20.Ne5 Nf6 (20...Qd8 21.Nd7 Qd7 22.Qa8+-) 21.Nd7 (21.Qa8 h6 22.Qb8 Qa5+-) 21...Nd7 22.Qa8 Kg7 (22...h6 23.Ra1+-) 23.g3 (23.Qc8 Nf6 24.Rc7 Ne4 25.Qb7 Qb7 26.Rb7 Kf6+-) 23...e5 (23...Nf6+-) 24.Qc8 Qd6 (24...Nf6 25.de5 Ne4 26.Qd7+-) 25.Qb7 ed4 26.ed4 (26.Rc6!? Qb4 27.Qd7 de3+-) 26...Be7 (26...Nf6+-) 27.Qc6 1-0. BeepBeepImAJeep (2770) - TheShark180 (2720), lichess.org, 2020.

6.c4 0-0 7.Nf3 dc4 8.Be2 e5 9.Bc4 e4 10.Nd4 Ne5 11.Be2 Bg4 (11...c5 12.bc6 Nc6 13.d3=+) 12.0-0 (12.f3 ef3 13.Nf3 Bf3 14.gf3 Re8=) 12...Qd7 (12...Be2 13.Qe2 Nd3 14.Ba3=+) 13.f4 (13.f3 ef3 14.Nf3 Rfe8=) 13...ef3 (better 13...Nd3!? 14.Qb3 Be2 15.Ne2 Be7-/+) 14.Nf3= Nf3 15.Bf3 Bf3 16.Qf3 Be7 (16...Ng4 17.g3= (worse 17.Qb7 Bh2 18.Kh1 Qe6=+)) 17.d4 (17.Qb7!? Rfb8 18.Qf3+/-) 17...c6 18.Nc3 Rac8 19.h3 (19.Rfd1 Rfe8=) 19...Rfe8 20.Rfe1 (20.bc6!? Rc6 21.Rad1=+) 20...Bb4-/+ 21.Rac1 Bc3 (21...cb5 22.ab5 Bc3 23.Bc3-/+) 22.Rc3=+ cb5 23.ab5 (23.Rc8 Rc8 24.d5 Qd5 (worse 24...Nd5 25.Rd1+/-) 25.Bf6 Qf3 26.gf3 gf6 27.ab5 Rc5=+) 23...Qb5 24.Qf2? (better 24.Rc8 Rc8 25.Ba1-/+) 24...Ne4-+ 25.Rc8 Nf2 (25...Rc8?! 26.Qf4 f5 27.Ba3-+) 26.Re8 Qe8 27.Kf2 Qb5 28.Re2 h6 (better 28...Qf5 29.Ke1 Qe4-+) 29.Rc2?? (29.e4 a5-+) 29...a5 (better 29...Qf5!? 30.Kg1 Qc2 31.Ba3-+) 30.Ba3 (30.g4 a4 31.Rd2 Qg5-+) 30...Qb3 (better 30...Qf5 31.Kg3 Qc2-+) 31.Rc8 Kh7 32.Bc5 (32.Bf8 b5 33.Rc7 b4-+) 32...b6 (32...Qc2 33.Ke1 Qg2 34.Rf8 Qh3 35.Kf2-+) 33.Bd6 (33.Bf8 Qa2 34.Kg1 b5-+) 33...Qe6 (better 33...Qa2!? 34.Kg3 Qe6 35.Rd8 Qe3 36.Kh2 Qd4 37.Bc7-+) 34.Rc6 b5 35.Rb6 a4 (better 35...b4!? 36.Kf3-+) 36.Bc5 Qc4 37.g4 (37.g3 a3! 38.Ba3 Qa2 39.Kf3 Qa3 40.Rb5 Qc1-+) 37...a3! 38.Ba3 Qa2 39.Kf3 Qa3 40.Rb5 Qa1 41.Rf5 Qf1 42.Kg3 Qg1 43.Kf3 Kg8 44.h4 g6 45.Re5 (45.Rf4 Qh1 46.Ke2 Qh4-+) 45...Kg7 (45...Qf1 46.Kg3-+) 46.h5 (46.g5 Qh1 47.Kg3 h5-+) 46...Qh1 47.Kg3 Qg1 48.Kf3 g5 49.Rf5 Qh1 50.Kg3 (50.Ke2 Qe4 51.Rf2 Qg4 52.Kd3 Qh5-+) 50...Qh4 51.Kf3 Qh3 52.Kf2 Qg4 53.Re5 Qh5 54.Kg3 (54.Rc5 Qh4 55.Kf1 Qh2-+) 54...Qg6 (better 54...Qh4 55.Kf3 g4 56.Ke2 Qh2 57.Kd3-+) 55.Kg2 Qd6 (55...Qc2 56.Kg3 f5 57.Rc5-+) 56.Rc5 (56.Kf3 Qf6 57.Kg3 h5-+) 56...Kf6 (56...g4 57.Rf5-+) 57.Kf2 (57.Kf3 h5-+) 57...Qc5! 58.dc5 Ke6 59.Kf3 Kd5 60.Kg4 Kc5 61.Kh5 (61.Kf5 Kd5 62.Kf6 g4-+) 61...Kd5 62.Kg4 (62.Kh6 g4 63.Kg5 g3-+) 62...Ke4 63.Kh5 Ke3 64.Kh6 g4 (better 64...Kf4 65.Kg7 f5 66.Kg6-+) 65.Kg5 g3 66.Kf6 g2 67.Ke7 g1Q 68.Kf8 Qf2 69.Ke7 Qf3 70.Kd6 f5 71.Ke7 f4 72.Ke6 Qe4 (72...Qc6 73.Ke7 f3 74.Kf7 f2 75.Kg7 Qg2 76.Kf6 f1Q 77.Ke5 Qg6 78.Kd5 Qb5) 73.Kf6 (73.Kd6 f3 74.Kc7 f2 75.Kb6 f1Q 76.Kc7 Qff4 77.Kd7 Qf7 78.Kd6 Qfe7) 73...f3 74.Kf7 (74.Kg5 f2 75.Kh5 Qh7 76.Kg5 f1Q 77.Kg4 Qf4) 74...f2 75.Kg7 f1Q 76.Kh6 Qff5 (76...Qf6 77.Kh5 Qef3) 77.Kg7 Qee6 (77...Qg6 78.Kf8 Qb4) 78.Kh8 Qff6 79.Kh7 Qff7 (79...Qef7) 80.Kh8 Qee8 (80...Qe5) 0-1. BeepBeepImAJeep (2775) - nihalsarin2004 (2860), lichess.org, 2019.

6.c4 c6 7.Nf3 0-0 8.Be2 e5 9.d4 e4 10.Nfd2 Re8 11.0-0 Nf8 12.Nc3 Ng6 13.Re1 h6 14.Nf1 (14.Ba3=) 14...h5 (14...cb5 15.c5 (worse 15.cd5 b4 16.Nb5 Ne7-/+; 15.cb5?! Be6=) 15...b4 16.Na2=) 15.Rc1 (15.c5!? Be7 16.Bh5 Nh5 17.Qh5+/-) 15...h4 16.bc6 bc6 17.cd5 cd5 18.Qb3 (18.h3 a6=) 18...Be6 (18...Rb8 19.Qa2=+) 19.Ba3 Rb8 20.Qa2 Bc7 (20...Ba3 21.Qa3 h3 22.gh3 Bh3 23.Rc2=+) 21.Nb5= Ba5 22.Red1 a6 23.Nc3 (23.Na7 Qb6 24.Bc5 Qb2 25.Qb2 Rb2 26.Ba6 Ng4=) 23...h3 24.g3 (worse 24.Ba6 Bc3 25.Rc3 Qa5-+) 24...Bc3 25.Rc3 Ng4 (better 25...Qd7=) 26.Ba6?? (26.Rc6 Qg5 27.Rdc1 Qf5+=) 26...Qf6?? (better 26...Qa5 27.Rc6 Qa4 28.Re6 Re6-+ (28...Qd1 29.Re8 Re8 30.Be2+/-)) 27.Qe2= Qg5 (better 27...Nh6!? 28.Rc6 Bg4 29.Rf6 Be2 30.Be2 gf6+=) 28.Bd6+/- Nh6? (better 28...Nf6 29.Bb8 Bg4+/-) 29.Bb8+- Rb8 30.Rdc1 Bg4 31.Rc8! Rc8 (31...Bc8 32.Rc8 Decoy) 32.Rc8 Kh7 33.Qc2 Qf6 (better 33...Bc8 34.Bc8 Qh5+/-) 34.Rc6?? (better 34.Be2 Bc8 35.Qc8+-) 34...Qf3 35.Qe4 Qg2 (35...de4 36.Rg6 Qg2) 36.Qg2+- hg2 37.Kg2 Bf5 (37...Bd7 38.Rc7 Ba4 39.Bb7+-) 38.f3 (better 38.a5 Ng8+-) 38...Be4 (38...Bd7 39.Rc5 Ba4 40.Rd5 Bb3+-) 39.fe4 de4 40.Bb7 f5 41.Rg6! Kg6 42.h3 (better 42.a5 Nf7 43.a6+-) 42...Ng4 (42...Nf7+-) 43.hg4 fg4 44.Be4 Kg5 45.Bd3 Kh5 46.e4 g5 47.Ne3 Kh6 48.Ng4 Kh5 49.Ne3 Kh6 50.g4 Kg6 51.Kf3 Kh6 52.e5 (52.a5 Kg7 53.Nf5 Kf8 54.a6 Kg8 55.a7 Kh8 56.a8Q Kh7 57.Qb7 Kg6 58.Qg7) 52...Kg7 53.Ke4 (53.a5 Kf8 54.a6 Kg7 55.a7 Kg8 56.a8Q Kf7 57.Bg6 Kg6 58.Qg8 Kh6 59.Nf5) 53...Kh6 54.Kf5 (54.Nf5 Kg6 55.e6 Kf6 56.Bc4 Kg6 57.e7 Kf6 58.a5 Kg6 59.e8Q Kf6 60.Qe6) 54...Kg7 (54...Kh7 55.Kf6 Kh6 56.Nf5 Kh7 57.Nh4 Kh8 58.e6 gh4 59.e7 Kg8 60.e8Q) 55.Kg5 (55.a5 Kh7 56.Kf6 Kh6 57.Nf5 Kh7 58.Nh4 Kh8 59.a6 gh4 60.a7 Kg8 61.a8Q) 55...Kh8 (55...Kf7 56.Bc4 Ke7 57.Nf5 Kd7 58.e6 Kc8 59.e7 Kb8 60.e8Q Kb7 61.Qd7 Kb6 62.d5 Kc5 63.Qb5) 56.Kf5 (56.e6 Kg7 57.e7 Kf7 58.Nf5 Kg8 59.Kg6 Kh8 60.e8Q) 56...Kg7 (56...Kg8 57.Kf6 Kf8 58.Bg6 Kg8 59.e6 Kh8 60.e7 Kg8 61.e8Q) 57.g5 Kh8 (57...Kf8 58.Nd5 Kg7 59.e6 Kf8 60.e7 Ke8 61.Bb5 Kf7 62.e8Q Kg7 63.Ne7 Kh7 64.Qg8) 58.g6 (58.Kf6 Kg8 59.e6 Kh8 60.e7 Kg8 61.e8Q) 58...Kg7 (58...Kg8 59.Kf6 Kf8 60.g7 Ke8 61.g8Q Kd7 62.Qb8 Kc6 63.Bb5) 59.e6 Kh8 (59...Kf8 60.Kf6 Ke8 61.g7 Kd8 62.g8Q Kc7 63.Qg7 Kb8 64.Ba6 Ka8 65.Qb7) 60.d5 (60.d5 Kg7 61.e7 Kh6 62.e8Q Kg7 63.Qf7 Kh6 64.Qh7; 60.Kf6 Kg8 61.e7 Kh8 62.e8Q) 1-0. BeepBeepImAJeep (2675) - Elda64 (2555), lichess.org, 2016.

6.c4 e5 7.cd5 Nd5 8.Nf3 0-0 9.Be2 Re8 10.0-0 Nf8 (10...e4 11.Nd4=+) 11.d4= e4 12.Nfd2 (12.Ne5 Qh4=) 12...f5 (12...Qg5!? 13.Re1 Ng6=+) 13.Nc3 Nf6 (13...Qh4 14.g3 Nc3 15.Bc3=) 14.Nc4+= f4 15.Nd6 Qd6 16.Ba3 Qe6 17.ef4 Qf5 18.g3 e3 (18...Be6 19.Re1+/-) 19.Bd3 (19.fe3 Re3 20.Qd2 Re8+-) 19...Qh3 20.fe3 (20.Qe2 ef2 21.Qf2 Bf5 22.Bc4 Be6+/-) 20...Re3 21.Qd2 (21.Rf2+/-) 21...Re8?? (better 21...Rg3 22.hg3 Qg3 23.Kh1 Qh3 24.Kg1 Qg3 25.Kh1 Qh3 26.Kg1 Qg3=) 22.Rae1+- Bg4 23.Bf8 Rf8 24.Re5 (24.Re7 Rac8+-) 24...Rad8 25.Be2 White prepares d5 (25.Bc4!? Kh8 26.Re7+-) 25...Be2+/- 26.Re2 (worse 26.Ne2 Ng4 27.Qa2 Kh8=+) 26...Ng4 (26...Qd7!?+/-) 27.Rfe1 h6 (27...c5 28.Ne4 cd4 29.Ng5+-) 28.d5 (28.Re7 Rc8+-) 28...Kh8 (28...Rd7!? 29.Re7 Nf6 30.Qa2+-) 29.Re7 c6 30.Qg2 Qg2 31.Kg2 cd5 32.Rb7 d4 33.Ne4 (33.Nd1!? a5 34.ba6 Kh7+-) 33...d3 (33...Rfe8 34.Ra7 d3=) 34.Nd2 (34.Ra7 Rfe8 35.Rb1 Re4=+) 34...Ne3?? (34...Rfe8 35.Ree7 Ra8+-) 35.Re3 1-0. BeepBeepImAJeep (2620) - Silent_Bluntman (2340), lichess.org, 2016.

6.c4 Qe7 7.Nf3 c6 8.Be2 e5 9.0-0 e4 10.Nd4 Nc5?? 11.bc6= bc6 12.cd5 (12.Nc6 Bh2 13.Kh2 Qc7 14.Kg1 Qc6 15.cd5 Qd5+=) 12...cd5 13.f4 (13.Bb5 Kf8=) 13...0-0 14.Nc3 Bd7 15.Ncb5 a6 16.Nd6 Qd6 17.Rc1 (17.Ba3 Qb6 18.Rb1 Qa5+=) 17...Rfc8 (better 17...Na4!? 18.Ba1 Rfb8-/+) 18.Ba3 Qb6 19.Rb1 Qa7 (19...Qd8!?=+) 20.a5= Nd3 (20...Nb7!? 21.Bb4 Rab8=) 21.Bd3 ed3 22.Rb6 (22.Qb3!?+=) 22...Ne4= 23.f5 (23.Bd6 Rc4=) 23...Bb5 (better 23...Rab8!? 24.f6 Rb6 (24...Nf6? 25.Rbf6 gf6 26.Qf3+-) 25.ab6 Qb6 26.fg7 Qg6=+) 24.f6+= g6 25.Nb5 ab5 26.Rb5 (26.Bb4 Rc4 27.Qb3 d4=) 26...Qd7 (better 26...d4!? 27.Qg4 de3 28.Qe4 e2 29.Rb6 Qa5-+) 27.Rb3+= Ra5 28.Rd3 Qb5 29.Rb3 Qa6 30.Bb2 Rb5 (30...Ra2 31.Bc3=) 31.Rb5 (31.Ra3!? Qd6 32.Ra2+/-) 31...Qb5+= 32.Bd4 Qd3 33.h3 Qd2 34.Qd2 Nd2 35.Rd1 Nb3 (35...Ne4 36.Be5 Rd8 37.Rc1=) 36.Be5 Rd8 37.Kf2 Nc5 38.Kf3 h6 39.Rd4 Ne6 40.Rd3 g5 41.Bd4 (41.Kg4 Rd7+=) 41...Kh7 (41...Nd4 42.Rd4 Kh7 43.e4 de4 44.Ke4=+) 42.g4 (42.Bb2 Nc5 43.Ra3 Ne4=) 42...Kg6 (42...Nd4 43.ed4 Rd6 44.Ra3-/+) 43.e4? (better 43.Be5=) 43...de4-+ 44.Ke4 Rd4 45.Rd4 Nd4 46.Kd4 Kf6 47.Kd5 Kg6 48.Ke5 h5 (48...f6 49.Ke4-+) 49.Ke4 (better 49.gh5 Kh5 50.Kf5=) 49...hg4 50.hg4 Kf6 51.Kd5 Kg6?? (better 51...Ke7 52.Ke5 f6 53.Kd5 Kd7-+) 52.Ke5 (52.Ke4 f6-/+) 52...f6 (better 52...Kg7!?-/+) 53.Ke6= Kg7 54.Ke7 Kg6 55.Ke6 Kg7 56.Ke7 Kg6 57.Ke6 ½-½. BeepBeepImAJeep (2600) - DwightHoward (2635), lichess.org, 2015.

6.c4 Qe7 7.Nf3 c6 8.Be2 e5 9.0-0 e4 10.Nd4 Qe5 11.g3 c5-+.

6.c4 Qe7 7.Nf3 c6 8.Be2 e5 9.0-0 e4 10.Nd4 Ne5?? 11.cd5 cd5 12.f4 ef3 13.Nf3 Nf3 14.Bf3 Be6 15.Nc3 Exerts pressure on the isolated pawn 15...h6 16.Ne2 Ne4 17.Nd4 (17.Bg7 Rg8 18.Bd4+= (worse 18.Bh6 Bh2 19.Kh2 Qh4 20.Kg1 Qh6=)) 17...Rc8? (17...Qh4 18.g3 Ng3 19.Ne6 (19.hg3?? Qg3 20.Bg2 Qh2 21.Kf2 Bg3 22.Ke2 Qg2 23.Kd3 Qe4 24.Kc3 Rc8 25.Kb3 Bg4-+) 19...fe6 20.Qe1=+ (20.hg3 Qg3 21.Bg2 Qh2 22.Kf2 0-0 23.Qf3 Rf3 24.Ke2 Qg2 25.Kd3 Qg6 26.Ke2 Re3 27.Kd1 Qg4 28.Kc1 Rc8 29.Bc3 Rcc3 30.dc3 Rc3 31.Kd2 Qd4 32.Ke1 Bg3 33.Rf2 Qf2 34.Kd1 Qe1)) 18.Be4 (better 18.Ne6!? fe6 19.Be4 de4 20.Qg4+-) 18...de4= 19.Ne6 Qe6 20.Rc1 0-0 21.Qh5 Rc1 22.Rc1 Be7 (22...a6 23.Bd4=+) 23.Qe5 Qe5 24.Be5 Rd8 (24...f6 25.Bd4 Bb4 26.Ba7 Bd2 27.Rc4=) 25.Bd4 (25.Rc7 Bd6 26.Bd6 Rd6 27.Rb7 a6+/-) 25...b6 (25...Bd6!?+=) 26.Rc7+/- Bb4 27.Ra7 Ba5 28.Rb7 Rd6 29.Kf2 Rg6 30.g3 Re6 31.Ke2 Rd6 (31...f6 32.d3+-) 32.d3 (32.Re7!? Kf8 33.Re4 Rd7+-) 32...ed3 33.Kd3 Re6 34.Rb8 Kh7 35.Rb7 Kg6?? (35...Kg8 36.Rc7 Re8+-) 36.h4 (36.Rc7 f6+-) 36...h5 37.Ke2 (37.Rc7 f6+-) 37...f6+/- 38.Kf3 Rd6 (38...Kh6!? 39.e4+-) 39.g4 hg4 40.Kg4 Re6 41.h5 Kh6 42.Kf5 (42.Rc7 Re8+-) 42...Rd6 43.Rb8 Rd5 (43...Kh7 44.Kg4+-) 44.Ke6 Rh5 45.Bb6 Kg6?? (45...Bb6 46.Rb6 Re5 47.Kd7 Re3+-) 46.Ba5 Re5 47.Kd6 Re3 48.Bb6 Rd3 49.Kc6 f5 50.a5 f4 51.a6 f3 (51...Ra3 52.Bc5 Ra1 53.a7+-) 52.Rf8 Ra3 53.a7 Kg5 54.a8Q Ra8 55.Ra8 Kg4 56.Rf8 g5 57.Bc5 Kg3 (57...Kh3 58.Rf3 Kg4 59.Rf1 Kh4 60.b6 Kh3 61.b7 Kg3 62.b8Q Kg4 63.Qb4 Kh5 64.Qe4 g4 65.Rh1 Kg5 66.Be7) 58.b6 g4 (58...Kh3 59.b7 Kh2 60.b8Q Kh3 61.Bf2 Kg4 62.Qg3 Kh5 63.Rg8 g4 64.Qh4) 59.b7 Kg2 (59...f2 60.b8Q Kh3 61.Qb3 g3 62.Qf3 Kh4 63.Be7 Kh3 64.Rh8) 60.b8Q g3 (60...f2 61.Rf2 Kh3 62.Rh2) 61.Rg8 Kf1 62.Qg3 f2 (62...Ke2 63.Rd8 f2 64.Qf2) 63.Qf2 1-0. BeepBeepImAJeep (2550) - DwightHoward (2680), lichess.org, 2015.

5.c4 dc4 6.e3 c6 7.Bc4 cb5 8.ab5 Qc7 9.Be2 (9.d3 Nbd7=) 9...Bd7 (9...e5 10.b6 Qb6 11.Be5=) 10.Nf3 b6 (10...0-0 11.0-0=) 11.Nc3 Bb4 (11...0-0 12.0-0+=) 12.0-0 Qd6 (12...0-0 13.Qb3 Ba5 14.Rfc1+-) 13.Nd4 (better 13.Qb1 Bc3 14.Bc3+-) 13...Qe7?? (better 13...e5 14.Nc2 Bc3 15.Bc3 Be6+/-) 14.Bf3+- Bc3 (14...e5 15.Ba8 ed4 16.ed4+-) 15.Bc3 (better 15.dc3 e5 16.Ba8 ed4 17.Ba3+-) 15...Nd5 16.Qb3 a6 (16...Qc5 17.Rfc1 a6 18.Nf5 Nc3 19.Ng7 (19.Rc3?! Qf5 20.Ba8 Qb5+-; 19.Qc3?! Qc3 20.Rc3 Ra7 21.Ng7 Ke7+/-; 19.dc3?! Ra7 20.Ng7 Kf8+=) 19...Kf8 20.Rc3 (20.dc3?! Ra7 21.Nh5 Bb5+/-; 20.Qc3?! Qc3 21.Rc3 Ra7+/-) 20...Qb5 21.Qb5 (21.Ba8?! Qb3 22.Rb3 Kg7+-) 21...ab5 22.Ne6 Be6 23.Ra8+-) 17.Bd5 ed5 18.Qd5 Ra7 19.Qb3 (better 19.Bb4! Qf6+-) 19...0-0? (better 19...a5+-) 20.Bb4 (20.Bb4 Qg5 21.f4+-) 1-0. BeepBeepImAJeep (2655) - Sasqwatch (2465), lichess.org, 2015.

5.c4 c6 6.e3 cb5 7.cb5 0-0 8.Nf3 Nbd7 9.Be2 Re8 10.0-0 Nf8 11.d4 Ng6 12.Nbd2 b6 13.Ne5 Bb7 (13...Ne5 14.de5 Nd7 15.Bd4+=) 14.Ndf3 Rc8 15.Rc1 (15.Ng6 hg6 16.Qd3 Ne4+=) 15...Ne4 (15...Ne5!? 16.Ne5 Rc1 17.Bc1 Ne4=) 16.Rc8+/- Qc8 17.Qa1 (17.Ng6 hg6 18.Qd3 Qc7+/-) 17...Ne5= 18.Ne5 Bf6 19.Rc1 Qb8 20.Nc6 Bc6 21.Rc6 Rc8 22.Qc1 Nd6 23.Ba3 Be7 24.Bd6 Rc6 25.Qc6 (25.Bb8? Rc1 26.Bf1 Bd8-+; 25.bc6?! Bd6 (25...Qd6?? 26.c7+-) 26.g3 g6=) 25...Bd6 26.g3 g6 27.f4 Qc7 28.Qc7 Bc7 29.Kf2 Kf8 30.Kf3 Ke7 31.Bd3 Bd6 32.h3 f6 33.g4 h6 (33...e5 34.fe5 fe5 35.e4+=) 34.e4 (34.Bg6!? Bb4 35.h4+/-) 34...g5 35.f5 ef5 36.gf5 Bb4 (36...Bh2 37.Kf2+=) 37.ed5 (37.Ke3 Bd6+=) 37...Kd6+= 38.Be4 Bc3 39.Kg4 Bd4 40.Kh5 Be5 (40...Ke5!? 41.Bf3 Kf5 42.Kh6 Bc5=) 41.Kh6+= Kc5 42.Kg6 Kd6 43.Kf7 Bd4 44.Kg6 Be5 45.Kh5 Bd4 46.h4 (better 46.Bf3+=) 46...Be5?? (better 46...gh4 47.Kh4 Ke5=) 47.hg5+- fg5 48.Kg5 Ke7 49.Kg6 Bf6 (49...Bd4+-) 50.d6! (50.d6 Kd6 51.Kf6+-) 1-0. BeepBeepImAJeep (2650) - TheFord (2395), lichess.org, 2019.

5.c4 c6 6.e3 dc4 7.Nf3 cb5 8.ab5 b6 (8...Nbd7 9.Bc4 Nb6 10.Be2=) 9.Bc4+= Bb7 10.Be2 (10.0-0 Bd6+=) 10...Nbd7 (10...0-0 11.0-0=) 11.0-0+= Nc5 12.d4 Ncd7 13.Nbd2 0-0 14.Nc4 Nd5 15.Nfe5 Ne5 16.Ne5 Bd6 17.Rc1 Qe7 18.Nc6 Bc6 19.bc6 Bc7 (19...Qc7 20.h3=) 20.Bf3 Rac8 (20...Qb4 21.Ba1+=) 21.g3 Nf6 22.Qb3 Rfd8 23.Ba3 (23.Rfd1 a6+/-) 23...Qe8 24.Qa4 Ra8 25.Qa6 Rdc8 (25...Rdb8 26.Rfd1+/-) 26.Rfd1 Nd5 (better 26...Qd8+/-) 27.e4+- Nf6 28.d5 ed5 (28...Be5 29.Qb5 ed5 30.ed5+-) 29.ed5 Qe5 (29...Ne4 30.Re1 f5 31.d6 Bd6 32.Be4 fe4 33.Qc4 (33.Bd6?! Rc6 34.Qa2 Kh8 35.Rc6 Qc6+-) 33...Qf7 34.Bd6 Qc4 35.Rc4+-) 30.d6 Bd8 (30...Qf5 31.dc7 h6 32.Rd8 Kh7+-) 31.c7 Ne4 (31...Qf5 32.Ba8 (32.cd8N Qf3 33.Nb7 Ng4 34.Rc8 Rc8+-) 32...Ra8 33.c8Q Rc8 34.Rc8+-) 32.cd8Q (better 32.Be4 Qe4 33.Re1 Qe1 34.Re1 Bc7+-) 32...Rd8 33.Re1 (better 33.Qc4 Ng3 34.fg3+-) 33...Qd4 (33...f5+-) 34.Re4 Qd6 (34...Qf6 35.Rf4 Qf4 36.gf4 Rab8 37.Qa7 h6+-) 35.Bd6 Rd6 36.Qa7! Rad8 (36...Ra7 37.Re8 Mate attack) 37.Rc7 (37.Qe7 g6 38.Rc7 Rd1 39.Bd1 Rd1 40.Kg2 Rg1 41.Kg1 Kg7 42.Qe5 Kh6 43.Rh4) 37...g6 38.Rf7 Rd1 (38...R6d7 39.Rd7 Rc8 40.Qa2 Kh8 41.Qb2 Kg8 42.Qg7) 39.Bd1 Rd1 40.Kg2 Rd7 (40...Rd8 41.Rg7 Kh8 42.Rh7 Kg8 43.Qf7) 41.Re8 (41.Rd7 b5 42.Re8) 41...Kf7 42.Qd7 Kf6 43.Qe7 Kf5 44.Qe5 Kg4 45.h3 1-0. BeepBeepImAJeep (2655) - truwa (1950), lichess.org, 2017.

5.e3 0-0 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.a4).

5.e3 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Be7).

5.g4 h6 6.Nf3 0-0 7.Rg1 Nbd7 8.h4 e5 9.g5 e4 (better 9...hg5 10.hg5 Ne4=+) 10.gf6+- Bf6 11.Nd4 Bd4?? (11...Ne5 12.e3 Re8=) 12.Bd4+- Qh4 (12...Nf6+-) 13.Rg7 Kh8 14.Rg4 (14.Rg4 Qf6 15.Bf6 Nf6 16.Rh4+-) 1–0. Lance5500 (2470) – ioxod, lichess.org, 2019.

5.e3 Bg7 6.c4 0-0 7.Nf3 dc4 8.Bc4 Nd5 9.d4 c6 10.0-0 cb5 11.ab5 Nd7 12.Be2 N7b6 13.Nbd2 Bd7 14.Rc1 (14.Ne4 Qc7+/-) 14...Rc8 15.Ne4 Rc1 16.Qc1 Qe7? (better 16...Qb8+=) 17.Ba3+- Nb4 (better 17...Qe8 18.Bf8 Bf8+-) 18.Qd2 N6d5 19.Rb1 a5 (19...Bb5 20.Bb5 (20.Rb4?! Be2 21.Rb3 Qc7 22.Qe2 Rd8+-) 20...a5 21.Nc3+-) 20.ba6! ba6 (20...Na6 21.Nc5 Double attack (21.Be7 Pinning; 21.Be7 Deflection; 21.Nc5 Decoy; 21.Rb7 Clearance); 20...ba6 21.Rb4 Decoy) 21.Bb4 (21.Rb4 Nb4 22.Bb4 Qd8 23.Bf8 Bf8 24.Ba6 Bc6+-) 21...Rb8 (21...Nb4 22.Rb4 Bc6+-) 22.Be7 Rb1 23.Bf1 (23.Ne1 Ne7 24.Ba6 Bc6+-) 23...Bb5 24.Ne1 Bf1 (24...Ne7 25.Nc3 Ra1 26.Nb5 ab5 27.Nc2+-) 25.Kf1 (better 25.Qa5 Rb8 26.Bd6 Ra8 27.Kf1 h6+-) 25...Ne7 26.Nc3 (better 26.Qa5!? Nd5+-) 26...Rb3 27.Qc2 (27.Qc2 Rb4 28.Ne4+-) 1-0. BeepBeepImAJeep (2775) - AhmetEfekanAlaz (2455), lichess.org, 2020.

5.e3 Bg7 6.c4 0-0 7.Nf3 c6 8.Be2 cb5 9.cb5 a6 10.0-0 ab5 11.ab5 Ra1 12.Ba1 Qa5 13.Bc3 Qb6 14.d4 Bd7 The isolani on b5 becomes a target 15.Nbd2 Bb5? (better 15...Rc8 16.Qb3 Ne8+=) 16.Qb3+- Nbd7 (16...Rc8 17.Rc1+-) 17.Qb5 (17.Bb5 Rc8 18.Rc1 Qd8+-) 17...Qc7 (17...Qb5 18.Bb5 Rc8 19.Bb4+-) 18.Ba5 Qc8 (18...b6 19.Bb4 Ra8 20.Nb3+-) 19.Bb4 Rd8 20.Nb3 Nh5 (20...Qc2 21.Na5 h6+-) 21.Rc1 Qb8 22.Nc5 (better 22.Be7 b6+-) 22...Nc5 23.Bc5 e5 (23...Nf6+-) 24.de5 Be5 (24...Qc8 25.Rd1+-) 25.Ne5 (better 25.Be7!? Re8 26.Ne5 Re7+-) 25...Qe5 26.Bd4 Qe6 27.Bh5 gh5 28.Qb6 (better 28.Qb7 Qf5 29.Qb6+-) 28...Rd6 (28...Qb6 29.Bb6 Rd7 30.Bd4+-) 29.Qd6! f6 (29...Qd6 30.Rc8 Decoy) 30.Qe6 (30.Qe6 Kg7 31.Qf6 Kg8 32.Rc8) 1-0. BeepBeepImAJeep (2655) - indian_heat (2055), lichess.org, 2015.

4.a4 c6 5.e3 ab5 6.ab5 Ra1 7.Ba1 Bg4 8.Be2 Be2 9.Ne2 cb5 10.Bf6 gf6 11.0-0 b4 12.c3 e6 13.f4 Nc6 14.Qa4 Qa5 15.Qb3 Be7 16.Nd4 f5 17.Qb2 Nd4 18.cd4 Kd7 19.Rc1 Ra8 20.Qc2 1–0. AsceticKingK9 – Snoopy85, ChessWorld.net, 2011.

4.a4 Bf5 5.Nf3 (5.e3 e6 6.Nf3 Bd6 7.Be2 ab5 8.ab5 Ra1 9.Ba1=; 5.ba6 Na6 6.Nf3 Nb4 7.d3 e6 8.Nh4 Bg4 9.h3+=) 5...e6 6.e3 Bd6 7.Be2 Bg4 8.0-0 0-0 9.Nc3 =.

4.a4 Bg4 5.h3 (5.Nf3 e6 6.Ne5 Bh5 7.c4 dc4 8.Qc1 Nbd7 9.Nc4+=; 5.f3 Bf5 6.e3 e6 7.ba6 Na6 8.g4 Bg6 9.h4+=) 5...Bh5 6.Nf3 e6 7.e3 Bd6 8.Be2 0-0 9.0-0 +=.

4.a4 g5 5.Nf3 (5.e3 Bg7 6.Nf3 g4 7.Ne5 Qd6 8.Nd3 Bf5 9.Be5=) 5...g4 6.Ne5 Bh6 (6...Bg7 7.e3 Qd6 8.ba6 Na6 9.d4=) 7.e3 ab5 (7...Bg7 8.Be2 Nfd7 9.Nd7=) 8.ab5 Ra1 9.Ba1 c6 10.Nc3 cb5 11.Bb5 Kf8 12.Bd3 Na6 13.Be2 Rg8 14.0-0 Rg5 15.Nb5 Re5 16.Be5 Nd7 17.Bd4 Qa5 18.Na7 Qc7 19.Bg4 Qb8 20.Qa1 Qa7 21.Ba7 1–0. pierre – opponent, internet, 2008.

4.ba6 A) 4...ba6 5.Bf6 (5.e3 Nbd7 6.Nf3 Rb8 7.Bf6 Nf6 8.c4 e6 9.Ne5+=; 5.Nf3 Nbd7 6.c4 e6 7.Nc3 Bd6 8.e3 Rb8 9.Rb1+=) 5...ef6 6.e3 Bd6 7.c4 dc4 8.Bc4 Nd7 9.d4=; B) 4...Na6 5.Nf3 (5.e3 Bg4 6.Be2 Be2 7.Qe2 c6 8.Bf6 ef6 9.d4+=) 5...e6 6.e3 Bd6 7.Be2 0-0 8.0-0 Nc5 9.Be5+=; C) 4...b6 5.Nf3 (5.e3 e6 6.a7 Ra7 7.Qf3 Na6 8.Bf6 Qf6 9.Qf6+=) 5...Ba6 6.d3 e6 7.e3 Bd6 8.Be2 0-0 9.0-0+=.

4.e3 Bg4 5.Be2 (5.f3 Bd7 6.ba6 Na6 7.Bf6 ef6 8.Ba6 Ra6 9.Ne2+=; 5.Nf3 e6 6.Nc3 Bd6 7.h3 Bh5 8.Be2 0-0 9.0-0+=) 5...Be2 6.Qe2 e6 7.Nf3 Nbd7 8.a4 Bd6 9.0-0 +=.

6.Ba1 c5 7.e3 Bd7 8.c4 e6 9.Nf3 Be7 10.Be2 0-0 11.0-0 dc4 12.Bc4 Nd5 13.Ne5 Be8 14.f4 (14.Qg4 Bf6=) 14...Bf6 (14...f6 15.Ng4=) 15.Na3 b6 (15...Nd7 16.Qc2=) 16.Kh1 (16.e4 Nc7+=) 16...Nd7 17.Bd5 Be5 18.Be6 (18.fe5!? ed5 19.Qf3+=) 18...Ba1=+ 19.Bf7? (better 19.Bd7 Qd7 20.Qa1 Qd2 21.f5=+) 19...Bf7-+ (19...Kf7?! 20.Qb3 Kg6 21.Ra1-/+) 20.Qa1 Nf6 21.Nc4?? (21.d4-+) 21…Bc4 (21...Bc4 22.Rc1 Qd3-+) 0–1. KLINGON09 (1835) – Kingofimpossoble (1770), lichess.org, 2019.

6.Ba1 c5 7.e3 Nbd7 8.f4 e6 9.Nf3 b6 10.Be2 Bb7 11.0-0 Be7 12.c4 0-0 13.Nc3 Ne4 (13...Qc7 14.Bb2+=) 14.Qc2 Nc3 15.Bc3 dc4 16.Bc4 Bf3 17.Rf3 Bf6 18.f5 (18.Rh3 h6 19.Be2=) 18...ef5 (18...Bc3 19.Qc3 (worse is 19.dc3 Ne5 20.Rf4 ef5-/+) 19...ef5 20.Rf5=) 19.Rf5 (better is 19.Qf5!? Qc7 20.Qe4+= (20.Bf6?! Nf6 21.g4 Ne8=)) 19...Qe7 20.Bd5 Bc3 21.Qc3 (worse is 21.dc3 Qe3 22.Qf2 Qc3 23.Bf7 Kh8-/+) 21...Nf6 22.Bc6 Rd8 23.Kf1 (better is 23.Rf4!?=) 23...Qd6 24.d4 (24.Ke2 Qh2 25.Qe5 Qe5 26.Re5 Kf8+=) 24...cd4 (better is 24...Qh2!? 25.dc5 Qh1 26.Kf2 Qh4 27.Ke2 Qg4 28.Rf3 Qg2 29.Rf2 Qg4 30.Rf3 Qa4-+) 25.Qd4+= Qc7 (25...Qd4 26.ed4 Rd4 27.Rf3+=) 26.Qf4 Qe7 27.h3 h6 28.Kg1 Qd6 (28...g6!? 29.Qg3 Rd3+=) 29.Qd6= Rd6 ½–½. Matveenko,Yury (2140) – Ajrapetian,Nikita (2090), Voronezh Region Senior Championship, 2009.

6.Ba1 Bd7 7.e3 c6 8.Nf3 cb5 9.Ne5 (9.Bf6!? gf6 10.Nc3=) 9...Bc6 (9...b4 10.g3-/+) 10.Bd3 e6 11.Nc3 Attacks the isolani on b5 11...b4 12.Nb5 (12.Ne2 Bd6=+) 12...Qa5 (12...Nbd7 13.Nd7 Nd7 14.0-0=+) 13.Nd4= Bd6 14.f4 0-0 15.0-0 Rc8 16.Qf3 Na6 (16...Nbd7 17.Qg3 Be5 18.fe5=) 17.Qg3 (17.Ndc6 bc6 18.f5 Qc7 19.Ba6 Ra8+-) 17...Nc5 18.Ndc6 (18.Nb3 Nb3 19.Nc6 Qa1 (19...bc6? 20.Bf6 g6 21.cb3+-) 20.Ra1 Na1+-) 18...bc6 19.Bh7 (19.Nc6 Rc6 20.Bf6 g6+=) 19...Kh7= (worse 19...Nh7 20.Nc6 Qa1 21.Ra1 Rc6 22.Qe1+-) 20.Nf7 Nce4?? (20...Be7!?=) 21.Ng5+= Kg8? (21...Ng5 22.Qh4 Kg6 23.fg5 Nh5+-) 22.Ne4+- de4 1–0. GuestHHWR – GuestPPHD, freechess.org, 2020.

6.Ba1 Bd7 7.e3 c6 8.Nf3 e6 9.Bb2 (9.Ne5 Be7=) 9...cb5 10.Ne5 b4 11.d4 (11.Bd3 Bd6=+) 11...Qa5 (11...Bd6 12.Bd3-/+) 12.Nd2=+ Qa2 13.Qc1 Bd6 14.Bd3 0-0 15.0-0 Bc6 16.Qa1 Qa1 17.Ra1 Nbd7 18.f4 Be5 (18...Nb6 19.Ra7=+) 19.de5 Ng4 (19...Ne4 20.Be4 de4 21.Nc4=) 20.Bd4 f6 21.ef6 (21.Nf3 fe5 22.fe5 g6+=) 21...Ngf6 (21...gf6!? 22.h3 Nh6=) 22.Rb1+= Ra8 23.Rb4 Ra2 24.h3 Kf7 25.Kf1 h5 26.Nf3 Ra4 27.Ng5 Ke7 28.Rb2 Ra1 29.Kf2 Rh1 30.Ra2 Kd6 31.Kg3 e5 (31...Ke7!?+-) 32.Nf7+- Ke6 33.Ne5 Ne5 34.Be5 Rg1 (34...g5 35.Bd4 Ne4 36.Kf3+-) 35.Bd4 h4 36.Kf2 Rd1 37.Ke2 Rg1 38.Kf3 Be8 39.f5 Kd6 40.Rb2 Bc6 41.Rb4 Re1 42.Bc3 d4 (42...Rh1 43.Bb2+-) 43.Kf2 Re3 (43...dc3 44.Ke1 Bg2 45.Rh4 Bd5+-) 44.Rd4 Nd5 45.Rd5! (45.Rd5 Bd5 46.Ke3 Bg2 47.Bg7 Bh3 48.Bf6+-) 1–0. onur604 (2315) – fireworkshere (1955), lichess.org, 2020.

6.Ba1 Bd7 7.e3 Bg4 8.Nf3 Nbd7 9.c4 Bf3 (9...e5 10.h3 Bf3 11.gf3 dc4 12.Bc4=+) 10.gf3 (10.Qf3!? e6 11.Be2=) 10...e6=+ 11.Be2 dc4 12.Bc4 Bd6 13.f4 e5 (13...Nb6 14.Bb3=+) 14.fe5= Be5 15.d4 Bd6 16.Nd2 Qe7 (16...Nb6 17.Bd3=) 17.0-0 (17.Qf3!?+/-) 17...Nb6= 18.Be2 (18.Bd3 0-0=) 18...Ne4 (18...Qe6 19.Qb3=+) 19.Bf3?? (better 19.Ne4 Qe4 20.Qd3=) 19…Qh4 (19...Qh4 20.h3 Qh3 21.Re1 Qh2 22.Kf1 Qf2) 0-1. BeepBeepImAJeep (2745) - caissaisabelle (2710), lichess.org, 2020.

6.Ba1 Nbd7 7.e3 e5 8.c4 dc4 9.Bc4 Bd6 10.Nf3 0-0 11.0-0 Qe7 12.Nc3 e4 13.Nd4 Ne5 14.Be2 Neg4 15.h3 Qe5 (better 15...Nh6=+) 16.f4+- ef3 17.Nf3 Qh5 18.Qe1 (better 18.b6!? cb6 19.Nb5+/- (19.hg4?! Ng4 20.g3 Qh3=)) 18...Ne5= 19.Nd4 Qg6 20.Qh4 Re8 21.Bd1 h5 (21...Nc4!? 22.Nd5 Bg3 (worse 22...Nd5 23.Bh5 Qf6 24.Rf6 Nf6 25.Nf3 Nh5 26.Qc4+/-; 22...Nd2 23.Rf6 Qb1 24.Qh5 gf6 25.Nf6 Kf8 26.Nh7 Ke7 27.Qg5 Kd7 28.Qf5 Qf5 29.Nf5=+) 23.Nf6 gf6 24.Qf6 Nd2=) 22.Bc2= Qh6 (22...Nd3 23.Nce2=) 23.Nf5 Bf5 24.Rf5 Ng6 25.Qc4 Re5 (25...Be5!?+=) 26.Rf6 gf6 27.Nd5 Qg5 28.Be5 fe5 (better 28...Ne5 29.Qf1 Kg7+/-) 29.Bg6 (better 29.Nc7 Qg3 30.Ne8+-) 29...Qg6= 30.Nc7 Bc7 (better 30...Qb1!? 31.Kf2 Qf5 32.Ke2 Qg6=) 31.Qc7+/- Qb1 32.Kf2 Qb5 33.Qd8 Kg7 34.Qg5 Kf8 35.Qh5 Qd5 (35...Qb2!? 36.Kf3 e4 37.Ke4 Qd2 38.Qh8 Ke7 39.Qe5 Kf8+/-) 36.d4!+- Qa2 (36...ed4 37.Qd5 Double attack (37.Qd5 Pinning; 37.Qd5 Deflection; 37.Qd5 Decoy)) 37.Qe2 ed4?? (better 37...Qd5 38.Qd3 ed4 39.ed4 f5+-) 38.Qa2 1-0. BeepBeepImAJeep - ChArLiE_WaFfLeS (2330), lichess.org, 2017.

6.Ba1 e5 7.e3 Bd6 8.c4 dc4 9.Bc4 0-0 10.Nf3 c6 (10...Nbd7!?=+) 11.Be5 cb5 (11...Be5 12.Ne5 cb5 13.Be2= (13.Bb5? Qd5-+)) 12.Bf6 (12.Bd6!? Qd6 13.Bb5+/-) 12...Qf6= 13.Bb5 Bg4 14.Be2 Nc6 15.Nc3 Bb4 16.Nd5 Qd6 17.Nb4 Qb4 18.0-0 Rd8 19.d4 Ne5?? (better 19...Be6+/-) 20.Ne5+- (worse 20.de5 Rd1 21.Rd1 Kf8=+) 20...Be2 21.Qe2 1-0. BeepBeepImAJeep (2590) - sideeffect1 (2100), lichess.org, 2017.

6.Ba1 e5 7.Be5 Bd6 8.Bb2 0-0 9.Nf3 Bg4 10.e3 c6 11.h3 Bf3 12.Qf3 cb5? (better 12...Nbd7+-) 13.Bf6+- gf6 (13...Qf6 14.Qf6 gf6 15.Nc3+-) 14.Nc3 (better 14.Bd3 Re8 15.Qh5+-) 14...Bb4 (14...d4 15.Bd3 Re8 16.Qg4 Kf8 17.Qd4 Nc6+-) 15.Qg4 Kh8 16.Qb4 Nc6 17.Qb5 d4 18.Ne4 de3 (18...Re8 19.Bd3+-) 19.fe3 f5 (19...Re8 20.Bd3+-) 20.Qf5 Nb4 (20...f6 21.Be2+-) 21.Bd3! Rg8 (21...Nd3 22.cd3 Passed pawn) 22.Qe5 Rg7 23.0-0 Nd3 24.cd3 Qd3 (24...Kg8 25.Nf6 Kh8+-) 25.Rf7 Qb1 26.Kh2 (26.Kh2 Qg1 27.Kg1 Kg8 28.Qg7; 26.Kf2 Qg1 27.Kg1 Kg8 28.Qg7) 1–0. GuestBYGP – GuestTPPiizzz, freechess.org, 2017.

6.Ba1 g6 7.e3 Bg7 8.c4 0-0 9.Nf3 dc4 10.Bc4 c6 11.0-0 cb5 12.Bb5 Qa5 13.Nc3 Bg4 14.d4 Nc6 15.h3 Bf3 (15...Bf5 16.Qe2+=) 16.Qf3 (worse 16.gf3 Qc7=) 16...e5 17.Bc6 bc6 18.de5 Qe5 19.Qc6 Qe7 20.Nb5 Ra8?? (better 20...Rd8+/-) 21.Qa8+- (21.Qa8 Qe8 22.Qe8 Ne8 23.e4+-) 1-0. BeepBeepImAJeep (2590) - akupenuhdosyah (2160), lichess.org, 2016.

6.Ba1 g6 7.e3 Bg7 8.c4 0-0 9.Nf3 c6 10.Be2 dc4 11.Bc4 cb5 12.Bb5 Qa5 13.Nc3 Ne4 (13...Bd7 14.Bd7 Nbd7 15.0-0=) 14.Ne4 Ba1 15.Be2 Bg7 16.0-0 b5 17.d4 Bb7 18.Nc5 Bf3 19.Bf3 Na6 20.Nd3 b4 21.Qa1 Qb6 (21...Qb5 22.Nf4 Nb8 23.Rb1+=) 22.Rb1 (22.Rc1!? Qb5 23.Be2+-) 22...Rb8+= 23.Bd1 e6 24.Bb3 (24.Qa2 Qd6+=) 24...Bf8 (24...Qb5 25.Rd1=) 25.Qa2 Nc7 26.Bc4 h5 (26...Bd6 27.Qb3=) 27.Ne5+= Kg7? (better 27...Ra8 28.Qe2 Bd6+=) 28.Nd7+- Qd6?? (28...Qb7 29.Nb8 Qb8+-) 29.Nb8 Nd5 30.Na6 (better 30.Bd5 Qb8 31.Bc6 Bd6+-) 30...Nc3 31.Qb3 Nb1 32.Qb1 Qc6 33.Bf1 (33.Qb3!? Qb7+-) 33...Qc3 34.Nc5! Bc5 35.dc5 Qc5 36.g3 h4 37.Be2 hg3 38.hg3 Qc3 39.Bd1 Qe1 40.Kg2 g5 41.Qb3 g4? (better 41...Qd2+-) 42.Bg4 f5 (42...Qc3 43.Bd1 Qd2 44.Bc2+-) 43.Bd1 (43.Bh5 Kf6 44.Qc4 Qd2 45.Qh4 Ke5+-) 43...Kf6 44.Qb2 e5 (44...Qc3 45.Qc3 bc3 46.Kf3+-) 45.Qe2 (45.Qa1 Qc3 46.Qa6 Ke7+-) 45...Qc3? (45...Qe2 46.Be2 b3 47.e4 fe4 48.Bd1+-) 46.Qc2 (better 46.Qa6 Ke7 47.Qg6+-) 46...Qe1 (46...e4 47.Qa4+-) 47.Be2 (47.Qc6 Ke7 48.Qc7 Kf6 49.Bb3 Qd1 50.Qf7 Kg5 51.Qg7 Kh5 52.Bd1) 47...b3 (47...Qc3 48.Qa4 Qc5+-) 48.Qc6 Kg7 49.Bd3 (49.Bh5 Qh1 50.Kh1 b2 51.Qg6 Kh8 52.Qf6 Kg8 53.Bf7 Kh7 54.Qg6 Kh8 55.Qg8) 49...b2 (49...e4 50.Qc7 Kh6 51.Qd6 Kh7 52.Qe7 Kg6+-) 50.Qd7 Kf6 51.Qf5 Ke7 52.Qe5 Kd8 (52...Kd7 53.Bb5 Kc8 54.Qb2+-) 53.Qd4 (53.Qd6 Ke8 54.Bg6) 53...Ke8 (53...Kc7 54.Qb2 Qa5 55.e4+-) 54.Qb2 (54.Bb5 Kf7 55.Qd5 Kf6 56.Qd8 Kg6 57.Be8 Kf5 58.g4 Ke6 59.Qd7 Kf6 60.Qf7 Ke5 61.Qf5 Kd6 62.Qd7 Ke5 63.f4 Ke4 64.Qd4) 54...Qa5+- 55.Qe2 Qd5 56.Qf3 (56.e4 Qa8 57.Qh5 Ke7 58.Qe5 Kf7 59.Bc4 Kg6 60.Qe6 Kg7 61.Qe7 Kh6 62.g4+-) 56...Qd3 57.e4 Qd4 (57...Qb5 58.Qf5 Qe2 59.g4+-) 58.Qf4 Ke7 59.f3 (59.g4 Qd1+-) 59...Ke6 (59...Qb2 60.Kh3+-) 60.Kh3 Qg1 61.Qg4 Ke5 (61...Ke7 62.Qg7 Ke8 63.e5+-) 62.Qh4 (62.Qg7 Ke6+-) 62...Qf1 63.Kg4 Qe2 (63...Ke6 64.Qh6 Kf7 65.f4+-) 64.Qh5 Kd4 65.Qf5 Ke3 (65...Kc3 66.Qc5 Kb3 67.Qd5 Ka3 68.e5+-) 66.Qf4 (better 66.Qc5 Kd2 67.Qa5 Ke3 68.Qb6 Kd3 69.Qb5 Ke3 70.Qe2 Ke2 71.f4+-) 66...Kd4 (66...Kf2 67.e5 Qc2 68.Kg5+-) 67.e5 Kd5 (67...Kc3+-) 68.Qe4! Qe4 69.fe4 Ke5 70.Kh5 (better 70.Kf3 Kd6+-) 70...Ke4 71.g4 Ke5 72.Kh6 Ke6 73.g5 Kf7 74.Kh7 Kf8 75.g6 Ke7 76.g7 (76.g7 Kd6 77.g8Q Ke5 78.Qg5 Ke4 79.Qe7 Kd4 80.Qd6 Ke3 81.Qd5 Ke2 82.Kg6 Kf2 83.Qd4 Kf3 84.Kf5 Kg2 85.Ke4 Kf1 86.Qb2 Ke1 87.Ke3 Kd1 88.Qd2) 1-0. BeepBeepImAJeep (2555) - Kidefence (2685), lichess.org, 2018.

7.c4 Qa5 (7...dc4 8.Qa4-/+) 8.Nc3? (8.Bf6 ef6 9.e3 dc4 10.Bc4 Bd6=) 8...e6 (better is 8...dc4!? 9.Qb1 cb5 10.Nb5 Bd7-/+) 9.e3=+ Bb4 10.Nf3 Ne4 11.Qc1 0-0 12.Qb2 Bc3 13.dc3 Nd7 (13...Rd8 14.cd5 cd5 15.Bd3=) 14.Bd3 (14.cd5!? cd5 15.Be2=) 14...Ndc5=+ 15.Bc2 dc4 16.0-0 (16.bc6!? Nd3 17.Bd3 cd3 18.cb7 Bb7 19.0-0-/+) 16...cb5-+ 17.Qb4 Qb4 (17...b6!?-+) 18.cb4-/+ Nd3 19.Bd3 cd3 20.Rd1 d2 (20...Rd8!? 21.Ne5 f6 22.Nd3 e5=+) 21.Nd2=+ Rd8 22.Bd4 Nd2 23.Rd2 e5 24.Bc3 Rd2 ½–½. De Visser,Arno – Rijnbergen, 1987.

7.e3 cb5 8.Bb5 Bd7 9.Bf6 Bb5 10.Bb2 e6 11.Nf3 f6 12.Nd4 Bc4? (better 12...Bd7=) 13.Ne6+- Qe7 (13...Qb6 14.Nf8 Qb2 15.Ne6+-) 14.Nf8+- Qf8 15.Ba3 Qf7 16.d3 Ba6 17.0-0 b5 (17...Nd7 18.Nc3+-) 18.Qg4 (18.Nc3 Nc6 19.Qb1 b4 20.Bb4 Qd7+-) 18...f5 (18...Qd7 19.Qh4+-) 19.Qd4 Qb7 (19...Nc6 20.Qc5 Qd7+-) 20.Qe5 Kd8 21.Nc3 b4 22.Qd6 Ke8 23.Qe5 (23.Bb4 Kf7+-) 23...Kd8 24.Qd6 Ke8 25.Nd5 ba3 (25...Kf7 26.Nb4 Re8+-) 26.Nc7 Kf7 (26...Qc7 27.Qc7 Nd7+-) 27.Qe6 Kf8 28.Qe8 1–0. DEFFM – GuestBHZS, freechess.org, 2018.

7.e3 Bd7 8.c4 cb5 9.cb5 Qa5 10.Nc3 (10.Be5 Qd8+=) 10...e6 11.Nf3 Bb4 12.Be2 (12.Bd3 0-0=) 12...0-0 13.0-0 Rc8 14.Qb3 Be8 (14...Ne4 15.Ne4 de4 16.Ng5 Bb5 17.Bb5 Qb5 18.Ne6=) 15.Rb1 Be7 16.h3 Nbd7 17.Bb2 Nc5 18.Qd1 Nce4 19.Ne4 Ne4 (worse 19...de4 20.Ng5+/-) 20.Bd4 Bf6 21.Rc1 (21.Bf6 Nf6 22.d4 Ne4=) 21...Qd8 (better 21...Rc1!? 22.Qc1 Bd4 (22...Bb5? 23.Bb5 h6 24.Qc8 Qd8 25.Qb7+-) 23.Nd4 Qd2 24.Qd2 Nd2-/+) 22.Rc8 Qc8 23.Qa1 (better 23.Bf6!? Nf6 24.d4=) 23...Bd4=+ 24.Qd4 (24.ed4 Nd6 25.Qa4=+) 24...Nd6 (better 24...Qc1!? 25.Kh2 Nf2-/+) 25.Qb4= Qc7 26.b6 Qd8 27.Qc5 Bc6 28.Nd4 Be8 29.Nb3 Kf8 (29...Ne4 30.Qc7 Qh4 31.g3+/-) 30.Na5 (30.d4 Qe7+/-) 30...Qe7 (30...Kg8+=) 31.Qc7 (31.d4 h6+/-) 31...f6 (31...Qc7 32.bc7 Bd7 33.Nb3=+) 32.d4 (32.Qb8 e5+=) 32...Kf7 (32...Qc7 33.bc7 Bd7=+) 33.Bd1 (better 33.Qc5+/-) 33...Qc7=+ 34.bc7 b6 (better 34...Bd7!?=+) 35.Nb7+= Nc8 (35...Nb7 36.c8Q Decoy) 36.Be2 Bc6?? (36...Ke7 37.Kf1 Bc6=+) 37.Nd8+- Ke7 38.Nc6 Kd7 39.Nb4 (39.Nd8!? e5+-) 39...Kc7 40.Ba6 Nd6 41.Kf1 (41.Bd3 h6+-) 41...b5 42.Ke2 (42.Nd3 Kb6 43.Nc5 e5+-) 42...Kb6 43.Kd3 Ka5 44.Kc3 Ne4 45.Kb3 Nd2 46.Kc3?? (better 46.Kc2 Ne4 47.f3+-) 46...Ne4= 47.Kb2?? (47.Kb3 Nd2 48.Kc2+-) 47...Kb4-+ 48.Bc8 Nf2 49.Be6 (49.Kc2 e5 50.de5 fe5-+) 49...Nd1 50.Kc1 Ne3 51.Kd2 Ng2 52.Kd3 (52.Bd5 Nf4 53.Bg8-+) 52...Nf4 53.Ke3 Nh3 (53...Ne6 54.h4 Kc3 55.h5-+) 54.Kd3?? (54.Bh3 Kc3 55.Bg2 f5 56.Bd5 b4-+) 54...Ka3 (better 54...Nf4 55.Ke3 Ne6-+) 55.Bh3 b4 56.Be6 b3 57.Bd5 (57.Bd5 b2 58.Kc2=) 1-0. BeepBeepImAJeep (2760) - caissaisabelle (2795), lichess.org, 2020.

7.e3 Bd7 8.Nf3 cb5 9.Ne5 Bc6 10.Be2 Nbd7 11.f4 e6 12.0-0 Be7 13.Qe1 0-0 14.Qg3 Ne5 15.Be5 Ne8 16.Nc3 Attacking the isolated pawn on b5 16...b4 17.Nb5 f6 18.Ba1 Bb5 19.Bb5 Nd6 20.Bd3 Ne4 21.Qg4 Qc8 (worse 21...Nd2 22.Qe6 Rf7 23.Rd1+-) 22.Qh5 f5 23.Rd1 Bf6 24.Bf6 Nf6 25.Qf3 Qc5 26.Ra1 Ne4 27.Qe2 g6 (27...Qb6 28.Qd1=+) 28.g3 h5 29.Kg2 Kf7 30.Ra2 Ke7 31.Qe1 Kf7 32.Kh3 Rc8 (32...e5 33.Be4 de4 34.fe5 Qe5 35.Ra7-/+) 33.Kg2= Rd8 34.Rb2 Ra8 35.Be4 de4 36.Kh3 b6 37.Qb1 Ra4 38.Rb3 Qe7 (38...e5 39.fe5 Qe5 40.Rb4 Rb4 41.Qb4=+) 39.Qb2 Qf6 (39...g5 40.fg5 Qg5 41.Qd4=+ (41.Rb4? Qg4 42.Kg2 Rb4 43.Qb4 h4-+)) 40.Rb4= Qb2 41.Rb2 Rc4 42.Kg2 (42.d3 ed3 43.cd3 Rc3=) 42...Rc6 (42...b5 43.d3 Rc5 44.d4=) 43.Kf2 Ke7 44.c3 (44.d4 ed3 45.cd3 Kd6=) 44...Kd6 (44...Kf6 45.Rb5=) 45.Rb5 Kc7 46.Re5 Kd6 47.Rb5 Kc7 48.Re5 Kd6 49.Rb5 ½–½. onur604 (2320) – Shadow_Fighter (2320), lichess.org, 2020.

7.e3 Bg4 8.f3 Bf5=.

7.e3 Bd7 8.Nf3 g6 (8...Bg4 9.h3 Bf3 10.Qf3=) 9.c4 (9.Be5 Qc5+=) 9...dc4 10.Bc4 Qb4 (10...Bg7 11.Qb3 0-0 12.Be5+=) 11.Qc2 (better is 11.Ne5!? Be6 12.Be6 fe6 13.Nc3+/–) 11...Bb5= 12.Bb5 (12.Ba2 Nbd7=) 12...Qb5 13.Nd4 (13.Bf6 ef6 14.Nc3 Qc4=) 13...Qd7+= 14.0-0 Bg7 15.Rc1 c6 (15...Na6 16.Nf3+=) 16.Nf3 0-0 17.d4 (17.Bf6 Bf6 18.d4 Na6+=) 17...Nd5 (17...Na6 18.Ne5 Qe6 19.Nd2-/+) 18.Nbd2 (18.Ne5 Qd6+=) 18...Na6 19.Ne4 (19.Ne5 Qe6+=) 19...Nab4 (19...Ra8 20.Bc3-/+) 20.Qb3 (20.Qb1 Qf5-/+) 20...Qf5+= 21.Ned2 (21.Nc3!? Nd3 22.Nd5 cd5 23.Rc7+=) 21...Qd3-/+ 22.Bc3? (better is 22.Qa4-/+) 22...Nc3?? (better is 22...Na2! 23.Qa2 Nc3 24.Rc3 Qc3-+) 23.Rc3+- Qb5 24.Rc5 Qb6 25.Nc4 Qa7 (25...Ra8 26.Nfd2 (26.Nb6?? Ra1 27.Rc1 Rc1 28.Qd1 Rd1 29.Ne1 Re1) 26...Ra1 27.Nf1+-) 26.Qb4 Qa1 27.Qe1 (27.Ne1 Ra8+-) 27...Ra8 (27...Qe1 28.Ne1 Ra8 29.Kf1+-) 28.g3 (better is 28.Kf1+-) 28...Qa6?? (better is 28...Qe1 29.Ne1 h6+-) 29.Ra5 Qc4 30.Ra8 Bf8 31.Ne5 Qd5 32.Qa5 Qb3 33.Qa2 Qd1 34.Kg2 e6 35.Nd7 Qd3 36.Rf8 Kg7 37.Rf7! Kh6 38.Qe6 (38.Qe6 Qb5 39.Nf6 Qd5 40.Nd5 cd5 41.Qh3 Kg5 42.Qh4) 1–0. Felkl,Karel – Postl,Alexandr, Jiraskuv mem–B, 2001.

7.e3 e5 8.Nf3 Nbd7 9.Bb2 =+.

7.e3 e5 8.Nf3 Nbd7 9.h3 c6 (9...Be7 10.Bb2=+) 10.c4 (10.Bb2 e4 11.Nd4 c5=+) 10...Be7 11.cd5 cd5 12.Be2 0-0 13.0-0 b6 14.d3 Bb7 15.Nh4 (better 15.Qc2=+) 15...e4 (better 15...Qe6=+) 16.Nf5+= Qe6 17.Ne7 (17.de4 A) 17...de4? 18.Bg4 (18.Ne7?! Qe7 19.Bd4 Rc8=) 18...Kh8 19.Ng7+-; B) 17...Ra8 18.Ne7 Qe7 19.Bf6 Nf6 20.ed5 Nd5+-) 17...Qe7= 18.de4 de4 19.Bf6 Nf6 20.Nc3 (20.Qd4 Qc7=) 20...Rd8 21.Qc2 Qe5 22.Qb3 h5 (22...Ne8 23.Bc4 Qf6 24.Nd5 Bd5 25.Bd5+=) 23.Bc4 Rd7 24.Na4 (24.Rd1 Rd1 25.Nd1 Bd5+=) 24...Nd5 (24...Qc7 25.Ra1=) 25.Bd5 (25.Rd1 Rd6+-) 25...Bd5 (25...Rd5 26.Rb1 Qd6 27.Nc3=) 26.Qa3 Qe6 27.Rc1 Bc4 (27...Rd8 28.Rd1=) 28.Qb4 (28.Nb6!? Qb6 29.Rc4 Rd1 30.Kh2 Qb8 31.g3+-) 28...Bd5 29.Rc8 Kh7 30.Qf8 Bb3 (30...Qf6!? 31.Rc1 Rc7=) 31.Qh8 Kg6 32.Nc3 Rd6 (32...Qe5 33.Rc6 Be6 34.g4 hg4 35.hg4+-) 33.Rg8?? (better 33.Re8 Qd7 34.Ne2 (34.Re4?! f5 35.Re8 Bc4+-) 34...Rd1 35.Kh2+-) 33...Qe5= 34.Ne4?? (better 34.g4 hg4 35.hg4=) 34…Rd1 (34...Qe4?? 35.Qg7 Kf5 36.Qg5 Ke6 37.Re8 Kd7 38.Qd8) 0–1. TWW_LONDON (1835) – Gandlf (1925), lichess.org, 2021.

7.e3 e5 8.Nf3 e4 9.Nd4 c5 10.Nb3 Be7 11.c4 0-0 12.h3 (12.d4 ed3 13.Bd3 Rd8+=) 12...Nbd7 13.cd5 Nd5 14.Qg4 (better is 14.d4!?+=) 14...N7f6-/+ 15.Qd1 Be6 16.Be2 Ra8 17.0-0 Bd8 18.Nc3 Nc3 19.Bc3 Bc7 20.Bf6 0–1. Kingeorge (1825) – RC MacMillan (2595), ChessWorld.net, 2003.

7.Nf3 Nbd7 8.Bf6 gf6 (8...Nf6 9.e3+=) 9.e3 Nb6 10.Nc3 Bg7 11.g3 Qc5 12.Nd4 f5 13.Nce2 Bd7 14.Qb1 (14.f4 e6+=) 14...0-0 (14...e5!? 15.Nf3 Qb5 16.Qb5 Bb5+=) 15.c3= Ra8 16.Nf4 (16.Nf5?? Bf5 17.d4 Qc4-+) 16...Nc4 17.Nf5 Na3 Pawn b5, live or die! 18.Qb3? (better is 18.Qd3 Bf5 19.Qf5=) 18...Bf5-+ 19.Bg2 e6 (19...Nb5 20.Qd5 Nc3 21.dc3 (21.Qc5?? Ra1) 21...Qc3 22.Ke2 Qc2 23.Qd2 Qc4 24.Kf3-+) 20.d4 Qb5 21.Qb5 Nb5 22.0-0 (22.c4 Ra1 23.Kd2 Ra2 24.Ke1 dc4-+) 22...Nc3 23.Rc1 Ra3 24.h3 c6 25.g4 Bg6 26.Bf3 b5 0–1. Baer,Cy (1895) – Teske,Heike (2170), RSS7E easy–66, 2007.

5.c4 dc4 (5...Bf5 6.Nf3=+) 6.Qc2 (6.Na3 ab5 7.ab5 c3 8.Bc3 Ne4=) 6...Be6 (6...ab5 7.ab5 Ra1 8.Ba1-/+) 7.e4=+ Nbd7 (7...ab5 8.ab5 Ra1 9.Ba1=+) 8.Bc4 Bc4 9.Qc4 Nb6 (9...ab5 10.ab5 Ra1 11.Ba1=+) 10.Qc2 (10.Qe2 g6=) 10...c4 (10...ab5 11.ab5 Ra1 12.Ba1 Qd7 13.Qc5 Qg4=) 11.a5 (11.Nf3 ab5 12.ab5 Ra1 13.Ba1 Qd3 14.Qd3 cd3=) 11...Nbd7 12.ba6 ba6 (12...Ra6 13.Nf3 Ne4 14.Qe4 Re6=) 13.e5+= Nd5 14.e6 (14.Nf3 e6 15.0-0 Rb8+=) 14...fe6 15.Nf3 Qc7 16.0-0 Rb8 17.Bc3 Nc5?? (better 17...Nf4+=) 18.Be5+- Qb7 19.Bb8 Qb8 20.Qc4 Qd6 (20...Qb4 21.Rc1 Qc4 22.Rc4 Nb7+-) 21.Rc1 Nd7 (21...Nf4 22.Qc5 Ne2 23.Kh1 Nc1 24.Qc1 g6 25.Qc8 Qd8 26.Qe6 Bg7+-) 22.Qc8 Kf7 23.Rc6 Qf4 (23...Nc5 24.Rd6 ed6 25.d4+-) 24.Qd7 Qg4 (24...Qf5 25.Nc3 Nf6+-) 25.Ne5 (25.Ne5 Kg8 26.Ng4 g6 27.Qe6 Kg7 28.Qd5 Rg8 29.Qd4 Kf7 30.Ra3 Rh8 31.Rf3 Kg8 32.Rc8 e5 33.Rcf8 Kg7 34.Qe5) 1–0. Massudy (2135) – Artem_Dnep (2135), lichess.org, 2020.

5.e3 ab5 6.Bb5 Nc6=+.

5.e3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 a6 6.a4).

5.Na3 Bd6 6.Nf3 0-0 7.e3 Re8 8.Be5 c5 9.Be2 +=.

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

5.e3 ab5 6.ab5 Ra1 7.Ba1 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1).

5.Nf3 Bd6 6.e3 0-0 7.Be2 Re8 8.Ne5 ab5 9.ab5 =.

5.Bb5 c6 6.Ba4?? Ra4-+ 7.Ne2 Nbd7 8.0-0 e5 9.d4 e4 10.Nbc3 (10.Nd2 Qb6 11.Qc1 Be7-+) 10...Ra8 11.Ng3 (11.a4 Nb6 12.Ba3 Ba3 13.Ra3 0-0-+) 11...Bd6 (11...Nb6 12.Qc1-+) 12.Nf5 Bf8 (12...Nb6!? 13.Nd6 Qd6 14.h3-+) 13.f3?? (13.Ng3 Nb6 14.Rb1-+) 13...Nb6-+ 14.fe4 de4 15.Ng3 Be7 16.Nce4 Ne4 (16...Ne4 17.Ne4 Nc4-+) 0–1. croach (2385) – yetzaline (2250), net–chess.com, 2015.

5.Bb5 c6 6.Bd3 Nbd7 7.Nf3 Qc7 8.c4 e5 9.Be2 e4 10.Nd4 dc4 11.Bc4 Ne5 12.Be2 Be7 13.Qc2 Qd6 (better is 13...Qd7!?+=) 14.Nc3= Nd3 15.Bd3 ed3 16.Qd3 0-0 17.Qc2 Rd8 18.0-0 c5 19.Nf5 Bf5 20.Qf5 Qd2 21.Rab1 Qd3 22.Qf3 b5 23.Rfd1 Qc2 ½–½. Tiedemann,Joern (2125) – Keber,Ernst (1710), RSS7E adv–18, 2005.

5.Bb5 Bd7 6.Bd7 Nbd7 7.d4 e6 8.Nf3 Bb4 9.Nbd2 0-0 10.a3 Bd6 11.c4 c6 12.c5 Bc7 13.0-0 Qb8 14.Rb1 Ng4 15.h3 Nh2 16.Nh2 Bh2 17.Kh1 Bc7 18.Kg1 e5 19.Qb3 Ra6 20.e4 de4 21.Ne4 ed4 22.Rfd1 Ra5 23.Bd4 Rb5 24.Qc3 Rb1 25.Rb1 g6 26.Nd6 Bd6 27.cd6 Qd6 28.Rb7 Ra8 29.Be3 Ra4 30.Qd2 Qd2 31.Bd2 Nc5 32.Rb8 Kg7 33.Bc3 Kh6 34.Bb4 Nd3 35.Bf8 Kg5 36.Rb3 Rd4 37.Rb6 Rc4 38.Kf1 Rc2 39.Be7 f6 40.f3 Nf4 41.g3 Nh3 42.Bd6 Kf5 43.a4 Ke6 44.Bc7 Kd7 45.Bb8 Rf2 46.Ke1 Rf3 47.Rb7 Kc8 48.Rh7 Kb8 49.Rh3 f5 50.a5 c5 51.Ke2 Ra3 52.Kf2 Ra5 53.Rh8 Kc7 54.Rg8 Ra6 55.Rg7 Kd8 56.Ke3 Rd6 57.Kf4 Re6 58.Kg5 c4 59.Rg8 Kc7 60.Rg7 Kb6 61.Rh7 Kc5 62.Kf4 c3 63.Rc7 Rc6 64.Rc6 Kc6 65.Ke3 Kc5 66.Kd3 Kb4 67.Kc2 g5 68.Kd3 Kb3 69.Kd4 c2 70.Ke5 f4! 71.gf4 gf4 72.Kf4 c1Q 73.Ke4 Qg5 74.Kd4 Qf5 75.Ke3 Kc3 76.Ke2 Qf4 0–1. Bestia02c – Ant416, computer chess game, 2000.

5.a4 e6 6.Nf3 Bd6 7.Be2 Qe7 8.Ne5 0-0 9.0-0=.

5.ba6 Na6 6.Be2 e6 7.Nf3 Bd6 8.Be5 Qe7 9.Nc3=.

5.Nc3 e5 6.d4 ed4 7.ed4 Qe7 8.Qe2 Qe2 9.Be2 Bb4 10.ba6 Ne4 11.ab7 Ra7 12.Bf3 Nc3 13.Ne2 Ne2 14.Ke2 Bb5 15.Kd1 Rb7 16.Bd5 c6 17.Bb3 0-0 18.a4 Ba6 19.Rb1 Re8 20.f4 Be2 21.Kc1 Na6 22.Rg1 Bd6 23.g3 Bb4 24.f5 Reb8 25.Rg2 Bf3 26.Rf2 Re8 27.Rf1 Rbe7 28.Ba1? Ba3 29.Bb2 Re1 30.Kd2 Bb4 31.c3 R8e2 32.Kd3 Be4 33.Kc4 Re3 0–1. Bestia02c – Bionic401, computer chess game, 2000.

5.Bf6 ef6 6.Nc3 ab5 7.Bb5 c6 8.Bd3 Ba3 9.Qh5+=.

5.a4 Bd6 6.Nf3 0-0 7.Be2 ab5 8.ab5 Ra1 9.Ba1 +=.

5.ba6 Na6 6.Nf3 Bd6 7.Be2 0-0 8.0-0 Nb4 9.Nc3 +=.

5.Nf3 Bd6 6.ba6 b6 7.Be2 0-0 8.a7 Nc6 9.0-0 +=.

5.Nf3 Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 a6).

4.a4 c5 5.c4 Bb7 (5...e6 6.Na3=+) 6.cd5= Nd5 7.e3 Nd7 8.Bc4 (8.Nf3 e6=) 8...N7f6 9.Nf3 e6 10.0-0 Be7 11.a5 Qd6 (11...ba5!? 12.Ne5 0-0=) 12.d3 0-0? (12...Nb4!?+=) 13.a6+- Bc8 14.e4 Nb4 (better 14...Qd7 15.ed5 ed5+-) 15.e5 (15.e5 Qd8 16.ef6 Bf6 17.Ne5+-) 1–0. onur604 (2320) – ludlud (2000), lichess.org, 2020.

4.a4 Nbd7 5.e3 Bb7 6.Nf3 e6 7.c4 Qe7 8.Be2 Nc5 (8...dc4 9.Na3=) 9.cd5 ed5 10.0-0 0-0-0 (better 10...a6!?+=) 11.d4 Ncd7 (11...Nce4 12.a5+-) 12.Nbd2 Qe6 13.Rc1 (13.a5 Bd6+-) 13...Ne4 14.Ne4 (14.Qc2 Bd6+-) 14...de4+/- 15.Nd2 Kb8 16.Qc2 Qg6?? (better 16...Bd6+/-) 17.Qc7+- Ka8 18.Qd8 Nb8 19.Rc7 (better 19.Bc4 Qd6 20.Qd6 Bd6 21.Bf7+-) 19...h5 (19...Bd6 20.Qh8 Qh6+-) 20.Rb7! Kb7 (20...Kb7 21.Qd5 Double attack) 21.Ne4! Bc5 (21...Qe4 22.Bc4 Combination) 22.Nc5 (22.dc5?! Rd8 23.Rc1 f6+-) 22...bc5 23.Bf3 Nc6 24.Bc6 (24.bc6 Qc6 25.Qd7 Kb8 26.Bc6 cd4 27.Qb7) 24...Qc6 25.bc6 Kc6 (25...Ka6 26.Qc7 Rb8 27.Qb8 cd4 28.Qb5) 26.Qh8 (26.d5 Kb7 27.Qd7 Ka8 28.Qc6 Kb8 29.Be5) 26...Kd5 (26...Kd7 27.dc5 Kc7 28.Be5 Kd7 29.Rd1 Ke7 30.Qd8 Ke6 31.Qd7 Ke5 32.Rd5 Ke4 33.Qf5) 27.dc5 (27.dc5 a6 28.Qa8 Kc5 29.Rc1 Kb4 30.Qb7 Ka5 31.Bc3 Ka4 32.Ra1) 1-0. BeepBeepImAJeep (2530) - Kurin (1970), lichess.org, 2018.

4.d3 a6 5.a4 Bb7 6.Nf3 Nbd7 7.Nc3 e5 8.e4 (8.e3!?=+) 8...d4 9.Ne2 Bb4 10.c3 dc3 11.Nc3 ab5 12.ab5 Nc5 13.Ne5? (13.Qc2=+) 13...Qd6?? (better 13...Qd4!? 14.Ra8 Ba8-+) 14.Nf3 (14.Ra8 Ba8 15.Nf3 0-0-/+) 14...Ng4 (better 14...Ra1 15.Ba1 Nfe4 16.de4 Ne4-/+) 15.Be2 Rd8 The pressure on the backward pawn d3 grows (15...Ra1 16.Ba1 (16.Qa1? Nd3 17.Bd3 Qd3-+) 16...Qf6 17.Qc2+=) 16.Ra7 (16.0-0 Nd3 17.Bd3 Qd3 18.Qd3 Rd3+/-) 16...0-0 (16...Ne4 17.de4 Qc5 18.Qd8 Kd8=+) 17.0-0+/- Ba8 (17...Ra8 18.Ra8 Ra8 19.h3+/-) 18.Qc2 (18.Na2 Ba5 19.h3 Qe6+-) 18...f5 19.h3 Ne5? (better 19...fe4 20.Ne4 Be4 21.de4 Rf3+-) 20.Ne5 Qe5 21.Nd5! Qd6 (21...Qd5 22.ed5) 22.Nb4 fe4 23.de4 (23.d4 Ne6 24.Bc4 Kh8 25.Be6 Qe6+-) 23...Be4 24.Qc3 Rf6 (24...Rd7 25.f3 Bf5 26.Rd1+-) 25.Bc4 (25.Qc4 Rf7 26.Bh5 g6+-) 25...Kh8 26.f3 Bf5 27.Qe3 Rff8 28.Be5 Qe7 (28...Qg6 29.Rc7 Nd7+-) 29.Nc6 Qd7 (29...Qh4 30.Nd8 Rd8 31.Bc7 Rc8+-) 30.Rc7 Qd2 31.Bg7 1-0. amikhlin (2600) - vaingrecsky (2175), net-chess.com, 2022.

4.e3 a5 5.a4 g6 6.Nc3 Bg7 7.Nf3 0-0 8.d4 Ne4 (8...c5 9.dc5 Ne4 10.Ra3 Nc5 11.Be2=) 9.Ne4+= de4 10.Ng5 (10.Nd2 Bb7+=) 10...Bb7 11.c4 h6 12.Nh3 c5 13.Nf4 (13.bc6 Nc6 14.Rb1 Nb4=) 13...Nd7 14.h4 (14.Be2 Qc7 15.Nh3 cd4 16.ed4 Nc5 17.dc5 Bb2 18.cb6 Qb6+=) 14...e5 (14...cd4 15.ed4 e5 16.Nd5+=) 15.de5= Ne5 16.Qc2 Qc7 17.Nd5 (17.Rd1!?=) 17...Bd5-/+ 18.cd5 Nd3 19.Bd3 Bb2 (better is 19...ed3!? 20.Qc1 Bb2 21.Qb2 Rad8-/+) 20.Qb2= ed3 21.Qd2 (better is 21.h5!?=) 21...c4 (21...Qe5 22.Ra3 Qd5 23.f3-/+) 22.0-0 (22.Rc1!? Rac8 23.e4-/+) 22...Qe5-+ 23.e4 Qe4 24.Qh6 Qd5 25.Qe3 Qe6 26.Qd2 Qf6 27.Rac1 Rac8 28.Rfe1 Qh4 29.Re3 Qg5 30.Qc3? Rfe8 31.Rh3 Qe5 32.Qd2? Qg7 33.g3?? Re2 34.Qd3 cd3 35.Rc8+= Qf8 36.Rf8?? Kf8-+ 37.Kf1 Ra2 38.Rh4?? Ke7 39.Rd4 d2 40.f3? Ke6 41.Ke2-/+ Ke5 42.Rd2?? Rd2-+ 43.Kd2 Kd4 44.g4 Kc4 45.g5 Kb4 46.Kd3 Ka4 47.Kc4 Ka3 48.Kc3 a4 49.Kc4 Kb2 50.Kd5 a3 51.Kc6 a2 52.Kb6 a1Q 53.Kb7 Kc3 54.b6 Kd4 55.Kb8 Ke3 56.b7-+ Kf3 57.Kc8 Qc3 58.Kb8 Kf4 59.Ka8 Qe5 60.b8Q Qb8 (60...Qb8 61.Kb8 Kg5-+) 0–1. Henkel,Scott – Griffin,John, Kalamazoo op01, 2000.

4.e3 a6!? =.

4.e3 Bd7 5.Nf3 c6 6.a4 a6 7.c4 ab5 8.cb5 cb5 9.ab5 Ra1 10.Ba1 e6 11.Be2 Bb4 12.0-0 0-0 13.Ne5 Be8 14.Nc3 Nbd7?? (Better is 14...Qc7 15.f4 Bd7=) 15.Nc6+- Qc8 16.Na2 Bd6+= 17.d4 Nb8 18.Qc1 Bc6 19.bc6 Nc6 20.Bb5 Bb8?? 21.Bc6+- Qc7 22.Nb4?? Qh2# 0–1. stoker – LORDVADER05, Live Game Caissa's Web, 2004.

4.e3 e5 5.Be5+= Bb4 6.c4 d4? (6...0-0!?+/–) 7.Bd4 (better is 7.Qf3!? c6 8.bc6 Qe7 9.Bd4 Qc7+-) 7...Nbd7 8.Qf3 Rb8 9.Qg3 Ne4? (better is 9...0-0+-) 10.Qg7 Rf8 11.Qh7 Qg5 (11...Ndf6 12.Qh6 Bd6+-) 12.Qe4 Kd8 13.Nf3 Qh5 14.Nc3 Bb7 15.Nd5 Re8 16.Qf4 (16.Nb4?! Be4 17.Be2 Qg6+-) 16...Rc8 (16...Bd5 17.cd5 Bc5 18.Bc5 bc5 19.Qg5 Qg5 20.Ng5+-) 17.g4 (better is 17.Nb4 c5 18.bc6 Bc6+-) 17...Qg6 18.Nb4 Re4 19.Qg5 Ke8 20.Rg1 c5 21.bc6! Bc6 22.Bd3 a5 23.Nc6 (23.Qg6 fg6 24.Nc6 Re6+-) 23...Rc6 24.Qd5 (24.Qg6!? Re3 (24...Rg6?? 25.Be4 Rd6 26.Bd5+-) 25.fe3 fg6+-) 24...Rce6 25.Nh4 Rg4 26.Bg6 Rg1 27.Ke2 Ra1 28.Qe6 Kd8 29.Qf7 Ra2 (29...Rg1 30.Bf5 Rg7 31.Qg7 Kc7 32.Qd7 Kb8 33.Be5 Ka8 34.Be4) 30.Bf5 a4 (30...Rd2 31.Kd2 Kc7 32.Qd7 Kb8 33.Be5 Ka8 34.Be4) 31.Qd7 1–0. Taulien,Hans_Juergen (2350) – Uli,Ulrich (1870), remoteschach.de, 2003.

4.e3 g6 5.c4 Bg7 6.Nf3 0-0 7.Nc3 Bb7 8.Qb3 Ne4 (8...dc4 9.Bc4 a6 10.Ne5=) 9.Ne4 (better 9.Nd5!? Bb2 10.Qb2 Bd5 11.cd5+-) 9...de4 10.Ng5 (10.Bg7 Kg7 11.Ng1 e5=) 10...Bb2 11.Qb2 h6 12.Nh3 Nd7 13.Be2 Nf6 (13...Nc5 14.0-0=+) 14.0-0 Qd7 (14...a6 15.d4+=) 15.f3 (15.Rfd1 Rfd8+=) 15...ef3 16.Bf3 Bf3 17.Rf3 g5 (17...a6 18.Nf2 Rfd8 19.Rf6 ef6 20.Ne4=+) 18.Raf1 (18.Nf2 Rfd8 19.d4 c6+=) 18...g4 (better 18...Rfd8 19.d4 a6=) 19.Rg3?? (19.Rf6 ef6 20.Nf4 Qd6+-) 19...Kh7?? (better 19...Nh5!? 20.Qe5 Ng3 21.Qg3 a6-+) 20.Nf4 (20.Nf2!?+=) 20...Ne4= Exerts pressure on the backward pawn 21.Nh5 Ng3?? (better 21...Kg6 22.Rf4 Ng3 23.Ng3 f5=) 22.Qg7 1–0. AhmedSultanov (1640) – Glen49 (1645), lichess.org, 2019.

4.f3 a6 5.a4 Nbd7 6.d4 e6 7.c3 Bb7 8.g4 h6 9.h4 Be7 10.Qc1 e5 11.Bg2 e4 12.Nd2 Bd6 13.Rh3 ab5 14.ab5 Ra1 15.Qa1 c6 (15...e3 16.Nf1 Bf4 17.Rh1=) 16.bc6 Bc6 17.Ba3 Qe7 18.Bd6 Qd6 19.Qa6 0-0 20.Qa2 Ra8 21.Qb1 ef3 22.Bf3 Qf4 23.g5 hg5 24.hg5 Qg5 25.Kf2?? (better is 25.Nf1-/+) 25...Qd2-+ 26.Qd3 Qd3 27.ed3 Ra2 28.Ne2 Bb5 29.Ke3 g6 30.Rg3 Nf8 31.Rg5 N8h7 32.Re5 g5 33.c4 Bc6 34.cd5 Bb5 35.Re7 Kf8 36.Rb7 Ra3 37.Nc1 g4 (37...Nd7 38.d6-+) 38.Bh1 g3 39.Rb6 Ng4 40.Kd2? Ba4 41.d6 Nhf6 42.Ne2 Ra2 43.Ke1 Ra1 (43...Ra1 44.Kd2 Rd1 45.Kc3 Rh1 46.Rb8 Kg7 47.Ng3 Nd5 48.Kb2 Rh2 49.Ka3 Nc3-+) 0–1. SCRATCHY – icewater, Live Game Caissa's Web, 2004.

4.Nf3 Nbd7 5.e3 e5 6.Ne5 Ne5 7.Be5 Be7 8.c4 0-0 9.Nc3 Ne4 (9...Be6!?+/–) 10.Nd5 Bc5? (better is 10...Bd6 11.d4 Be5 12.de5 Be6+-) 11.Bc7 (11.Nc7?! Bb4 12.Be2 Bd2 13.Kf1 Qh4+/–) 11...Qg5 12.Bf4 Qf5 13.Qb1 g6 (13...Re8 14.f3 Nf6+-) 14.Qe4! Qe4 15.Nf6 Kh8 16.Ne4 Bf5 17.Nc5 bc5 18.d4 cd4 19.ed4 Rfe8 20.Kd2 Rac8 21.c5 Re4 22.Be3 Kg8 23.Bd3 Re7 24.Bf5 gf5 25.Rac1 Kg7 26.c6 Re6 27.Kd3 Rd6 (27...Kf6 28.d5 Re3 29.Ke3+-) 28.Bf4 Rd5 29.Kc4 Rdd8 30.d5 Re8 31.d6 Re4 32.Kb3 Rf4 33.d7 Rd8 34.Rhd1 Rf2 35.c7 (35.c7 Rd7 36.Rd7+-) 1–0. Trkn – guest1009, ICC, 2004.

5.e3 a5 6.Nf3 Nbd7 7.c4 dc4 8.Bc4 Nc5 (8...e6 9.0-0=) 9.d4+= Nce4 10.0-0 e6 11.Nbd2 Bb4 12.Ne4 Ne4 13.Ne5 0-0 14.Be2 (14.Ba3 Nc3 15.Qc2 Be4+=) 14...Nf6 (14...Nd2!? 15.Re1 Qg5=) 15.Bf3 Ra7 (15...Nd5 16.e4 Ne7 17.Rc1+=) 16.Bb7 Rb7 17.Nc6 Qd7 18.Qf3 Nd5 19.Rac1 f5 20.Ne5 Qe7 21.Rc6 Nf6 22.Rfc1 Rc8 (22...Bd6 23.R6c2 Nd5 24.Nc4+=) 23.h3 (23.Re6 Qe6 24.Qb7 Nd5+-) 23...h6 (23...Nd5 24.R6c2+/-) 24.R6c4 (better 24.Re6 Qe6 25.Qb7+-) 24...g5?? (better 24...Nd5+/-) 25.Qb7+- Rf8 (25...Qe8 26.Rc7 Rb8 27.Rg7 Kf8 28.Qf7 Qf7 29.Rf7 Kg8 30.Rf6 Re8+-) 26.Rc7 Qd6 27.Rg7 Kh8 28.Ng6 1-0. BeepBeepImAJeep (2515) – naym, lichess.org, 2017.

5.e3 a6 6.Nf3 ab5 7.ab5 c6 (7...Ra1 8.Ba1 e6 9.Be2=) 8.Ra8+= Ba8 9.c4 cb5 10.cb5 (10.cd5 Nd5 11.Bb5 Bc6 12.Bc6 Nc6+=) 10...Nbd7 (10...e6 11.Be2=) 11.Be2+= Qb8 12.0-0 e5 13.d4 Bd6 (13...e4 14.Nh4=) 14.de5+= Ne5 15.Ne5 Be5 16.Be5 Qe5 17.Nd2 0-0 18.Nf3 Qe7 19.Nd4 Rc8 20.Qa1 Ne4 21.Rc1 Bb7 22.Rc8 Bc8 23.Qa8 Qc7 (23...Qb7!? 24.Qb7 Bb7+=) 24.Qd5+/- Nd2? (better 24...Bb7!? 25.Qc4 Qc4 26.Bc4 Nd2+/-) 25.Nc6+- Nb1? (25...Qd7+-) 26.h3 (better 26.Qe4 Be6 27.Bd3+-) 26...Nc3 27.Qc4 Ne2 28.Qe2 g6 29.Qd3 Bd7 30.Ne7 Kf8 31.Nd5 Qd6 (31...Qc5!?+/-) 32.Qd4+- Bb5?? (32...f6 33.Nf6 Qd4 34.ed4 Bb5+-) 33.Qh8 1-0. BeepBeepImAJeep (2545) - ediboss21 (2170), lichess.org, 2017.

5.e3 Nbd7 6.Nf3 e6 7.c4 Bc5 8.Be2 (8.cd5 ed5 9.d4 Bb4 10.Nbd2 0-0=) 8...0-0 9.0-0 h6 (9...dc4 10.Na3=) 10.d4+= Be7 11.Nc3 dc4 12.Bc4 Bf3 (better 12...c5!?+=) 13.Qf3+/- (13.gf3?! Rc8=) 13...Nd5? (better 13...Bb4+/-) 14.Nd5+- ed5 15.Bd5 Nf6 (15...Rb8 16.Bc6+-) 16.Bc6 (16.Ba8!? Qa8 17.Qa8 Ra8+-) 16...Rb8 17.a5 Bb4 18.ab6 ab6 19.Ra7 Qd6 20.Rfa1 Rfe8 (20...Rbd8 21.e4 Qe7 22.R1a4+-) 21.h3 (better 21.e4+-) 21...Nh5 (21...Red8+-) 22.Qh5 (22.Be8 Re8 23.Qh5 Qd7+-) 22...Qf6 (22...Red8 23.Qg4+-) 23.Be8 Re8 24.Ra8 (better 24.Rc7!? Rd8+-) 24...Ra8 25.Ra8 Kh7 26.Qf3 Qd6 (26...Qg6 27.e4 Bd6 28.e5+-) 27.Qf5 (better 27.Qf7!? Qf6 28.Qb3 Bd6 29.Qc2 g6+-) 27...g6 (27...Qg6 28.Qg6 Kg6+-) 28.Qf7 1-0. BeepBeepImAJeep (2610) – sriramprasad, lichess.org, 2018.

5.e3 Nbd7 6.Nf3 e6 7.c4 Bd6 8.Be2 0-0 9.0-0 a6 10.d3 ab5 11.ab5 Ra1 12.Ba1 Qa8 (12...dc4 13.dc4 Qe7 14.Qc2=) 13.Nbd2 Qa3 14.e4 (better 14.cd5!? Nd5 15.Qc2=) 14...de4-/+ 15.de4 Ne4 16.Qc2 Nd2 17.Qd2 Bf3 (17...e5 18.Qc2-/+) 18.Bf3=+ Ne5 19.Be5 Be5 20.Qe1 (20.Rd1 Qe7=+) 20...Qd6-/+ 21.Qe4 (21.h3!?-/+) 21...Bh2-+ 22.Kh1 Be5 23.Rd1 Qc5 24.Qh4? (better 24.Kg1!?-+) 24...Bf6 25.Qg4 (25.Qg3 Bd4-+) 25...Rd8 (better 25...Qf2!? 26.Qe4-+) 26.Rd8 Bd8 27.Qe4 (27.Kg1 Bf6-+) 27...Qe7 (better 27...Qf2 28.Qe2 Qh4 29.Kg1 Be7-+) 28.Qc6 g6 29.Be4 (29.g3 Kg7-+) 29...Kg7 30.f3?? (30.g3 Qg5-+) 30...Qd6 (30...Qh4 31.Kg1 Bg5 32.Kf1 Be3 33.g3 Qh2 34.Ke1 Qf2 35.Kd1 Qd2) 31.Qe8?? (better 31.Qd6 cd6 32.Bc6-+) 31...Bf6 32.Qa8 (32.Bg6 hg6 33.Qc6 Qd1 34.Kh2 Be5 35.f4 Bf4 36.g3 Bg3 37.Kg3 Qd6 38.Qd6 cd6 39.Kf3-+) 32...Bd4 (32...Qg3 33.Qf8 Kf8 34.Bf5 Be5 35.f4 Bf4 36.Be6 Qe1) 33.Qa2 Qe5 (33...Qg3 34.Bf5 gf5 35.Qf2 Qf2 36.c5 Qh4) 34.Qc2 (34.g4 f5 35.Qh2 Qh2 36.Kh2 fe4 37.fe4-+) 34…Qh5 0–1. KLINGON09 (1835) – Elpruno (1885), lichess.org, 2019.

5.e3 e5 6.Nf3 d4 7.Ne5 Nbd7 (better 7...de3!? 8.de3 Bb4 9.c3 Qd1 10.Kd1 Bd6+/-) 8.Nd7 Nd7 9.Bd4 Nc5 10.Be2 (10.a5 Ne6 11.Bc3 Bd6+-) 10...Bd6 (10...Bg2 11.Rg1 Bd5 12.Nc3+- (12.Bg7 Rg8-/+; 12.Rg7? Bg7 13.Bg7 Rg8-+)) 11.0-0 (11.Bg7?! Rg8 12.d4 Nd7=) 11...0-0 12.f4 Ne4 (12...a6 13.Bf3+-) 13.Bf3 Rb8 14.Nc3 Nc3 15.Bc3 Bf3 16.Qf3 (worse 16.gf3 c6+-) 16...c5 (16...Qd7 17.Rfb1+-) 17.Qg3 (17.bc6 Qc7+-) 17...g6 18.Rae1 Re8 19.Qg4 White plans f5 19...Bf8 (19...f5 20.Qf3+-) 20.f5 h5 (20...Qd6 21.Qc4 Rb7 22.fg6 hg6 23.Rf6+-) 21.Qg3 g5 (21...Bd6 22.Qf3 Qh4+-) 22.f6 Bh6 23.Qh3 (better 23.Qf3!? Kh7 24.Qh5 Qd7+-) 23...h4 24.Qg4 Kh7 25.Qh5 Re4 (25...Qd7+-) 26.Qf7 Kh8 27.Qg6 (27.Qg6 Qf8 28.f7 Rd4 29.ed4 Rd8 30.d5 Bg7 31.Qh5) 1-0. BeepBeepImAJeep (2655) - chessvy (1650), lichess.org, 2017.

4.a4 a5 5.e3 b6 6.c4 g6 (6...e6 7.Nf3=) 7.Nf3 e6 8.Be2 Bg7 9.0-0 0-0 10.d4 Ne4 11.Nbd2 f5 12.Ne5 Nd7 13.Ndf3 (13.Nc6 Qf6+/-) 13...Ne5 14.Ne5 Qc7 15.Nc6 (15.f3!? Ng5 16.cd5 ed5 17.f4+=) 15...Bb7= 16.cd5 ed5 17.Rc1 (17.Ne5!?=) 17...Bc6-/+ 18.bc6 Qc6 19.Bb5 Qd6 20.Ba3 Rfc8 Black prepares the advance c4 21.dc5 bc5 22.Qd3 Qe6 23.Rfd1 c4 24.Qd5 Qd5 25.Rd5 Nc3 26.Rd2 Nb5 27.ab5 Rab8 28.Rd5 c3 29.g3 (29.Kf1 Bf6=+) 29...c2 (29...Rb6 30.Rb1-/+) 30.Rd2 Rb5 31.Rdc2 Rc2 32.Rc2 a4 (32...Be5!?=+) 33.Rc4 (33.Rc8 Kf7 34.Ra8 Rb1 35.Kg2 Ra1 36.Ra4 Bc3+=) 33...Ra5 34.Rc8 Kf7 35.Rc7 Kg8 36.Rb7 (36.Rc8 Kf7=) 36...Ra8=+ 37.Kf1 Bf8 (37...h6 38.Ke2=+) 38.Bf8= Kf8 (worse 38...Rf8 39.Ra7+/-) 39.Rb2 (39.Rh7!? Ra6 40.Rd7=) 39...a3 40.Ra2 Ke7 41.Ke2 Kd6 42.Kd3 Kc5 43.Kc3 Kd5 44.f3 Re8 (44...g5!?=+) 45.Kd3= Ra8 46.Kc3 Re8 (46...g5!?=+) 47.Kd3= Ra8 48.e4 (better 48.Kc3!?=) 48...fe4-/+ 49.fe4 Ke5 50.Ke3 Ra4 51.Kd3 g5 (51...Re4?! 52.Ra3 Rb4 53.h3=) 52.h3 (better 52.Ra1!?-/+) 52...h5-+ (52...Re4?! 53.Ra3 Rd4 54.Ke3=) 53.Ke3 Re4 54.Kf3 Ra4 Black prepares h4 55.g4? (55.Ke3-+) 55...Rf4 (55...hg4 56.hg4 Kd5 57.Ra1-+) 56.Ke3?? (better 56.Kg2-/+) 56...h4 (better 56...hg4 57.hg4 Rg4-+) 57.Ra3= Rd4 58.Ra5 Rd5 59.Ra7 Rd6 60.Re7 Re6?? (60...Kf6 61.Rb7=) 61.Ra7 (61.Re6 Ke6 62.Ke4+-) 61...Kf6 62.Kf3 Kg6 63.Ra5 Rf6 64.Kg2 Re6 65.Ra2 Rf6 66.Re2 Rd6 67.Re5 Rf6 68.Re4 Rd6 69.Re2 Rd3 70.Rf2 Rd6 71.Kh2 Rf6 72.Rg2 Rf3 73.Rg1 Rf4 74.Rg2 Rf6 75.Rg1 Rf4 76.Rg2 Rf6 77.Rg1 Rf4 ½-½. BeepBeepImAJeep (2735) - chessconqueso (2580), lichess.org, 2019.

4.a4 b6 5.e3 Bb7 6.c4 Nbd7 7.Nf3 e6 8.Be2 Be7 9.0-0 h6 10.d4 dc4 11.Bc4 Rc8 12.Nbd2 cd4 13.Nd4 e5 (13...0-0 14.Be6 fe6 15.Ne6=) 14.Nf5+= 0-0 15.Be2 (15.Rc1 Bb4+=) 15...Bb4 (15...Bd5 16.Rc1 Rc1 17.Qc1=) 16.Nc4+= Ne4 17.Ne5 Ne5 18.Be5 Nd2 19.Nd6?? (19.Bg7 Qd5 20.Bf3 Qf5 21.Bb7 Kg7 22.Bc8 Rc8+=) 19...Rc7?? (better 19...Bd6 20.Qd2 Be5 21.Qd8 Rfd8-+) 20.Nb7+/- Rb7 21.Re1 Rd7 (21...Qe7 22.f4+=) 22.Bd4 1-0. BeepBeepImAJeep (2575) - Kaissa_V, lichess.org, 2018.

4.a4 Nbd7 5.c4 d4 6.e3 e5 7.ed4 cd4-+ 8.Nf3 Nc5 9.d3 Bd6 10.Nbd2 0-0 11.Nb3 Bf5 Black plans e4 12.Be2 e4 13.Nc5?? (better 13.de4 Nb3 14.ef5 Na1 15.0-0=+) 13...ef3-+ (13...Bc5?! 14.de4 Ne4 15.Bd3 Bb4 16.Kf1 Nd2 17.Nd2 Bd3 18.Kg1-+) 14.Bf3 Bc5 15.Bb7 (15.0-0 Qc7 16.h3-+) 15...Qe7 16.Be4 Ne4 17.de4 (17.0-0 Nc3 18.Qf3 Ne2 19.Kh1 Bd7-+) 17...Qe4 18.Qe2 (18.Kf1 Rae8 19.h3 d3-+) 18...Rfe8 (better 18...Qg2 19.0-0-0 Rfe8-+) 19.Qe4 Be4 20.Kd2 0-1. TimC (2135) - worldsong (2510), Rated Bullet game, lichess.org, 2015.

4.a4 g6 5.e3 Bg7 6.c4 0-0 7.Nf3 a5 8.cd5 Qd5 9.Be2 Qd8 10.0-0 b6 11.d4 Nbd7 12.Nbd2 Bb7 13.Nc4 Rc8 14.Nfe5 Ne5 (14...Qc7 15.Nd7 Nd7 16.Rc1=) 15.Ne5 (15.de5 Nd7+=) 15...Nd5 (15...Nd7 16.Bf3 Bf3 17.Nf3 cd4 18.Nd4=) 16.Bf3 Be5 (16...c4 17.Rc1 c3 18.Ba1+=) 17.de5+= e6 18.Rc1 Qe7 19.Qb3 Nb4 20.Be2 (20.Bb7 Qb7 21.Rfd1 Rfd8+=) 20...Bd5 21.Bc4 (21.Qa3 Qh4=) 21...Rfd8 22.Ba3 Ba8 23.Bb4 cb4 24.Rfd1 (24.Qb2!?=) 24...Rd1 25.Rd1 Qc7 (25...Qg5 26.Bf1 Qe5 27.Rd4-/+) 26.Bf1 (better 26.Be6!? fe6 27.Qe6 Kf8 28.Qf6 Kg8 29.Qe6 Kh8 30.Qf6 Kg8 31.Qe6=) 26...Qe5-/+ 27.Qd3 Bd5 28.h3 (28.Qb1!?-/+) 28...b3 29.Rb1 Be4 30.Qb3 Bb1 31.Qb1 Qc5 32.Qd1 Qc1 33.Qd7 Rc2?? (better 33...Qc7 34.Qd1 Qd8-+) 34.Qd4?? (34.Qd8 Kg7 35.Qd4 f6 36.Qd7 Kh6 37.Qd8=) 34...Rd2 35.Qc4 Qc4 36.Bc4 Rd1 37.Kh2 Rd2 38.Kg3?? (38.Kg1 Rc2 39.Bd3-+) 38...Rc2 (38...Rb2 39.Bd3-+) 39.Bd3? (39.Bb3 Rc3 40.Bd1 e5-+) 39...Rc3 (39...Ra2 40.Kf3-+) 40.Be4? (40.Be2 e5-+) 40...Ra3 (better 40...Rc4 41.Bc6 Ra4-+) 41.Kf4?? (better 41.Bc2-+) 41...Ra4 42.Ke5 (42.Kf3 Rb4 43.Bc2 a4 44.Ba4 Ra4-+) 42...Rb4 (better 42...f6 43.Kf4 f5-+) 43.Bc6 (43.Bc2-+) 43...a4 44.Kf6 a3 45.Be8 Kf8 46.Bf7 a2 47.Be6 (47.Bg6 a1Q 48.Ke6 Rb5 49.Be4 Re5 50.Kd7 Re7 51.Kc6 Qa5 52.Bh7 Qc5) 47...a1Q 48.Kg5 Rb5 (48...Qe5 49.Bf5 Qf5 50.Kh6 Rh4) 49.Kh4 Qf6 50.Kg3 Rg5 (50...Rb2 51.Bd5 Qg5 52.Kf3 Qd5 53.Kg3 Qg5 54.Kf3 Qf5 55.Kg3 Qf2 56.Kg4 Rb4 57.e4 Re4 58.Kg5 Qf4) 51.Bg4-+ h5 52.f4 hg4 53.fg5 Qg5 (better 53...Qe5 54.Kg4 b5 55.e4-+) 54.h4 Qe3 55.Kg4 b5 56.g3 (56.h5 gh5 57.Kf5 b4 58.Kg6 b3 59.Kf6 b2 60.Kg6 b1Q 61.Kh5 Qf5 62.Kh4 Qfg5) 56...b4 (56...Qe4 57.Kh3 Qh1 58.Kg4 Qf1 59.Kg5 Qf5 60.Kh6 Qh5) 57.h5 b3 (57...Qe4 58.Kh3 gh5 59.Kh2 b3 60.g4 Qf4 61.Kg2 b2 62.gh5 b1Q 63.h6 Qbf1) 58.hg6 (58.h6 Qe4 59.Kh3 b2 60.h7 Qh1 61.Kg4 b1Q 62.h8Q Qh8 63.Kf4 Qf5 64.Ke3 Qc3 65.Ke2 Qff3) 58...Kg7 59.Kf5 (59.Kh4 b2 60.Kg4 b1Q 61.Kh3 Qh1 62.Kg4 Qhf3 63.Kh4 Qh6) 59...b2 60.g4 (60.Kg4 b1Q 61.Kh3 Qh1 62.Kg4 Qhf3 63.Kh4 Qh6) 60…b1Q 0-1. BeepBeepImAJeep (2755) - Isthemoment (2595), lichess.org, 2020.

4.e3 Qb6 5.c4 a6 6.a4 Nc6?? 7.Bf6+- ab5? 8.ab5 Ra1 9.Ba1 Nb4 10.Nc3 Bf5 11.Nd5 Qa5 12.Bc3 Qa3 13.d3 e6?? 14.Nb4 Qc3+= 15.Qd2 Qd2 16.Kd2+- cb4 17.Kc2 Kd7 18.Nf3 f6 19.Nd4+- Bd6 20.e4 Bg6 21.Nb3 Ra8 22.Kb2 Be5 23.d4+- Bd6 24.Bd3 b6 25.c5 bc5+/– 26.dc5 Be5+= 27.Kb1 Ra3= 28.Bc2 f5 29.f3 fe4= 30.fe4 Be4=+ 31.Rd1 Bd5-/+ 32.Rd3 Kc8-+ 33.g3 Bc3 34.Rc3 bc3 35.Nd4 Ba2 36.Kc1 Bc4 37.b6?? Ra1-+ 38.Bb1 Bd3 39.Nc2 Bc4 40.Na1+- Bd5 41.Bh7 Kb7 42.Nc2 Bb3 43.Nb4 Ba4 44.Be4 Kc8 45.b7 Kb8 46.Na6 (46...Ka7 47.b8Q Ka6 48.Qb6) 1–0. Bittner,Hannjoerg – Schwieger,V, Stadt–M Braunschweig, 1985.

4.e3 Nc6?? 5.c4?? (5.bc6 bc6 6.Nf3 e6+-) 5...Nb4?? (better 5...Nb8=) 6.a3+- Nc6 7.bc6 bc6 8.Nf3 e6 9.Nc3 (9.Qa4 Bd7+-) 9...Rb8 10.Ra2 Ba6 (10...Bd6 11.cd5 ed5 12.Qa4+-) 11.Ne5 (11.Qa4!? Rb6+-) 11...Qc7 12.Na4 (12.Ng4!? Nd7 13.f4 Bd6+-) 12...Rb2 13.Rb2 (13.Nb2 Qe5 14.Qa4 Bc8 15.cd5 ed5 16.Qc6 Kd8+-) 13...Qe5+- 14.Qb1 Bd6? (14...Nd7!?+-) 15.Nc5! Bc8 (15...Bc5 16.Rb8 Decoy) 16.d4 Qg5 17.Nb7 (better 17.Qc2 Bc5 18.dc5+-) 17...Bb7? (better 17...Ba3 18.Ra2 Be7+-) 18.Rb7 0-0 (18...Ne4 19.c5 Be7 20.Ra7+-) 19.Ra7 (better 19.c5 Bc5 20.dc5+-) 19...c5 (19...dc4 20.Qc2+-) 20.cd5 (20.h4 Qh6 21.Qb6 Ne4+=) 20...Nd5 21.g3 (better 21.h4!? Qf6 22.Qe4+-) 21...cd4+- 22.ed4 (22.f4 Qf6 23.e4 Nc3+=) 22...Rb8 (22...Rc8 23.f4 Bf4 24.Qd3= (24.gf4?? Qh4 25.Ke2 Nc3 26.Ke3 Nb1-+)) 23.Qc2+= Nf6? (better 23...Qg4 24.Bg2 Qd4=) 24.Bg2+- h6 (24...Qb5+-) 25.0-0 Qh5 26.Ra8 (better 26.Qc6 Bf8 27.Qc7+-) 26...Ng4?? (better 26...Ra8 27.Ba8 Ba3+-) 27.Rb8 Bb8 28.h3 Bg3 (28...Bd6 29.Qc8 Bf8 30.hg4+-) 29.fg3 Ne3 (29...Nf6 30.Rb1 g5 31.g4 Ng4 32.d5+-) 30.Qc8 Kh7 31.Be4 f5 32.Rf3 (32.Qe6 Qh3 33.Bf5 Nf5 34.Qf5 Qf5 35.Rf5 Kg6+-) 32...fe4 33.Re3 Qd1 34.Kf2 Qd2 35.Re2 Qd4 36.Re3 (better 36.Kg2 Qd5 37.Qc2+-) 36...Qd2= 37.Re2 e3?? (37...Qd4 38.Kg2 Qd3+-) 38.Kf3+- Qd5 39.Ke3 e5 (39...Qb3 40.Kf2 Qa3 41.Qe6 Qf8 42.Ke3 Qc5 43.Ke4 Qb4 44.Kf3+-) 40.Qf5 (40.Kf2 Qf7 41.Kg2 Qd5 42.Kh2 Qd3+-) 40...Kg8 (40...g6 41.Qd3 Qe6+-) 41.Qc8 (41.Rc2 Qb3 42.Kf2 Qb6 43.Kg2 Qf6 44.Rc8 Kf7 45.Qh5 Ke6 46.Rc6 Ke7 47.Rf6 Kf6+-) 41...Kh7 42.Qf5 g6?? (42...Kg8 43.Rc2 Qb3 44.Kf2 Qb6 45.Kg2 Qf6 46.Rc8 Kf7 47.Qh5 Ke6 48.Rc6 Ke7 49.Rf6 Kf6+-) 43.Qd3+- Qc5 (43...Qe6 44.Rb2 Qe7 45.Rb5+-) 44.Kd2 Qa5 (44...Qa5 45.Qc3 Qd5 46.Kc1 Qh1 47.Re1 Qb7+-). AhmedSultanov (1675) – DrunkAcc123 (1815), lichess.org, 2019.

4.e3 Nbd7 5.Nf3 Qc7 6.c4 e5 7.d3 d4=+ 8.e4 Be7 9.g3 Nf8 10.Bg2=+ Ne6 11.a4 0-0 12.a5 g6 13.0-0= Ng7 14.Nbd2 Nfh5 15.Qb3 Qd6 16.Rfe1 Be6 17.a6 b6 18.Bc1 Rae8 19.Nf1 Qc7 20.Bh6 Bd6 21.Ng5 Bc8 22.Qd1 f6 23.Nf3 Be6 24.Qc1 Qd7 25.Kh1 Kh8 26.Ng1 Qc7 27.h3 f5 28.Nd2 f4 29.g4 f3 30.Ndf3 Nf4 31.Bf4 Rf4= 32.Re2 Ref8 33.Raa2 Qe7 34.Nh2 h5 35.f3 Qh4 36.Qe1 Qe1 37.Re1 h4 38.Ne2+/– R4f7 ½–½. Rehbein,Hans Juergen (1775) – Bauer,Norbert (2085), Germany, 2005.

4.e3 Ne4 5.Nf3 (5.Ne2 Qd6 (5...e6 6.Nf4 Nd7 7.c4 Ndf6 8.d3 Nd6) 6.c4 dc4 7.Na3 Be6 8.Qc2 Qd3; 5.Be2 e6 (5...Nd7 6.Nf3 e5 7.0-0 Bd6 8.c4 dc4; 5...a6 6.ba6 Na6 7.Nc3 Nc3 8.Bc3 e6; 5...f6 6.f3 Nd6 7.f4 Bf5 8.Nf3 a6; 5...Qb6 6.Nc3 Nc3 7.Bc3 d4 8.Bb2 e5) 6.Nf3 Be7 7.0-0 0-0 8.d3 Bf6; 5.f3 Nd6 (5...Nf6 6.c4 e6 7.g4 h6 8.d4 Nbd7) 6.Be2 Bf5 7.f4 Qa5 8.a4 Nd7; 5.Qf3 e6 (5...Nd7 6.Nc3 Nc3 7.Bc3 Nf6 8.Bf6 ef6; 5...h6 6.Be2 e6 7.Nh3 a6 8.a4 ab5; 5...a6 6.Ne2 e6 7.Ng3 Nd6 8.Nh5 Qg5; 5...h5 6.h3 Rh6 7.Qd1 Nd7 8.Nf3 e5) 6.Nc3 Nf6 7.Be2 e5 8.Nh3 Qd6) 5...f6 (5...e6 6.Be2 Be7 7.0-0 0-0 8.d3 Bf6; 5...c4 6.Nc3 Nc3 7.Bc3 a6 8.ba6 Na6; 5...Bg4 6.Be2 e6 7.0-0 a6 8.a4 ab5; 5...a6 6.Nc3 Nc3 7.Bc3 f6 8.d4 e6) 6.Nh4 (6.Be2 e5 7.0-0 Be6 8.d4 ed4) 6...Be6 (6...g6 7.Be2 Qa5 8.Nf3 e5) 7.c4 (7.Be2!?= Qa5 8.Nc3 Nc3) 7...dc4+= 8.Na3 c3 (8...Nd6 9.Rc1 Qa5 10.Qh5 Bf7 11.Qc5-/+; 8...g5+=) 9.Bc3= Nc3 10.dc3 Qd1 (10...Qa5 11.Qc1=) 11.Kd1 Nd7 (11...a6 12.e4=) 12.Bd3 (12.Bc4 Bg8=) 12...0-0-0 13.Ke2 (13.Kc2 Bd5+=) 13...Nb6+= Black intends c4 14.Bf5 Bf5 15.Nf5 e6 16.Ng3 c4 17.Nb1 Na4 18.Rd1 Be7 19.Rd4 Rd4 20.cd4 Kc7 (20...Kd7 21.Ne4+=) 21.Ne4 a6 22.Nbc3 Nc3 23.Nc3 Bb4 24.Ne4 ab5 25.Rb1 Ba3 (25...Be7 26.Rb5 Ra8 27.Nc3=) 26.Rb5= Ra8 27.Nc3 Kc6 (27...Ra6 28.e4=) 28.Kd2 (28.e4 Rc8=) 28...Ra6 (28...Ra4! 29.e4 Bb4 30.d5 ed5 31.ed5 Kc7-/+) 29.e4= Bd6 30.a4 b6 (30...Bf4 31.Ke2 Bd6 32.d5 ed5 33.ed5 Kc7 34.Ke3=) 31.Ke3 e5 32.d5 Kd7 33.a5 (better is 33.Kd2!?=) 33...Ra5 (33...Bc5 34.Kd2 Ra5 35.Ra5 ba5 36.f3-/+) 34.Ra5 ba5 35.Na4 Kc7 36.Nb2 Bc5 37.Kd2 Kb6 (37...Bf2!? 38.Nc4 a4-/+) 38.Nc4+= Kb5 39.Ne3 a4 40.Kc3 h5 41.h3 Bd4 42.Kc2 Be3 43.fe3 h4 44.Kb2 g6 45.Ka3 f5 46.ef5 gf5 47.d6 Kc6 48.Ka4 Kd6 49.Kb4 Kd5 50.Kc3 Ke4 51.Kd2 f4 52.ef4 Kf4 53.Ke2 Kg3 54.Kf1 e4 55.Kg1 e3 56.Kf1 Kf4 0–1. Cwiertnia,A – Martyniak,J, corr Poland–ch3, 1961.

4.e3 e6 A) 5.Be2 Bd6 (5...Nbd7 6.f4 c4 7.Nf3 a6 8.ba6 ba6) 6.Nf3 Nbd7 7.c4 0-0 8.d4 cd4; B) 5.f4 Be7 (5...Bd6 6.Nf3 0-0 7.Be2 a6 8.a4 Re8; 5...a6 6.Nf3 c4 7.ba6 Na6 8.Be2 Bc5; 5...Bd7 6.Nf3 c4 7.Nc3 Bb4 8.Rb1 0-0; 5...c4 6.Nf3 Bd7 7.Nc3 Bb4 8.Rb1 0-0) 6.Nf3 0-0 7.Be2 a6 8.a4 ab5; C) 5.Nf3= Nbd7 (5...Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5); 5...a6 6.ba6 ba6 7.Be2 Bd6 8.Na3 c4) 6.c4 Bd6 7.Be2 0-0 8.d3 a6.

4.Nf3 Nbd7 5.e3= e6 6.c4 Bd6=+ 7.Be2 0-0 8.0-0 b6 9.Nc3= (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.Nc3).

4.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.b5 c5).

4.g3 a6 5.e3=+.

4.g3 d4 5.Nf3 Nbd7 6.Bg2 e5 7.Na3 (7.0-0 a6=+) 7...e4 8.Ng5 Qe7 9.0-0 h6 10.Nh3 Nb6 (10...h5 11.c3 h4 12.cd4 cd4 13.Nf4=+) 11.c3 Qd8 (11...h5 12.f3=+) 12.cd4= cd4 13.d3 Bf5 (13...Ba3!? 14.Ba3 Nbd5=) 14.Nc2+= ed3 (14...Qd7 15.Nf4 Qb5 16.Qb1+- (16.Nd4?! Qb2 17.Nf5 g6=)) 15.ed3+- Qd7 16.Re1 (16.Nf4 Bc5 17.Qe2 Kd8+-) 16...Be7 (16...Kd8 17.Nf4 Bg4 18.Ne2+=) 17.Qe2 (17.Nf4 0-0 18.Nd4 Bg4+-) 17...Bg4? (better 17...Nbd5!? 18.Bd4 0-0+=) 18.f3+- Be6 19.Nf4 0-0 (19...Na4!? 20.Bd4 Rc8 21.Ne6 fe6+-) 20.Ne6+- fe6 21.Qe6 (21.Nd4?! Bc5 22.Qe5 Na4+=) 21...Qe6 22.Re6 Rae8 (22...Bc5 23.f4+-) 23.Rae1 (23.Rae1 Bc5 24.Re8 (24.Nd4 Re6 25.Re6 Rd8-/+) 24...Re8 25.Re8 (25.Bd4 Re1 26.Ne1 Bd4 27.Kf1 g5-/+) 25...Ne8 26.Bd4 Bd4 27.Nd4+-; 23.Nd4?! Na4 24.Re7 Re7+-) 1–0. GuestYRGC – GuestQGZZ, freechess.org, 2018.

5.e3 e5 6.ed4 ed4 7.Bc4 Be7 (7...Bg4 8.Ne2=+) 8.Nf3= 0-0 9.0-0 Bg4 10.c3 d3 11.h3 Bh5 (11...Bf5 12.Re1=) 12.Re1+= Bg6 (12...a6!?+=) 13.Ne5+/- Bd6 14.Ng6 hg6 15.Qf3 (15.Bd3 Bh2 16.Kh2 Qd3+/-) 15...Nbd7 16.Bd3 (better 16.Qd3!? Ne5 17.Qf1+/-) 16...Ne5=+ 17.Qe2?? (better 17.Re5 Be5 18.Be2=+) 17...Nd3-+ 18.Rd1 (18.Rf1 Re8 19.Qf3 Nb2 20.Qb7 c4-+) 18...Nb2 19.Rf1 Nd3! 20.Na3 (20.Qd3 Bh2 Double attack) 20...Nf4 (better 20...Re8!? 21.Qf3 Re4 22.Nc2-+) 21.Qf3 Bb8 (21...Qd7 22.Nc4-+) 22.Nc4 (22.Qb7 Bc7-+) 22...Qd5 23.Ne3 (23.Qd5 N6d5 24.Na5 b6-+) 23...Qf3 24.gf3 Ne2 (24...Nh3 25.Kh1-+) 25.Kg2 Rd8 26.h4 (26.Rfd1 Nf4 27.Kf1 Rd3-+) 26...Nf4 27.Kg1 N6h5 (27...Rd2 28.Rad1 Ra2 29.Rd8 Kh7 30.Rf8 Ne2 31.Kg2 Nc3 32.Rc1 Na4 33.Rd1-+) 28.Rad1 (28.Rfd1 Nd3-+) 28...Be5 29.Ng4 Bf6 30.c4 (30.Nf6 Nf6 31.Rfe1 Rd7-+) 30...Bh4 31.Rfe1 (31.Kh2 Rd4-+) 31...Bf6 (better 31...Nd3!? 32.Re4-+) 32.Re4 Bd4 33.Ne3 (33.Re7 Rab8 34.b6 ab6-+) 33...Be3 (33...Kf8!? 34.Kf1-+) 34.fe3 (34.Re3 Rd7-+) 34...Ne6 (better 34...Ne2!? 35.Kf2 Nc3 36.Re8 Re8 37.dc3-+) 35.Re5 b6 (35...Nf6 36.d3-+) 36.f4 (36.Rd5 Nf6 37.Rd8 Rd8-+) 36...Nf6 37.Kf2 (37.Kf1 Rd3-+) 37...Ng4 38.Kf3 (38.Ke2 Ne5 39.fe5 a6 40.ba6 Ra6-+) 38...Ne5 39.fe5 Nc7 (better 39...Rd3 40.a5-+) 40.d4 Re8 (40...cd4 41.ed4 Rac8 42.d5-+) 41.Ke4 White intends d5 (41.Rg1 Rac8 42.Ke4 cd4 43.ed4 Ne6-+) 41...Ne6 (41...Rad8 42.d5-+) 42.d5 Nc7 (42...Nf8 43.Rd2-+) 43.Kf4 (43.a5-+) 43...Ne6 44.de6?? (44.Ke4 Nf8 45.Rb1-+) 44...Re6-+ 45.Rd7 Rae8 46.Ra7 (46.Rd5 f6 47.Rd3 Re5-+) 46...Re5 47.a5 (47.Kg3 Re3 48.Kf2 Re2 49.Kf1 Rb2-+) 47...ba5 (47...Re3 48.Ra8 g5 49.Kg5 Ra8 50.Kg4 g6 51.Kg5 Rae8 52.ab6 R8e5 53.Kg4 f6 54.b7 R5e4) 48.b6 (48.Kg3 Re3 49.Kf2 Re2 50.Kf1 R8e4 51.Ra5 Rb2-+) 48...R5e6 (better 48...Re3 49.Ra8 g5 50.Kg4 R3e4 51.Kf3 g4 52.Kg3 Ra8 53.b7 Rb8 54.Kg2 Rb7 55.Kf2 Rb2 56.Kg3 f6 57.Kh4 Rb3 58.Kh5 Kf7 59.Kh4 Rh3) 49.b7 Rb6 (better 49...Re3!? 50.b8Q g5 51.Kg5 Rb8 52.Ra5-+) 50.Ra8 Kf8 51.Ra5 Rb7 52.Rc5 Rbe7 53.Rd5 Re3 54.Rd4 R3e4! 55.Re4 Re4 56.Ke4 Ke7 57.Kd5 Kd7 58.Kc5 Kc7 59.Kd5 f5 60.Kd4 Kc6 61.Ke5 Kc5 62.Kf4 Kc4 63.Kg5 Kd5 64.Kf4 Ke6 65.Kf3 Kf6 66.Kg3 g5 67.Kf3 g4 68.Kf2 g5 69.Kg2 Ke5 70.Kf2 f4 71.Kf1 Kf5 72.Kf2 g3 73.Kf1 g4 74.Kg1 f3 75.Kf1 Ke4 76.Ke1 Black now must not overlook the idea g2 76...Ke3 Black prepares the advance f2 77.Kd1 f2 78.Kc2 (78.Kc1 f1Q 79.Kb2 Qc4 80.Ka3 g2 81.Kb2 g1Q 82.Ka3 Qgc1) 78...f1Q 79.Kc3 (79.Kb3 Qb5 80.Kc2 g2 81.Kc3 g1Q 82.Kc2 Qd3 83.Kb2 Qgb1) 79...Qd3 80.Kb4 g2 81.Kc5 g1Q 82.Kb6 Qc1 83.Kb7 (83.Ka5 Qc5 84.Ka4 Qcb5) 83...Qdb1 84.Ka7 (84.Ka6 Qa3) 84…Qa3 0-1. BeepBeepImAJeep (2620) - Fide15 (2220), lichess.org, 2018.

5.e3 e5 6.Nf3 Bd6 7.ed4 ed4 8.Bc4 0-0 9.0-0 Bg4 10.h3 Bh5 11.Be2 Re8 (better 11...Bg6=+) 12.d3?? (12.Nd4 Be2 13.Ne2 Nbd7+=) 12...Nbd7?? (12...Qe7 13.Nd4 cd4 14.Bh5 Qe5 (worse 14...Nh5 15.Qh5 Be5 16.Nd2+/-) 15.Bf7 Kf7-+) 13.Re1 (13.Nd4!? Be2 14.Ne2+=) 13...Qc7 14.Nfd2 (14.c3 Bf3 15.Bf3 Re1 16.Qe1 Ne5=+) 14...Re2 15.Re2 Be2 16.Qe2 Re8 17.Qf1 Bf4 18.Nc4 h5 (18...Ne5!?-/+) 19.Nbd2 Nd5 20.Re1 Re1 21.Qe1 N7f6 22.Ne4 Qd7?? (22...Ne4 23.Qe4 Qd7 24.a5=) 23.Nf6?? (better 23.Nc5 Qc7 24.Bd4+-) 23...Nf6= 24.Na5 b6 25.Nc6 Bd6 26.Qe2 h4 27.Bc1 Qf5 (better 27...a6!?=) 28.Na7+/- Nd5 29.Nc6 Nf4 (better 29...Nc3 30.Qe7!? Qe6 31.Qd8 Bf8+/-) 30.Qe4?? (better 30.Qe7! Qh5 31.Qd6 Qd1 32.Kh2+-) 30...Qe4-+ 31.de4 Ne2 32.Kf1 Nc1 33.f3 (33.a5 ba5 34.b6-+) 33...Na2 34.a5 (34.e5 Bc7 35.Ne7 Kh7-+) 34...ba5 35.Na5 Bc7 (35...Nb4 36.Nc4 Bf4 37.b6 Nc2 38.e5-+) 36.Nc4 Nb4 37.b6 Bb8 38.Na3 Kf8 39.Ke2 Ke7 40.Kd2 (40.Nc4 Nc2 41.Kd2 Nb4-+) 40...Kd6 (better 40...Bf4 41.Kd1 Kd7 42.Nc4-+) 41.c3 dc3 42.Kc3 Kc6 43.Nc4 f6 44.Kb3 (44.Kd2 Kb5 45.Kc3 Nc6-+) 44...Nd3 45.Ne3 Ne5 (45...Kb6 46.Kc3 Nf4 47.Kc4-+) 46.Nf5 g5 47.Kc3 (47.f4 Ng6 48.e5 fe5 49.fg5 e4-+) 47...Kb6 48.Ne3 (48.f4 Ng6 49.fg5 fg5-+) 48...Kc6 (48...Kb5 49.Kc2-+) 49.Nd5 Nd7 50.Ne7 (50.Kb3 Be5-+) 50...Kd6 (50...Kb5!? 51.Kc2-+) 51.Nf5 Ke6 52.Kc4 Be5 53.Ne3 (53.Ng7 Kd6-+) 53...Bd4 54.Nf5 Ne5 55.Kb5 Ng6 56.Ng7 (56.Kc4 Nf4 57.g3 hg3 58.Ng3 Nh3-+) 56...Ke5 57.Nh5 (57.Nf5 Nf4 58.g3 hg3 59.Ng3 Nh3-+) 57...Nf4 58.Ng7 Ng2 59.Nf5 Nf4 60.Ne7 Nh3 61.Nc6 Ke6 62.Kc4 Nf4 63.Nd8 Kd7 64.Nc6 h3 (64...Kc6 65.Kb3 h3 66.Ka2 h2 67.Ka3 h1Q 68.Ka2 Qg2 69.Kb3 Qb2 70.Kc4 Qc3) 65.Kb3 Kc6 66.Kc4 (66.Ka3 h2 67.e5 h1Q 68.ef6 Qa1 69.Kb3 Qc3 70.Ka4 Qb4) 66...h2 67.Kb3 h1Q 68.Kc4 (68.e5 Qb1 69.Ka3 Qb4 70.Ka2 Qb2) 68...Qc1 (68...Qb1 69.e5 Qd3) 69.Kb3 Qc3 70.Ka4 Qb4 0-1. BeepBeepImAJeep (2750) - shrekdavid (2835), lichess.org, 2020.

5.e3 b6?? 6.Bf6+- ef6 (better 6...a6 7.Bb2 ab5+-) 7.Qf3 (7.Bc4?! Bb7 8.Nf3 Bd6=) 7...Qc7 (7...Nc6 8.bc6 Be6+-) 8.Qa8 Bb7 (8...Bd6 9.Nf3+- (9.Bc4?! Bb7 10.Qa7 Bg2 11.Qc7 Bc7+-)) 9.Qa7 Bd6 10.a4 (better 10.f4!? 0-0+-) 10...0-0 (10...Nd7 11.a5 (11.Bc4?! Qc8=) 11...0-0 12.ab6 (12.Bc4?! Ra8 13.ab6 Nb6+=) 12...Nb6 13.Qa2+-) 11.a5 (11.Bc4?! Bg2 12.Qc7 Bc7+-) 11...Nd7 12.ab6 (12.Bc4?! Ra8 13.ab6 Nb6+=) 12...Nb6 13.Qa2 Be5 14.Nc3 1–0. onur604 (2315) – boris13 (2075), lichess.org, 2020.

5.e3 Qd5 6.Nc3= Qg5 (6...Qe6 7.Rc1=) 7.Nf3+= Qg6 (7...Qh5 8.Bc4 Bg4 9.h3+=) 8.Ne5 Qf5 (8...Qh6 9.Qa4 Nfd7 10.Nc4+-) 9.f4+- Be6 (9...Ng4!? 10.Nd5 Kd8+-) 10.Qf3+- (10.Bc4?! Bc4 11.Nc4 Nbd7+=; 10.Nc4?! Nbd7+=) 10...Nbd7 11.Qb7 Rb8 (11...Nb6 12.a4 Qc2 13.Bc1+-) 12.Qa7 g6?? (12...Qc2 13.Ba3 Ne4 14.Ne4 Qe4 15.Nd7 Rb7 16.Nc5 Ra7 17.Ne4 Ra3+-) 13.Nc6 Rc8 14.Qb7 Nb6 15.Qb6 Bd7 (15...Qc2 16.Nd1+-) 16.Ne5 Bg7 (16...Be6 17.Bc4 Bc4 18.Nc4+-) 17.Bc4 0-0 18.0-0 (18.a4 Qh5+-) 18...Qc2 (18...Ng4 19.Nd5 Rfe8 20.Nc7+-) 19.Nd5 (better 19.Bc1 Qf5+-) 19...Nd5 20.Bd5 Rb8 (20...Qb2 21.Nd7 Qd2 22.Rad1 Qe3 23.Kh1+-) 21.Bf7 Rf7 (21...Kh8 22.Qc7 Bb5+-) 22.Qb8 Rf8 23.Qc7 (23.Qb6 Qb2 24.Nd7 Re8+-) 23...Qb2 (23...Bb5 24.Rfb1 Qd2 25.Qc5+-) 24.Qd7 Be5 25.Qe6 Rf7 (25...Kh8 26.fe5 Re8+-) 26.fe5 (26.fe5 Qa2 27.Ra2 Kg7 28.Rf7 Kh6 29.Qh3 Kg5 30.Qg3 Kh5 31.Rh7) 1–0. onur604 (2235) – Viktor_444 (1780), lichess.org, 2020.

5.e3 e5 6.Nf3 Bd6 7.ed4 ed4 8.Bd3 0-0 9.0-0 Bg4 10.h3 Bh5 11.Re1 Nbd7 12.g4 Bg6 13.Bg6 fg6 14.d3 Qc7 15.Nbd2 Ne5 16.Ne5 Be5 17.Nf3 Nd7 18.Re4 Rf7 19.Ne5 Ne5 20.f4 Nd7 21.Qf3 Raf8 22.Bc1 Ne5 (22...g5 23.f5 g6 24.Bg5 gf5 25.gf5 Rg7=+ (25...Rf5?! 26.Rg4 Rf3 27.Bf4 Kh8 28.Bc7-+)) 23.Qe2 Nd7 24.Kg2 g5 25.f5 (25.fg5 Rf2 26.Qf2 Rf2 27.Kf2 Qh2 28.Ke1 Qg3 29.Kd2 Ne5 (29...Qh3?! 30.g6-/+) 30.Re5 Qe5-+) 25...Nf6 (25...h6 26.Bd2=) 26.Re6 h6 27.Bd2 Kh7 28.a4 Qc8 29.a5 Re8 30.Re1 Re6 31.fe6 Re7 32.Qe5 Qc7 (better 32...Ne8!?+=) 33.Qc7+/- Rc7 34.e7 (34.Bc1 b6 35.Kf3 Re7=) 34...Ne8 35.Bc1 Kg6 36.Ba3 b6 (36...Kf7!? 37.b6 ab6 38.ab6 Rc6+/-) 37.ab6+- ab6 38.Re6 Kf7 39.Rb6 Re7 (39...Ke7 40.Rg6 Rc8 41.b6+-) 40.Bc5 (40.Bc5 Re2 41.Kg1 Re1 42.Kf2+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.Nf3 Nbd7 6.g3=.

5.Nf3 Bg4 6.Ne5 (6.e3 Nbd7 7.h3 Bf3 8.Qf3 Qb6=) 6...Be6 (6...Bf5!?=+) 7.e3= de3 8.fe3 Nbd7 9.Nd7 Qd7 (worse 9...Kd7 10.Be2+-; worse 9...Nd7 10.Be2+=) 10.Be2 Bf5 (10...g6 11.Nc3=) 11.0-0= e6 (11...h5 12.Bf6 ef6 13.Nc3=) 12.d3 Be7 (better 12...h5!?=) 13.g4+- Bg6 (13...Ng4!? 14.Bg4 Bd3+-) 14.g5+- Ng8? (better 14...Rg8 15.gf6 gf6+-) 15.Bg7 1–0. DEFFM – GuestSCRC, freechess.org, 2019.

5.Nf3 g6 6.e3= Bg7 7.ed4 cd4 (7...Nh5!?=) 8.Bd4+= (8.Nd4? Nh5-+) 8...Bg4 9.Bb2 0-0 10.Be2 Qc7 11.0-0 (11.d4 a6 12.ba6 ba6+-) 11...Nbd7 (better 11...Bf3 12.Bf3 Ng4 13.Bg4 Bb2=) 12.d4+- Bf3 13.Bf3 (13.gf3?! e5=) 13...Qc4 14.Bb7 Qb5 15.Qb3 (15.Ba8 Qb2 16.Nc3 Ra8-+) 15...Qb3 (15...Qf5 16.Ba8 Ra8 17.Nd2+-) 16.ab3 Rab8 17.Ra7 Rfd8 18.Nd2 (18.Bc1 e5 19.b4 Bf8+-) 18...Nf8 19.Bc6 Ne6 20.Re7 Nd4 21.Bd4 Rd4 22.Nf3 Rd6 23.Ba4 Nd5 24.Ra7 Nc3 25.Re1 Na4 26.ba4 (26.Ra4?! Bc3 27.Rc1 Rb3=) 26...Rd3 (26...Bc3 27.Rc1+-) 27.a5 (27.h3!?+-) 27...Ra3+- 28.a6 (28.h3 Bc3 29.Ree7 Ra5 30.Rf7 Ra7 31.Ra7 h6+-) 28...h5 (28...Rb6 29.Ng5 Rba6 30.Rd7+=) 29.Ng5 (29.h4 Ra2+-) 29...Bd4 30.Rf7 Ra6 31.Rd7 Bc3 32.Red1 Ra2 33.f4 (33.g3 Rba8+-) 33...Bf6 34.R7d6 (better 34.Ne4!? Bg7 35.h3+-) 34...Rbb2= 35.Rf6 Rg2 36.Kf1 Raf2 37.Ke1 Re2 38.Kf1 Ref2 39.Ke1 Re2 40.Kf1 Ref2 41.Ke1 ½–½. onur604 (2265) – throbi (2110), lichess.org, 2020.

5.e3 e5 6.Nc3 Bd6 7.d4 (7.Nb5 Be7-/+) 7...e4 (7...ed4 8.ed4 0-0 9.Bd3-/+) 8.Be2 0-0 9.f3 a6 10.fe4 de4 11.Bc4 (better 11.Qd2!?-/+) 11...Ng4-+ 12.Nge2?? (12.Qe2 Qh4 13.g3 Bg3 14.hg3 Qh1 15.0-0-0-+) 12...Ne3 13.Qd2 (13.Qc1 Nc4 14.d5 Na7-+) 13...Ng2 (better 13...Nc4 14.Qc1 Re8-+) 14.Kd1 e3 15.Qd3 Nf4 (15...Bh3 16.Qe4-+) 16.Qe4 (16.Qe3 Na5 17.Bd3 Nd3 18.cd3 Bg4-+) 16...Ne2 (16...Re8!? 17.Qf3 Qb6 18.Bf7 Kf7 19.Nf4 Bf4 20.Qf4 Kg8 21.Kc1 Qd4 22.Qd4 Nd4 23.Nd5 Ne2 24.Kb1-+) 17.Ne2 Qf6 (17...Re8 18.Qf3 Be6 19.Be6 Re6 20.Kc1-+) 18.Rg1 (18.Bd3 Qh6 19.Bc1 Nb4-+) 18...g6 (better 18...Qe7 19.Qg2 g6-+) 19.d5?? (better 19.Qe3 Bf5 20.Bd3-+) 19...Qb2 20.Nd4 (20.Rc1 Qe5 21.Ng3-+) 20...Qa1 21.Ke2 Nd4 22.Qd4 Qd4 (22...Qd4 23.Rg5 Qd2 24.Kf3 Qf2 25.Ke4 Re8 26.Kd4 Qc2 27.Rg6 hg6 28.Ba6 Re4) 0–1. anotherheaven – SUPERPRIME (1770), lichess.org, 2015.

5.e3 e5 6.Nf3 Bd6 7.Be2 0-0 8.c4 (8.0-0 Bf5=+) 8...Be6 (8...dc4 9.Bc4 e4-/+) 9.Qc2? (9.c5 Bc5 10.Ne5 Ne5 11.Be5 Nd7=+) 9...Rc8 (9...dc4 10.a3 b5-+) 10.cd5? (10.d3 Nb4 11.Qd1 dc4 12.dc4 Bc4 13.Bc4 Rc4-+) 10...Nd5 (10...Nb4 11.Qa4 Bd7 12.Qb3 Nc2 13.Kd1 Na1 14.Ba1-+) 11.0-0 (11.Nc3!?-/+) 11...Nd4-+ 12.Qa4?? (12.Qd1 Nc2 13.Ne5 Re8-+) 12...Nc2 (better 12...Ne2 13.Kh1 Nb6-+) 13.Nc3 (13.Ne5 Qc7 14.Nf3 Nb6-/+) 13...Na1-+ 14.Ba1 Nc3 15.Bc3 Bb8 16.Rd1 (16.Rb1 Bd7 17.Qe4 Bc6-+) 16...f6 17.h3 (17.Bb4 Rf7-+) 17...Qd5 18.a3 Rfd8 19.Rb1 Qa2 20.Rb7 (20.Ra1 Qb3 21.Qh4 Qc2-+) 20...Rc3! 21.Qb4 (21.dc3 Qa1 Double attack (21...Qe2 Pinning; 21...Qe2 Deflection; 21...Qa1 Decoy)) 21...Rc1 22.Kh2 (22.Bf1 Bd6 23.Qa5 Ra8-+) 22...Bd6 23.Qa5 Rcc8 (23...Ra8 24.e4-+) 24.e4 Bc5 25.Ba6 Qa3 (25...Ba3?! 26.Ra7 Ra8 27.Bc4 Qc4 28.Ra8 Ra8 29.Qa8 Bf8 30.Qb7-+) 26.Qb5 (26.Qa3 Ba3 27.Ra7 Ra8 28.Ra8 Ra8-+) 26...Bb6 (26...Bf2 27.Qf1 Bb6 28.Rb6 ab6 29.Bc8 Rc8 30.Qb5-+) 27.Qe2 (27.Rb6 ab6 28.Bc8 Bc8 29.Qb6 Qd6-+) 27...Bf2! 28.Bd3 (28.Qf2 Qa6 Deflection (28...Qa6 Overloading)) 28...Bb6 29.Ba6 Rc7 (better 29...Rc1!? 30.Bb5-+) 30.Rc7 Bc7 31.Nh4 (31.Bc4 Qd6-+) 31...Bb6 32.Bc4 Qe7 33.Nf5 Qf7 (better 33...Qd7 34.Be6 Qe6 35.Qg4-+) 34.Ba6 (34.Qg4 Bc4 35.Nh6 Kh8 36.Nf7 Bf7 37.Qe2-+) 34...Bf5 35.ef5 Qd7 36.Bc4 Kh8 37.d3 Qf5 38.Qc2 (38.g3 Bd4 39.Qe4 Qe4 40.de4 Rc8-+) 38...Qf4 (better 38...Qf1 39.d4 Qf4 40.Kh1 Qd4-+) 39.Kh1 (39.g3 Qd4 40.Qg2-+) 39...Qf1 40.Kh2 Bg1 41.Kg3 (41.Kh1 Bf2 42.Kh2 Qg1) 41…Qf4 0-1. Antares_Sco (2020) - YouralterEgo (2335), Hourly Classical Arena, lichess.org, 2016.

5.ed4+= cd4 6.Nf3 Qb6 7.Bd4+/– Qb5?? (better is 7...Qd8+/–) 8.Bb5+- Nc6 (8...Nbd7 9.Bd7 Bd7 10.Ne5+-) 9.Ne5 Bd7 10.Qf3 Nd5 11.Qf7 Kd8 12.Qd5 Ne5 (12...Nb8 13.Nd7 e6 14.Qb7 Bd6 15.Nb8 Bc7 16.Be5 Ke7 17.Qc7 Kf8 18.Qg7) 13.Be5 e6 (13...Ke8 14.Bd7 Kd8 15.Be6 Ke8 16.Qd7) 14.Qd7 1–0. b4_player – Cidras, gamecolony.com, 2007.

5.ed4 cd4 6.Nf3 Bg4 7.Be2+- Qd5 8.0-0 e5 (8...Nbd7 9.a4+-) 9.c4 (better 9.Ne5 Bf5 10.Re1 Qe5 11.Bf3+-) 9...Qe4? (better 9...Qd6!? 10.Ne5! Bf5+-) 10.d3 Qf5 11.Nd4?? (better 11.Ne5 Qe5 12.Bg4+-) 11...ed4= 12.Re1 (better 12.f3 Bh5 13.g4=) 12...Be7?? (better 12...Be2 13.Qe2 Kd8 14.Bd4 Bd6=+) 13.Ba3+- 0-0 14.Be7 Be2 15.Re2 Re8 16.Bf6 Re2 17.Qe2 gf6 18.Nd2 Nd7 19.Re1 (19.Ne4 Qe6+-) 19...Ne5 (19...a6 20.ba6 Ra6 21.Ne4+-) 20.Ne4 a6 (20...Kg7 21.c5+-) 21.Nf6! Qf6 22.Qe5 Qe5 23.Re5 ab5 24.Rb5 Ra2 25.Kf1 Rd2 (25...Ra3 26.Rb7 Rd3 27.Rd7+-) 26.Rb3 Kg7 (26...f5 27.Ke1 Ra2 28.Rb7+-) 27.Ke1 (better 27.g4 Rc2 28.Rb7+-) 27...Rc2? (27...Ra2 28.g4 Ra7 29.Ke2+-) 28.Rb7 Kf6 (28...Rc1 29.Kd2 Rh1+-) 29.Rd7 Rc1 (29...Kg6 30.Rd4 f5 31.Rd6 Kh5 32.Re6+-) 30.Kd2 (30.Ke2 Kg6+-) 30...Rf1 (30...Rh1 31.Rd6 Ke5 32.Rd5 Kf6 33.Rd4 Rh2 34.Rf4 Ke6 35.g3+-) 31.Ke2 Rg1 (31...Ra1 32.Rd4 Ra5 33.Rf4 Ke7 34.d4+-) 32.Kf3 Rh1 33.h3 Rd1 (33...Rc1 34.Rd4 h6 35.Rd5+-) 34.Rd4 Ke5 (34...h6 35.Rd6 Ke7 36.c5+-) 35.Rd5 Ke6 36.Ke2 Rg1 (36...Rb1 37.Rh5+-) 37.g4 Rh1 (37...Kf6 38.Rh5+-) 38.Rh5 Ra1 (38...f6 39.Rh7 Kd6 40.Rh6+-) 39.Rh7 Kf6 (39...f6 40.f4+-) 40.c5 Kg6 (40...Ke6 41.d4+-) 41.Rh5 f6 (41...Kf6 42.d4+-) 42.d4 Ra3 (42...Rc1 43.Kd3 Kf7 44.Ke4+-) 43.c6 Kf7 (43...Rc3 44.Rc5 Rh3 45.c7+-) 44.Rh8 Rc3 45.c7! 1–0. DEFFM – GuestKSZD, freechess.org, 2018.

5.ed4+= cd4 6.Nf3 Bg4!? 7.h3 Bf3 8.Qf3 Qb6+=.

5.a4 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 =.

5.a4 a6 6.c4 dc4 7.Bc4 ab5 8.ab5 Ra1 9.Ba1 e6 (9...Bg4 10.Nf3 e6 11.h3=) 10.Nf3 (10.Qf3 b6=) 10...Be7 11.Nc3 0-0 12.0-0 b6 (12...Nd5 13.d4+=) 13.Ne5 Qc7 14.f4 Bc8 15.Be2 Bb7= 16.Bf3 Nbd7 17.Bb7 Qb7 18.Nc6 Bd8 19.Qf3+= Nb8 20.Ne4 Nd5 21.Qg4 f5 22.Nd8 Rd8= 23.Qg5 23...Qe7 24.Nc3 Qg5=+ 25.fg5 Nc3 26.Bc3 Nd7 27.Ra1 e5 28.Kf2 g6 29.d4= cd4 30.ed4 ed4 31.Bd4+= Nc5 32.Bc5 bc5 33.b6 Rd2 34.Ke3 Rb2 35.Ra8 Kf7 36.Ra7 Ke6 37.b7 Kd5 38.Kd3 Rb4 39.Kc3 Rc4 40.Kb3 Rb4= 41.Ka3 Rb1 42.Ka2+= Rb4 43.Ka3 Rb1 44.Ka2 Rb4 45.Ka1 Rb3 46.Ka2= Rb4 ½–½. Van Wensen – Rongen, Boxmeer, 1994.

5.a4 a6 6.d4 cd4 7.c4? (7.Bd4!? ab5 8.ab5 Ra1 9.Ba1=) 7...dc3 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 e6 11.Qa8 Bb4 12.Nge2? (12.Bd3!? Nc6 13.Qd8 Nd8 14.Nge2-/+) 12...0-0 13.g3? (13.Ba3 Qe7 14.Bb4 Qb4-+) 13...Qa5 14.Qa5 Ba5 15.Bg2 Bb5 16.0-0? Be2 17.Ne2 Bc7 18.Rb1 Nbd7 19.Bf6 Nf6 20.Rb7 Be5 21.f4 Bd6 22.Nd4 Bc5 23.Rc7 Bd4 24.ed4 h5 25.h3 Rd8 26.Kf2 Ne4 27.Be4 de4 28.Ke3 f5 29.g4 fg4 30.hg4 h4 31.Ke4 Kh7 32.Rc3 Kg6 33.Rh3 Rh8 34.f5 ef5 35.gf5 Kf6 36.Kf4 Rd8 37.Ke4 Rh8 38.d5 Rh5 39.d6 Rf5?? 40.d7+- Ke7 41.Kf5 Kd7 42.Kg6 Ke6 43.Kg7 1–0. MasterofDisaster – Okafor, Live Game Caissa's Web, 2004.

5.a4 a6 6.Nf3 b6 =.

5.a4 Bg4 6.Be2 Be2 7.Ne2 =.

5.c4 e6 6.Nf3 Bd6 7.Be2 e5 8.Ne5 0-0 9.0-0 Qc7 10.f4 Ne4 (better 10...a6!?+/-) 11.cd5+- 1-0. DEFFM – GuestXPDC, freechess.org, 2021.

5.d3 e6 6.g3 Be7 7.Bg2 Qa5 8.Nc3 d4 (better is 8...a6 9.ba6 Ra6+=) 9.Nge2?? (9.Bb7 dc3 10.Bc1 c4=) 9...Nbd7?? (9...dc3 10.Nc3 Qb6 11.a4-+) 10.0-0?? (better is 10.ed4 cd4 11.Nd4=) 10...dc3-+ 11.Bc3 Qc7 12.Rb1 Rd8 13.e4 Bg4 14.f3 Bh5 15.Nf4 e5 16.Nd5? Nd5 17.ed5 b6 18.g4 Bg6 19.f4 0-0?? 20.f5= Nf6 21.fg6 hg6 22.h3 Nd5 23.Bd2 c4-/+ 24.Be4 Bc5 25.Kg2 Be3 26.Bd5= Bd2 27.Qd2? Rd5-+ 28.Rf3 e4! 29.Re3 Qf4 30.d4 c3 31.Qc3+= Rfd8 32.Rf1 Qg5 33.Re4 f5 34.Ref4 fg4 35.Rg4+- Qe7 36.Re1 Qb7 37.Qc6 Qf7 38.Rg6 Qf5? 39.Qe6 Qe6+/– 40.Rge6 Rb5 41.Re8 Re8 42.Re8 Kf7 43.Ra8 a5 44.a4 Rb2 45.Rc8 Ra2 46.Rc6 Ra4 47.Rb6 Rc4 48.Rb2 Rd4 49.c3 Rc4 50.Ra2 a4 51.Kf2 Ke6 52.Ke2 Kd5 53.Kd2 Rh4 54.c4 Kc5 55.Ra4+= Rh3 (55...Rh3 56.Ra8 Kd4+=). MasterofDisaster – NightClub, Live Game Caissa's Web, 2004.

5.Be2 e6 6.Nf3 Bd6 7.Nh4 Be4 8.d3 Bg6.

5.Ne2 Nbd7 6.Ng3 Bg6 7.f4 e6 8.Be2 Bd6.

5.Ne2 e6 6.Ng3 Bg6 7.h4 h6 8.Be2 Bd6.

5.Nf3 Nbd7 6.Be2 e5 7.Ne5 Ne5 8.Be5 Bd6 9.d4 c4 10.Nc3?? (better is 10.0-0+=) 10...Bb4-+ 11.0-0 Bc3 12.Rc1 0-0 13.Bf3 Ne4 14.Be4 Be4 15.Qg4 Bg6 16.h4 Qc8 17.Qg3 Qf5 (better is 17...f6 18.Bd6 Re8-+) 18.e4-/+ Qe4 19.Qc3 Qh4 20.Rfe1 Rfe8 21.Bg3 Qf6 22.Be5 Qf5 23.a4 f6 24.Bg3 Re1 25.Qe1 Re8 26.Qa5 Qg5 (26...h5 27.Qc7-+) 27.Re1-/+ Re1 28.Qe1 Qg4 29.Qe7 Qd1 (29...h5!? 30.Qb7 Qd4-/+) 30.Kh2= Qh5 (30...Qd4?? 31.Qe6 Bf7 32.Qc8 Be8 33.Qe8) 31.Kg1 Qd1 32.Kh2 Qh5 (32...Qd4?? 33.Qe6 Bf7 34.Qc8 Be8 35.Qe8) 33.Kg1 Qd1 ½–½. Tiedemann,Joern (2125) – Ruhl,Clemens (1905), RS–Pyramide remoteschach.de, 2007.

5.Nf3 Nbd7 6.Be2 e5 7.Ne5+= Ne5 8.Be5 Be7 9.0-0 0-0 10.d4 Nd7 11.Bg4 Bg4 12.Qg4 Nf6 (12...Ne5 13.de5 Qc7 14.Qf5+=) 13.Qg5 h6 14.Qg3 Re8 (14...Qa5!? 15.a4 Rfc8+/–) 15.Nc3+- cd4 16.Bd4 Rc8 17.Rfd1 g5 (17...Bd6 18.f4 Bc5 19.Bf6 Be3 20.Qe3 Qf6 (20...Re3? 21.Bd8 Rcc3 22.Rac1+-) 21.Nd5 Re3 22.Nf6 gf6+/–) 18.Qh3+- Kh7 19.Qf5 Kg8 20.h4 Qd7 21.Qd7 Nd7 22.hg5 hg5 23.Nd5 f6 (23...Rc2 24.Ne7 Re7 25.Rdc1 Rc1 26.Rc1+-) 24.Ba7 Bc5 (24...Rc2 25.e4 Nc5 26.Bc5 Rc5 27.a4+-) 25.Bc5 Rc5 26.Kf1 (26.Rd2!? Kf7+-) 26...Re5 27.c4! Kf7 (27...Rc4 28.f4 Combination) 28.Rd4 f5 29.a4 Nf6 (29...Re4 30.Re4 fe4 31.a5+-) 30.Nf6 Kf6 31.a5 Rc8 32.a6 ba6 33.Ra6 Ke7 34.Ra7 Ke8 (34...Ke6+-) 35.Rh7 Rec5 36.b6 (36.b6 Rc4 37.b7 Rc1 38.Ke2 R8c2 39.Kf3+-) 1–0. Taulien,Christian (2110) – Kaupat,Thomas, remoteschach.de, 2006.

5.Nf3 Nbd7 6.Nh4 Be6 (6...Bg4 7.f3 Be6 8.f4=) 7.f4 (7.Be2 g6=) 7...Nb6 (7...Bg4 8.Be2 Be2 9.Qe2=) 8.Be2 Ne4 (8...d4 9.f5 Bc4 10.Na3 Be2 11.Qe2=) 9.a4 (9.0-0 Na4 10.Be5 f6=) 9...Bd7 (9...Nc4 10.Bc4 dc4 11.0-0=) 10.0-0 (10.d3 Nd6+=) 10...Nd6 11.d3 (11.Be5 e6 12.Nf3 Nbc4=) 11...Rc8 (11...e5!? 12.Nf3 ef4 13.ef4 d4+=) 12.a5+= Na8 13.c4 Nf5? (better 13...e5!? 14.Nf3 ef4 15.ef4 Nf5+=) 14.Nf5+- Bf5 15.cd5 Qd5 (better 15...Nc7 16.Nc3 Bd7+-) 16.e4 Be4 (16...Qd7 17.ef5 Qb5 18.Qc2+-) 17.de4 Qe4 (17...Qd1 18.Rd1 e6 19.Na3+-) 18.Bf3 Qb4 (18...Qe3 19.Kh1 Rd8 20.Qa4+-) 19.a6 (worse 19.Bb7 Rc7 20.Bc6 Rc6 21.bc6 f6+-) 19...Rd8 (19...ba6 20.Bc6 Rc6 21.bc6 f6 22.Bf6 Kf7+-) 20.ab7 Nb6 21.Bc6 Nd7 (21...Rd7 22.b8Q Nc8 23.Qd7) 22.Qd7! Rd7 (22...Rd7 23.b8Q) 23.b8Q 1–0. DEFFM – GuestMPHL, freechess.org, 2018.

5.Nf3 e6 6.Be2 Bg4 7.h3 Bf3 8.Bf3 a6.

5.Be2 Be2 6.Qe2 e6 7.Nf3 Be7 8.0-0 0-0.

5.Be2 Be2 6.Ne2 a6 7.ba6 Na6 8.0-0 =.

5.Be2 Be2 6.Ne2 Nbd7 7.0-0 e6 8.d3 Bd6 9.h3 Qb6 10.c4 0-0 11.Nd2 a6 12.a4 ab5 13.ab5 Be5 14.Qc2 Bb2 15.Qb2 Rfd8 16.Ra8 Ra8 17.Ra1 Ra1 18.Qa1 dc4 19.dc4 Qd6 20.Nf3 h6 21.Kf1 e5 22.Ke1 Qd3 23.Qc3 (23.Qa8 Kh7 24.Qa4 e4=+) ½–½. St_Jean,Benoit (1665) – Zednik,Martin (1640), WC.2005.P.00012, 2002.

5.Be2 Be2 6.Ne2 e6 7.0-0 Bd6 8.d3 0-0 9.Nd2 Nbd7 10.Ng3 Qb6 11.c4 Be5 12.Be5= Ne5 13.Nf3 Qd6 14.Ne5 Qe5 15.d4 ½–½. Mallmann,Bernd (1885) – Naeckel,Gerhard (2180), Saarlouis op 7th, 2004.

5.Ne2 a6 (5...Qd6 6.f3 Bd7 7.a4 a6 8.Na3 e5; 5...e6 6.f3 Bf5 7.g4 Bg6 8.Nf4 Nbd7; 5...c4 6.h3 Bh5 7.g4 Bg6 8.Nf4 e6; 5...Qb6 6.h3 Bf5 7.Nf4 Qd6 8.g4 e5) 6.h3 Bd7 7.Bf6 ef6 8.Nec3 Be6.

5.f3 Bd7 (5...Bf5 6.g4 Bc8 7.g5 Nfd7 8.f4 e5; 5...Bc8 6.f4 Bf5 7.Nf3 e6 8.Be2 a6; 5...Bh5 6.g4 Bg6 7.h4 h6 8.Ne2 e6) 6.g4 e6 7.g5 Ng8 8.f4 c4.

5.Nf3 Nbd7 6.c4 e6 7.Be2 Bd6 8.0-0 0-0 9.cd5 ed5 10.d4 b6 11.Nbd2 Re8 12.h3 Bh5 13.Re1 Rc8 14.a4 c4 15.Bc3 Qc7 16.Qc2 Ne4 17.Ne4 de4 18.Nd2 Be2 19.Re2 f5 20.f4 Nf6=+ 21.Rc1 Nd5 22.g3 Qe7 23.Qa2= Kf8 (better is 23...Ba3!? 24.Bb2 Bb2 25.Qb2 c3=+) ½–½. Arnold,Ingo – Wenner,Heinz, Bergisch Gladbach–ch, 1994.

5.Nf3 e6 6.h3 Bh5 7.g4 Bg6 8.Ne5 Nbd7.

5.e3 b6 6.c4 Bf5 (6...Bg7 7.cd5 0-0 8.Bc4=) 7.Ne5 (7.cd5 Bg7+=) 7...dc4 (7...Bg7 8.Be2=) 8.Bc4+= Qd6?? (better is 8...e6+=) 9.Nf7+- Kd7 (9...Qd7 10.Nh8 Bg7+-) 10.Nd6 Kd6 11.Qf3 a6 12.Qa8 Nbd7 13.Qc6 1–0. Taulien,Christian – Mahlow,Cerstin, remoteschach.de, 2001.

5.e3 Bg7 6.c4 dc4 7.Bc4 0-0 8.0-0 Bg4 9.d4 (9.h3 Bf5=) 9...cd4 (9...Nbd7 10.h3 Bf5 11.Qe2=) 10.Bd4 Qc7 (10...a6 11.ba6 Na6 12.Nbd2+=) 11.Nbd2+= Nbd7 12.Rc1 Qb8 (12...Qd6 13.h3 Be6 14.e4+-) 13.h3+- Bf3 14.Qf3 (worse 14.gf3 e5 15.Bb2 Nb6=) 14...e5 15.Bb2 (15.Bc3 Rd8+-) 15...Nb6 (15...a6 16.Ba3 Rd8 17.Be7+=) 16.Bb3 Ne8 (better 16...a6!?+-) 17.Ba3+- Nd6 18.Rfd1 Nb5 (18...a5 19.Ne4 Ne4 20.Bf8+-) 19.Bf8 (19.Bf8 Qf8 20.Ne4+- (worse 20.Qb7 Nd6 21.Qc7 Ne8+-)) 1–0. DEFFM – GuestBVFF, freechess.org, 2019.

4.a4 Qb6 5.e3 a6 6.c4 e6 7.d3 Bb4 8.Nc3 (8.Nd2 c5=) 8...dc4 9.dc4 Ne4 (9...0-0 10.Qb3 Qa5 11.f3=+) 10.Qb3 (better is 10.Qc2!? f5 11.Bd3 ab5 12.Be4 (12.ab5?? Ra1 13.Ba1 Qa5–+) 12...fe4 13.Nge2=+) 10...Qa5-/+ 11.Rc1 0-0 (11...Nc5 12.Qc2-/+) 12.Nf3 (12.Qc2 Nc5-/+) 12...cb5 (12...Nd7 13.Qc2 Ndc5 14.Ke2 Nc3 15.Bc3 Bc3 16.Ng5–+) 13.cb5 (13.ab5 Nd7 14.Qc2-/+) 13...ab5 (better is 13...Nd7!? 14.Qc2 Ndc5-/+) 14.Bb5= (14.ab5 Bd7 15.Ne5 Rc8–+) 14...Nc6 15.0-0 Nc3 16.Bc3 Bc3 (16...Rd8 17.Bb4 Qb4 18.Qb4 Nb4 19.Rfd1+/–) 17.Qc3 (17.Rc3 Rd8+=) 17...Nb4 (17...Qc3 18.Rc3 f6 19.Ra1+=) 18.Qb3 (18.Ne5 Nd5 19.Qa5 Ra5+/–) 18...Nd5 (18...Nc6 19.Rc5+=) 19.Rc2 (19.Rfd1 Nc7+/–) 19...b6 (19...Rd8 20.e4 Nb4 21.Rc5+/–) 20.Rfc1 (20.e4 Nb4 21.Rb2 Na6+=) 20...Ba6 (20...Bb7 21.Ne5+=) 21.e4 (21.Ne5!? Bb5 22.ab5+= (< 22.Qb5 Qa4 23.Qb1 f6=+)) 21...Bb5 22.ab5 Nf4 23.Ne5 Qa4? 24.Qa4+- Ra4 25.Nd7 Rd4 26.Nf8+- Kf8 27.Rc8 Ke7 28.e5?? Ne2= 29.Kf1 Nc1 30.Rc1 Kd7 31.Rc6 Rd5 32.Rb6 Re5 33.Rb7 Ke8 34.b6 h6 35.Rc7+/– Rb5?? 36.b7+- Rb1 37.Ke2 g5 38.Rc8 Kd7 39.b8Q Rb8 40.Rb8 Ke7 41.Rb7 Kf6 42.Ke3 Kg6 43.g3 f5 44.h3 h5 45.Rb5 Kf6 46.Rb6 Ke7 47.f3 Kf6 48.Kd4 Ke7 49.Ke5 h4 50.Re6 Kd7 51.gh4 gh4 52.Kf5 Kc7 53.Ke5 Kd7 54.f4 Kc7 55.f5 Kd7 56.f6 Kc7 57.f7 Kd7 58.f8Q Kc7 59.Qf7 (59...Kc8 60.Re8) 1–0. Francia,Pasquale – El Paron, 5 minutes game, 2005.

4.a4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5).

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.b5).

4.Bf6 ef6 5.e3 +=.

4.Bf6 gf6 5.e3 Bg7 (5...e5 6.Nf3+=) 6.a4 (6.Nf3 a6=) 6...0-0 (6...a6 7.Nc3=) 7.Nf3 (7.Qh5 f5 8.c3 a6 9.ba6 Na6=) 7...Bg4 (7...e5 8.Nc3=) 8.Be2 (8.h3 Bh5=) 8...a6 9.h3 (9.bc6 Nc6 10.0-0 Rc8=) 9...Bh5 (9...Bf3!? 10.Bf3 ab5-/+) 10.g4 (10.Ra3 c5=) 10...Bg6 11.Nc3 (11.bc6 Nc6 12.Nc3 b6=) 11...Qa5 (11...ab5 12.ab5 Bc2 13.Qc1 Ra1 14.Qa1+=) 12.Nd4 (12.Rb1 ab5 13.ab5 Rd8=) 12...ab5+= 13.ab5?? (better is 13.Nb3 Qb4 14.ab5 Ra1 15.Na1+=) 13...Qa1-+ 14.Qa1 (14.f4 Qb2 15.0-0 e5-+) 14...Ra1 15.Nd1 (15.Bd1 f5! 16.gf5 Bd4 17.fg6 Bc3 18.gh7 Kh7 19.dc3 Rg8-+) 15...c5 (15...e5 16.Nf5-+) 16.Nb3 Rb1 17.d3 Nd7 (17...c4 18.dc4 dc4 19.Nd4-+) 18.Kd2 (18.h4 h6-+) 18...b6 (18...f5 19.f4-+) 19.Rh2 (19.h4 h6-+) 19...e6 20.h4 h6 21.f4 (21.h5 Bh7-+) 21...Ra8 22.h5 Bh7 23.Rg2 Kf8 24.Nc3 Rh1 25.Nd1 Ra2 26.Nc1 Ra5 27.Nf2 Rh4 28.d4 c4 29.Rg3 Rb5 30.Nh3 Rb2 31.f5 ef5 32.Nf4 fg4 33.Nd5 Rc2 34.Ke1 Rc1 (34...Rc1 35.Kf2 Rh2 36.Rg2 Rg2 37.Kg2 Be4 38.Kf2 Bd5 39.Bg4 c3 40.Bd7 c2-+) 0–1. mic (2190) – rr (2290), net–chess.com, 2008.

5.e3 Bg4 6.f3 Bd7 7.f4 =.

7.Ba1 Qa5 8.Bc3 Qb6 9.Bd4 (9.bc6 Nc6 10.Nf3 Ne4=) 9...c5 10.Bb2 c4 11.Bd4 (11.Bf6 Qf6 12.d3 cd3 13.Qd3 Qa1=+) 11...Qb5 12.Na3 (12.Nc3!? Qc6 13.Nf3=+) 12...Qa4 13.Qa1 (13.Nb1 Bf5 14.d3 Nc6-/+) 13...e6 (13...Nc6 14.Nf3-+) 14.Bb2 Nc6 15.Nb1 (15.f4 b5-+) 15...Qa1 (15...Qc2!? 16.Bf6 Qc1 17.Ke2 gf6 18.Nf3-+) 16.Ba1 Bd6 (16...e5 17.Nf3 Bd6 18.Nc3-+) 17.Nf3 (17.Bf6 gf6 18.Nf3 b5-+) 17...e5 18.Nc3 Be6 19.Nb5 (19.Nb5 Ke7 20.d4 Bb4 21.c3-+). AhmedSultanov (1820) – HarisPilt0n (1690), lichess.org, 2019.

7.Ba1 Qa5 8.Bc3 Qc7=.

7.Ba1 Qa5 8.Nc3 e5 9.bc6 bc6 10.Nf3 Bd6 11.Be2 Ba6 12.0-0 Be2 13.Ne2 0-0 (better is 13...Nbd7!?=+) 14.Ne5 Re8 15.d4 Qc7 16.c3 Be5 17.de5 Qe5 18.c4 Qd6 19.Bf6 gf6 (19...Qf6!? 20.cd5 Rd8+=) 20.cd5+- Rd8 21.Qc1 (21.Nf4!?+-) 21...Qd5+/– 22.Nf4 Qd6 23.g3 c5 24.Qc4 Re8 25.Rc1 Nd7 26.Kg2 (26.Nh5 Kh8+/–) 26...Re5 27.Rc2 Nb6 28.Qc3 Qd5?? (better is 28...c4+=) 29.Nd5+- (29...Nd5 30.Qa5+-) 1–0. Bittner,Hannjoerg – Hanfland,A, corr, 1988.

7.Ba1 Qa5 8.Nc3 e6 9.Nf3 Bb4 10.bc6 Nc6 (10...bc6 11.Ne2=) 11.Be2 (11.Nb5 Qd8=) 11...0-0 (11...Ne4 12.0-0 Bc3 13.dc3 Nc3 14.Bc3 Qc3 15.Bb5-/+) 12.0-0 Bd7 13.Qb1 Ra8 14.Bb2 b6 (14...e5 15.Bb5 e4 16.Bc6 bc6 17.Ne5=+) 15.Qa1 Qa1 16.Ra1 Ra1 17.Ba1 Bc5 (17...e5 18.d3=) 18.d4 Bd6 19.Nb5 Bb4 20.c4 dc4 21.Bc4 Na5 22.Bf1 Nd5 23.Ne5 Bb5 24.Bb5 f6 25.Nc4 Nc4 26.Bc4 Kf7 27.Kf1 Bc3 28.Bc3 Nc3 29.Ke1 Ke7 30.f3 Kd6 31.Kd2 Nd5 32.e4 Nc7 33.Kc3 e5 34.Bd3 (34.h4 g6=) 34...ed4 35.Kd4 Ne6 36.Ke3 Nc5 (36...Kc5 37.f4=) 37.Bc4 h6 38.g3 Kc6 39.f4 b5 40.Bd5 Kd6 41.Kd4 Ne6? (41...Nd7 42.Bf7 b4 43.h4+=) 42.Ke3?? (better 42.Be6 Ke6 43.Kc5+-) 42...Nc7= 43.Bb3 Kc5 44.Kd3 Na6 45.Kc3 (45.e5 Nb4 46.Ke4 fe5 47.fe5 Nc6+=) 45...Nb4= 46.Be6 Nc6 47.Bf5 Nd4 (47...g5 48.Kd3=) 48.Bg6= b4 49.Kd3 Nf3 50.e5?? (better 50.h4=) 50...fe5-+ 51.Ke3 Nh2 52.fe5 Ng4 (better 52...b3!? 53.Bf7 b2-+) 53.Kf4-/+ Nf2 54.e6 (better 54.Bc2!?-/+) 54...Kd6-+ 55.Bf7 (55.Kf3 Nh3 56.Ke4 Ng5 57.Kd4 Ke6-+) 55...Nd3 56.Ke4 Ne5 (better 56...Nc5 57.Kd4 b3-+) 57.Kf5?? (57.Bg8 Nc6-+) 57...Nc6 (57...Nf7!? 58.Ke4 Ke6 59.Kd3 Ne5 60.Kc2-+) 58.Bg8?? (58.Ke4-+) 58...Ne7 59.Kf4 (59.Ke4 Ng8 60.Kd3-+) 59...b3 60.Bh7 b2 (better 60...g6 61.Kf3 b2-+) 61.Bb1 Ke6 62.Kg4 (62.Ke4 h5-+) 62...Kf6 63.Kf4 Kf7 (better 63...Nd5 64.Kg4-+) 64.Ba2 (64.Ke3-+) 64...Kf6 65.Bb1 Nd5 66.Kf3 Nc3 67.Bd3 Nb1 (better 67...b1Q 68.Bb1 Nb1-+) 68.Bb1-/+. BeepBeepImAJeep (2600) - Babyskak (2290), lichess.org, 2018.

7.Ba1 Bf5 8.Nf3 Bg4 9.c4 Nbd7 10.Qa4 Nb6 11.Qa5 Bf3 12.gf3 Qa8?? 13.Qa8?? Na8+= 14.c5 e5 15.Be5 Nd7 16.bc6 bc6 17.Bc3 Nc5 18.d4 Ne6 19.f4 f5 20.Bd3 g6 21.Ke2 Nac7 22.Rc1 Bd6 23.Nd2 Kd7 24.Nf3 Ra8 25.h4 Ra2 26.Rc2 (White gets the initiative) 26...Ra3 27.h5+= Ne8 28.hg6+- hg6 29.Nh4 Nf8 30.Ng6! Ng7 31.Nh4 Ke6 32.Bd2 c5? 33.dc5 Bc7 34.Bc3 (34...Kf7 35.Bb2+-) 1–0. Schiffler – Keil, corr, 1950.

7.Ba1 Bg4 8.Nf3 Nbd7 9.Bf6 Nf6 10.d4 Qa5 11.Nbd2 Ne4 12.bc6 Bf3 13.cb7+- Qb4 14.b8Q Qb8 15.Nf3 Qb4 16.Nd2 e6 17.Bd3 Nd2 18.Qd2 Qb1 19.Qd1 Qb4 20.Ke2 Qa5 21.Qa1 Qd8 22.Qa4 Qd7?? 23.Bb5+- (23...Bd6 24.Bd7 Ke7 25.Bc6+-) 1–0. Loetzbeier – Zimmer, (year?).

5.ab5 a5 6.e3 b6 7.c4 Bb7 8.Nf3 dc4 9.Bc4 e6 10.0-0 Be7 11.d4 0-0 12.Nbd2 Nbd7 13.Bd3 Rc8 14.Nc4 h6 15.Nfe5 Ne5 16.Ne5 Qd5 17.f3 Qd8 18.Rc1 Bd6 19.Nc4 Bb8 20.Qb3 Nd5 21.e4 (21.Ba3 Re8+=) 21...Nf4= 22.Rfd1 Qg5 23.g3 Nd3 24.Kg2?? (24.Rd3 f5 25.Nd2=+) 24...Nc1-+ 25.Bc1 Qf6 (better 25...Qd8!? 26.Ba3 Re8 27.Qd3-+) 26.Nb6 Rcd8 (26...Rc7 27.Ba3 Rd8 28.Bc5-+) 27.Bb2 (27.Nc4 Rd7-+ (27...Rd4?! 28.Bb2 Rfd8 29.Bd4 Rd4 30.Na5 Rd1 31.Qd1 Qb2 32.Kh3 Qb5 33.Nb7 Qb7 34.f4-+)) 27...g5 (27...Bd6 28.d5 Qe7 29.Bc3-+) 28.d5 Be5 29.Be5 Qe5 30.Nc4 Qf6 (30...a4 31.Ne5 ab3 32.Nc6 Bc6 33.bc6 ed5 34.ed5-+) 31.d6 (31.Na5 Rd7-+) 31...g4! 32.Qe3 (32.fg4 Qg6 Double attack (32...Be4 Deflection; 32...Qg6 Decoy)) 32...gf3 33.Kf2 e5 (better 33...Qg6!? 34.Na5 Be4 35.Rd2-+) 34.Na5 Ba8 35.Nc4 (35.Qd3 Rc8-+) 35...Rc8 (35...Qe6 36.Rc1-+) 36.Nb6 (36.Qd3 Rfd8-+) 36...Rc2 37.Rd2 Rd2 (37...Be4 38.Rc2 Bc2 39.Nd7 Qd6 40.Nf8-+) 38.Qd2 Rd8 (better 38...Qe6 39.Qd3-+) 39.Nc4 (39.Na8 Ra8 40.d7-+) 39...Be4 40.Qe3 Bd5 41.Qe5 Qe5 42.Ne5 Rd6 43.Ng4 Re6 44.b6 (44.Ne3 Bb7-+) 44...Rc6 (better 44...Rb6 45.Ke3 f5-+) 45.Nf6 (45.b7 Rc2 46.Ke1 Bb7 47.Nh6 Kh7 48.Ng4-+) 45...Rf6 46.b7 Rb6 47.Ke3 Rb7 48.g4 (48.Kd3 f2 49.h4 f1Q 50.Kd4 Qc4 51.Ke5 Rb6 52.g4 Qe4) 48...Rb3 49.Kf2 (49.Kd2 f2 50.g5 f1Q 51.gh6 Qf2 52.Kc1 Rc3 53.Kd1 Bf3) 49...Rb2 50.Ke3 f2 51.Kd4 (51.Kd3 f1Q 52.Kd4 Qc4 53.Ke5 Rb6 54.g5 Qe4) 51...f1Q 52.Kc5 (52.Kd5 Qd1 53.Ke4 Re2 54.Kf4 Qd4 55.Kg3 Qe3 56.Kh4 Rh2) 52...Qd3 53.g5 (53.Kd6 Be6 54.Ke5 Re2 55.Kf6 Qd8) 53...Be6 (53...Bb7 54.gh6 Rb5) 54.Kc6 Qc4 (54...Qd5 55.Kc7 Qd7) 55.Kd6 Rd2 56.Ke7 Qc7 57.Kf6 Qd8 (57...Rf2) 58.Ke5 Qg5 (58...Qd4) 59.Ke4 Qg4 (59...Bd5) 60.Ke5 (60.Ke3 Re2 61.Kd3 Qc4) 60…Qd4 0-1. BeepBeepImAJeep (2760) - caissaisabelle (2700), lichess.org, 2020.

5.ab5 a6 6.e3 Qb6 7.c4 dc4 8.Bc4 e6 9.Nf3 Bc5 10.0-0 Nbd7 11.d4 Bb4 12.Nc3 Bc3 13.Bc3 0-0 14.Qb3 Nb8? (better 14...Re8+/-) 15.Ba5+- Qd6 16.Bb4 (16.Bb4 Qd8 17.Bf8 Qf8 18.Rfc1+-) 1-0. BeepBeepImAJeep (2605) - vegasgoldenknights (1795), lichess.org, 2018.

5.ab5 a6 6.e3 Bd7 7.Nf3 e6 8.d4 (8.Ne5 Bd6=) 8...Bb4 9.c3 Bd6 10.Be2 0-0 11.0-0 Ne4 12.Nbd2 Be8 (12...Qc7 13.Ne4 de4 14.Ng5=) 13.Ne4 de4 14.Nd2 Qh4 (better is 14...f5!?+=) 15.g3+- Qh3 (15...Qd8 16.Ne4 Be7 17.Ba3+-) 16.Bg4 (better is 16.Nc4!? Bg3 17.fg3 Bb5 18.Nd6+-) 16...Qh6+/– 17.Ne4 Be7 18.Be2 Bc6?? (better is 18...Qg6 19.Nc5 e5+-) 19.bc6+- bc6 20.Bf3 Nd7 21.Nc5 Nf6 22.Bc6 Ng4 23.h4 Nf6 24.Ba8 Bd6 25.Ne4 Ne4 26.Be4 f5 27.Bf3 Rf6 28.Ra6 Be7 29.d5 Rg6 30.Re6 Bf6 31.Kh2 f4 32.ef4 Bh4 33.Rg6 Bg3 34.Kg3 Qg6 35.Bg4 h5 36.Re1 Qg4 37.Qg4 hg4 38.Kg4 (38...g6 39.d6 Kf7 40.d7 g5 41.f5 Kg7 42.Kg5 Kf7 43.d8Q Kg7 44.Re7) 1–0. Hugi – Nautiluschess, ICS blitz, 2000.

5.ab5 a6 6.e3 Nbd7 7.c4 (7.Nf3 e6=) 7...dc4 8.Bc4 e6 9.Nf3 Nb6 10.Be2 Bd7 (10...Bd6!?=) 11.ba6+- ba6 12.0-0 (12.Ra6 Ra6 13.Ba6 Bd6+-) 12...Bd6 (12...a5 13.Ne5+=) 13.Nc3 (13.Ba6 0-0+-) 13...0-0 (13...a5 14.Nb5 Be7 15.Be5+=) 14.h3 (14.e4 Bb4+=) 14...Qc7 (14...a5 15.Nb5 Bb4 16.Be5=) 15.Rc1 (15.Ba6!? Na4 16.Na4 (16.Ra4?! Ba4 17.Qa4 Qb6=+) 16...Ra6 17.Bf6 gf6 18.Nc3 Ra1 19.Qa1+-) 15...Qb7= 16.Bd3 (16.d4 Bc6=) 16...Bc6=+ 17.Be2 Nfd5 (17...a5 18.Ra1=+) 18.Nd5 (18.Ne4 Bb4=) 18...Nd5 (18...Bd5 19.d3=+) 19.Ne5 (19.Be5 Qd7=) 19...Be5 (19...Qb2 20.Nc6 Rfc8 21.Qa4=+) 20.Be5= Nb4 (better 20...f6 21.Bg3 Nb4=) 21.Rc6 (better 21.Bc4 Bd5 22.Bd5 Nd5 23.Qg4+=) 21...Nc6-/+ 22.Bf3 Qb6 (22...Qd7 23.Qa1 f6 24.Bg3-/+) 23.Bc3 (23.Qa1 Ne5 24.Ba8 Nc4=+) 23...Rac8 24.Be4 (24.Qa1 f6=+) 24...Na5 (24...f5 25.Bf3-/+) 25.Qh5 (better 25.Qe2=+) 25...g6?? (better 25...f5!? 26.Bd3 Nb7-/+) 26.Qh6?? (better 26.Ba5 Qe3 27.de3 gh5 28.Ra1+-) 26...Rc3=+ 27.dc3 Qc5 (27...Nb3 28.Qh4=) 28.h4 (28.Bd3!?=) 28...Qc3=+ 29.h5 Qg7 (29...Nb3 30.hg6 fg6 31.Rb1-/+) 30.Qg5 (30.Qg7 Kg7 31.Rb1 gh5=+) 30...Nc4 31.hg6 (31.Rc1 Nd2 32.Bd3 a5=+) 31...hg6 (better 31...Nd2 32.Bd3 Nf1 33.gh7 Kh8 34.Qg7 Kg7 35.Kf1 a5-+) 32.Qc5?? (better 32.Rd1=+) 32...Nd2-+ 33.Bb7 (33.Bd3 Nf1 34.Bf1-+) 33...Nf1 34.Kf1 (34.Qc1 Ne3! 35.fe3-+) 34...Kh7 (better 34...Qa1 35.Ke2 Qb2 36.Kf3 Qb7 37.Kg3-+) 35.Ba6?? (35.Qa5 Qb2 36.Qc7 Kg7-+) 35...Ra8 (35...Qa1 36.Ke2 Qa6 37.Kf3-+) 36.Qc4 (36.Bd3 Qa1 37.Ke2 Ra2 38.Bc2-+) 36...Qa1 37.Ke2 Qa6 (37...Qa6 38.Qa6 Ra6-+) 0–1. KLINGON09 (1815) – Bobbyfishmina (1800), lichess.org, 2020.

5.ab5 a6 6.e3 e6 7.Nf3=.

5.ab5 b6 6.e3 Bb7 7.d4 Nbd7 8.c4 0.00/0 8...e6 0.00/0 9.cd5 0.00/0 9...Bd5 0.00/0 10.Nf3 0.00/0 10...Bb7?! 0.00/0 11.Nc3?! 0.00/0 11...Be7?! 0.00/0 12.Be2 0.00/0 12...0-0 0.00/0 13.0-0 0.00/0 13...Rc8?! 0.01/0 14.Ne5?! 0.00/0 14...Ne5 0.00/0 15.de5 0.00/0 15...Nd5 0.00/0 16.Nd5 0.00/0 16...Bd5 0.00/0 17.Bf3?! 0.00/0 17...Ba8?! 0.00/0 18.Ba8?! 0.00/0 18...Ra8 0.00/0 19.Qd8 0.00/0 19...Rfd8 0.00/0 20.Rfd1 0.00/0 20...Rdc8?! 0.00/0 21.Rd7 0.00/0 21...Re8?! 0.01/0 22.Rda7 0.01/0 22...Ra7 0.01/0 23.Ra7 0.01/0 23...Bc5 0.01/0 24.Bd4 0.00/0 24...Rc8?? 0.04/0 25.g3?? 0.01/0 25...g6 0.01/0 26.Bc5? 0.00/0 26...bc5?? 0.03/0 27.b6 0.03/0 27...Rb8 0.03/0 28.b7 0.03/0 28...Kg7 0.03/0 29.Kf1 0.03/0 29...c4 0.03/0 30.Ke2 0.03/0 30...c3? 0.05/0 31.Kd3 0.05/0 31...c2 0.05/0 32.Kc2 0.06/0 32...Kf8?? 0.54/0 33.Kc3?? 0.03/0 33...Ke8?? 0.53/0 34.Kc4?? 0.03/0 34...Kd7 0.03/0 35.Kc5 0.03/0 35...Kc7 0.03/0 36.f4 0.03/0 36...h5 0.03/0 37.h3 0.04/0 37...Kd7?? 0.48/0 38.g4?? 0.03/0 38...Kc7 0.03/0 39.gh5 0.05/0 39...gh5 0.05/0 40.h4 0.05/0 40...Rb7?? 0.59/0 41.Rb7 0.60/0 41...Kb7 0.59/0 42.Kd6 0.59/0 42...Kc8?! 0.00/0 43.Ke7 0.60/0 43...Kc7 0.00/0 44.Kf7 0.60/0 44...Kc6?! 0.00/0 45.Ke6 0.00/0 45...Kc5 0.00/0 46.f5 0.00/0 46...Kc4 0.00/0 47.f6 0.00/0 47...Kd3 0.00/0 48.Kf5 0.00/0 48...Ke3 0.00/0 49.Kg5 0.00/0 49...Kd4 0.00/0 50.Kh5 0.00/0 50...Ke5 0.00/0 51.Kg5 0.00/0 51...Ke6 0.00/0 52.h5 0.00/0 52...Kf7 0.00/0 53.h6 0.00/0 53...Kg8 0.00/0 54.Kh5 0.00/0 54...Kh8 0.00/0 55.Kg5?! 0.00/0 55...Kg8 0.00/0 56.f7?? 0.00/0 56...Kf8?? 0.00/0 57.Kh5?? 0.00/0 57...Kf7 0.00/0 58.h7 0.00/0 58...Kg7 0.00/0 59.h8Q 0.00/0 59...Kh8 0.00/0 ½-½. TimC (2365) - chessprophecy (2215), Rated Bullet game, lichess.org.

5.ab5 Bd7 6.e3 a6 7.Nf3 e6 8.c4 a5 9.cd5 ed5 10.Bd3 Be7 11.0-0 0-0 12.Qc2 Qb6 Exerts pressure on the isolated pawn (12...Bg4 13.Ne5 Be6 14.Rc1+=) 13.Bd4+/- Qd8 14.Nc3 Be6 (14...Bg4!?+/-) 15.Bf6 Bf6 16.Bh7 Kh8 17.Bf5 Nd7 18.Be6 fe6 19.Ra4 Nc5 20.Rg4 (20.Ra3 Bc3 21.Qc3 Ne4+/-) 20...Qe7 (20...Rc8 21.Qb1+/-) 21.d4 Nd7 22.e4 b6?? (22...Qb4 23.e5 Rac8+-) 23.e5+- (23.ed5?! Rfc8+-) 23...a4 (23...Rfc8 24.ef6 Qf6 25.Re1+-) 24.ef6 Nf6 25.Rh4 Kg8 26.Ne5 Qb4 (26...Qb7 27.Na4 Rfe8+-) 27.Qd3 a3 (27...Nh5 28.Rh5 Rf5 29.Nd5 Qd6 30.Nf6 gf6 31.Qg3 Rg5 32.Rg5 fg5 33.Qg5 Kf8 34.Rc1 Qe7 35.Ng6 Kf7 36.Qe7 Kg6 37.Qe6 Kh5 38.Qf5 Kh6 39.Rc6 Kg7 40.Rg6 Kh8 41.Qh5) 28.Qh3 g5 (28...Nh7 29.Qe6 Rf7 30.Qf7 Kh8 31.Ng6) 29.Rh8 Kg7 30.Qh6 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.ab5 e6 6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5).

5.ab5 Bf5 6.e3 e6 7.c4 Nbd7 8.Nf3 dc4 9.Bc4 Rc8 10.Be2 Qb6 (10...Bc2 11.Qc1=) 11.Nc3 Bd6 12.0-0 0-0 (12...e5 13.d4 e4 14.Nh4=) 13.h3 (13.Nh4 Be4+=) 13...Nc5 14.d4 Nce4 15.Na4 Qd8 16.Ne5 Nd7 17.Bf3 Ng5 (better 17...Ne5 18.de5 Bb4=+) 18.Bb7+/- Rb8 (better 18...Rc7 19.Nd7 Qd7+/-) 19.Nc6?? (better 19.Bc6 Nh3 20.gh3 Bh3 A) 21.Bd7 Be5 22.Qh5 Bf1 (22...Qd7? 23.Qh3 Bd6 24.Nc3+-) 23.Qe5 Qd7 24.Rf1 Rb5-/+ (24...Qb5?! 25.d5 f6 26.Qe6 Kh8 27.Ra1=); B) 21.Nd7 Qg5 22.Qg4 Qg4 23.Kh1 Bg2 24.Bg2 Qh5 25.Bh3 Qh3 26.Kg1 Qh2; C) 21.Qh5 Bf1 22.Nd7+-) 19...Qc7?? (better 19...Nh3 20.gh3 Qg5 21.Kh1 Bh3-+ (21...Rb7 22.Qf3 Qh4 23.Kg1 Rb5 24.Nc3 Rb2 25.Ra5-+)) 20.Nb8+- Nb8 21.Bc6! Bh3? (21...Nc6 22.Rc1 Decoy) 22.gh3 Nh3 23.Kg2 Ng5 24.Rc1 f5 (24...Nc6 25.Rc6 Qb7 26.Qc2+-) 25.f4 Nf7 26.Rh1 (26.Bf3 Qa5 27.Qb3 Nd8+-) 26...Qe7 (26...Nc6 27.bc6 (worse 27.Rc6 Qb7+-) 27...Rb8 28.d5 ed5 29.Qd4+-) 27.Qh5 Nh6 28.Nc5 (28.Bf3!? Rd8+-) 28...Nc6 29.bc6 e5 (29...Rb8 30.Ba1+-) 30.Nd7 Rc8 (30...ed4 31.Nf8 Qf8 32.Bd4+-) 31.de5 Bb4 (31...Bc7 32.Kf3 Qf7 33.Nf6 gf6 34.Qh6 Qd5 35.Kg3+-) 32.Bd4 (32.Nf6 gf6 33.Qh6 Qg7 34.Qg7 Kg7 35.ef6 Kg6+-) 32...Bd2 (32...Qe6 33.Nf6! Kh8 34.Qf3 Qa2 35.Kg3+-) 33.Qf3 (better 33.Rc2 Bb4 34.Nf6 gf6 35.Qh6+-) 33...Bc1 34.Rc1 Ng4 (34...Qe6 35.Ra1 Rc6 36.Ra7 Qg6 37.Kf1 Rc1 38.Ke2 Rc2 39.Kd3+-) 35.Qd5 (35.e4 Qe6+-) 35...Kh8 36.Rh1 (36.Ba7 Qa3 37.Rc2 Qa7=) 36...h6 (36...Qb4 37.Rd1 Qa4+-) 37.e6 Kh7 (37...Kg8+-) 38.Qf5 g6 39.Qg4 Rc6 (39...Qc5 40.Rh6! Kh6 41.Nc5 Kh7 42.Qh4 Kg8 43.Qh8) 40.Rh6! Kh6 (40...Kh6 41.Qh3 Mate attack) 41.Qh3 Qh4 42.Qh4 1-0. BeepBeepImAJeep (2640) - CD45 (2325), lichess.org, 2019.

5.ab5 g6 6.e3 Bg7 7.c4 Nh5 (7...0-0 8.Nf3=) 8.Nc3 dc4 9.Bc4 0-0 10.Be2 Nf6 11.Nf3 Nbd7 12.0-0 Qc7 13.d4 e5 (13...Nb6 14.Rc1+=) 14.Rc1+/- ed4 15.Nd4 (15.Nd5 Qa5 16.Bd4 Nd5 17.Bg7 Kg7 18.Qd5 Nf6+/-) 15...Qd6 16.Qb3 Ne5? (16...Rd8 17.Ba3 Qe5 18.Rfd1+=) 17.Qa2?? (better 17.Ba3 Qd8 18.Bf8 Qf8 19.Nd5+-) 17...Neg4+= 18.Nf3 Qe7? (better 18...Be6 19.Qa1 Rfc8+=) 19.Ba3+- Qe8 20.Bf8 Bf8 21.h3 Be6 22.Qb2 Nh6 23.Rfd1 Bg7 24.Qb4 a6 25.ba6 ba6 26.Nd4 (26.Qa5 Nf5+-) 26...a5 27.Qa3 Bd7 28.Bb5 Bb5 29.Ncb5 Bf8 30.Qa1 (better 30.Qa4 Ra6 31.Rd2+-) 30...Bg7?? (30...Qe5+-) 31.Nc7 Qc8 32.Na8 Qa8 33.Rc5 (better 33.Nc6 Nd5 34.Qa4 Nc3 35.Rc3 Bc3 36.Rd8 Qd8 37.Nd8 Kg7+-) 33...Ne4 (33...a4 34.Qc3 Bf8+-) 34.Ra5 Qe8 (34...Qb7 35.Ra8 Bf8 36.Rb1+-) 35.Ra8 (35.Ra8 Qf8 36.Rc1+-) 1-0. BeepBeepImAJeep (2740) - Haydon (2580), lichess.org, 2020.

5.e3 Bd7 6.ab5 a6 7.c4 Qb6 8.Nf3 dc4 9.Bc4 Bb5?? 10.Bd4 (10.Qb3 Nc6 11.Bb5 Rc8 12.Bf6 gf6 13.Bc6 Qc6+-) 10...Qc7? (better 10...Qc6 11.Ne5 Qg2 12.Bb5 Nbd7+-) 11.Bb5 Nc6 (11...Nbd7 12.Nc3 e6 13.0-0+-) 12.0-0 (12.Ne5 Nd7 13.Nc6 bc6 14.Ba6 e5+-) 12...e6 13.Be5 (13.Bf6 gf6 14.Nd4 Bd6+-) 13...Bd6 14.Bd6 (14.Bf6 gf6 15.Nc3 Rc8 16.Bc6 Qc6+-) 14...Qd6 15.Bc6 Qc6 16.Nc3 0-0 17.Ne2 Rad8 18.d4 Nd5 19.Ne5 Qc7 20.Rc1 Qe7 21.Qb3 b5 (21...Rc8 22.e4 Nf6 23.Qf3+-) 22.Nd3 (22.Nc6 Qd6 23.Nd8 Rd8+-) 22...a5?! (22...Ra8+-) 23.Qb5 Rb8 (23...Ra8 24.Ra1 Qc7 25.Rfb1+-) 24.Qa5 Ra8 25.Qc5 Qf6 26.Ndf4 Ne7 (26...Nf4 27.Nf4 Rfb8 28.Ra1+-) 27.Ng3 Ng6 (27...Rfe8 28.Qh5+-) 28.Ne4 Qh4 29.Ng6 hg6 30.Ng3 Kh7 31.Qe5 f6 (31...Ra7 32.Ra1 Rd7 33.Rfc1+-) 32.Qe6 Rae8 33.Qh3 (33.Qc6!? f5+-) 33...Qh3 34.gh3 f5 35.Rc5 Kh6 36.Ne2 g5 37.h4! gh4 38.f4 (38.Rc6 Kh7+-) 38...g5 (38...Re3 39.Re5 Rb3 40.Kf2+-) 39.Kf2 (39.Rc6!? Kh5 40.fg5 Kg5+-) 39...g4 40.h3! g3 (40...gh3 41.Rc6 Decoy) 41.Kf3 Re4 (41...Rf7 42.d5 Rfe7 43.Nd4 Re3 44.Kg2+-) 42.Rg1 Rfe8 43.Rc3 (43.Re5 Kg6+-) 43...Rd8 (43...R4e6 44.d5 Rf6 45.Rc6+-) 44.Ng3! Rb8 (44...hg3 45.Rc6 Double attack (45.Rc6 Decoy)) 45.Nf5 (45.Nf5 Kh7 46.Rg5 Rbe8 47.Rc7 R8e7 48.Ne7 Rf4 49.ef4 Kh8 50.Rc8 Kh7 51.d5 Kh6 52.Rh8) 1-0. BeepBeepImAJeep (2540) - Expeed (2005), lichess.org, 2018.

5.e3 Bg4 6.Nf3 (6.f3 Bf5 7.Bb5 Nc6=) 6...Bf5 (better 6...ba4!? 7.Bf6 gf6 8.Ra4 Bd7-/+) 7.ab5= Nbd7 8.Be2 e6 9.Nd4 Be7 (9...Bg6!?=) 10.Nf5+= ef5 11.0-0 0-0 12.d4 (12.Nc3 Nb6+=) 12...Nb6 13.Nd2 Nc4? (better 13...Ne4=) 14.Nc4+- dc4 15.Bc4 Bd6 16.Bd3 Bb8 (16...Ne4 17.Qh5 g6 18.Qh6+-) 17.f4 (17.Qf3!? Qc7 18.g3 g6+-) 17...Nd5 18.Qf3 Re8 19.Rfe1 (worse 19.Bf5 Ne3 20.Be4 Nf1 21.Rf1 Bc7+/-) 19...Nb4? (better 19...Qd7+-) 20.Bf5 g6 (20...Qd5 21.Qd5 Nd5 22.Kf2+-) 21.Be4 (21.Qb7?! Bd6 22.c3 Rb8+-) 21...f5 (21...a5 22.c3 Qe7+-) 22.Bb7 Nc2 (22...Bd6 23.Ba8 Qa8 24.Qa8 Ra8 25.Re2+-) 23.Ba8 Na1 24.Ba1 (better 24.Bd5!? Kg7 25.Ra1 Qe7+-) 24...Bf4 25.Bd5 Kg7 26.Bc6 Re4 (26...Bh2 27.Kf1 Bd6 28.Be8 Qe8 29.Qb7 Kh6 30.Kf2+-) 27.Be4 (better 27.Bc3 Qh4 28.g3 Bg3 29.hg3+-) 27...Be3 (27...Bh2 28.Kf2 fe4 29.d5 Kg8 30.Qe4 Qf8 31.Ke2 Bd6+-) 28.Qe3 fe4 29.Qe4 (29.d5 Kf7 30.Qf4 Ke7 31.Qf6 Kd7 32.Qe6 Kc7 33.Be5 Qd6 34.Qd6 Kc8 35.Qc7) 29...Qf8 30.d5 Kh6 (30...Kg8 31.Qe5 Qc5 32.Kh1 Qf8 33.Qh8 Kf7 34.Qh7 Qg7 35.Qg7) 31.Qh4 1-0. BeepBeepImAJeep (2595) - decidement (1965), lichess.org, 2016.

5.e3 d4 6.ed4+= cd4 7.Nf3 e5 (7...Bg4 8.h3 Bf3 9.Qf3+/–) 8.Ne5+/– Bd6 (8...Qd5 9.Nf3 Bc5 10.Be2+/–) 9.Nf3 (9.Bd4 0-0+/–) 9...Bg4 (9...0-0 10.Bd4 Re8 11.Be2+/–) 10.Be2 Bc5 11.d3 (11.0-0 0-0+/–) 11...Bb6 (11...0-0 12.0-0+=) 12.Nbd2 (12.0-0 0-0+/–) 12...0-0 13.0-0 Nbd7 (13...Be6!?+/–) 14.Nd4+- Bd4 (14...Be2 15.Ne2 Re8 16.c4+-) 15.Bd4 Be2 16.Qe2 b6 (16...Re8 17.Qf3 Qc7 18.Nc4+-) 17.Bf6 (17.Rfe1 Re8 18.Qf3 a6+-) 17...Nf6 18.Ne4 Re8 19.Nf6 (19.Rfe1 Ne4 20.de4 Rc8+-) 19...Qf6 20.Qg4 Re5 (20...Qc3 21.Ra2+/–) 21.Rfe1 Rae8 22.Re5 Qe5 23.Rf1 f5 24.Qc4 Kh8 (24...Kf8 25.c3+-) 25.f4 (25.Qf7!? Ra8+-) 25...Qe3 26.Kh1 h6 (26...Qe7 27.d4+-) 27.Qc3 (27.Qf7 Rc8+-) 27...Kh7 28.h3 Qg3 29.Qd2 Re3 (29...Kg8 30.Qf2 Qf2 31.Rf2 Re1 32.Kh2+-) 30.d4 g5 (30...Kg8+-) 31.fg5 Qg5 32.d5?? (better is 32.Qf2+-) 32...Rh3!–+ 33.gh3 Qd2 34.Rf5 0–1. var – sometimes, Live Game Caissa's Web, 2004.

5.e3 Nbd7 6.c4 e6 7.Nf3 g6 (7...Bd6!?=) 8.Be2 Bg7 9.0-0 b6 10.cd5 ed5 11.d4 0-0 12.Nc3 Bb7 13.Rc1 a5 14.Qb3 Rc8 Black prepares the advance c4 15.Rfd1 Qe7 16.h3 Rfd8 17.Ba3 Qe8 18.Nb1 c4 19.Qc2 Ne4 20.Nc3 f5 21.Ne4 fe4 22.Nd2 Nf6 23.Nf1 h5 24.Qd2 Kh7 25.f4 ef3 26.Bf3 Ne4 27.Qe1 Bh6 28.Be4 Qe4 29.Rc3 Rf8?? (29...Re8 30.Qg3=+) 30.Bc1?? (better 30.Nd2 Qe6 31.Bf8 Bf8 32.Qe2+/-) 30...Rf7 (30...Rce8 31.Rd2-/+) 31.Ng3 (31.Nd2 Qe6=+) 31...Qe6-/+ 32.e4 de4 33.Bh6 Kh6 34.d5 Bd5?? (better 34...Qe5 35.Ne4 Rd7 (worse 35...Bd5 36.Qd2 Rf4 37.Rf3+/-) 36.Qe3 Kg7=) 35.Qd2+- Kh7 36.Qd5 Qf6?? (better 36...Qd5 37.Rd5 e3+-) 37.Ne4 (better 37.Rf1!? Qf1 38.Nf1 Re7+-) 37...Qe7 (37...Qf5 38.Ng5 Kg8 39.Nf7 Qd5 40.Nh6 Kg7 41.Rd5 Kh6 42.Rd6+-) 38.Qf7! Qf7 39.Ng5 Kg7 40.Nf7 Kf7 41.Rd4 1-0. BeepBeepImAJeep (2575) - slipslapmonster (2490), lichess.org, 2016.

5.e3 Bf5 6.c4 d4 7.Nf3 Bb1 8.Rb1+= de3 9.de3 Nbd7 10.Be2 e6 11.0-0 Be7 12.Qc2 0-0 13.Rbd1 Qc8 (13...Qc7 14.e4+/-) 14.a5 (14.e4 a6+/-) 14...a6 (14...Qc7 15.Bc3+/-) 15.b6 Nb8 16.Ne5 Nc6 17.Nc6 Qc6 18.Bf3 Qc8 19.Rd2 Rd8 20.Rd8 Bd8 21.Rd1 Be7 22.Qd3 h6 23.h3 Rb8 24.Be5 Ra8 25.Bc7 (better 25.g3+-) 25...Ne8?? (better 25...Kf8+-) 26.Qd7 Nc7 (26...Kf8 27.Qc8 Rc8+-) 27.Qe7 (27.Qe7 Nd5 28.cd5+-) 1-0. BeepBeepImAJeep (2715) - SupWitches (2510), lichess.org, 2020.

5.e3 Qb6 6.Nf3 cb5 7.Bd4 Qa5 (7...Qd8!? 8.ab5 Bg4+-) 8.ab5+- Qc7? (better 8...Qd8+-) 9.Ra7 Ra7 10.b6 (10.Ba7?! b6 11.Bb8 Qb8+=) 10...Qc6 (10...Qc8 11.ba7 Na6+-) 11.ba7 (11.ba7 Qc8 12.a8Q+-) 1–0. GuestKWYZ – ejg, freechess.org, 2020.

5.e3 e5 6.c4 e4 7.Nc3 dc4 (7...Bd6 8.bc6 bc6 9.cd5 cd5 10.Qb3=) 8.Bc4 Bc5 9.Qb3 0-0 10.Nge2 Bb6?? (better 10...Qe7!?=) 11.Ng3 (11.Ba3!?+-) 11...Qe7+/- 12.Ba3 c5 13.Bb2 Re8 (13...Rd8 14.Qc2+/-) 14.Nd5 Nd5 15.Bd5 Be6 16.Be6 (better 16.a5!? Bd8 17.a6+-) 16...Qe6+= 17.Qe6 Re6 (17...fe6? 18.Ne4 Nd7 19.a5+-) 18.Ke2 Nd7 19.Rhc1 (19.f3 ef3 20.gf3 Rc8=) 19...Rd8 (19...Bc7 20.Ra3=) 20.Bc3 (20.Rc4!? Rde8 21.Rd1+=) 20...Bc7=+ 21.f3 Bg3 22.hg3 b6 (22...f5 23.a5=+) 23.g4 Ne5 (23...f6 24.a5=) 24.Be5 (worse 24.fe4 Nd3 25.Rh1 Re4=+) 24...Re5 25.f4 (25.Rc4 ef3 26.gf3 g6=) 25...Red5 26.Ra2 h5 27.g5 (27.Rc4 Re8 28.gh5 Rh5=) 27...R5d6 (27...f5!?=+) 28.Rc4= Re6 29.a5 Kh7 30.ab6 ab6 31.Ra7 Kg6 32.Rc7 Red6 (better 32...f5!?=+) 33.Re4= Rd2 34.Kf3 f6? (34...R8d7 35.Rc6 R2d6+/-) 35.Rc6 (35.Ree7 Rg8 36.Re6 Rb8+-) 35...R8d6 36.gf6 Kf6 (better 36...gf6 37.Re8 R2d5+/-) 37.Rc7 (better 37.Re8!?+-) 37...g5 38.fg5 Kg5 39.Re5 Kg6 40.g3 (better 40.Rc6!?+=) 40...Rf6-/+ 41.Ke4 Rb2 42.Rd7 Rb5 43.Rdd5 Rb4 44.Kd3 h4 45.gh4 Rh4 46.Rg5 Kf7 47.Rg2 (47.Rd7 Ke6 48.Rgd5 Rb4=+) 47...Rhh6 48.Rdg5 Rd6 49.Ke4 Rhe6 50.Kf4 b5 (50...Rd1 51.Rg7 Ke8 52.Rb7 Rf1 53.Kg5 Re3 54.Ra2 Re5 55.Kg4 Re4 56.Kg5-/+) 51.e4 (51.Rc5 Rb6=) 51...Ke7 (51...Rd4 52.Re2 Rc4 53.Kf5-/+) 52.Ke3 (better 52.Rc5 Rd4 53.Re5=) 52...Rd4-/+ 53.e5 Rd5 (53...Rh6 54.Rg6 Rh3 55.Ke2 Re4 56.Kf2 Re5 57.Rb6-+) 54.Rg7? (better 54.Ke4 Rd1 55.Ra2=) 54...Kd8-+ 55.Kf4 Re7 (55...Rde5!? 56.Rb7 b4 57.Ra2 Re4 58.Kf5 R6e5 59.Kg6-+) 56.Rg8 (56.Re7 Ke7 57.Kf5 b4-/+) 56...Kc7-+ 57.R2g5 Rdd7 (57...b4 58.Ra8 Kb7 59.Rag8-+) 58.Kf5 (58.Ra8 Kb7 59.Rgg8 b4-/+) 58...b4-+ 59.Ke4 (59.Rg1 Rd2 60.R1g2 Rg2 61.Rg2 b3-+) 59...c4 60.R8g6 (60.Rg4 Kc6-+) 60...c3 61.Rg3 (61.Rg2 Rd1 62.Ra2 Re1 63.Kd4 Kb7-+ (63...R7e5?! 64.Ra7 Kb8 65.Ra4 R1e4 66.Kd3 Re3 67.Kd4-+)) 61...Rd2 (better 61...c2 62.Rg1 Rd1 63.Rg7 Rg7 64.Rg7 Kb6 65.Rg6 Kb5 66.Rg7-+) 62.Rc3 (62.Rg7 Rg7 63.Rg7 Kb6 64.Rg6 Kb5 65.Rg1-+) 62...bc3 63.Rg3 (63.Rg1 Red7 64.e6 Re2 65.Kf4 Re6-+) 63...c2 64.Rc3 Kd8 65.Kf5 Ke8 (better 65...Rc7 66.Rc2 Rdc2 67.Ke6 Re7 68.Kd5 Re2 69.Kd4 R7e5 70.Kd3 Ke7 71.Kc3 Kd6 72.Kb4 R5e4 73.Kb5 Rb2 74.Ka5 Re1 75.Ka4 Ra1) 66.Rd3 (66.e6 Rb7 67.Rc8 Ke7 68.Rc6-+) 66...Rd7 (66...c1Q 67.Rd6 Qc2 68.Kf4 Rf2 69.Kg3 Rg7 70.Rg6 Rg6 71.Kh4 Rh2) 67.Rd2 (67.Rd2 Rd2 68.Kf6 c1Q 69.Kf5 Qf1 70.Ke4 Rd3 71.e6 Qf3 72.Ke5 Rd5). BeepBeepImAJeep (2740) - pure_ego (2660), lichess.org, 2019.

5.e3 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd7).

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 Re8 9.0-0 Ne4 (9...a6 10.bc6 Bc6 11.c5=) 10.Bg7+= Kg7 11.d3 e5?? (better 11...Nf6+=) 12.de4+- de4 13.Nfd2 f5 14.Qc2 Qe7 15.Nc3 Be6 16.Rad1 Nd7 17.f3 ef3 18.Nf3 (18.Rf3 cb5 19.cb5 Rac8+-) 18...Rad8 (18...Qc5 19.Qc1 Nb6 20.bc6 bc6 21.Kh1+-) 19.Kh1 Qf6 Black plans f4 20.e4 f4 (20...Nc5 21.Rd8 Rd8 22.bc6 bc6 23.Qc1+-) 21.Rd6 (21.bc6 bc6 22.Rd6 Nb8 23.Rd8 Rd8+-) 21...Nc5 22.Rfd1 Rd6 23.Rd6 Qe7 24.Qd1 (better 24.Rd1 Bg4 25.bc6 bc6 26.Ne1 Be2 27.Qe2+-) 24...Kf7? (24...Bd5 25.cd5 Qd6 26.dc6 Qd1 27.Bd1 bc6 28.bc6 Re6 29.Ne5 Na6+-) 25.Ne5 Kf6 (25...Kg7 26.bc6 b6 27.Nd7 Nd7 28.cd7+-) 26.Nf3 (26.Qd4 Qf8 27.Nd7 Kf7 28.Nf8 Nb3+-) 26...g5 (26...Kf7 27.Qd4 Nb3 28.Qe5+-) 27.bc6 (27.Qd4 Kf7 28.Qc5 Bc8 29.Ng5 Kg7 30.bc6 bc6+-) 27...bc6 (27...Kg6 28.Ne5 Kg7 29.Nd7+-) 28.Rc6 (28.Qd4 Kf7 29.Qc5 Bc8 30.Ng5 Kg7+-) 28...Rd8 (28...Kf7 29.Nd5 Ne4 30.Ne7 Nf2 31.Kg1 Nd1 32.Ng5 Kf6 33.Re6 Kg5 34.h4 Kh4 35.Nf5 Kg5 36.Re8+- (36.Bd1?! Re6 37.Bc2 Rc6+/-)) 29.Nd5 Kf7 30.Ne7 (30.Rc5!? Bd5 31.Rd5 Rd5 32.Qd5 Kg6 33.Qf5 Kh6+-) 30...Rd1 31.Bd1 (31.Bd1 Ne4 32.Bc2 Nf2 33.Kg1 Ke7 34.Kf2+-) 1-0. BeepBeepImAJeep (2515) - sasan_al18 (2395), lichess.org, 2015.

5.e3 e5 6.c4 Bd6 7.Nf3 0-0 8.Be2 e4 9.Nd4 c5 10.Nf5 Ne5 11.Nd6=+ Qd6 12.d3 ed3 13.Bd3 Bg4 14.Be2? Be2 15.Qe2 Nc4 16.Bc3 Ne5 17.0-0 Rad8 18.Bb2 Neg4 19.Nc3?? Qh2# 0–1. stoker – jeanne2, Live Game Caissa's Web, 2006.

5.e3 e5 6.Nf3 Bd6 7.Nc3 0-0 8.a5 a6 9.b6 Nc5 10.d4 e4?? (better is 10...ed4 11.Nd4 Ng4+=) 11.dc5+- Bc5 12.Nd4 Bb4 13.Be2 Re8 14.0-0 Bd7 15.f4 (15.Nb3 Qe7+-) 15...Qe7 (15...ef3!? 16.Bf3 Qe7+/–) 16.f5 Qe5 17.Na2 Ba5 18.Rb1 (better is 18.Nc6!? Qb2 19.Na5+/–) 18...Bb6+= 19.Nc6 Bc6?? (better is 19...Be3 20.Kh1 Qd6=) 20.Be5+- (20.Be5 Be3 21.Kh1 Re5 22.c3+-) 1–0. MasterofDisaster – dumdago, Live Game Caissa's Web, 2004.

5.e3 e5 6.Nf3 Bd6 7.c4 0-0 8.Be2 a6 9.Nc3 ab5 10.ab5 Ra1 11.Ba1 Nc5 (11...dc4!? 12.bc6 bc6=+) 12.d4= ed4 13.Nd4 Bd7 14.0-0 Qc7 15.h3 Ra8 16.Bb2 Qc8 (16...Nce4 17.Qc1=) 17.Qc2 Nfe4 18.Ne4 (18.cd5 Nc3 19.Bc3 cd5+=) 18...Ne4 19.Bd3 Bh3 20.gh3 Qh3 21.Nf3?? (better 21.f3 Ng3 22.Qg2 (22.bc6 Ra2 23.Bh7 Kh8-+) 22...Qg2 23.Kg2 Nf1 24.Kf1-/+) 21...Ng5 (21...Qg4 22.Kh1 Qf3 23.Kg1 Qg4 24.Kh1 Qh3 25.Kg1 Qh2) 22.Be5 (22.Bh7 Kh8 (22...Qh7?! 23.Qh7 Nh7 24.cd5=) 23.Bg7 Kg7 24.Qc3 f6 25.Qf6 Kf6 26.Ne5 Nh7 27.f3 Ra2 28.Ng4 Ke7 29.Rf2 Ra1 30.Rf1 Qf1) 22…Nf3 0–1. AAI_Klaus (1845) – Aureliobar (1835), lichess.org, 2021.

5.Nf3 Qc7 6.e3 e5 7.c4 e4 8.Nd4 Bc5 9.cd5 cd5 10.Nf5 0-0 11.Ng3 Ne5 12.Nc3 Bg4 13.Be2?? (Better is 13.Qc2 Bb4 14.d4 ed3 15.Bd3=+) 13...Nd3-+ 14.Bd3 (14.Kf1 Nb2 15.Qb3 Nc4 16.Bc4 dc4 17.Qc4 Be6-+) 14...Bd1 15.Nd1 ed3 16.Nc3 Ne4 17.Nd5 Qd6 18.Nf4 Nf2 19.Kf2 Qf4 20.Ke1 Be3! 21.de3 Qe3 22.Kd1 Rac8 23.Re1 Qf4 24.Re4 Qf2 25.Bd4 Qc2 26.Ke1 Rfe8 27.Re8 Re8 28.Kf1 d2 29.Ne2 d1Q 30.Rd1 Qd1 31.Kf2 Qe2 32.Kg3 Re4 33.Ba7 Qg4 34.Kf2 Re2 35.Kf1 0–1. OPA – TonySlydini, Live Game Caissa's Web, 2004.

5.Be5 Bd6 6.Bd6 Qd6 7.e3 0-0 8.Nf3 Re8 9.Be2 Nbd7 10.0-0 Ne5 11.d4 Nc4 (11...Nf3 12.Bf3 Bf5 13.Nd2+=) 12.Nbd2 Nb2 (better 12...Nd2!? 13.Nd2 Bf5+/-) 13.Qb1+- Nc4 14.Nc4 dc4 15.Bc4 Bg4 16.Ne5 Rf8?! (16...Be6 17.Be6 Qe6 18.bc6 bc6 19.Qb3+-) 17.Qb3 (better 17.bc6 bc6 18.Nf7+-) 17...Rae8 (17...Be6+-) 18.Bf7 Rf7 (18...Kh8 19.Be8 Be6 20.Qa3 Qa3 21.Ra3 Re8 22.bc6 bc6 23.Nc6+-) 19.Qf7 Kh8 20.Qe8! Ne8 21.Nf7 Kg8 22.Nd6 Nd6 23.f3 Bd7 24.bc6 bc6 25.e4 Kf7 26.Rfb1 Ke6 27.Rc1 (27.Rb8 a5+-) 27...Nc4 28.Rab1 Na3 (28...a5 29.Rb3 Kd6 30.f4+-) 29.Rb3 (29.Rb3 Nc4 30.Rb4+-) 1-0. BeepBeepImAJeep (2570) - dannyskillzYoutube (1925), lichess.org, 2017.

5.Be5 Nbd7 6.Bb2 Bc5 7.e3 0-0 8.c4 (8.Nf3 Re8+=) 8...Re8 (8...dc4 9.bc6 bc6 10.Bc4+=) 9.Qc2 (9.d4 Be7+=) 9...cb5 10.ab5 b6 (10...d4 11.Nf3 Ne5 12.Ne5 (12.Nd4? Bd4 13.Bd4 Qd4-+) 12...Re5 13.Be2+=) 11.cd5 Nd5 12.Qf5 (12.Nf3 N7f6+=) 12...N7f6 13.Qg5 Bb7 (13...h6 14.Qg3=+) 14.Nf3+= Qe7 (14...h6!? 15.Qf5 Bc8+=) 15.Bc4+- h6 16.Qg3 Nh5 (better 16...Bd6 17.Ba3 Bg3 18.Be7 Bf2 19.Kf2 Re7=) 17.Qg4 (17.Qe5 Qe5 18.Ne5 Bd6+-) 17...Ndf6 (17...Ndf4 18.Ne5 Ng2 19.Kf1 Nf6+-) 18.Qh4+= Bf3 (18...Qd7 19.Bf6 Nf6 20.Nc3+=) 19.gf3+- Rad8 20.0-0 Qb7 21.Bf6 Nf6 22.d4 Be7 23.Qg3 Nh7 (23...Bd6 24.f4+-) 24.Qf4 (24.Nd2 Bd6 25.f4 Nf6+-) 24...Bg5 (24...Ng5 25.Kh1 Rc8 26.Be2+=) 25.Qf7 (better 25.Qf5+-) 25...Qf7= 26.Bf7 Kf7 27.Nd2 (better 27.Ra7!? Re7 28.Ra6=) 27...Re7-/+ 28.Ne4 Bf6 29.Kh1 Ng5 30.Ng5 Bg5 31.f4 Bf6 32.Rg1 Rd5 33.Rgb1 Rc7 34.Kg2 Be7 35.Kf3 g5 (35...Ke6 36.Ra4-/+) 36.fg5 Bg5 (36...Rg5 37.h3-/+) 37.Ke4=+ Ke6 38.f4 Be7 39.Rg1 Kd6?? (better 39...Bf6 40.Rab1 Re7=+) 40.Rg6+- Bf6 41.Rf6 (41.Rf6 Ke7 42.Rh6 Rb5 43.Rh7 Kd6 44.Rc7 Kc7 45.Ra7 Kd6 46.f5+-) 1–0. AleksandrNekhoroshik (1705) – Cyranodebergerac72 (1705), lichess.org, 2021.

5.e3 (---> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a4 Bf5 5.b5).

6.e3 a6 7.c4 ab5 8.ab5 Ra1 9.Ba1 Bd6 10.Be2 cb5 11.cb5 Qb6 12.0-0 (12.Qc2 Bf3 13.Bf6 gf6 14.Bf3 0-0=) 12...Qc5 (12...Bf3 13.gf3 Qc7 14.f4=+) 13.Nc3 (13.Bf6 gf6 14.d4 Qc7+=) 13...Ne4 14.h3 Nc3 15.Bc3 Bf3 16.Bf3 Qb5 17.Be2 Qd7 18.Qb1 (better 18.Bg7!? Rg8 19.Qa1+=) 18...0-0=+ 19.Bb5 Qe7 20.Rc1 Rc8 21.Bb2 Rc1 22.Qc1 Qc7 23.Qa1 h6 (23...f6 24.Qa8=+) 24.Bf1 (better 24.Bg7 Qc2 25.Qf6 Qb1 26.Bf1+/-) 24...f6-/+ 25.Bc3 Nd7 26.Qa2 Nc5 27.f3 Qb6 28.Bd4 Qc6 29.Qa8 Kh7 30.Qa5 (30.Qa2 e5 31.Qb1 Kh8-/+) 30...b6 (30...Nb3 31.Qc3 Nd4 32.Qd4-/+) 31.Qa7 e5 32.Bc3 Ne6 33.Qf7 Bc5 34.Bd3 e4 35.fe4 de4 36.Bc2 (36.Be2 Ng5 37.Qb3 f5-/+) 36...Ng5 37.Qb3 b5 (better 37...f5-/+) 38.Bb4?? (better 38.Bb1 b4 39.Bb4=) 38...Bb4-+ 39.Qb4 (39.h4 Nf7! 40.Qb1 f5 41.Qb4 Qc2 42.Qb5 Nd6-+) 39...Qc2 40.Qd4 (40.h4 Nf7 41.Qb5 Ne5-+) 40...Qd3 41.h4 (41.Qc3-+) 41...Qd4 42.ed4 Ne6 (better 42...b4 43.hg5 hg5 44.Kf2-+) 43.Kf2 Nc5 (better 43...b4 44.Ke1 Nd4 45.Kd1-+) 44.Ke3 (better 44.dc5 b4 45.Ke2+-) 44...Ne6 (44...Nd7 45.Ke4 Kg6 46.g4-+) 45.Ke4?? (45.Kf2 b4 46.Ke2-+) 45...Kg6-+ 46.d5 Nd8 47.Kd4 Kf5 (47...Kh5!? 48.Kc5 Kh4 49.Kb5-+) 48.Kc5 Ke5 49.Kb5 (49.h5 b4! 50.Kc4 b3 51.Kb3 Kd5-+) 49...Kd5 50.Kb4 Kd4 51.Kb5 Kd3 52.Kc5 Kd2 53.Kd5 (53.Kd4 Ne6 54.Ke4 Ke2-+) 53...Ke3 54.Kd6 Kf4 55.Ke7 Kg3 56.Kf8 Kg2 57.Kg7 Kg3 58.Kf6 Kh4 59.Kg6 h5 60.Kf5 Kg3 61.Ke4 h4 62.Ke3 h3 63.Ke2 Kg2 64.Ke3 h2 65.Kf4 h1Q 66.Kf5 (66.Ke3 Qe1 67.Kd4 Ne6 68.Kd5 Nf4 69.Kd6 Qb4 70.Kc6 Qc4 71.Kb7 Nd5 72.Ka8 Qc6 73.Kb8 Qc7 74.Ka8 Nb6) 66...Qe1 67.Kf6 (67.Kg5 Qe5 68.Kg6 Qe6 69.Kg7 Qf7 70.Kh6 Qf6 71.Kh5 Ne6 72.Kg4 Qg5) 67...Qe6 68.Kg7 Nf7 (68...Qf7 69.Kh6 Qf6 70.Kh5 Ne6 71.Kg4 Qg5) 69.Kf8 (69.Kg8 Ne5 70.Kh8 Qf6 71.Kh7 Qf7 72.Kh6 Qg6) 69...Ng5 (69...Ne5 70.Kg7 Qf7 71.Kh6 Qg6) 70.Kg7 Qf7 71.Kh8 (71.Kh6 Qf6 72.Kh5 Ne4 73.Kg4 Qg5) 71…Qh7 (71...Qf8) 0-1. BeepBeepImAJeep (2715) - Kcerov (2470), lichess.org, 2019.

6.e3 Bb4 7.Be2 0-0 8.0-0 Nbd7 9.c4 Bd6 10.d4 Re8 (10...dc4 11.Bc4 cb5 12.Bb5= (worse 12.ab5 Bh2 13.Kh1 Bc7-/+)) 11.Nbd2= Qe7 12.Rc1 Rac8 13.h3 Bf3 14.Nf3 Bb8 15.Qb3 e5 (15...cb5 16.Qb5 dc4 17.Nd2=) 16.de5 Ne5 17.Ne5 (17.cd5 cd5 18.Bd4 Qe6+=) 17...Be5 18.Be5 Qe5 19.cd5 cd5 20.Rc8 Rc8 21.Rd1 Rd8 Black plans d4 (21...Rc3 22.Qa2+=) 22.Bf3 Increasing the pressure on the isolated pawn on d5 22...d4 (better 22...b6!?+=) 23.Qb2 h6 24.Rd4 Rd4 25.Qd4 Qe7? (better 25...Qd4 26.ed4 b6+-) 26.Qa7 Qa3 (26...Qb4 27.b6 Nd7 28.a5+-) 27.g3 (27.Bb7 Qc1 28.Kh2 Qc2+-) 27...Qc1 (27...b6 28.Qb6 Qa4 29.Qb8 Kh7 30.b6+-) 28.Kg2 g5 29.Qb7 Kg7 (29...Qd2 30.Qa8 Kg7 31.b6+-) 30.Qc6 (30.a5 Ne8+-) 30...Qa3 (30...Qd2 31.b6 Nd7 32.Qc7 Nb6 33.Qb6+-) 31.b6 Qb4 (31...Qe7 32.b7 Nd7 33.Qc7+-) 32.b7 h5 Black intends g4 (32...g4 33.Bg4 h5+-) 33.Qb5 (better 33.Qc8 g4 34.Bc6 gh3 35.Kh3+-) 33...Qe7 (33...Qb5 34.ab5 Nd7 35.Bh5 f6+-) 34.b8Q (34.Qg5 Kh7 35.b8Q Qe6 36.Qf8 Qh3 37.Kh3 h4 38.Qfg7) 34...g4 35.hg4 (35.Qg5 Kh7 36.Qb1 Kh8 37.Bd5 Qe4 38.Be4 gh3 39.Kf3 Nd7 40.Qb2 f6 41.Qh6 Kg8 42.Qb3) 35...hg4 36.Qg5 Kh7 37.Qb1 Kh8 38.Qh1 (38.Qh1 Nh7 39.Qe7 gf3 40.Kf1 Kg7 41.Qh5 Ng5 42.Qeg5 Kf8 43.Qh8; 38.Bd5 Qf8 39.Qf6 Qg7 40.Qb8 Kh7 41.Be4 Qg6 42.Qbh8) 1-0. BeepBeepImAJeep (2525) - martian_potatoes (2010), lichess.org, 2018.

6.e3 Bd6 7.c4 Nbd7 8.Be2 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 cb5 (11...dc4 12.bc6 bc6 13.Qa6=+) 12.cb5 (12.Nb5!? Bc5 13.cd5 ed5 14.h3 Bf3 15.Bf3+=) 12...0-0=+ 13.h3 Bh5 14.0-0 Qa8 15.d4 b6 16.Qa6 Qa6 (better 16...Qd8!?=) 17.ba6+/- Ra8 18.Ra1 Ra7?? (better 18...Bf3 19.gf3 Nb8+/-) 19.Nb5+- Ra8 (19...Bb8 20.Na7 Bf3 21.gf3 Ba7 22.Rc1+-) 20.Nd6 1-0. BeepBeepImAJeep (2665) - Kcerov (2515), lichess.org, 2019.

6.e3 Bd6 7.Be2 a6 8.c4 ab5 9.ab5 Ra1 10.Ba1 cb5 11.cb5 Qc7 12.h3 (12.Bf6 gf6 13.Nc3=) 12...Bh5 (12...Bf3 13.Bf3 Nbd7 14.0-0=+) 13.0-0 (13.g4 Bg6+=) 13...Qc5 (13...Bf3 14.Bf3 Nbd7 15.Qe2=) 14.d4 (14.g4!? Bg6 15.g5+=) 14...Qb6 15.Nbd2 0-0 16.Ne5 (16.Qc2 Nbd7=) 16...Be2=+ 17.Qe2 Be5 (better 17...Rc8!?=+) 18.de5+= Nfd7 19.Bd4 Nc5? (better 19...Qa5+=) 20.Nb3!+- Nbd7 (20...Nb3 21.Bb6 Pinning (21.Bb6 Deflection)) 21.Rc1 (21.Nc5 Nc5 22.Rc1 Rc8+-) 21...Rc8? (better 21...Nb3 22.Bb6 Nc1+/-) 22.Qc2?? (better 22.Nc5 Nc5 23.Qb2+-) 22...Qb5=+ 23.Nc5 (worse 23.Bc5 b6-/+) 23...Nc5 24.Qa2 (24.Qb1!? Qb1 25.Rb1=+) 24...b6-/+ 25.Qa7 h6 26.Qe7 Qe8 (better 26...Qe2!?-/+) 27.Qe8= Re8 28.Bc5 bc5 29.Rc5 f6 (29...Rb8 30.g4=) 30.ef6+= gf6 31.Rc7 Rf8 (31...h5 32.Kh2=) 32.g4 (32.Re7 e5+/-) 32...Rf7+= 33.Rc8 Kg7 (33...Rf8 34.Rc6 Re8 35.Rc7+=) 34.Rc6 (better 34.Re8!?+/-) 34...Re7= 35.Kg2 Kf7 36.Rd6 Ra7 37.h4 Ke7 38.Rb6 Ra4 (38...Rd7 39.f4=) 39.Kg3 (39.Rb7 Kf8 40.Kg3+=) 39...Ra2 (better 39...Ra7!?=) 40.Rb7+/- Kd6 41.Rh7 Ke5 (41...e5!?+/-) 42.Rh6+- Ra1 (42...Ra3 43.Kg2+-) 43.Rh5 (better 43.f4 Kd6 44.Rf6+-) 43...Ke4+/- 44.Rh6 Ke5 45.Kf3 (45.f4!? Kd6 46.Rf6 Ke7+-) 45...Rh1 (45...Ra4 46.h5+-) 46.h5 f5?! (46...Rc1 47.Kg2+-) 47.g5 (47.Kg2 Rh4 48.f4 Kd6 49.gf5 d4+-) 47...Kd6 (47...Rh4+-) 48.Rh7 e5 49.g6 Ke6 50.Kg2 (50.g7!? Rg1+-) 50...Rh4 Black prepares d4 51.Kg3 (better 51.g7 Kf7 52.h6+-) 51...Rg4 52.Kf3 e4 53.Ke2 f4? (53...Kf6+-) 54.ef4 d4 55.Ra7 Rf4 (55...d3 56.Ke3 d2 57.Kd2 Kf6+-) 56.h6 (better 56.Ra6!? Ke7 57.g7 Kf7 58.Ra7 Kg8+-) 56...d3 57.Kf1 (better 57.Ke3 Kf5 58.Rf7 Kg6 59.Rf4 Kh6 60.Re4 d2+-) 57...e3?? (better 57...d2 58.Ra1 e3+-) 58.h7 (better 58.g7 e2 59.Ke1+-) 58...Rf2?? (better 58...e2 59.Ke1 Rh4 60.Ra6 Kf5 61.Ra5 Kg6 62.Ra6 Kh7-+) 59.Ke1?? (better 59.Kg1 d2 60.Ra1=) 59...d2 60.Kd1 Rf1 61.Ke2 (61.Kc2 d1Q 62.Kc3 Qd2 63.Kc4 Rc1 64.Kb3 Rb1 65.Kc4 Rb4 66.Kc5 Qc3) 61...d1Q 62.Ke3 Qe1 (62...Rf3 63.Ke4 Qd3) 63.Kd4 (63.Kd3 Rf3 64.Kc4 Qc1 65.Kb4 Qb2 66.Kc5 Rc3 67.Kd4 Qb4) 63...Qd1 (63...Rf4 64.Kd3 Qg3 65.Ke2 Rf2 66.Kd1 Qg1) 64.Kc4?? (64.Ke3 Rf3 65.Ke4 Qd3) 64...Qc2 (64...Rf4 65.Kc3 Qd4 66.Kc2 Rf2 67.Kb3 Rb2 68.Ka3 Qb4) 65.Kb5 (65.Kd4 Qd2 66.Kc4 Rc1 67.Kb3 Rb1 68.Kc4 Rb4 69.Kc5 Qc3) 65...Rb1 66.Ka6 (66.Ka5 Qa2) 66…Qa2 (66...Qa4) 0-1. BeepBeepImAJeep (2700) - Kcerov (2480), lichess.org, 2019.

6.e3 Bf3 7.Qf3 Be7 8.c4 0-0 9.Qd1 (9.Be2 dc4 10.Bc4 a6=) 9...Nbd7 10.Be2 dc4 11.Bc4 cb5 12.ab5 Nb6 13.Be2 Re8 14.0-0 Rc8 (14...Qd7 15.Bd4=) 15.d4 (15.Ra7!? Qd7 16.Bf6 Bf6 17.d4+/-) 15...Ra8+= 16.Nd2 Nfd5 17.Bf3 Bf6? (17...Qd7 18.Qe2=) 18.Ne4 (18.e4!? Nb4 19.e5+-) 18...Be7 19.Nc5 Bf6 (19...Nc4 20.Qe2 Nb2 21.Qb2+=) 20.Nb7 Qe7? (20...Qd7!? 21.Nc5 Qb5+=) 21.Na5 (21.Nc5 Be5+-) 21...Qb4 22.Qc2 (22.Qb3 Qb3 23.Nb3 Nc4+/-) 22...a6? (better 22...Qb5 23.Rfc1 Bg5+=) 23.ba6+- Ra6 24.Nc6 Qb5 (24...Ra1 25.Nb4 Nb4+-) 25.Be2 Ra1 (25...Nc4 26.Ra6 (worse 26.Qc4 Qc4 27.Bc4 Rc6+-; worse 26.Bc4 Rc6 27.Qh7 Kh7 28.Bb5 Rcc8+-) 26...Qa6 27.Qc4 (27.Bc4?! Qc6 28.Rc1 Rb8+/-) 27...Qc4 28.Bc4+-) 26.Bb5 (26.Ra1?! Nc4 27.Bc4 Qc6+/-; 26.Ba1?! Qa4 27.Qa4 Na4+-) 26...Rf1 27.Bf1 h6 (27...Rc8 28.Ba6 Ra8 29.Bb7+-) 28.Ne5 (better 28.e4!? Nf4+-) 28...Be5 29.de5 Rc8 30.Qb3 Rc6 (30...Rb8 31.Bd4 Nd7 32.Qa4+-) 31.g3 (31.Qb5 Rc8 32.e4 Rf8+-) 31...Rc5 (31...Nd7+-) 32.Bd4 Rc6 33.Bb5 (better 33.e4 Kh7+-) 33...Rc1 34.Kg2 Kh7 (34...Nc8 35.Qa3 Rc2 36.e4+-) 35.Bb6 Nb6 36.Bd3 (36.Bd3 Kg8 37.Qb6+-) 1-0. BeepBeepImAJeep (2780) - bermonster (2440), lichess.org, 2020.

5.e3 Bg7 6.c4 0-0 7.Nf3 e6 8.Be2 Re8 9.0-0 Nbd7 10.d4 Nh5 11.Nc3 e5 (11...Nhf6!?+=) 12.cd5+/- ed4 13.Nd4 cd5 14.Nd5 Nb6 (14...Nc5 15.Bf3 Ne4+-) 15.Nb6 Qb6 16.Bh5 gh5 17.Qh5 Be6 (17...Re5 18.Qh4+-) 18.Ne6 (18.Qg5 f6 19.Qg3 Rac8+-) 18...Re6 (18...Bb2 19.Ra2 Re6 20.Rb2+-) 19.Bg7 Kg7 20.Rad1 Rg6 (20...Re4 21.Rd7 Qf6 22.a5+-) 21.Rd4 (21.Qe5!? Qf6 22.Qe4 Rb8+-) 21...a6 22.g3 ab5 23.Qb5 Qb5 24.ab5 Ra5 25.Rd5 Rb6 26.Rb1 h6 27.h4 Kf6 28.e4 Ke6 29.Kg2 Rd6 30.Rd6 Kd6 31.Rd1 Kc5 (31...Ke5 32.Rd5 Ke4+-) 32.Rd5 Kc4 33.Rf5 (33.g4 Ra8+-) 33...Rb5 34.Rf7 Rb2 (34...Re5 35.f4 Re4 36.Rb7+-) 35.Rc7 Kd4 36.Rh7 (36.Kf3 Ke5+-) 36...Ke4 37.Rh6 b5 (37...Kf5 38.Rh5 Ke6 39.g4+-) 38.Rb6 b4 (38...Kd4 39.h5 Kc5 40.Rb8+-) 39.h5 b3 40.h6 Rb1 (40...Rd2+-) 41.h7 b2 42.h8Q Kd3 43.Qh7 Kc3 44.Qb1 (44.Qb1 Kd4 45.Qb2 Kc4 46.Qb4 Kd3 47.Rd6 Kc2 48.Rd2 Kc1 49.Qb2; 44.Qc7 Kd4 45.Rd6 Ke5 46.Qc5 Ke4 47.f3) 1-0. BeepBeepImAJeep (2505) - willysdiaz (1875), lichess.org, 2019.

5.e3 Bg7 6.Nf3 0-0 7.Be2 Re8 8.0-0 Nbd7 9.d4 Ne4 (9...a6 10.Nbd2=) 10.Nbd2+= f5 (10...Ndf6 11.c4=) 11.c4 e5 (11...Qa5 12.Ne4 fe4 13.Ne1+=) 12.cd5+/- cd5 13.Qb3 Nb6 14.Ne4 fe4 15.Ne5 Be6 16.a5 Nd7 17.f4 ef3 18.Bf3 Ne5 19.de5 d4 20.Qa3 (20.Qd3 Be5 21.Bd4 Rc8+-) 20...de3 (better 20...Be5!? 21.a6 Rc8 22.ab7 Qh4+/-) 21.Qe3+- Qe7 (21...Qd7 22.a6 Qb5 23.ab7+-) 22.a6 Rab8 23.ab7 (23.Qa7?! ba6 24.Qe7 Re7 25.ba6 Rb2+-) 23...Qb4 24.Bc3 Qb5 25.Rfb1 Qd7 26.Ra7 Bf5 27.Rb6 Qc7 28.Ra8 Be5 (28...Bd7+-) 29.Bd5 Kf8 30.Rb8 Qb8 31.Qh6 Ke7 32.Qh7 (32.Be5 Qe5 33.Qh7 Kd8 34.b8Q Qb8 35.Rb8 Bc8 36.Qg6 Re1 37.Kf2 Rc1+-) 32...Kd8 33.Rd6! Qd6 (33...Qd6 34.Ba5 Mate attack; 33...Bd6 34.Ba5 Promotion) 34.Ba5 Qc7 35.b8Q (35.b8Q Bc8 36.Bc7 Bc7 37.Qhc7) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

4.a4 Nb8 5.e3 (---> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6 5.a4).

4.bc6 e5?! 5.cb7 Bb7 6.Be5 Bc5 (6...Bd6 7.Bd6 Qd6 8.e3+-) 7.d4 Bb4 8.c3 0-0 (8...Bd6+-) 9.cb4 Re8 (9...Nd7 10.Bf4+-) 10.e3 Ne4 (10...Nd7 11.Bf4+-) 11.Nd2 Nf2 (11...a5 12.b5 c5 13.bc6 Bc6 14.Rc1+-) 12.Kf2 Qh4 13.Bg3 Qf6 14.Qf3 Re3 15.Qf6 Rae8 16.Qf5 g6 17.Qf4 c6 18.Qe3 Re3 19.Ke3 a6 20.h4 f5 21.Ngf3 h6 22.Nb3 g5 23.hg5 hg5 24.Ng5 Kg7 25.Nc5 Bc8 26.Be5 1–0. lokia – twandio, net–chess.com, 2004.

5.e3 d4? 6.c4 (better 6.Bd4 e6+-) 6...de3 (6...e5 7.ed4 ed4 8.Nf3+-) 7.fe3 Ne4 8.Nf3 Ba6 (8...Rb8 9.Ba3+-) 9.Nc3 Nc5 (9...Rb8 10.Rb1 Nc3 11.Bc3 (11.dc3?! Qd1 12.Kd1 e6+-) 11...Rb1 12.Qb1+-) 10.Ne5 e6 (10...Qd6 11.d4 Rb8 12.Rb1+- (12.dc5?! Qe5 13.Qd2 Qc5+-)) 11.Nc6 (better 11.Qf3 f6 12.Qc6 Ke7 13.Qc5 Qd6 14.Qa5+-) 11...Qh4 12.g3 Qf6 (12...Qg5 13.Qf3 Bb7 14.Nb5+-) 13.Na4 e5 14.Ne5 (better 14.Nc5 Qc6 15.Na6 Qa6 16.Be5+-) 14...Qd6 (14...Bb7 15.Rg1 Ne4+-) 15.Qf3 (better 15.Nc5 Rb8 16.Bd4 f6 17.Qh5 g6 18.Ng6 hg6 19.Qh8 f5+-) 15...Bb7 16.Qf7 Kd8 17.Nc5 Be7 18.Nb7 Kc8 19.Nd6 Bd6 (19...cd6 20.Qd5 de5 21.Qc6 Kd8 22.Bh3 Rf8 23.Qd7) 20.Qd7 Kb8 21.Nc6 (21.Qb5 Kc8 22.Bh3 Kd8 23.Qd7) 21...Kb7 22.Bg2 (22.Na5 Kb8 23.Qb5 Kc8 24.Bh3 Kd8 25.Qd7) 22...Kb6 (22...Bg3 23.hg3 a6 24.Bd4 a5 25.Na5 Kb8 26.Rb1) 23.Bd4 Ka6 (23...Bc5 24.Bc5 Ka6 25.Nb4 Ka5 26.Qb5) 24.c5 (24.Nb4 Bb4 25.Qb5) 24...Bf8 (24...Bg3 25.hg3 Kb5 26.Na7 Kb4 27.Qb5 Ka3 28.Qb3) 25.Bf1 Kb7 26.Rb1 1–0. zomboeb (1620) – scarface_mtb (1655), lichess.org, 2021.

5.e3 Bg4 6.Be2 Be2 7.Ne2 e6 8.0-0 Bb4 (8...Bd6 9.Nd4+-) 9.a3 Bc5 (9...Bd6 10.Nd4 c5 11.Nc6 Bh2 12.Kh2 Qd6 13.Ne5+-) 10.d4 (10.c4 Be7+-) 10...Bb6 (10...Bd6 11.Nd2+-) 11.Nd2 0-0 12.c4 dc4 (12...c5 13.Rc1 Qe7 14.cd5 cd4 15.Nd4 Nd5 16.Nc6+-) 13.Nc4 c5 14.dc5 Bc5 15.Nd4 Bd4 16.Qd4 Qd4 17.Bd4 Rad8 (17...Nd7 18.Rfb1 Rfd8 19.Rb7+-) 18.Ba7 Ra8 19.Bd4 Ne4 20.Rfc1 Nd2 (20...c5 21.Be5 f6+-) 21.Nd2 Rfd8 22.Rc7 h6 (22...e5 23.Bc3+-) 23.h3 (better 23.a4 e5 24.Bc3 f6+-) 23...Kh7 (23...e5 24.Bc3+-) 24.Rf7 Ra4 (24...Rg8 25.Rb1 Ra3 26.Rbb7+-) 25.Rc1 (better 25.Rg7 Kh8 26.Rd7 Rd4 27.Rd4+-) 25...Ra3 26.Rcc7 (26.Rg7 Kh8 27.Rd7 e5 28.Rd8 Kg7 29.Rc7 Kg6 30.Rd6 Kh5 31.Nf3 Ra1 32.Ba1 e4 33.Rc5) 26...Ra1 27.Kh2 (27.Ba1 e5 28.Rg7 Kh8 29.Be5 Rd7 30.Rgd7 Kg8 31.Rd8) 27...Rd1 (27...Re8 28.Rg7 Kh8 29.Rge7 e5 30.Re8) 28.Rg7 Kh8 29.Rh7 Kg8 30.Rh8 1-0. BeepBeepImAJeep (2645) – KUROMER, lichess.org, 2017.

5.Nf3 e6+-.

5.Bf6 ef6 6.e3+-.

5.Bf6 gf6 6.Nf3 (6.e3 e5+-) 6...Bh6 (6...e5 7.e3+-) 7.e3 Rg8 (7...e5 8.c4+-) 8.Nd4 (8.d4 e5+-) 8...Qd6 (8...Bg4 9.Qc1+-) 9.Qh5 Rg6 (9...Bf8 10.Qh7 Rg6 11.g3+-) 10.Bd3 Bg4 (10...f5 11.Bf5 Rg5 12.Qh3 Bf5 13.Nf5+-) 11.Qh4 f5 12.h3 (12.Bf5?! Bf5 13.Nf5 Qe5+-) 12...Bg5 (12...Bg7 13.hg4 Rh6 14.Nf5 Rh4 15.Nd6 cd6 16.Rh4 Ba1 17.Rh7 Rb8+-) 13.Qh7 (13.hg4?! Bh4 14.Rh4 Qf6 15.Rh7 e5=+) 13...0-0-0 (13...Bf6 14.hg4 e6 15.gf5 ef5 16.g3+-) 14.hg4 Rh6 (14...Rf6 15.Ba6 Kd7 16.Rh5 Be3 17.de3 fg4 18.Rf5+-) 15.Rh6 (15.Rh6 Qh6 16.Qf5 Kb7 17.Na3+-) 1–0. DEFFM – flynnie, freechess.org, 2018.

4.e3 b6 5.Nf3 e6 6.c4 Be7 7.Be2 0-0 8.0-0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 c6 12.Qc2 cb5 (12...dc4 13.Ng5 g6 14.Qc4 cb5 15.Qh4=) 13.cb5 Qc8 14.Qb2 Qb7 15.Ne5 Bd6 16.Nd7 (16.Rc1 Rc8=) 16...Qd7 (16...Nbd7 17.Nc3 Ra8=) 17.Bg4 (17.Rc1 Rc8=) 17...Rc8 (17...Bh2 18.Kh2 Ng4 19.Kg1-/+) 18.d3 (18.Be2!?=+) 18...Rc5 19.Na3 (better 19.f4-/+) 19...Qc7 (better 19...Bh2!? 20.Kh2 Ng4 21.Kg1 f5-/+) 20.Be2 (20.d4 Ng4 21.dc5 Bh2 22.Kh1 Be5=+) 20...Qa7 21.d4 (21.Qb3 Nbd7=) 21...Rc8=+ 22.Nc2 (22.Nb1 Nbd7=) 22...Nbd7 (better 22...Qc7!? 23.Rc1 Bh2 24.Kf1 Bd6-/+) 23.Nb4 Bb4 (23...Qc7 24.h3=) 24.Qb4 Ne4 25.f3 Ng5? (better 25...Nef6+=) 26.h4+- Rc2 27.Bd1 Rc4 (27...Rc1 28.Bb2 Rb1 29.Qc3 (29.hg5 Qa2 30.Qa3 Qb2 31.Qb2 Rb2=+) 29...Nf3 30.Bf3 Rf1 31.Kf1+-) 28.Qb2 (28.Qe7 Nh3 29.gh3 Qc7+-) 28...Qc7 (28...Nf3 29.Bf3 Ra4 30.e4+-) 29.hg5 Qg3 30.Qb3 Qg5 31.Bb2 Nf6 32.Be2 Rc8 33.f4 (33.Rc1!? Rc1 34.Bc1 Qg3+-) 33...Qg3 34.Rf3?? (better 34.Bf3+-) 34...Qe1= 35.Bf1 Ne4 (better 35...Ng4!? 36.Qd3 Qh4=) 36.Qd3 (better 36.Qa3 Nd2 37.Rf2 Nf1 38.Rf1+-) 36...Rc1?? (better 36...Ra8+-) 37.Bc1+- Qc1 38.Kh2 (38.f5 h6+-) 38...Nf6 (38...f5 39.Kh1+-) 39.Be2 Ng4 40.Kg3 Qe1 (40...Nf6 41.Rf1 Qc7+-) 41.Kg4 f5 (41...Qg1 42.Kg3 Qc1 43.e4+-) 42.Kh3 g6 (42...Qc1 43.Rf1 Qb2 44.Rb1+-) 43.Qd1 (better 43.Rf1 Qb4 44.Qc2+-) 43...Qh1 (43...Qc3 44.e4! Qc7 45.ed5 ed5 46.Qb3+-) 44.Kg3 (44.Qh1 h6 45.Qc1 g5 46.fg5 Kg7 47.Qc7 Kf8 48.gh6 Ke8 49.h7 e5 50.h8Q) 44...h6 (44...Qh6+-) 45.Rf1 (better 45.Qh1 h5+-) 45...Qf1 46.Qf1 g5 47.Kf2 gf4 48.ef4 Kf7 49.Kf3 (49.Qc1 Kf6 50.Bh5 Kg7 51.Qc7 Kg8 52.Qf7 Kh8 53.Bg6 e5 54.Qf8) 49...Kf6+- 50.Qh1 h5 51.Qh5 Ke7 0–1. AhmedSultanov (1830) – YouWin0505 (1795), lichess.org, 2020.

4.e3 c5 5.h3 a6 6.a4 ab5 7.Bb5 e6 8.Nf3 Bb5 9.ab5 Nbd7 (9...Ra1 10.Ba1 Bd6 11.0-0=+) 10.0-0 (10.Ra8 Qa8 11.0-0 Bd6=) 10...Be7 (10...Ra1 11.Ba1 Bd6 12.c4=+) 11.Nc3 (11.Ra8 Qa8 12.Nc3 0-0=) 11...0-0 12.Ne2 (12.Ra8 Qa8 13.Qe2 Qa5=) 12...c4 (12...Qb6 13.Nc3=+) 13.Nc3 Ra1 14.Qa1 Nb6 (14...Qc7 15.d3=+) 15.Na4 Ne4 (15...Nc8!?=) 16.Nb6 (16.Bg7 Re8 17.Bd4 Nd7+-) 16...Qb6+= 17.Bg7 Rd8 18.Bd4 (18.d3 f6 19.de4 Kg7 20.ed5 Rd5+-) 18...Bc5 (18...Qb5!? 19.Rb1 Qa6+=) 19.Bh8 f6 (19...Bf8!? 20.d3 Nd6+-) 20.Bf6+- Nf6 (better 20...Re8+-) 21.Qf6 Qd6 (21...Rf8 22.Qg5 Kh8 23.Qe5 Kg8 24.Ng5+-) 22.Qg5 (22.Ng5!? Rf8 23.Qe6 Qe6 24.Ne6 Rc8+-) 22...Kh8 23.Qf6 Kg8 24.Ra1 (better 24.Ng5!? Rf8 25.Qe6 Qe6 26.Ne6 Rc8+-) 24...Rf8 25.Qg5 Kf7?? (25...Kh8+-) 26.Ne5 Ke8 (26...Qe5 27.Qe5 h6+-) 27.Ra8 Qd8 28.Rd8 (28.Qd8) 1–0. Plunkett,Louis – Kiely,Martin, FICGS, 2013.

4.e3 e5 5.Be5 Bb4 6.c4 dc4 7.Bc4 0-0 8.Nf3 Bg4 9.0-0 Nbd7 10.Bb2 Re8 (10...Nb6 11.Be2+/-) 11.Bf7! Kf7 12.Qb3 Re6?? (better 12...Kg6 13.Qb4 Bf3 14.gf3 Ne5 15.Be5 Re5+/-) 13.Ng5+- (13.Ng5 Kf8 14.Ne6 Be6 15.Qe6+-; 13.Qb4?! Bf3 14.gf3 Nd5+/-) 1-0. BeepBeepImAJeep - Grood86, lichess.org, 2018.

5.c4 ab5 6.cb5 e6 (6...Bf5 7.Bf6 (7.Be2 e6 8.Nf3 Bd6 9.0-0 0-0 10.d3 Bg4 11.Nbd2 c5 12.h3=; 7.Ne2 Nbd7 8.Ng3 Bg6 9.f4 e6 10.Be2 Ne4 11.Ne4 de4 12.0-0=; 7.Nf3 e6 8.Be2 Bd6 9.0-0 0-0 10.d3 Bg4 11.Nbd2 c5 12.h3=) 7...ef6 8.Nf3 Bd6 9.Be2 0-0 10.Nc3 Be6 11.0-0 Ra3 12.Qc2=; 6...Ra5 7.a4 (7.Bc3 Ra8 8.Nf3 Bg4 9.h3 Bf5 10.d3 Bd7 11.a4 e6 12.Ne5=; 7.Qf3 Bg4 8.Qf4 Nbd7 9.Bc3 Ra8 10.f3 Bh5 11.Bf6 Nf6 12.b6-/+; 7.Qb3 Bf5 8.Nf3 e6 9.Nd4 Bg6 10.Be2 Nbd7 11.0-0 Nc5 12.Qd1+=) 7...e6 8.Nf3 c6 9.Bc3 Ra7 10.Bd3 Ne4 11.0-0 Nc3 12.Nc3=; 6...c5 7.Qc2 (7.Nf3 e6 8.Be2 Be7 9.a4 0-0 10.0-0 Bd6 11.d3 Ng4 12.h3=; 7.a4 Bf5 8.Ne2 Nbd7 9.Ng3 Bg6 10.f4 e6 11.Be2 Bd6 12.0-0+=; 7.bc6 Nc6 8.Nf3 e6 9.Be2 Bd6 10.0-0 0-0 11.Nc3 e5 12.Nb5+=) 7...e6 8.Nf3 Be7 9.Be2 c4 10.a4 Qa5 11.0-0 0-0 12.Ng5=) 7.Nf3 (7.Be2 c5 8.Nf3 Be7 9.0-0 Qb6 10.a4 0-0 11.d3 Na6 12.Nbd2=; 7.Be5 c5 8.Nc3 Be7 9.Nf3 0-0 10.Qc2 Ng4 11.Bf4 Ra3 12.Be2=; 7.Bd3 c5 8.Be2 Be7 9.Nf3 c4 10.Nc3 Qa5 11.a4 0-0 12.0-0+=) 7...Bd6 (7...c5 8.bc6 Nc6 9.Be2 Bd6 10.0-0 e5 11.d4 e4 12.Ne5+=) 8.Nc3 (8.Be2 0-0 9.0-0 c5 10.a4 Qe7 11.Ne5 Bc8 12.a5=) 8...0-0 (8...e5 9.Be2 0-0 10.0-0 c5 11.bc6 Nc6 12.Nb5+=) 9.Be2 Qe7 (9...e5 10.0-0 c5 11.bc6 Nc6 12.Nb5+=) 10.d4 c5 (10...c6 11.0-0 Rc8 12.Ne5+=) 11.bc6 (11.dc5 Bc5 12.0-0=) 11...bc6 (11...Nc6 12.0-0+=) 12.0-0 Na6 13.Ba6 Ra6 14.Qe2 Rfa8 15.Rfc1 h6 16.Ne5 Be8 17.f4 c5 18.h3 Rb6 19.dc5 Bc5 20.Kh1 Be3! 21.Qe3 Rb2 22.Rab1 Rab8 23.Rb2 Rb2 24.Ra1 Qb7 25.Nd3?? (better is 25.Qf3-/+) 25…d4!-+ (25...d4 26.Nb2 de3-+) 0–1. Kosar,Matej (1720) – Chladek,Va (2045), 9th Niki Open, 2011.

5.c4 ab5 6.cd5 A) 6...b4 7.Bf6 (7.Qf3 Ra5 8.Bc4 Bg4 9.Qf4 Nbd7 10.a3 e5 11.de6 fe6 12.ab4+=; 7.Bc4 b5 8.Bb3 e6 9.de6 fe6 10.Nf3 c5 11.Ne5 c4 12.Qf3+=; 7.Qb3 e6 8.de6 Be6 9.Bc4 Bc4 10.Qc4 Nbd7 11.Nf3 Bd6 12.0-0=) 7...ef6 8.d4 Bd6 9.Nd2 0-0 10.Bd3 Na6 11.Qc2 h6 12.Ngf3=; B) 6...Na6 7.Bf6 (7.Qb3 Nc5 8.Qc2 Na4 9.Bf6 ef6 10.Nc3 c6 11.Nf3 Nc3 12.dc3=; 7.Nf3 Nd5 8.Qb3 e6 9.d4 b4 10.e4 Nf6 11.Bd3 Bc6 12.Nbd2+=; 7.Bd4 Nd5 8.Qb3 Ndb4 9.Nf3 c6 10.a3 c5 11.Bc5 Nc5 12.Qb4+=) 7...ef6 8.Nf3 Be7 9.d4 0-0 10.Qb3 c6 11.Be2 Nb4 12.0-0=; C) 6...Nd5 7.Qb3 c6 8.Bb5 Be6 9.Be2 Nb6 10.Qc2 Ra2 11.Ra2 Ba2 12.Nc3+=.

5.c4 dc4 6.ba6 A) 6...b5 7.a4 (7.d3 cd3 8.a7 Ra7 9.Bd3 c5 10.Nf3 c4 11.Be2 e6 12.0-0-/+; 7.Nf3 Na6 8.a4 c6 9.ab5 cb5 10.d3 cd3 11.Bd3 Nc5 12.0-0+=; 7.a7 Ra7 8.Nf3 e6 9.Ne5 Bc5 10.d3 Bb4 11.Nc3 Ra3 12.Rc1-+) 7...ba4 8.Bc4 e6 9.Nf3 Bd6 10.Qe2 Nd5 11.0-0 0-0 12.Bd4=; B) 6...Na6 7.Bc4 e6 8.Nf3 Nb4 9.Nc3 Bd6 10.d3 0-0 11.0-0 Ra5 12.a3=.

5.c4 dc4 6.b6 A) 6...Bc6 7.Nf3 (7.Na3 cb6 8.Nc4 b5 9.Ne5 e6 10.Ngf3 Bd6 11.Be2 0-0 12.0-0-/+; 7.f3 cb6 8.Bc4 e6 9.Ne2 b5 10.Bb3 Bd6 11.0-0 0-0 12.e4-/+; 7.Bf6 ef6 8.Qh5 g6 9.Qg4 cb6 10.Bc4 Nd7 11.f4 b5 12.Be2-/+) 7...Nbd7 8.Na3 Nb6 9.Nc4 Nbd7 10.Na5 Bd5 11.Bc4 Nb6 12.Bd5-/+; B) 6...Nd5 7.Na3 (7.Bc4 Nb6 8.Be2 e6 9.Nc3 Bc6 10.Nf3 Bd6 11.0-0 0-0 12.d3-/+; 7.d3 Nb6 8.dc4 e6 9.Nf3 Na4 10.Ba3 Ba3 11.Na3 Qe7 12.Qb3-/+; 7.bc7 Qc7 8.Nf3 b5 9.e4 Nb6 10.d3 Na4 11.Bd4 cd3 12.Bd3-/+) 7...Nb6 8.Nc4 Na4 9.Ne5 Nb2 10.Qb3 Be6 11.Qb7 Bd5 12.Qb2+=; C) 6...e6 7.Bc4 (7.Nf3 cb6 8.Bc4 b5 9.Be2 Nc6 10.0-0 Bd6 11.d4 0-0 12.Nbd2-/+; 7.Na3 Ba3 8.Ba3 Bc6 9.Rc1 cb6 10.Rc4 b5 11.Rc1 Bd5 12.Qc2-/+; 7.bc7 Qc7 8.d3 Bb4 9.Bc3 Nd5 10.Bb4 Nb4 11.Qd2 cd3 12.Bd3-+) 7...cb6 8.Nf3 b5 9.Bb3 Bc6 10.0-0 Bd6 11.d3 0-0 12.Qe2-/+; D) 6...cb6 7.Bc4 e6 8.Nf3 b5 9.Be2 Nc6 10.0-0 Bd6 11.Qc2 Nb4 12.Qb3-/+.

5.c4 dc4 6.Bc4 ab5 7.Be2 (7.Bb3 e6 8.Nf3 Bc6 9.0-0 Bd6 10.d3 0-0 11.e4 Nbd7 12.Nbd2-/+; 7.Bf1 b4 8.Nf3 e6 9.d4 Bd6 10.Bd3 0-0 11.Qe2 Nc6 12.0-0-/+; 7.Bd3 Bc6 8.Bf1 e6 9.Nf3 Bd6 10.d4 0-0 11.Bd3 b4 12.0-0-/+) 7...e6 8.Nf3 b4 9.a3 Ba4 10.Qc1 Bc6 11.0-0 Bd6 12.ab4 -/+.

4.a4 c6 5.e3 cb5 6.ab5 g6 (6...e5 7.Be2=+) 7.c4 dc4 8.Nf3 (8.Bc4 Nb6 9.Be2 Bg7=) 8...Bg7 (8...Nb6 9.Na3 Be6 10.Bd4=+) 9.Bc4= 0-0 10.0-0 Nh5 (10...Nb6 11.Be2=) 11.d4 Ndf6 12.Nbd2 Nd7 13.Be2 Nb6 14.Ne5 Nf6 15.Rc1 Bf5 16.Ba3 Rc8 17.Nb3 Rc1 18.Qc1 Nfd5 19.Nc5 Qb8 (19...Bc8 20.e4 Nc7 21.Qe3+/-) 20.f4 (20.e4 Be5 21.de5 Be4 22.Ne4 Qe5+-) 20...Re8 (20...g5 21.Bb2 Rc8 22.fg5 Be5 23.de5+/-) 21.Bf3 (21.e4 Be4 22.Ne4 f6+-) 21...e6 (21...Bc8+/-) 22.Ncd7?? (22.e4 f6 23.Ned7 (23.ed5?! fe5 24.de5 ed5+/-) 23...Nd7 24.Nd7+- (24.ed5?! e5=; 24.ef5?! Nc5 25.Bd5 Qd8+=)) 22...Nd7= 23.Nd7 Qd8 (23...Qc8 24.Ne5 Be5 25.fe5=) 24.Ne5 (24.Nc5 b6 25.Nb7 Qd7+=) 24...Be5 (24...f6!? 25.Nc4 Bd3=) 25.fe5 h5?? (better 25...Bd3 26.Rf2 Qa5+=) 26.e4+- Qb6 (26...Nb6 27.ef5 Qd4 28.Kh1 ef5 29.Bb7 Qe5+-) 27.Bc5 (27.ed5?! Qd4 28.Kh1 ed5+-) 27...Qb5 28.ef5 b6 29.fg6 bc5 (29...fg6 30.Bd5 ed5+-) 30.gf7 Kf8 31.fe8Q (31.Be2 c4 32.Bh5 Ke7 33.Qg5 Kd7 34.fe8Q Kc7 35.Qgd8 Kb7 36.Qb5 Nb6 37.Bf3) 31...Ke8 32.Bh5 (32.Qh6 Ne7 33.Bh5 Kd7 34.Qf8 Qf1 35.Kf1 Kc7 36.Qe7 Kb6 37.Qc5 Ka6 38.Be2 Kb7 39.Qe7 Kb6 40.Qd6 Ka5 41.Qc5 Ka4 42.Bd1) 32...Ke7 (32...Kd7 33.Rf7 Kc6+-) 33.Qg5 (33.Rf7 Ke8 34.Rh7 Kd8 35.Qg5 Nf6 36.Qf6 Kc8 37.Qf8 Qe8 38.Qe8) 33...Kd7+- 34.Rf7 (34.Qg7 Ne7 35.Qf8 Qf1 36.Kf1 Kc6 37.Qe7 Kb6 38.Qc5 Ka6 39.Be2 Kb7 40.Qe7 Kb6 41.Qd6 Ka5 42.Qc5 Ka4 43.Bd1) 34...Kc6 35.Qd8 Qb1 36.Rf1 Qe4 37.Be8 Kb7 38.Qd7 (38.Rf7 Ka6 39.Qc8 Kb6 40.Qc5 Ka6 41.Ra7) 38...Ka6 39.Qb5 1-0. BeepBeepImAJeep (2560) - mag_gs (1980), lichess.org, 2018.

4.a4 e6 5.e3 (5.Nf3 Bd6=+) 5...Bd6 6.Na3 (6.Nf3 e5=+) 6...0-0-/+ 7.c4 Qe7 (7...c5 8.Nf3-/+) 8.Nf3 a6 (8...Rd8 9.cd5 ed5 10.Be2=+) 9.Be2 Nb6 (9...e5 10.cd5 Nd5 11.Nc4=+) 10.d3 (10.cd5!? Nbd5 11.0-0=) 10...Bb4-/+ 11.Nd2 (better is 11.Kf1!?-/+) 11...dc4-+ 12.dc4 (better is 12.Nab1 Rd8 13.Qc2 cd3 14.Bd3-+) 12...Rd8 13.Bf6 (13.Nab1 Ne4 14.Bd4 e5-+) 13...Qf6 (13...gf6?! 14.Nab1-/+; 13...Rd2 14.Be7 Rd6 15.Kf1 Rd1 16.Rd1 Be7 17.a5+/–; 13...Bd2?! 14.Qd2 Qf6 15.Qc1 Na4 16.0-0-/+) 14.0-0 (14.Ra2 ab5 15.Nab1 Ra4 16.Ra4 ba4 17.Qc2-+) 14...Rd2 15.Qc1 Re2 16.Qd1 Rd2 17.Qc1 Na4 18.Nc2 Qc3 19.Ra4 Rc2 20.Qd1 Rd2 21.Qb1 a5 22.Rd1 b6 23.Ra2 Rd1 24.Qd1 Qe1 25.Qe1 Be1 26.Ra1 Bb4 27.Rd1 Bd6 28.e4 e5 29.g3 Bb7 30.f3 f6 31.Kf2 Rd8 32.Ke2 Be7 33.Rc1 Rd4 34.h4 Bb4 35.Ke3 Bd2 36.Ke2 Bc1 37.f4 Kf7 38.fe5 fe5 39.Kf3 Be4 40.Kg4 Kg6 41.h5 Kf6 42.Kh4 Bg5 43.Kh3 Bf5 44.g4 Bg4 45.Kg2 Rd3 46.Kh2 Kf5 47.Kg1 Kf4 48.Kf1 Kf3 (49.Ke1 Bh4 50.Kf1 Rd1; 48...Kg3 49.c5 Rd1) 0–1. debit – Krapulik, Live Game Caissa's Web, 2005.

4.e3 a6 5.c4 ab5 6.cb5 e5 7.a4 Bd6 8.Nf3 e4 9.Nd4 Ne5 10.Be2 0-0 11.0-0 c5 12.bc6 bc6 13.f4 ef3 14.Nf3 Nf3 15.Bf3 (better 15.Rf3!? Ng4 16.Rh3=+) 15...Ba6-/+ 16.Be2 Be2 17.Qe2 Qb6?? (better 17...Bh2 18.Kh2 Qb8 19.Kg1 Qb2-/+) 18.Bf6+/- gf6 19.Nc3 (worse 19.Rf6 Qb2 20.Qg4 Kh8-/+) 19...Be5 (19...Qb4 20.Rab1 (20.Rf6?! Bh2 21.Kf1 Qh4 22.Rc6 d4=) 20...Qh4 21.g3+/-) 20.Rab1 (20.d4 Bd6+-) 20...Qa6 (20...Qc7 21.Qg4 Kh8 22.Qh4 Bc3 23.dc3+=) 21.d4 (21.Qa6 Ra6 22.d4 Bc7+/-) 21...Qe2+/- 22.Ne2 Bd6 23.Rf6 Rfd8 24.Nc3 Kg7 25.Rf3 Rab8 26.Rc1 Rb3 27.Ne2 Rc8 (27...Rb2 28.Ng3 Bg3 29.Rg3 Kf8 30.Rc6 Ra8+-) 28.Nf4 (better 28.e4!? Rf3 29.gf3+-) 28...Bf4+= 29.ef4 (29.Rf4 Re3 30.Ra1 c5+=) 29...Rf3 30.gf3 Kf6 31.Kf2 Kf5 32.Ke3 (32.a5 Ra8+=) 32...Re8 33.Kd3 Re6 (33...Ra8 34.Rc6 Ra4 35.Rd6 Ra3 36.Ke2 Ra2 37.Ke3 Ra3 38.Kf2=) 34.a5+/- Kf4 35.a6 Re7 36.Rc6 Kf3 37.Rf6 Kg4 (37...Kg2+/-) 38.Rh6 (better 38.Kc3!?+-) 38...f5+= 39.Rd6 (39.Rd6 f4 40.Rd5+=) 1-0. BeepBeepImAJeep (2720) - Mayjin (2170), lichess.org, 2016.

4.e3 e5 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.e3 g6 5.c4 e6 6.Nh3 (6.Nf3 Bg7=) 6...Bg7 7.d4 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 0-0 11.Be2 Nb6 (11...dc4 12.Nd2=) 12.cd5 (12.c5 Nbd7+=) 12...Nbd5 (12...ed5 13.Nf4=) 13.Nc3 (13.Nd2 Bh6=) 13...Nc3 14.Bc3 Ne4 15.Bb4 Re8 16.0-0 (better 16.Qc2 Nf6 17.Nf4=) 16...c6?? (better 16...e5 17.de5 Bh3 18.Qd8 Rd8 19.gh3 Be5=) 17.Qc2+- f5 (17...Nf6 18.bc6 bc6 19.Qc6+-) 18.bc6 bc6 19.Qc6 Bd7 20.Qc2 Qb8 21.Qb3?? (21.Rb1 Rc8 22.Qd3 Rc6+-) 21...Qb6?? (better 21...Nd2! 22.Qa3 Nf1 23.Bf1 Qa8=+) 22.Bc4 Rb8 23.Rb1 Kh8 (23...Rc8!?+-) 24.f3+- Nd6?? (24...Nf6 25.Ng5 Nd5 26.Bd5 ed5 27.Qd5 Be8+-) 25.Bd6 Qb3 26.Rb3 Rc8 27.Be5 (better 27.Rb8+-) 27...Be5 28.de5 Rc4 29.Nf4 (29.Rb7 Rc1 30.Kf2 Rc2 31.Kg3 Rd2+-) 29...Kg8 30.Rb6 (30.Rb7 Rc1 31.Kf2 Bc8+-) 30...Kf7 31.Kf2 Rc2 32.Kg3 Rc5 33.Nd3 Rd5 (33...Rc3 34.Nb2 Ke7+-) 34.Rb3 (34.Rd6 Bb5 35.Rd5 ed5+-) 34...g5 (34...Bb5 35.Nf2 Re5 36.Rc3=) 35.Kf2 (35.e4 fe4 36.fe4 Ra5+-) 35...h5 (35...Bb5 36.e4 Rd3 37.Rb5 fe4 38.fe4+=) 36.Ke2 (36.e4 fe4 37.fe4 Rb5+-) 36...Ba4 37.Ra3 Bc2 (better 37...Bb5 38.f4 h4+=) 38.Kd2 (better 38.f4!?+-) 38...Bd3= 39.Rd3 Re5 40.Rd4 (40.f4 Re4 41.fg5 Rg4=) 40...Kf6 41.h3 (41.h4 Ra5 42.hg5 Kg5=) 41...Rd5 (41...Ra5 42.Ke2=+) 42.Rd5= ed5 43.Kd3 (43.g3 h4 44.g4 f4 45.ef4 gf4+-) 43...Ke5 (43...f4 44.Kd4 fe3 45.Ke3=) 44.g3= f4 45.gf4 gf4 46.ef4 Kf4 47.Kd4 Kf3 48.Kd5 Kg3 49.Ke5 h4 50.Kf5?? (better 50.Ke4=) 50...Kh3-+ 51.Kg5 Kg3 52.Kf5 h3 53.Ke5 h2 54.Kd5 h1Q 55.Kd6 Qe1 56.Kd5 Qe3 57.Kd6 (57.Kc4 Kf4 58.Kd5 Qe4 59.Kd6 Qd3 60.Kc7 Qa6 61.Kd7 Ke5 62.Kc7 Kd5 63.Kb8 Qc6 64.Ka7 Qb5 65.Ka8 Kc6 66.Ka7 Qb7) 57...Kf3 (57...Qc3 58.Ke7 Qc5 59.Kd7 Kf4 60.Ke6 Qc6 61.Kf7 Kf5 62.Ke7 Qc7 63.Ke8 Ke6 64.Kf8 Qf7) 58.Kc6 (58.Kd5 Qc3 59.Ke6 Ke4 60.Kf7 Kf5 61.Ke7 Qc7 62.Ke8 Ke6 63.Kf8 Qf7) 58...Qe4 (58...Qd4 59.Kb5 Ke4 60.Kc6 Ke5 61.Kb7 Kd6 62.Ka6 Qb4 63.Ka7 Kc6 64.Ka6 Qb6) 59.Kc5 (59.Kd6 Qb7 60.Ke5 Qb5 61.Ke6 Ke4 62.Kd6 Qb6 63.Ke7 Ke5 64.Kf7 Qf6 65.Kg8 Qg6 66.Kh8 Qg3 67.Kh7 Kf6 68.Kh6 Qg6) 59...Qd3 60.Kc6 Ke2 (60...Qc4 61.Kb6 Ke4 62.Kb7 Kd5 63.Kb6 Qc6 64.Ka7 Qb5 65.Ka8 Kc6 66.Ka7 Qb7) 61.Kc5 Qd2 62.Kc6 Ke3 63.Kc5 Ke4 (63...Ke4 64.Kc6 Qd5 65.Kc7 Qa5 66.Kc6 Ke5 67.Kd7 Qb6 68.Kc8 Qa7 69.Kd8 Kd6 70.Ke8 Qe7; 63...Qd4 64.Kc6 Ke4 65.Kb7 Kd5 66.Kc7 Qa7 67.Kd8 Kd6 68.Ke8 Qe7) 0–1. AhmedSultanov – sjakkkatt (1625), lichess.org, 2019.

4.Nf3 e6 5.e3 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

5.c4 d4 6.e3 de3 7.de3 Bb4 (7...Ne4 8.Qc2 Bb4 9.Bc3 Nc3 10.Nc3-+) 8.Nc3 (8.Bc3 Qe7 9.Nf3-/+) 8...e4 (8...0-0 9.Qb3 Ba5 10.0-0-0-/+) 9.Qb3? (9.Nge2 0-0-/+) 9...Ba5 (9...Qe7 10.Ba3 Ba3 11.Qa3 Nc5-/+) 10.Ba3=+ Ne5 (10...c5!? 11.Nh3 0-0=+) 11.Rd1= Nd3 12.Bd3 ed3 13.Nf3 Ne4 14.Bb4 Nc3 (14...Bb4 15.Qb4 Bf5 16.0-0 Nc3 17.Qc3=) 15.Qc3 (15.Bc3 c5 16.0-0 0-0 17.Ba5 Qa5 18.Rd3 f6+-) 15...Bb4+= 16.Qb4 Bg4 (16...Bf5 17.Qc5 Bg6 18.Ne5+=) 17.c5 (17.Qc3 Bf3 18.gf3 0-0+=) 17...Bf3= 18.gf3 0-0 19.Rg1 (19.Qe4 c6 20.Rd3 Qa5 21.Ke2 cb5=) 19...Qf6 (19...Qd5 20.e4 Qh5 21.Rd3 Qh2 22.Rg5=) 20.Rd3+= Qf3 21.Rd7 Rad8?? (better 21...a6+=) 22.Qd4+- f6 (22...g6 23.Rd8 Rd8 24.Qd8 Kg7 25.Qd4 Qf6 26.Qf6 Kf6+-) 23.Rgg7 Kh8 24.Rh7 Kg8 25.Rdg7 1–0. GuestJKVR – GuestFWGY, freechess.org, 2020.

5.e3 (---> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6 5.a4).

5.Nf3 Bd6 6.e3 =+.

5.a4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Nbd7).

5.Nc3 e5 6.Bd3 Be7 7.Qf3? (7.bc6 bc6 8.Rb1 Rb8=+) 7...0-0 (7...e4!? 8.Ne4 de4 9.Be4-+) 8.Qh3 (8.Qg3 cb5 9.Bb5 d4 10.ed4 ed4=) 8...e4 (8...Nc5 9.Bf5 cb5 10.Bc8 Rc8 11.Nb5 Qb6-+) 9.Qg3?? (Better is 9.Be2-/+) 9...ed3-+ 10.e4 dc2 11.ed5 Re8 12.Nge2 cd5 13.Nd5 Bf8 14.Nc7 Ne4 15.Qf4 g5 16.Qe3 Qc7 17.0-0 Bd6 18.f4 Nef6 19.Qc3 Re2 20.Qc7 Bc7 21.fg5 Ne4 22.Rac1 Rd2 23.Rf5 Rd1 24.Rf1 Bb6 25.Kh1 0–1. Taulien,Christian – Ruprich,Tony, remoteschach.de, 2001.

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 d5).

4.a4 Bd6 (---> 3.a4 e6 4.b5 Bd6).

4.d4 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.d4).

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5).

4.e3 a6 5.a4 ab5 6.ab5 Ra1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1).

4.e3 Bd7 5.a4 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd7).

4.Nf3 c5 5.e3 b6 6.c4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

5.e3 ab5 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5).

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bd6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6).

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7).

5.e3 ab5 6.ab5 Ra1 7.Ba1 Nbd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7).

5.e3 Bd6 6.d4 0-0 7.c4 b6 8.Nf3 Bb7 9.Be2 Nbd7 10.0-0 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.d4).

5.Nf3 Bd6 6.e3 0-0 7.c4 Nbd7 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.a4).

5.e3 0-0 6.c4 dc4 7.Nf3 c6 8.Bc4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3 c6 8.a4).

5.e3 0-0 6.c4 c6 7.Nf3 b6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 b6).

5.e3 0-0 6.c4 c6 7.Nf3 dc4 8.Bc4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3 c6 8.a4).

5.e3 0-0 6.c4 c6 7.Nf3 Nbd7 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 Nbd7 8.Be2).

5.e3 0-0 6.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.a4).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5).

5.d4 Nbd7 6.c4 b6 7.a4 Bb7 8.Nf3 Bd6 9.Be2 0-0 10.0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.d4).

5.Nf3= Nbd7 6.c4 Bd6 7.Nc3 0-0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.Nc3).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6).

5.c4 0-0 6.Nf3 c6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c6).

5.c4 0-0 6.Nf3 Nbd7 7.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.d4).

5.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7).

5.Nf3 0-0 6.c4 c5 7.d4 b6 8.Be2 Nbd7 9.0-0 Bb7 10.Nbd2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.d4 Nbd7 10.Nbd2).

5.Nf3 Nbd7 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.c4 Nbd7).

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3).

5.e3 c6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c6).

4.a4 c5 5.e3 e6 6.c4 Bd6 7.Nf3 Nbd7 8.Be2 0-0 9.0-0 Qe7 10.d4 Rac8 11.Nbd2 cd4 12.Nd4 Bg6 13.Rc1 Ba3 (13...Rfd8 14.a5=+) 14.Qb3 Bb2 15.Qb2 Nc5 16.Qa3 Rfe8 17.cd5 Nd5 18.Nc4 e5 (18...Red8 19.Ne5=) 19.Nf3 (19.Ne5!? Be4 20.Nec6 bc6 21.Qc5 Qc5 22.Rc5 cb5 23.Rc8 Rc8 24.ab5+/-) 19...f6 (19...e4 20.Nd4=) 20.Rfd1 Bf7 21.h3 b6 22.a5 Qb7?? (better 22...Be6=) 23.ab6 (better 23.Nd6 Qc7 24.Nf7 Qf7 25.Bc4+-) 23...ab6 24.Nd6 Qa8? (24...Qd7 25.Nf7 Ra8+-) 25.Qa8 Ra8 26.Nf7 (26.Bc4!? e4 27.Nf7 Ne3 28.fe3 ef3 29.Nd6 Kf8 30.Ne8 Re8+-) 26...Ne3 27.fe3 (27.Nh6 gh6 28.fe3 Red8+-) 27...Kf7 28.Bc4 (28.Nd2!? Kf8+-) 28...Ke7 29.Rd2 Ra4 30.Rdc2 Rd8 31.Nd2 Ra3 32.Kf2 Rd7 33.Ke2 Rd6?! (33...h5 34.Nf3+-) 34.Rc3 (34.Bg8 Rd8 35.Bh7 Ra4+-) 34...Ra4 (34...Rc3 35.Rc3 h5 36.Bd3 Nd3 37.Rd3 Rd3 38.Kd3+-) 35.R1c2 (35.Bg8!? Rd2 36.Kd2 Ne4 37.Kd3 Nc3 38.Rc3 e4 39.Kd2 Rb4 40.Rc7 Kd8 41.Rg7 h5+-) 35...Rd7 36.Bb3 Ra1 37.Rc1?? (better 37.e4+-) 37...Rc1-+ 38.Rc1 Rd2! 39.Kd2 Nb3 40.Kc2 Nc1 41.Kc1 Kd6 42.Kc2 Kc5 43.Kd3 Kb5 44.Ke4 (44.Kc3-+) 44...Ka4 45.Kf5 b5 46.Ke6 b4 47.Kf7 b3 48.Kg7 b2 49.Kf6 b1Q 50.Ke5 Qd3 (50...Qb2 51.Kd5-+) 51.e4 Qe2 (51...Qg3 52.Kf5-+) 52.g4 Qf3 53.h4 (53.g5 Qg3 54.Kf5 Qh3 55.Kf4 Kb5-+) 53...Qg4 54.Kf6 (54.h5 Qh5 55.Kd4 Qd1 56.Ke3 h5-+) 54...Qh4 55.Kf5 h5 56.e5 Qg4 57.Kf6 h4 58.e6 h3 59.e7 Qh5 60.Kg7 (60.Ke6 h2 61.Kd7 Qb5 62.Ke6 h1Q 63.e8Q Qe8 64.Kf5 Qf3 65.Kg5 Qeh5) 60...Qe8 61.Kf6 (61.Kh7 h2 62.Kg7 h1Q 63.Kf6 Qe4 64.Kg7 Q4g6) 61...h2 62.Ke6 h1Q 63.Kd6 (63.Ke5 Qe7 64.Kd4 Qhe4 65.Kc3 Q7b4) 63...Qhc6 (63...Qec6 64.Ke5 Qhe4) 64.Ke5 Qe7 (64...Qeg6 65.e8Q Qgf6) 65.Kf5 (65.Kf4 Qce4 66.Kg3 Q7h4) 65…Qce4 0-1. BeepBeepImAJeep (2605) - Zubrrr (2615), lichess.org, 2017.

4.e3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.b5).

4.Nf3 e6 5.Bf6 Qf6 6.d4 c5 7.e3 cd4 8.ed4 Nd7 9.Bd3 Be4 10.Nbd2 Bb4 11.Rb1 Bf3 12.Qf3 Bd2 13.Kd2 Qd4 14.c3 Qa4 15.Rb2 Rc8 16.Bc2 Qa5 17.Re1 Nb6 18.Rb3 Qa2 19.Qd3 h6 20.Kc1 Na4 21.Qd4 0-0 22.Qd3 g6 23.Qd4 Rc4 24.Qa7 Rc3 25.Rc3 Qb2 26.Kd1 Nc3 27.Kd2 Rc8 28.Rc1 Na2 29.Ke1 Qc1 30.Bd1 Nc3 31.Qd4 Rc4 0–1. Bestia02c – Phalanx22, computer chess game, 2000.

5.e3 e5 6.h3 Bd6-/+ 7.c4 c5 8.Ne2 dc4 (8...0-0 9.cd5 Nd5 10.Ng3-/+) 9.Nec3 0-0 10.Bc4 (10.Qf3 Bd3 11.Qb7 Re8=+) 10...Nb6 11.Be2 Qc7 (11...Nbd5 12.Bc4 Bc7 13.Qf3=+) 12.a5 Nbd5 13.0-0 (13.Nd5 Nd5 14.Bc4 Nb4=+) 13...Rad8 (13...Nb4 14.d3-/+) 14.Qb3 (14.Nd5 Nd5 15.Nc3 Nc3 16.Bc3 c4=+) 14...Nc3 (14...Nb4 15.Rc1-/+) 15.Nc3 Qd7 16.b6 a6 17.Bc4 Bh3 18.gh3 Qh3 19.Be2 (19.Ne4 Ne4 20.Qd1-+) 19...e4 20.f4 ef3! 21.Rf3 (21.Bf3 Qh2 Mate attack; 21.Rf3 Qh2 Mate attack) 21...Qh2 22.Kf1 Bg3 (22...Qh1 23.Kf2 Ng4) 23.Rg3-/+ Qg3 24.Nd1?? (24.Qc2 Rfe8 25.Bd3 Qd6-+) 24...Rd2 (better 24...Ne4 25.Qc2 Nd2 26.Qd2 Rd2-+) 25.Nf2?? (25.Bf6 gf6 26.Ra2=+) 25...Ng4 (better 25...Nd5 26.Ra3 Ne3 27.Qe3 Qe3 28.Re3 Rb2-/+) 26.Ng4= Re2 27.Ke2 Qg4 28.Kd2 (28.Kf2 Rd8 29.Bc3 Qh4 30.Ke2 Qh2 31.Kf3 Qh3 32.Kf2 Qf5 33.Ke2 Qd3 34.Kf2 Rd5 35.Qd5 Qd5-+) 28...Rd8-/+ 29.Kc2 (29.Kc1 Qe2 30.Bc3 Qe3 31.Kb2 Qe2 32.Ka3 Rd3=+) 29...Qe2 30.Kb1 Rd1 (30...Rd3 31.Qa4 Qe3 32.Qg4 Qe1 33.Kc2 Qd2 34.Kb1 Qd1 35.Qd1 Rd1 36.Kc2 Ra1 37.Ba1-/+) 31.Ka2 (31.Bc1 Qd2 32.Qc4=) 31...Rd3 (better 31...Ra1 32.Ka1 Qe1 33.Ka2 Qa5 34.Kb1 Qb5-+) 32.Qb4?? (better 32.Qa4 Qe3 33.Rg1=) 32...cb4 33.Rc1 b3 (33...Ra3 34.Kb1 Qd3 35.Rc2 b3 36.Ba3 Qc2 37.Ka1 Qa2) 34.Kb1 Rd1 35.Rd1 Qd1 36.Bc1 Qc2 (36...Qc2 37.Ka1 Qc1) 0–1. TWW_LONDON (1925) – gunawanSE (1850), lichess.org, 2020.

5.e3 h6 6.c4 e6 7.cd5 ed5 8.Nf3 Bh7 9.d4 Bd6 10.Bd3 0-0 11.Bh7 Nh7 12.Nc3 Nhf6 13.0-0 Nb6 14.Rc1 Nc4 15.Nb1?? (better 15.Nd5!? Nb2 16.Nf6 Qf6 17.Qb3 Na4 18.Qa4=) 15...Re8 (better 15...Nb2!? 16.Qb3 Nc4 17.Nc3-+) 16.Nbd2?? (better 16.Qb3-/+) 16...Nb2-+ 17.Qc2 Nc4! 18.Nc4 dc4 19.Qc4 Rc8 20.a5 Ra8 21.Nd2 a6 22.b6 (22.Rb1-+) 22...Ra7 (better 22...cb6 23.ab6 Qb6-+) 23.ba7+- Qa8 24.Nb3 Qa7 25.Qc2 Qb8 26.Nd2 Qc8 27.Nc4 Bf8 28.Nb6! Qf5 (28...cb6 29.Qc7 Double attack (29.Qc8 Pinning; 29.Qc8 Deflection; 29.Qc7 Decoy; 29.Qc8 Clearance)) 29.Qc7 (better 29.Qf5 cb6 30.ab6+-) 29...Qa5 30.Nc8 (30.Qb7 Qb5+-) 30...Qh5? (better 30...Qc7 31.Rc7 Nd5+-) 31.Qb7 Ng4 (31...a5 32.Nb6+-) 32.h3 Nf6 33.Rc7 Nd5 34.Rd7 Nc3 35.Ne7 (35.Qa6?! Ne2 36.Kh2 Qf5+-) 35...Kh8 (35...Re7 36.Re7 Be7 37.Qe7+-) 36.Kh2 (better 36.Nd5 Ne2 37.Kh1 Kg8+-) 36...Qe2 37.Rh1 (better 37.Rc1 Qd2 38.Rc3 Qc3 39.Nf5+-) 37...Qf2+/- 38.Qf3 (38.Nd5 Ne4 39.Ra1+=) 38...Qa2?? (better 38...Qf3 39.gf3 Re7=+) 39.Nd5 Nb5?! (39...Nd5 40.Qf7 Ra8 41.Qd5 Qd5 42.Rd5 a5+-) 40.Rf7 (better 40.Rc1 Bd6 41.Kg1+-) 40...Bd6= 41.Nf4?? (better 41.Rf4=) 41...Qf7-+ 42.g3 Kg8 (42...g5 43.Qh5 Qh5 44.Nh5 Re3 45.Ra1-+) 43.Qd5 (43.Kg2 Bf4 44.Qf4 Qf4 45.ef4 Re2 (worse 45...Nd4 46.Ra1-+) 46.Kf3 Nd4 47.Kg4 g6-+) 43...Bf4 44.Qf7 Kf7 45.gf4 Re3 46.Rg1 Re6 47.Rg3 (47.d5 Rd6-+) 47...Rf6 48.Kg2 (48.d5 Rf4 49.Kg2 Rd4 50.Rf3 Kg6 51.Rg3 Kh7-+) 48...Nd4 49.Rf3 (49.Ra3 Ne2-+) 49...Nf5 (better 49...Nf3 50.Kf3 a5-+) 50.Rf2 Nh4 51.Kf1 Ng6 52.Re2 (52.f5 a5-+) 52...Nf4 53.Rd2 Ne6 (53...Ne6 54.Kg2 Rf5-+) 0-1. TimC (2225) - ZibbitVideos (2425), Rated Bullet game, lichess.org, 2015.

5.e3 Bd6 6.c4 0-0 7.Nf3 c6 8.Be2 dc4 9.Bc4 cb5 10.ab5 Nbd7 11.Be2 Rc8 (11...e5 12.0-0=+) 12.Nc3 a6 (12...Bb8!?=) 13.ba6 ba6 14.Ba6 Rb8 15.Ba3 Ba3 16.Ra3 Qe7 (16...Nc5 17.d4 Na6 18.Ra6=) 17.Ra1 Nc5 18.0-0 (better 18.Be2!?=) 18...Na6-/+ 19.Ra6 Bd3 20.Ra1 Bf1 21.Qf1 Qd6 22.d4 h6 (22...Rfc8 23.Na4-/+) 23.Na4 Rfc8 24.Nc5 Nd7 25.Nd7 Qd7 26.Ne5 Qd6 27.g3 Rc7 28.Nd3 Rc2 29.Nc5 Rbb2 30.Qe1 (30.Ra8 Kh7=+) 30...Rf2 (30...Re2 31.Qf1-/+) 31.Qf2=+ Rf2 32.Kf2 Qd5 33.Re1 (33.Ra4 Qf5 34.Kg2 Qc2 35.Kf3 Qh2 36.Ra8 Kh7-+) 33...Qa2 (33...Qf5!? 34.Kg2 e5 35.Re2 ed4 36.ed4 Qd5 37.Kf1 Qh1 38.Kf2 Qh2 39.Kf3 Qh5 40.Kf2 Qf5 41.Ke3-+) 34.Re2-/+ Qd5 35.Nd3?? (35.Re1 Qf5 36.Kg2-+) 35...g5?? (better 35...Qf5!? 36.Nf4 g5 37.e4-+) 36.Kg1 (36.Ke1 f6 37.Kd2 e5-/+) 36...Kg7 (36...Qb5 37.Nc1-+) 37.Nf2 (37.Nc5 e5 38.Rd2 f5-+) 37...f5-+ 38.e4 (better 38.Rd2-+) 38...Qd4 39.ef5 ef5 40.Kg2 f4 (40...Kf6!? 41.Re1-+) 41.Re4 Qd5 42.gf4 gf4 43.Kf3 Kg6 44.Kf4 Qf5 (better 44...Qd6!? 45.Kf3 Qh2 46.Re6 Kf7-+) 45.Ke3-/+ Qc5 46.Kf3 Qc3 47.Re3 Qf6 48.Kg2 Qc6 49.Rf3 h5 50.h3 Kh6 51.Kg3 Qd5 52.h4 Qe5 53.Kg2 Qd5 54.Nh3 (54.Kg3 Qd4 55.Rd3 Qe5 56.Kf3 Qf6 57.Kg3 Qg7 58.Kf3 Qf7 59.Kg3-/+) 54...Qd2 55.Kg3 Qd6 56.Nf4 Qe5 57.Rd3 Qe4 (better 57...Qe1 58.Kh3 Qf2 59.Rd6 Kh7 60.Rd7 Kg8 61.Rd8 Kf7-+) 58.Rd5?? (better 58.Rd6 Kh7 59.Re6-/+) 58...Qe3-+ 59.Kg2 Qf4 60.Rd3 Qg4 61.Rg3 Qh4 62.Rh3 (62.Re3 Qd4 63.Rf3 h4-+) 62...Qe4 63.Kh2 (63.Kf2 h4 64.Rf3 Qg4-+) 63...Kg5 Black intends h4 (better 63...h4 64.Ra3 Qe5 65.Kh3-+) 64.Rg3 Kh4 65.Rg2 (65.Rh3 Kg4 66.Rg3 Kf4 67.Rg8-+) 65...Qg2 66.Kg2 Kg4 67.Kh2 h4 68.Kh1 h3 69.Kh2 Kh4 70.Kh1 Kg3 71.Kg1 h2 72.Kh1 ½-½. BeepBeepImAJeep (2775) - No_signs_of_V (2510), lichess.org, 2020.

5.e3 Bd6 6.c4 dc4 7.Bc4 0-0 8.Nf3 c6 (8...a6 9.d3=+) 9.0-0 cb5 10.ab5 Nbd7 11.Be2 e5 12.d4 ed4 (12...e4!? 13.Nfd2 Qc7=+) 13.Nd4= Bg6 14.Nd2 Be5 (14...Ne5 15.Ba3 Ne4 16.Bd6 Nd6 17.Qa4+=) 15.N2f3 (15.f4 Bd4 16.Bd4 Be4+/-) 15...Bd6 16.Nd2 Ne5 17.Nc4 (better 17.Ba3!? Ne4 18.Ne4 Ba3 19.Ra3 Be4 20.f3+=) 17...Nc4=+ 18.Bc4 Qe7 (18...Bh2!? 19.Kh2 Qc7 20.Kg1 Qc4=+) 19.Be2 (19.Qe2 Rfc8=) 19...Rfd8 20.Bf3 Ne4 21.g3 Bc5 22.Qb3 (22.Bg2 Bd4 23.Bd4 Nc3=+) 22...Kh8 (better 22...Bd4!? 23.ed4 Nd2-/+) 23.Rfd1= h5 24.Rac1 h4 25.Qc4 hg3 26.hg3 Qf6?? (better 26...Bb4=) 27.Be4+- Be4 28.Qc5 Rd4 (28...Rd5 29.Qc3 Qg6+-) 29.Qh5 (29.ed4 Qh6 30.f3 Qe3 31.Kh2 Bf3-+) 29...Kg8 30.Bd4 (30.Rd4 Qe7+-) 30...Qe6 (30...Qf3 31.Qf3 Bf3 32.Rd3+-) 31.Qg5 (31.Ba7!? Bg6 32.Qg5 Qe4+-) 31...f6 32.Qh4 Bf3 33.Rd2 g6 (33...a6+-) 34.Qf6 (34.Rc7 Bh5 35.Bf6 Rc8 36.Rg7 Kf8 37.Qb4 Ke8 38.Re7 Kf8 39.Rd8 Rd8 40.Rd7 Kg8 41.Rd8 Qe8 42.Re8 Kf7 43.Qe7) 34...Qf6 35.Bf6 Kf7 (35...Rf8 36.Rd6 Bg4 37.Bd4+-) 36.Bh4 (36.Rd6!? Kg8 37.Rc7 Bg4+-) 36...Re8 (36...Ke6 37.Rc7 g5 38.Bg5+-) 37.Rd4 (37.Rd6 Kg7 38.Bg5+-) 37...Rg8 (37...Ke6+-) 38.Rf4 (38.Rc7 Ke6 39.Re7 Kf5 40.Rf4) 38...Ke6+- 39.Rf3 (39.Rf6!? Kd5 40.Rf3 Rg7+-) 39...g5 40.Bg5! Rg5 41.Rf4 (better 41.Rb1 Rg4+-) 41...Rb5 42.Rc7 a6 43.Rff7 Kd6 (43...b6 44.f4+-) 44.Rb7 Kc6 (44...Rb7 45.Rb7 a5 46.f4+-) 45.Rb5 ab5 46.g4 1-0. BeepBeepImAJeep (2555) - Oleg_sevastopol (2170), lichess.org, 2017.

5.e3 Bd6 6.c4 c6 7.Nf3 Nbd7 8.Be2 0-0 9.0-0 Qe7 (9...cb5 10.cb5 Rc8 11.Nd4=) 10.d4 Rad8 11.Nbd2 e5 (11...Bb4 12.Nh4=) 12.de5 (12.cd5 cd5 (12...Nd5? 13.e4+-) 13.de5 Ne5 (13...Be5? 14.Ne5 Ne5 15.Ba3+-) 14.Be5 Be5 15.Ne5 Qe5+=) 12...Ne5 13.Ne5 Be5 14.Be5 Qe5 15.Nf3 Qe7 16.Nd4 Bg6 (better 16...Be4!? 17.bc6 dc4 18.cb7 Qb7=) 17.bc6+/- bc6? (better 17...dc4 18.Rc1 Be4 19.cb7 Qb7+=) 18.Nc6+- Qc5 19.Nd8 Rd8 20.Rc1 d4 21.ed4 Rd4 22.Qb3 h6 23.Qe3 Qd6 (23...Ne4 24.Bd3+-) 24.c5 Qd8 25.c6 Rd6 26.c7 Qc8 27.Qe7 (27.Ba6 Ra6 28.Rfd1 Nd7 29.Rd7 Qd7 30.c8Q Qc8 31.Rc8 Kh7+-) 27...Rd7 28.Qd7! Nd7 (28...Qd7 29.c8Q Pinning; 28...Nd7 29.Ba6 Combination) 29.Ba6!! Qa6 30.c8Q Qc8 31.Rc8 Kh7 32.Rc7 Bf5 33.Ra7 Nc5 (33...Kg6 34.Rc7 Nf8 35.Rc6 f6 36.a5+-) 34.Ra5 Nb3 (34...Bc2 35.Rc5 Ba4 36.f4+-) 35.Rf5 g6 (35...Nd4 36.a5 Nf5+-) 36.Rb5 (36.Rf7 Kg8 37.Rc7 Nd2 38.Rfc1 Nf3 39.gf3 g5 40.Rd7 Kf8 41.Rc8) 36…Kg8 1-0. BeepBeepImAJeep (2605) - avp_chess (2160), lichess.org, 2016.

5.e3 Bd6 6.c4 Ne4 7.Nf3 (7.cd5 0-0=) 7...0-0=+ 8.Be2 c5 (8...dc4 9.Bc4 Nd7 10.0-0=) 9.0-0 Nd7 10.d3 Nef6 11.d4 (11.a5 Qc7=) 11...Rc8 12.Nbd2 cd4 13.Nd4 Bg6 14.cd5 ed5 15.Rc1 (15.a5 Ne5=) 15...Ne5 (15...Rc1 16.Qc1 Qa5 17.Qa1=) 16.Qb3 Qe7 17.h3 Ne4 18.Ne4 Be4 (18...de4!? 19.a5 Nd3 20.Rc8 Rc8=+) 19.f3+= Bg6 20.Qd5 (better 20.Rfd1=) 20...Rfd8?? (20...Nd3 21.Rc8 Rc8 22.Nf5 Bf5 23.Qf5 Qe3 24.Kh1 Qe2 25.Qc8 Bf8 26.Ba3 Qf1 27.Kh2+-) 21.Qb3?? (better 21.Rc8 Rc8 22.e4+/-) 21...Qg5?? (better 21...Nd3! 22.Rc8 Qe3 23.Kh1 Rc8 24.Bd3 Bd3=+ (24...Qd3?! 25.Qd3 Bd3 26.Rd1=)) 22.f4+- Qg3 23.fe5 Be5 24.Nf3 Bb2 25.Qb2 Be4 (25...Bf5 26.Qe5 Qe5 27.Ne5+-) 26.Rc8 (26.Bc4 Rc7+-) 26...Rc8 27.Qe5 Qe5 28.Ne5 Rc2 29.Bd3 (better 29.Bf3 Bf3 30.Nf3+-) 29...Rg2+/- 30.Kh1 Rf2 31.Be4 Rf1 32.Kg2 Ra1 33.Bb7 Ra4 (33...Kf8 34.Nc6 Ra4 35.Ba6+-) 34.Ba6 (34.Bd5 Kf8 35.Bf7 Ra5+-) 34...Ra5 (better 34...Re4!? 35.Nc6 Re3 36.Na7 Ra3+/-) 35.Nc6+- Ra3 36.Na7 Re3?? (36...Kf8+-) 37.b6 Rb3 38.b7 Rb7 39.Bb7 g6 40.Kg3 Kg7 41.Kg4 f5 42.Kf4 Kf6 43.Nc6 g5 44.Kg3 h5 45.Nd4 (45.h4 gh4 46.Kh4 Ke6+-) 45...f4 (45...Ke5 46.Nf3 Kf6 47.Bc8+-) 46.Kf3 g4 (46...Ke5 47.Nc6 Kd6 48.h4+-) 47.hg4 hg4 48.Kg4 Ke5 49.Nf3 Kd6 50.Kf4 Kc5 51.Be4 Kb5 52.Ke5 Kb4 53.Kd4 Kb3 54.Bd3 Kb4 55.Nd2 Ka4 56.Kc3 Ka5 57.Nb3 Ka4 58.Bc2 Ka3 59.Bb1 Ka4 60.Nd4 Ka5 61.Kc4 Kb6 62.Nb5 Kc6 63.Bf5 Kb6 64.Be4 Ka6 65.Kc5 Ka5 66.Bc2 Ka6 67.Nd6 Ka7 (67...Ka5 68.Nb7 Ka6 69.Kc6 Ka7 70.Kc7 Ka6 71.Bd3 Ka7 72.Nd6 Ka8 73.Bb5 Ka7 74.Nc8 Ka8 75.Bc6) 68.Kc6 (68.Kb5 Kb8 69.Kb6 Ka8 70.Bf5 Kb8 71.Nb5 Ka8 72.Nc7 Kb8 73.Na6 Ka8 74.Be4) 68...Kb8 (68...Ka6 69.Nb7 Ka7 70.Nc5 Kb8 71.Bf5 Ka7 72.Kc7 Ka8 73.Kb6 Kb8 74.Na6 Ka8 75.Be4) 69.Nb7 (69.Bd3 Ka7 70.Kc7 Ka8 71.Bb5 Ka7 72.Nc8 Ka8 73.Bc6) 69...Ka7 70.Bd3 Kb8 71.Kb6 (71.Nd6 Ka7 72.Kc7 Ka8 73.Bb5 Ka7 74.Nc8 Ka8 75.Bc6) 71...Ka8 (71...Kc8 72.Bf5 Kb8 73.Nc5 Ka8 74.Be6 Kb8 75.Na6 Ka8 76.Bd5) 72.Bf5 (72.Nd8 Kb8 73.Ba6 Ka8 74.Bb7 Kb8 75.Nc6) 72...Kb8 73.Nc5 Ka8 74.Bg4 Kb8 75.Na6 Ka8 76.Bf3 1-0. BeepBeepImAJeep (2670) - Taylanruzgar (2445), lichess.org, 2020.

5.e3 Nbd7 6.c4 Be7 7.Nf3 0-0 8.Be2 a5 9.0-0 Bb4 10.cd5 ed5 11.d4 (11.Nd4 Be6=) 11...Ne4 12.Nfd2 Ndf6 13.Ne4 Ne4 14.Bd3 Nf2?? (better 14...Re8=) 15.Rf2+- Bd3 16.Qd3 Qg5 17.Nc3 Rae8 18.Nb1?? (better 18.e4 de4 19.Ne4+-) 18...Re3= 19.Qc2 Re1 20.Rf1 Qe3 (20...Rf1!? 21.Kf1 Qf4 22.Qf2 Qh2=+) 21.Qf2+= Rf1 22.Kf1 Qd3 23.Kg1?? (better 23.Qe2 Qf5 24.Kg1+/-) 23...Re8-+ 24.Nc3 Bc3 25.Bc3 Qc3 26.Rd1 Qc4 27.Qf1 (27.h3 Qa4 28.Rc1 c6 29.bc6 bc6-+) 27...Qa4 28.h3 Re4 29.b6 (29.Kh2 h5-+) 29...cb6 30.Rc1 g6 31.Rc8 (31.Rc7 Qd4 32.Kh1 Rf4-+) 31...Kg7 32.Rc7 (32.Rc1 Qd4 33.Kh1 Qe5-+) 32...Qd4 33.Kh2 (33.Kh1 Qf6 34.Qg1 Rc4 35.Rb7 d4-+) 33...Rf4 (better 33...Qe5 34.Kg1 Qc7-+) 34.Qe2 Rf6 35.Qe7 (35.Rd7 Qf4 36.Kh1 Rd6 37.Qb2 Kg8-+) 35...Qf4 (35...Rf1 36.Rc2 Qf4 37.g3-+) 36.Kh1 d4 (better 36...Rc6 37.Rc6 bc6-+) 37.Qe1 (37.Rc8 Qd6 38.Qd6 Rd6-+) 37...d3 (better 37...Qc7 38.Qd1 Qc4-+) 38.Qg1 (38.Rd7 Rd6 39.Qc3 Kh6 40.Rd6 Qd6 41.Qd2 Kg7 42.h4-+) 38...d2 (38...Qc7 39.g4 Qc6 40.Kh2 Qc2 41.Kg3 d2 42.Qe3 d1Q 43.Kh4 Qdc1 44.Qf4 Qe1 45.Qg3 Qg3 46.Kg3 Qf2) 39.Rd7 Qf1 (better 39...Re6 40.Qd4 Qd4 41.Rd4 Re1 42.Kh2 d1Q 43.Rd1 Rd1-+) 40.Rf7 (40.Rd2 b5 41.Rd7-+) 40...Rf7 41.Kh2 Qg1 42.Kg1 d1Q 43.Kh2 Rf2 44.h4 (44.h4 Qf3 45.h5 Qg2; 44.Kg3 Qd2 45.h4 Rg2 46.Kh3 Qe2 47.h5 Qg4). BeepBeepImAJeep (2590) - ploucroux (1715), lichess.org, 2017.

5.e3 Nbd7 6.c4 Be7 7.Nf3 0-0 8.Be2 dc4 9.Bc4 c5 10.0-0 Qc7 11.Be2 Rfd8 12.d4 (12.d3 Bd6=) 12...cd4 13.Nd4 Bg6 14.Nd2 Rac8 15.Qb3 (15.Rc1 Nc5=+) 15...Nc5 16.Qa2 Nd3 (16...Nd5 17.Rfc1=+) 17.Ba3 Ba3 18.Qa3 Qc3 19.N2f3 (19.Qc3 Rc3 20.Bd3 Bd3=) 19...Qa3 20.Ra3 Nc5 (20...Nc1 21.Ra1 Ne2 22.Ne2=+) 21.Rc1 Nce4 22.Raa1 Kf8 23.Ne5 Nc3 24.Bf3 (24.Bc4 Nfd5+=) 24...Be4= 25.Kf1 Bf3 26.gf3 Ncd5 (26...Rc5 27.Nd3 Rc7 28.Nf4=) 27.a5 Ke7? (better 27...Rc1 28.Rc1 Ke8=) 28.a6+- ba6 (28...b6 29.Ndc6 Ke8 30.Nd8 Rd8 31.e4+-) 29.Nec6 (29.Ndc6 Ke8 30.Nd8 Rc1 31.Rc1 Kd8 32.ba6 Nd7 33.Nd7 Kd7+-) 29...Kd6? (better 29...Ke8 30.Nd8 Rc1 31.Rc1 Kd8 32.ba6 Nb4+-) 30.Nd8 Rd8 31.Ra6 Kd7 32.Ra7 (32.Ra7 Ke8 33.Nc6+-) 1-0. BeepBeepImAJeep (2560) - bogdanb (2485), lichess.org, 2016.

5.e3 Nbd7 6.Nf3 Bd6 7.Be2 Qe7 8.0-0 0-0 9.d4 Bg6 10.c4 c6 11.Nbd2 Rac8 12.c5 Bb8 13.a5 e5 (13...cb5 14.Bb5 a6 15.Be2=) 14.a6+= e4 15.ab7 Rc7 16.Ne5 Ne5 17.de5 Nd7 18.bc6 Rc6 Will e5 fall? (18...Ne5 19.Ba6+=) 19.Bb5+/- Rc5 20.Ba3?? (better 20.Bd7 Qd7 21.Ba3+/-) 20...Qe5-+ 21.f4 (21.g3 Rb5 22.Bf8 Nf8 23.Rb1 Rb1 24.Qb1-+) 21...ef3 22.Nf3 Qe3 23.Kh1 Rb5 24.Bf8 Nf8 25.Re1 Qb6 26.Nd4 Rb4 (26...Qd6 27.g3 Rb2 28.Re2-+) 27.Nf3 Qb7 28.Re8 f6 29.Qe2 (29.Re2 Nd7-+) 29...Be4 (better 29...Be8 30.Qe8 Rb1 31.Rb1 Qb1 32.Qe1 Qe1 33.Ne1-+) 30.Re1 (30.Rc1 Qb5 31.Qb5 Rb5-+) 30...Rb2 31.Qe3 Qc7 (better 31...Kf7!? 32.Re4 de4 33.Qc5-+) 32.Rc1?? (32.Qa3 Qf7 33.Rf8 Qf8 34.Qb2 Bf4-/+) 32...Rc2 (better 32...Qb6 33.Re4 de4 34.Qe4 Bd6-+) 33.Rc2-/+ Qc2 34.Ne1?? (better 34.Rb8 Qd1 35.Ne1-/+) 34...Qc7-+ 35.Kg1 (35.Nf3 Kf7 36.Re4 de4 37.Qe4 Qc1 38.Ng1 Bc7 39.Qd5 Ke7-+) 35...a6 (better 35...Qh2 36.Kf2 Qh4 37.Kf1 Bg3 38.Re4 de4-+) 36.Kf2 (36.Kf1-+) 36...Ba7 37.Qb6 Bb6 (37...Bb6 38.Ke2 Qc4 39.Kd1 Qa4 40.Kd2 Qa2 41.Kd1 Ba5 42.Rf8 Kf8 43.Nd3 Qd2; 37...Qb6 38.Kg3 Qf2 39.Kh3 Qf5 40.g4 Qf1 41.Kg3 Bf2 42.Kf4 g5) 0-1. BeepBeepImAJeep (2730) - erindreki (2430), lichess.org, 2015.

5.e3 Bg6 6.c4 c6 7.Nf3 Bb1 (7...Bd6!?=) 8.Rb1+= Be7 9.Be2 0-0 10.0-0 Nbd7 11.d4 Rc8 12.Qb3 Ne4 13.Rfc1 Ndf6 14.Ne5 (better 14.bc6 bc6 15.Qc2=) 14...Nd2-/+ 15.Qd1 Nb1 16.Rb1 Bd6 17.cd5 (17.bc6 bc6 18.Nf3 Rb8-/+) 17...cd5-+ 18.Bd3 Be5 (18...Ne4 19.f3 Be5 20.de5-+) 19.de5 Ne4 20.Bd4 Nc3 21.Bc3 (21.Bh7!? Kh7 22.Qd3 Ne4-/+) 21...Rc3 22.Bf1 Qc7 23.Qd4 Rc8 24.Qa7 b6 25.Qc7 R8c7 26.Ra1 Rc1 27.Rc1 Rc1 28.f4 Ra1 29.Kf2 Ra4 30.Kf3 g6 31.Bd3 Ra3 32.Be2? (better 32.Ke2-+) 32...d4 33.Ke4 (33.Bf1 d3 34.g4-+) 33…Re3 (33...Re3 34.Kd4 Re2-+) 0-1. BeepBeepImAJeep (2740) - petrik06 (2785), lichess.org, 2020.

5.e3 h6 6.c4 Be7 7.Nf3 0-0 8.Be2 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 Nbd7 12.cd5 ed5 13.0-0 Nb6 14.d4 (14.Qa7 Bc8=) 14...Nc4 (better 14...Qd6=+) 15.Nd5?? (better 15.Bc4 dc4 16.Qa7+=) 15...Nb2?? (better 15...Qd5 16.Rc1 Nb6 17.Rc7 Bd6-+) 16.Ne7+/- Qe7 17.Qb2 Re8 18.Rc1 Ne4 19.Ne5 f6 20.Bc4 Kh7 21.Nf3 g5 (21...Nd6!?+/-) 22.Bd3+- g4 (22...Kh8+-) 23.Nh4 Bg6 (23...Bc8 24.Be4 Qe4 25.d5 Qd5 26.Qf6+-) 24.Ng6 (24.b6 c6 25.Ng6 Kg6+-) 24...Kg6 25.Qc2 (25.b6!? cb6 26.f3 gf3 27.gf3 f5 28.fe4 fe4 29.Qb6 Qf6 30.Qf6 Kf6 31.Rf1 Kg5+-) 25...f5 26.Be4 fe4 (26...Qe4 27.Qe4 Re4 28.Rc7+-) 27.Qc7 Qc7 28.Rc7 Ra8 29.g3 Ra7 30.b6 Kf5 (30...Ra8+-) 31.ba7 (31.ba7 Kg6 32.a8Q h5 33.Qf8 b5 34.Qd6 Kf5 35.Rc5) 1-0. BeepBeepImAJeep (2610) - carlosh99 (2165), lichess.org, 2018.

6.c4 0-0 7.Nf3 a6 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 Nbd7 11.cd5 ed5 12.Be2 Nc5 13.0-0 Nd3 (13...Re8 14.d4 Nce4 15.Ne4 Ne4 16.Qa7=) 14.Ba3 (14.Qb1!? Nb2 15.Qf5+=) 14...Ba3 15.Qa3 Re8 (15...Be4!?=) 16.Nd4+/- Bg6 17.Na4 (better 17.f4!? Be4 18.Ra1+/-) 17...Ne5= 18.Nc5 b6 (18...Qd6 19.Ra1 Neg4 20.f4+/-) 19.Na6+= Ne4 20.Qb2 (20.Qc1 Qh4+/-) 20...Nc5 (better 20...Nc4 21.Qc1 Ncd2=) 21.Rc1?? (better 21.f4 Na6 22.ba6+/- (worse 22.fe5 Nc5=)) 21...Ned3-/+ 22.Bd3 Nd3 23.Qc3 Nc1 24.Qc1 Re7?? (better 24...Qe7 25.Qc6 Rd8=+) 25.Nc6+- Qe8 26.Ne7 Qe7 27.Qc7 (27.Nc7 Bf5+-) 27...Qc7 28.Nc7 d4 29.Nd5 Bd3 30.ed4 Bb5 31.Nb6 Kf8 32.Nd5 Bc6 33.Ne3 Ke7 34.f4 Bd7 35.Kf2 Kd6 36.Kf3 f5 37.g3 g6 38.Ke2 Bb5 39.Kd1 Bd3 40.Kc1 Kc6 41.Kb2 Be4 42.Kc3 Kb5 43.d5 Kc5 44.d4 Kd6 45.Kc4 Bf3 46.Kb5 Bd5 47.Kb4 (47.Nc4 Ke6+-) 47...Be4 48.Kc3 h6 49.Nc4 Kd5 50.Ne5 (50.h4 Bf3+-) 50...g5+/- 51.Nf7 gf4 52.gf4 (52.Nh6?! f3 53.Kd2 Kd4=) 52...h5 53.Ne5 h4 54.Nc4 h3 (better 54...Bh1!? 55.Nd2 Be4+/-) 55.Ne3+- Ke6 56.Kc4 White prepares d5 56...Bg2 (56...Kd7 57.Kc5 Ke7 58.d5+-) 57.d5 Kd6? (57...Kf6 58.Kb5 Ke7+-) 58.Kd4 Be4 59.Nc4 Kd7 60.Ke5 1-0. BeepBeepImAJeep (2710) - DeepFeller (2475), lichess.org, 2017.

6.c4 0-0 7.Nf3 c6 8.Be2 Nbd7 9.Nd4 Bb1 10.Rb1 c5 11.Nf3 dc4 12.Bc4 Nb6 13.Be2 Nbd5 14.0-0 Rc8 15.Rc1 Nd7 16.d4 Bf6 (16...Qa5 17.Qd2 Qd2 18.Nd2 cd4 19.Bd4=) 17.Qb3 cd4 18.Nd4 Nc5 19.Qa2 Qa5 20.Rc5 Rc5 21.Nb3 Nc3 22.Bc3 Qc3 23.Nc5 Qc5 24.Bf3 b6 25.Rd1 Rd8 ½-½. BeepBeepImAJeep - MichelangeIo (2845), lichess.org, 2016.

6.c4 0-0 7.Nf3 h6 8.Be2 Nbd7 9.0-0 Bh7 (9...dc4 10.Bc4 Nb6 11.Be2=) 10.d4 c6 11.Nc3 Ne4 12.Qb3 Nc3 13.Bc3 dc4 14.Bc4 Nb6 15.Be2 (15.Ba5 Be4+=) 15...Nd5 16.Bb2 c5 (16...Rc8 17.Rfc1+=) 17.dc5+= Bc5 18.Rfd1 Qe7 19.Rac1 Rac8 20.Rc4 Bd6 21.Rg4 f6 22.Bc4 Kh8 23.Nd4 (23.Bd5?! Bc2 24.Nh4 Bb3 25.Ng6 Kh7 26.Ne7 ed5 27.Nc8 Bd1=) 23...Be5 (better 23...Bg8 24.Bd5 ed5+=) 24.Ne6?? (better 24.Ba3 Bd6 25.Bd6 Qd6 26.Ne6 Qe6 27.Rgd4+/-) 24...Qe6-/+ 25.h3 Bb2 26.Bd5 (better 26.Qb2!? Rc4! 27.Rc4 Ne3 28.Qb4 Nc4 29.Qf8 Bg8 30.Rd8=+) 26...Qe5-+ 27.f4 Qc3 28.Qc3 Bc3 (28...Rc3 29.Bb7 Re3 30.Kf2-+) 29.Bb7 Rcd8 30.Rc1 (30.Rd8 Rd8 31.e4 Rd1 32.Kf2 f5 33.ef5 Bf5-+) 30...Bd2 31.Rc7 (31.Rf1 Be3 32.Kh2 Bd3-+) 31...Be3 32.Kh2 Rg8 (32...f5 33.Rgg7 Bf4 34.Kg1 Rd1 35.Kf2 Bc7 36.Rc7-+) 33.Kg3 (33.Bf3 Bf2-+) 33...Bf5 (33...f5!? 34.Rh4 Rd2 35.Kh2-+) 34.Rh4 Kh7 35.Kf3 (35.Bf3 Bb6 36.Re7 Rge8 37.Re8 Re8-+) 35...Bb6 36.Rc3 Rd3 (36...Rd4!? 37.g4 g5 38.fg5 fg5 39.Rh6 Kh6 40.gf5 Rf4 41.Kg3 Rf5 42.Be4-+) 37.Rd3 Bd3 38.g4 g5 39.fg5 (39.Rh5 Re8-+) 39...fg5 40.Rh5 Bg6 41.Be4 (41.Ke2-+) 41...Rf8 42.Bf5 Rf5 (42...Bf5!? 43.gf5 Rf5 44.Ke2-+) 43.gf5 Bh5 44.Ke4 Kg7 45.Kd5 Kf6 46.Kc6 (46.Kc4 Be2 47.Kd5 Bf1-+) 46...Kf5 (46...Bf3!? 47.Kd7-+) 47.Kb7 Bd1 (better 47...Bf3!? 48.Kb8-+) 48.a5 Ba5 49.Ka7 Be1 (better 49...h5 50.Ka6 Bd8 51.Ka7-+) 50.b6 Bf2 51.Ka6 Be2 52.Ka5 Bf3 53.h4 gh4 0-1. Timmermans,Mark (2385) - Isajevsky,A (2400), Titled Tuesday, 2021.

6.c4 0-0 7.Nf3 h6 8.Be2 Bh7 9.0-0 a6 10.d4 ab5 11.a5?? (11.cb5 Ne4=) 11...b6?? (better 11...bc4 12.Nbd2 Nc6-+) 12.cb5 ba5 13.Nc3 Nbd7 14.Ne5 Ne5 15.de5 Nd7 16.f4 Qc8 17.Na4 c6 18.b6 Rb8 19.Rc1 (19.Bc3 Nb6 20.Nb6 Rb6 21.Ba5 Rb8-/+) 19...Nb6-+ 20.Nb6 Rb6 21.Bd4 Ra6 (better 21...c5!? 22.Qa4 Qc7 23.Qa5 Rc8-+) 22.Ba6=+ Qa6 23.Qd2 (better 23.Bc5 Bc5 24.Rc5=+) 23...c5 (better 23...Qb5-/+) 24.Bc5+= Bc5 25.Rc5 The isolani on a5 becomes a target 25...a4 (better 25...Ra8!?+=) 26.Ra5 Qc6 27.Ra1 (better 27.Rc1 Qb7 28.Ra4+-) 27...Ra8?? (better 27...Bc2!?+=) 28.Ra8 (better 28.Rc1 Qe8 29.Ra8 Qa8 30.Qa5+-) 28...Qa8+/- 29.Qd1 Qb7 (29...Qa7!? 30.Kf2 Qb7 31.Ra4 Be4+/-) 30.Qa4+- Bg6 31.Qa8 Qa8 32.Ra8 Kh7 33.Kf2 Be4 34.Rd8 (34.Ra7 Bg6+-) 34...Kg6 (34...h5 35.h3+-) 35.g4 h5 36.h3 hg4 37.hg4 f6 (37...Kh7 38.Ke2+-) 38.ef6 (38.f5 Bf5 39.gf5 Kf5 40.ef6 gf6+-) 38...gf6 (38...Kf6 39.Rd6+-) 39.Kg3 (39.Rd7 Bd3+-) 39...d4 (39...Kf7+-) 40.Rd4 Bd5 41.e4 Bb3 42.f5 Kf7 43.Rd7 Ke8 44.Rh7 e5 45.Kf3 (45.Kh4 Bc2+-) 45...Kf8 (45...Bd1 46.Ke3 Bg4 47.Rh8 Ke7+-) 46.g5! Bd1 (46...fg5 47.Rc7 Combination) 47.Ke3 fg5 48.Rh1 Bg4 (48...Bb3+-) 49.Rg1 Bh5 50.Rg5 Bf7 (50...Bd1 51.Rg6 Bb3 52.Rb6+-) 51.Rg1 (51.f6!? Bb3 52.Re5 Kf7+-) 51...Ke7 52.Rb1 (52.Rg7 Kf8 53.Rf7 Kf7+-) 52...Be8 (52...Ba2 53.Rb4+-) 53.Rb6 Bd7 54.Kf3 Kf7 55.Rd6 Ke7 (55...Ba4 56.Re6 Bd1 57.Ke3 Bg4+-) 56.Rd7! Kd7 57.Kg4 Ke8 58.Kg5 Kf8 59.Kf6 (59.Kf6 Ke8 60.Ke6 Kf8 61.Ke5 Kf7 62.Kf4 Ke8 63.f6 Kd7 64.Kf5 Ke8 65.e5 Kd7 66.Kf4 Ke6 67.Ke4 Kf7 68.Kf5 Ke8 69.e6 Kd8 70.e7 Ke8 71.Kg6 Kd7 72.Kf7 Kd6 73.e8Q Kc5 74.Ke7 Kb4 75.f7 Kc5 76.f8Q Kb4 77.Qf4 Kb3 78.Qea4 Kb2 79.Qfd4 Kc1 80.Qad1) 1-0. BeepBeepImAJeep (2550) - BenKenobi04 (1820), lichess.org, 2018.

6.c4 c6 7.Nf3 h6 8.Be2 Bh7 (8...0-0 9.cd5 Nd5 10.0-0=) 9.0-0 0-0 10.d4 cb5 11.cb5 Nbd7 12.Nc3 Rc8 13.a5 (13.Rc1 Qa5=) 13...Bb4=+ 14.Qb3 Ba5 15.Ne5 (15.Rfc1 Ne4=+) 15...Ne5-/+ 16.de5 Ne4 17.Ne4 Be4 (worse 17...de4 18.Rfd1 Qc7 19.Ba3+=) 18.Bd4 Bb6 (better 18...Qg5 19.f3 Bc2-/+) 19.Rfc1?? (19.Bd3 Bd4 20.ed4 Bd3 21.Qd3 Qb6-/+) 19...Bd4 (better 19...Rc1 20.Rc1 Bd4 21.Qa3 Be5 22.Qa7-+) 20.ed4?? (20.Rc8 Qg5 (worse 20...Ba1 21.Rd8 Rd8 22.f3+=; 20...Qc8?! 21.ed4 b6 22.Ra7=+) 21.Rf8 Kf8 22.Qa3 Kg8=+) 20...Qb6 (better 20...Rc1 21.Rc1 Qg5-+) 21.Qb4 Rc7 (21...a5 22.Qa4=+) 22.Rc5 (22.Rc7!? Qc7 23.f3= (23.Ra7?? Qc1 24.Bf1 Bd3-+)) 22...Rfc8=+ 23.Rac1 Rc5 24.Rc5 Rc5 25.dc5 Qc7 26.f3 Bg6 27.f4 Be4 28.Kf2 Kf8 (28...Qe7 29.Qc3-/+) 29.g3 Ke8 (29...Qe7 30.b6 ab6 31.Qb6=+) 30.Ke3 (30.b6 ab6 31.cb6=) 30...Kd7 (30...g5!?=+) 31.Kd4 (31.b6 ab6 32.cb6 Qc1 33.Kf2 d4 34.Bb5 Bc6 35.Qd6 Ke8 36.Bc6 bc6 37.Qd4 Qc2 38.Kf3 Qh2=) 31...Qd8 (better 31...Qb8=) 32.b6+- ab6?? (32...a5 33.c6! Ke8+-) 33.cb6 Kc8 34.Qc5 Kb8 35.Bb5 (35.Qa5 f6 36.Bb5 Qb6 37.Qb6 Ka8 38.Bd7 Bc2 39.Bc8 fe5 40.Ke5 d4 41.Qb7) 35...f6 (35...Bf3 36.Bd7!! Be2 37.Qd6 Ka8 38.Be6 Qd6 39.ed6 Bb5 40.Bf7 Kb8+-) 36.Qd6 (36.Bd7 h5 37.Qd6 Ka8 38.Qa3 Kb8 39.Qa7) 36...Qd6= 37.ed6 Kc8 38.d7 Kd8 39.Bc6 Bc2 (39...bc6?? 40.b7+-) 40.Kc5 Bb3?? (40...Ke7 41.g4=) 41.Bb7 (better 41.Kd6 Bc4 42.Bb7+-) 41...Kd7= 42.Bc6 Kc8 43.Kd6 (43.g4 g5 44.f5 ef5 45.gf5 Bc2=+) 43...d4=+ 44.Be4 d3 (better 44...Kb8=) 45.Bd3+/- e5 (better 45...Kb7!?+/-) 46.Bf5 Kb7 47.Kc5 1-0. BeepBeepImAJeep (2755) - petrik06 (2780), lichess.org, 2020.

5.d4 e6 6.Nf3 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.d4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.d4 e6=+ 6.e3 Bd6 7.Bd3 Bd3 8.cd3 0-0 9.0-0 a6 10.ba6 Ra6 11.Nc3 c6 12.e4 de4 13.de4= Be7 14.Nd2 Re8 15.Kh1 e5 16.Ne2 Bf8 17.Qc2 Qa8 18.de5 Ne5 19.f4 Neg4=+ 20.Bd4 c5 21.Bg1 b5 22.Ng3 Ra3 23.Rf3 c4 24.Ra3 Qa3 25.Nb1? Qa5?? 26.Nd2 Qc7 27.e5 Bc5?? 28.ef6+/– Bg1 29.h3?? Bd4-+ 30.Rb1 Ne3 31.Qc1 Qf4 32.Ndf1 Qf2 33.Qd2 Nf1 34.Qf2 Bf2 35.Nf1 Re1 36.Re1 Be1 37.fg7 Bf2 (38.Nd2 c3-+; < 37...Kg7 38.Kg1-+) 0–1. Geisensetter,Kurt – Kahn, corr, 1985.

5.e3 e6 6.a4 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.a4).

4.a4 a6 5.Nf3 Bf3 6.ef3 ab5 7.ab5 Ra1 8.Ba1 e6 9.c4 Bd6 10.Be2 (10.cd5 ed5 (worse 10...Nd5 11.Bg7 Rg8 12.Bb2+=) 11.Qe2 Kd7=) 10...c6 11.0-0 cb5 (11...0-0 12.Re1=+) 12.cb5 (12.cd5!? 0-0 13.de6 fe6 14.Bb5+=) 12...0-0=+ 13.d4 (13.Qa4 Nbd7=+) 13...Qe7 14.Nd2 Rc8 15.Re1 Nbd7 16.g3 Nb6 17.f4 Qd7 (17...Bb4 18.Rf1-/+) 18.Nf3 h6 (18...Bb4 19.Rf1-/+) 19.Ne5=+ Qe8 20.Bd3 Nfd7 21.Qf3 Ne5 22.fe5 (22.Re5?? Be5 23.fe5 Rc1 24.Kg2 Ra1-+) 22...Bb4 23.Rd1 (23.Rb1 Qe7=) 23...Kh8 (23...Nc4 24.Bc4 Rc4 25.b6-/+) 24.Bb1 (24.Rb1!?=) 24...Nc4=+ (worse 24...Qb5 25.Qf7 Qa4 26.Rf1+/-) 25.Qd3 g6 26.Qf3 Qe7 (26...Kg8!?-/+) 27.Bd3= Kg7 28.h4 h5 29.Kg2 Nd2 30.Qe2 Nb3 31.Bb2 Na5 (31...Kg8 32.Kh2=) 32.Bc1 (32.Rc1 Rc1 33.Bc1 Qc7+=) 32...Bc3 (32...Nc4 33.Qf3=) 33.Bg5+= Qf8 34.Qe3 Kg8 35.Rc1 (35.Bf6 Nb3+/-) 35...Bb4 (35...Nb3!? 36.Bh6 Qd8=+) 36.Rb1 (36.Bh6 Qe8+/-) 36...Be7 37.Bh6 Qe8 38.Qe2 Bf8 39.Bg5 Nc4 40.Rc1 (40.g4 hg4 41.Qg4 b6+=) 40...Nb6 (better 40...Qb5!? 41.g4 hg4 42.Qg4 Ra8=+) 41.Rc8+= Qc8 42.Qd1 (42.g4 hg4 43.Qg4 Qe8+/-) 42...Qe8 43.Qb1 Be7 (43...Nc4 44.Bf6+=) 44.Bf4 (44.Be7 Qe7 45.Bg6 fg6 46.Qg6 Kf8 47.Qh5 Nc4+/-) 44...Bf8 (44...Nc4 45.Qb3 Qc8 46.Qc2+=) 45.Kf3 Be7 (45...Nc4 46.Qb3 Qc8 47.Kg2+=) 46.Be3 (46.Qc2 Qd7+=) 46...Bf8 (46...Nc4 47.Kg2=) 47.Ke2 (47.Qc2 Qe7+=) 47...Be7 (better 47...Nc4=) 48.Bg6?? (better 48.Qc2+=) 48...Bf8?? (better 48...fg6 49.Bg5 Ba3-+) 49.Bh7 (49.Bh7 Kg7 50.Bd3+-) 1-0. BeepBeepImAJeep (2735) - fin_trader (2410), lichess.org, 2020.

4.c4 e6 5.Nc3 d4-/+ 6.Na4 c5 7.h3 Bh5 8.g4 Bg6 9.Bg2 Qc7 10.e3 e5 11.Nf3 Nbd7 12.Nh4 Bd3 13.g5 Ng8 14.Qb3 e4 15.Bf1 (15.f4 Ne7-/+) 15...Bf1 16.Rf1 h6 (16...Ne5!?-/+) 17.g6=+ Ne5 (17...Qd8 18.Ng2 Qg5 19.gf7 Kf7 20.Nf4=+) 18.0-0-0 (18.f3 Ng6 19.Nf5 Qe5 20.fe4 Qe4=) 18...Nd3 (18...Qe7 19.Nf5 Qf6 20.gf7 Qf7 21.Ng3=+) 19.Kb1 Nb2 (19...Qe7 20.Nf5 Qf6 21.gf7 Qf7 22.Ng3=) 20.Nb2=+ 0-0-0 21.b6 ab6 22.Na4 Rd6 (22...Qe7!? 23.Nb6 Kb8 24.gf7 Qf7 25.ed4 cd4=) 23.gf7= Ne7 (23...Qf7 24.f3=) 24.ed4 (24.f3 g5 25.Ng2 Qc6=) 24...Rd4 25.Nb6 Kb8 26.Qb5 (26.Nd5 Nd5 27.Ng6 Rd3=) 26...g5= 27.Qa5 (27.Ng2 Nc6 28.f4 Qf7 29.fg5 Qh7+=) 27...Qc6 28.Ng2 Bg7 29.Ne3 (29.f4 ef3 30.Ne1 Rf8 31.Rf3 Rf4 32.Qc5 R8f7 33.Qc6 bc6=) 29...Rf8 30.Kc2 Rf7 31.Rb1 Kc7 (31...Rf8 32.Rb5 Rf6 33.Rfb1 Rf2 34.Qa8 Kc7 35.Ned5 Nd5 36.Nd5 Rd5 37.cd5 Rd2 38.Kd2 Qd5 39.Ke1 Bc3 40.Kf2 Qd2 41.Kg1 Qe3 42.Kg2 Qf3 43.Kh2 Be5 44.Kg1 Qg3 45.Kf1 Qh3 46.Ke1 Bc3 47.Kf2 Qf3 48.Kg1 Bd4 49.Kh2 Qh5 50.Kg3 Qh4 51.Kg2 Qg4 52.Kh2 Be5 53.Kh1 Qh3 54.Kg1 Bd4) 32.Rb5 Kd6 33.Na4 Nc8 34.Rc5 Qd7?? (better 34...Qe8+/-) 35.Nb6+- Rd2 1-0. onur604 (2320) - Gurk1964 (2340), Casual Rapid game, lichess.org, 2021.

4.h3 Bd7 5.e3 a6 =+.

5.Nf3 Bd6 6.e3 Nbd7 7.Be2 0-0 8.d4 a6 9.0-0 ab5 10.ab5 Ra1 11.Ba1 Qe7 12.Nbd2 Ra8 13.c4 c6 (13...Bb4 14.cd5 ed5 15.Qc2=+) 14.c5= Bc7 15.b6 Bb8 16.Bc3 Bf3 17.Nf3 e5 18.h3 e4 19.Nd2 h5 (19...Nf8 20.Qb3=) 20.Re1 (20.Bh5 Nh5 21.Qh5 Ra3+/-) 20...h4+= 21.Nf1 Nf8 22.Qd2 Ng6 23.Ra1 Ra1 24.Ba1 Nd7 25.Qa5 Qd8 26.Bg4 Ne7 27.Bc3 f5 28.Be2 Nf6 29.f3 (29.Kh1 Qc8+=) 29...g5 Black intends f4 (29...ef3 30.Bf3 Ng6 31.Be1+=) 30.Be1 f4 (30...ef3 31.gf3 f4 32.Bd2=) 31.Bf2 (31.fe4 Ne4 32.Bd3 fe3 33.Ne3 Bf4+=) 31...Kf7 (31...Nf5 32.Qa2+=) 32.ef4 Bf4 33.Qa7 Qd7 34.Qa8 Nf5 35.fe4 (better 35.Qa1=) 35...Ne4 (better 35...de4 36.Kh1 e3=+) 36.Bg4+- Nf2 37.Kf2 Qe6 38.Bf5 (38.Qb7!? Kg6 39.Bf5 Kf5 40.Qh7 Kf6 41.Qh6 Ke7 42.Qe6 Ke6+-) 38...Qf5+/- 39.Qb7 Kg8 40.Kg1 Bg3?? (better 40...Qd3 41.Qa8 Kf7+/-) 41.Ng3+- hg3 42.Qb8 Kg7 43.Qg3 Qb1 44.Kh2 Qf5 45.Qe5 Kg6 46.Qf5 (better 46.Qd6 Qf6 47.b7 Kg7+-) 46...Kf5 47.b7 Ke4 48.b8Q Kd4 49.Qd6 Kc4 50.Qc6 d4 51.Qe6 (51.Qd6 Kd3 52.c6 Kc3 53.c7 g4 54.c8Q Kd3 55.Qa3 Kd2 56.Qac1 Kd3 57.Q8c2) 51...Kc3 52.Qg6 d3 53.Qg5 (53.c6 d2 54.c7 g4 55.c8Q Kd4 56.Qd6 Ke3 57.Qce6 Kf2 58.Qf4) 53...d2 54.Qd2! Kd2 55.c6 Kc3 56.c7 Kd2 57.c8Q Kd3 58.Qe8 Kd2 59.g4 Kc2 60.g5 Kc1 (60...Kd2 61.g6 Kc3 62.Qe5 Kb3 63.g7 Kc4 64.g8Q Kb4 65.Qgb8 Kc4 66.Qbb5) 61.g6 (61.Qe3 Kb1 62.g6 Kc2 63.g7 Kb2 64.Qd2 Ka3 65.g8Q Ka4 66.Qc4 Ka3 67.Qdc3) 61...Kc2 (61...Kd1 62.g7 Kc2 63.Qe2 Kb3 64.g8Q Ka3 65.Qga2 Kb4 66.Qec4) 62.g7 Kc1 (62...Kd2 63.g8Q Kc3 64.Qe3 Kb4 65.Qgb3 Ka5 66.Qeb6) 63.Qe2 (63.Qe2 Kb1 64.g8Q Kc1 65.Qg1) 1-0. BeepBeepImAJeep (2515) - milacek (2710), lichess.org, 2017.

5.Nf3 Nbd7 6.e3 Bd6 7.Be2 c5 8.c4 dc4 9.Bc4 (9.Na3 Bf3 10.Bf3 Ne5 11.Be5 Be5 12.Bb7 Ba1 13.Qa1 Rb8 14.Bc6 Ke7 15.Nc4 Qd3+=) 9...0-0 10.0-0 Nd5 11.Be2 Qc7 12.h3 Bh5 13.Nc3 Nc3 14.Bc3 Nb6 Black prepares the advance c4 15.d4 Nd5 16.Bb2 c4 17.Rc1 c3 18.e4 Qe7 (18...Qa5 19.Ba1 Nf4 20.Bc3 Ne2 21.Qe2 Qa4 22.Rfd1=) 19.Ba1 Nf4 20.Bc3 Ne2 21.Qe2 Bf4 22.Rc2 Rac8 23.g4 (23.Rb1 Rfd8+/-) 23...Bg6+= 24.Ba1 (24.a5!?+=) 24...Qa3=+ 25.Rc8 (25.Kg2 Qa4 26.Ra2 Qb3=) 25...Rc8 26.Qb2?? (26.d5 ed5 (worse 26...Qa4 27.de6 fe6 28.Qd3=) 27.ed5 Qa4=+) 26...Qb2 (better 26...Qf3 27.d5 e5-+) 27.Bb2-/+ Be4 28.Ne5 Rc2 29.Ba1 (29.Ba3 Rc3 30.f3 Bd5-+) 29...f6 (29...Ra2 30.Re1 Bd5 31.Bc3-+) 30.Nd7-/+ b6 31.Re1 Bd5 32.a5 (32.Rb1 Kf7 33.a5 Bc7-+) 32...ba5 33.Nc5 Rc1 (better 33...Kf7!?-+) 34.Rc1-/+ Bc1 35.Nd3 (35.Bc3 Bc4-/+) 35...Bd2-+ 36.Kf1 (36.Nc5 Bc4-+) 36...Bb4 (36...Bc4 37.Ke2 Bh6 38.Bc3-+) 37.Ke2 Bc4 38.Ke3 Bb5 39.Nc5 Bc5 (better 39...Kf7!?-+) 40.dc5-/+ Bc6 41.Kd4 (41.f4!?-/+) 41...e5-+ 42.Ke3 Kf7 43.h4 a6 44.f4 White plans g5 44...Ke6 45.g5 ef4 46.Kf4 fg5 47.hg5 Kf7 48.Kg4 h6 (48...a4 49.Bb2-/+) 49.Kh4 (49.gh6 gh6 50.Kh5 a4-+) 49...hg5 50.Kg5 g6 51.Kf4 (51.Bc3!?-/+) 51...a4 52.Ke3 (52.Bb2 Ke6-+) 52...a3 53.Kd4 (53.Kd3 Ke6-+) 53...Ke6 54.Kc3 g5 55.Kb4 g4 56.Ka3 g3 (56...g3 57.Bd4 Kd5-+) 0-1. BeepBeepImAJeep (2620) - Amin_Cheraghi (2530), lichess.org, 2018.

5.Nf3 Be7 6.e3 c5 7.Be2 Nbd7 8.c4 0-0 9.0-0 dc4 10.Bc4 Qc7 11.Be2 b6 12.Nc3 a6 (12...Rad8 13.d3=) 13.h3 Bf3 14.Bf3 Ra7 15.d4 (better 15.ba6 Ra6 16.Qe2+=) 15...ab5?? (better 15...cd4 16.ed4 Qf4=) 16.Nb5+- (16.ab5?! Ra1 17.Ba1 cd4 18.Qd4 Ne5=) 16...Qb8 17.Na7 Qa7 18.dc5 Bc5 19.Qb3 Rb8 (19...e5 20.Rac1+-) 20.Rfd1 h6 21.Bc6 Be7 22.Rac1 Nc5 23.Qc4 (23.Qb5 Qc7+-) 23...Rc8 24.Bb5 Rd8 25.Rd8 Bd8 26.Bd4 Be7 27.Ra1 Qa5 (27...Qc7 28.a5! Nfe4 29.ab6 Qb6 30.Ra8 Kh7 31.f3+-) 28.Bc3 Qa7 29.a5 ba5 30.Ra5 Qc7 31.Bb4 (better 31.Ra8 Kh7+-) 31...Qb6? (better 31...Nd5+-) 32.Ra8 Kh7 33.Rc8 Ncd7 (33...Nfe4+-) 34.Be7 Qb7 (34...Nd5 35.Rc6 Qa5+-) 35.Rc7 (35.Rc7 Qd5 36.Qd5 Nd5 37.Rd7 Ne7 38.Re7+-) 1-0. BeepBeepImAJeep (2615) - Aegipto (2135), lichess.org, 2018.

5.Nf3 Bf3 6.ef3 Nbd7 7.Be2 Bd6 8.0-0 0-0 9.d4 a6 10.Nd2 ab5 11.ab5 Ra1 12.Qa1 Nb6 (12...Nh5 13.Re1-/+) 13.c4 dc4 14.Nc4 Nc4 15.Bc4 Nd5 16.Rc1 (16.Bd5 ed5 17.Ba3 Re8=) 16...Be7 (16...Qf6!?-/+) 17.Ba3 Ba3 18.Qa3 Qd7 19.Qc5 (19.Qa7 b6=) 19...b6=+ 20.Qa3 Rd8 21.g3 Nf6 22.Bf1 (22.Bd3 Ne8=+) 22...h6 (22...Ne8 23.Rd1-/+) 23.Qc3 Nd5 24.Qc6 Qc6 25.Rc6 Kf8 26.Bd3 (26.f4 Rd6 27.Rc4 Ke7=+) 26...Ke7 (26...Nb4!? 27.Rc3 Rd4-/+) 27.Be4 Rd7 (27...Rd6 28.Rc4=+) 28.Kf1 Nf6 (28...f5 29.Bd5 Rd5 30.Rc7 Kf6 31.f4=) 29.Ke2 Ne8 30.Ke3 Nd6 31.Bd3 Kd8 32.g4 Nc8 33.h4 Ne7 34.Rc1 Nd5 35.Kd2 (35.Ke4!?=) 35...Nf4=+ 36.Ke3 (36.Rc4 h5=+) 36...Ng2-/+ 37.Ke4 Nh4 38.Rg1 (38.Bf1 g6-/+) 38...Ng6 (better 38...Rd4! 39.Ke3 e5-+) 39.Ke3 Ne7 40.Be4 Nd5 41.Bd5 (41.Kd3!?-/+) 41...Rd5-+ 42.Rb1 Kd7 43.Ke4 f5 44.gf5 Rf5 45.f4 g5 (45...Kd6!? 46.Rg1-+) 46.fg5 hg5 (46...Rg5 47.f3-+) 47.f3-/+ Kd6 48.Rb3 Rf4 49.Ke3 e5 50.de5 Ke5 51.Rc3 Rf7 52.Rc6 Re7 53.Kf2 Kd5 54.Rg6 Re5 55.Rc6 Re7 (better 55...Kd4!? 56.Rc7 Rb5-/+) 56.Rg6= Re5 57.Rg5?? (57.Rc6 Kd4 58.Rc7 Rb5 59.Rb7-/+) 57…Rg5-+ 0-1. BeepBeepImAJeep (2560) - milacek (2685), lichess.org, 2017.

5.Nf3 Bf3 6.ef3 g6 7.c4 Bg7 8.Be2 0-0 9.0-0 dc4 10.Bc4 Nbd7 11.d4 (11.Re1 Nb6 12.Be2 Nbd5=) 11...Nb6 12.Be2 Nfd5 13.Nd2 (13.a5 Nd7=) 13...a6 (13...Nf4 14.a5 Nbd5 15.Ne4=+) 14.Ne4 (14.ba6 ba6 15.a5 Nd7=) 14...ab5=+ 15.ab5 Ra1 16.Qa1 (better 16.Ba1 Nf4 17.Re1=+) 16...Qe7?? (better 16...Nf4 17.Re1 Ne2 18.Re2 Qd5-/+) 17.Ba3+/- Nb4 (17...Qd8!? 18.Bf8 Bf8+/-) 18.Qb2+- N6d5 19.Rb1 c5 (19...Rd8 20.Bb4 Nb4 21.Qb4 Qb4 22.Rb4 Bd4+-) 20.bc6! bc6 (20...Nc6 21.Be7 Pinning (21.Be7 Deflection; 21.Qb7 Clearance); 20...bc6 21.Bb4 Combination) 21.Bb4 Nb4 22.Qb4 Qd7 23.Rd1 Rd8 24.g3 Bd4 (24...Qa7 25.Qc5 Qd7 26.Qg5+-) 25.Kg2 (better 25.Nf6! Bf6 26.Rd7 Rd7 27.Qc5+-) 25...e5?? (25...Qa7+-) 26.Nf6 (26.Nf6 Kg7 27.Nd7 Rd7 28.f4+-) 1-0. BeepBeepImAJeep (2665) - DeepFeller (2410), lichess.org, 2016.

5.a4 c5 6.e3 Nbd7 7.c4 Bd6 8.Be2 0-0 9.0-0 a5 10.d4 0.00/0 10...b6?! 0.00/0 11.Nbd2 0.00/0 11...Rc8 0.00/0 12.Rc1 0.00/0 12...Qe7 0.00/0 13.h3 0.00/0 13...Bh5 0.00/0 14.cd5?! 0.00/0 14...ed5 0.00/0 15.dc5 0.00/0 15...bc5?! 0.00/0 16.Nb3 0.00/0 16...Ra8 0.00/0 17.Qd2 0.00/0 17...Rfe8 0.00/0 18.Na5 0.00/0 18...Ne4 0.00/0 19.Qe1? 0.00/0 19...Ra5? 0.01/0 20.Qa5 0.01/0 20...d4? 0.03/0 21.ed4 0.03/0 21...Ng5?! 0.03/0 22.Rfe1 0.03/0 22...Bf3 0.03/0 23.Bf3 0.03/0 23...Nf3 0.03/0 24.gf3 0.03/0 24...Qg5 0.03/0 25.Kf1 0.03/0 25...Rf8 0.04/0 26.dc5 0.04/0 26...Nc5 0.04/0 27.Qc3? 0.02/0 27...Ne6? 0.04/0 28.Re6 0.04/0 28...fe6 0.03/0 29.Re1?! 0.03/0 29...Rf7? 0.04/0 30.Qc8? 0.03/0 30...Bf8 0.04/0 31.Qe6 0.03/0 31...Qf4 0.04/0 32.Qb3?! 0.03/0 32...Qh2? 0.05/0 33.Re8? 0.04/0 33...Qh3 0.04/0 34.Ke2 0.04/0 34...Qd7 0.04/0 35.Qe6? 0.03/0 35...Qa7?? 0.00/0 36.Rf8?! 0.13/0 36...Kf8 0.19/0 37.Ba3 0.16/0 1-0. BeepBeepImAJeep (2730) - luka1950 (2435), Rated Blitz game, lichess.org.

5.c4 c6 6.a4 (6.Ne5 dc4 7.Qa4 Qd5 8.bc6 Nc6 9.Nc6 Qc6 10.Qc6 bc6=) 6...Bd6 7.e3 0-0 8.d4 Nbd7 9.Nc3 (9.c5 Bc7=+) 9...Rc8 (9...dc4 10.Bc4 Rc8 11.0-0=+) 10.Qb3 (10.c5 Be7=) 10...Bb8 (10...Bf3 11.gf3 c5 12.cd5 cd4 13.ed4 Nd5 14.Nd5 ed5 15.Bh3-+) 11.Rc1 e5 12.cd5 cd5 13.Nd5 (13.de5 Ne5 14.Nd4 Ne4=+) 13...Rc1 14.Bc1 Bf3 15.gf3 ed4 16.Bc4 (16.Bb2 Ne5 17.Nf6 Qf6-/+) 16...de3 17.Be3 Nd5 (17...Ne5 18.Bd4-/+) 18.Bd5=+ Nf6 (18...b6 19.Qc2=+) 19.Bc4 (19.Bb7!? Bh2 20.Bc6 Qa5 21.Ke2=) 19...Qa5 20.Ke2 Be5 (20...Qc7 21.Rd1=+) 21.h4 (21.Bc5 Rd8 22.Bf7 Kh8=) 21...Qd8 22.Rd1 Qe7 23.Rh1 (23.Kf1 b6=+) 23...Bf4 24.h5 Be3 (24...Qe5 25.Rh4 Be3 26.fe3-/+) 25.fe3=+ h6 26.Rh3 Qe5 27.e4 (27.Kf2 Nh5 28.a5 Nf6-/+) 27...Qf4 (better 27...Nh5 28.Kf1 Nf4-+) 28.Kf2?? (better 28.Qe3 Qc7 29.Bb3-/+) 28...Rd8 (better 28...Ne4 29.Kg2 Qd2 30.Kg1 Qe1 31.Kg2-+) 29.Be2 (29.Bf7 Kh8 30.Qb4 Ng4 31.Kg2 Rd2 32.Qd2 Qd2 33.Kg3-+) 29...Ne4 30.Kf1 (30.Kg2 Qg5 31.Kh1 Nf2 32.Kh2 Qe5 33.f4 Qe2 34.Qf3 Ng4 35.Kg3-+) 30...Nd2 31.Kf2 Nb3 32.Rg3 Nd4 33.Rg4 Qd2 34.Re4 Ne2 35.Re2 Qd4 (35...Qg5 36.Rc2 Qh5 37.Kg2 Qg6 38.Kf2 Qc2 39.Kg3 Qg6 40.Kf2 Rd2 41.Ke3 Qd6 42.Ke4 Qd4 43.Kf5 g6) 36.Kg3 (36.Kg3 Rd5 37.Kg2 Rg5 38.Kh3 Qf4 39.Re8 Kh7 40.Rh8 Kh8 41.a5 Qg3). ClayPigeons (2150) - kaidanz (2140), Rated Bullet game, lichess.org, 2020.

5.c4 Bd6 6.e3=+.

5.e3 Bd6=+.

5.h3 Bh5 (5...Bf3 6.ef3 Bd6 7.Be2=+) 6.g4 (6.e3 Bd6=+) 6...Bg6 7.Bg2 (7.Ne5 Be4 8.Rg1 Qd6=+) 7...c6 (7...Bc5 8.Nc3=+) 8.a4 Bc5 9.0-0 h5 (9...0-0=+) 10.Ne5 (better is 10.g5!? Ne4 11.Bg7=) 10...hg4-/+ 11.Ng6 (11.hg4!? Be4 12.e3-/+) 11...fg6–+ 12.hg4?? (better is 12.Ba3 Bb6 13.a5–+) 12...Ng4 13.e3 Qd6 (better is 13...Qh4 14.Be5 Ne5–+) 14.f4 Nf6?? (14...Ne3 15.de3 Be3 16.Rf2 Qf4–+) 15.Bf6 gf6–+ 16.d4 Bb6 17.Qg4 Kf7 18.Na3 Nd7 19.c4 dc4 20.Nc4 Qe7 21.Nb6 Nb6= 22.bc6 bc6 23.Bc6 Rac8 24.d5?? ed5–+ 25.Bd5 Nd5 26.Qf3 Ne3 27.Rfe1 Rc3 28.a5?? Qc5 29.Qf2 g5 30.f5 g4 31.Rab1 g3 32.Qg3 Nf5 33.Qf2 (33...Rg3 34.Kf1 Rh1 35.Qg1 Rhg1 36.Ke2 Qc2; 33.Re3 Ng3 34.Rb7 Kg6 35.Kf2 Qe3 36.Kg2 Rc2). stoker – arfknight, Live Game Caissa's Web, 2005.

5.Nf3 =+.

5.g4 Bg6 1–0. Gross – Suess, corr 1986.

5.a4 Nbd7 6.f4 e6 7.d3 (7.g4 Bg6 8.e3 Bc5-/+) 7...Bb4-/+ 8.c3 Bc5 9.g4 Bg6 10.Nf3 (10.Bg2 Be3-/+) 10...Be3 11.Bc1 Bc1 12.Qc1 a6 13.ba6 Ra6 14.Qe3 (14.g5 Nh5+=) 14...0-0 (14...Nb6 15.f5 d4 16.Nd4+/–) 15.Nh4 (15.g5 Nh5+=) 15...b5 (15...c5 16.Ng6 fg6 17.Bg2+=) 16.Ng6 (16.g5 Nh5 17.a5 c5+=) 16...hg6 (16...fg6 17.g5 Nh5 18.Na3 ba4 19.Bg2 Nf4 20.Qg3-+) 17.g5= Nh5 18.Qc1? (18.a5!?=) 18...Qa8 (18...Ng3 19.Rg1 Nf1 20.Rf1 ba4 21.Na3-/+) 19.Bg2-/+ Ra4 (19...Ng3!? 20.Rh2 Ra4 21.Ra4 ba4-/+) 20.Ra4+= Qa4 21.0-0 (21.e3 Ng3 22.Rg1 Nf5-/+) 21...Ng3 22.Re1 Qa2 (22...Qa7 23.e3-/+) 23.Kf2 (23.Qe3 Nf5 24.Qf3 Qa7 25.Qf2 Ne3-/+) 23...Nh5 (23...Nf5 24.Qd2 Qa7 25.e3-/+) 24.Rd1 (24.Qe3 Ra8-/+) 24...f6 (24...Ra8 25.Ke1-/+) 25.Bf3 (25.Ke1 e5 26.Qa3 Qa3 27.Bd5 Kh7 28.Na3 Nf4=) 25...fg5 26.fg5 Nf4 27.Rd2 (27.Qe3!?-/+) 27...Qa7-+ (27...Nh3 28.Kg3 Rf3 29.ef3+-) 28.Kg3 Qe3 29.Qe1?? (29.Qc2 Qg1 30.Kh4 Qf2 31.Kg4 Ne5) 29...Nh3! 30.Kh3 Deflection from f3 30...Rf3! Eliminates the defender f3 31.Kg2 (31.ef3 A pinning theme 31...Qe1) 31...Rf5 32.Qg3 Rg5 (32...Rg5 33.Qg5 Qg5 34.Kh3 e5-+) 0–1. Cane,Luisito – Kern,Manfred, corr 3GMM–57, 1996.

5.d3 e6 6.Nc3 Bb4-/+ 7.a3 Ba5 8.d4 c5! 9.Qd3 Bg6 10.Qd2?? Ne4 11.Qe3 cd4 12.Qd4 Qb6 13.Qb6 ab6 (13...Bb6?! 14.Ne4 Be4 15.f3=). amikhlin (2385) – chadpalmer (2345), net–chess.com, 2004.

5.Nf3 Bf3 6.ef3 e6 =.

5.g4 Bg6=+ 6.Nf3 a6 7.a4 e6 8.Bg2 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.0-0 h5 12.g5= Ne4 13.h4 Qa8 14.Nc3 Qa5 15.Bb2 Bc5 16.Qa1= 0-0?? 17.Qa5+- (17...Bb6 18.Qa1+-) 1–0. Mehlhorn,Uwe – Zattera, ECC5.038, 2003.

5.g4 Bg6 6.Nf3 e6 7.Bg2 Be4 (7...a6 8.Nc3=+) 8.d3 (8.Nc3 Bf3 9.Bf3 Bb4=) 8...Bf3=+ 9.Bf3 Qd7 (9...a6!?=+) 10.c4+= Bb4 11.Nd2 d4?? (Better is 11...0-0+=) 12.Bb7+- a6 13.Ba8 ab5 14.a3 Bc5 15.g5 Nh5 16.cb5 Qb5 17.Qb3 Qb3 18.Nb3 Be7 19.Rc1 Bd6 20.Bd4 0-0 21.a4 Bb4 22.Bc3 Ba3 23.Ra1 1–0. Taulien,Hans_Juergen – Steingraeber,Barbara, remoteschach.de, 2002.

8.c4 e5+= 9.Be2 (9.cd5 Nd5 (9...cd5 10.g4 Bg6 11.Nc3 Qd6 12.Nh4 Ne4=) 10.g4 Bg6 11.Nc3 Nb4 12.Rc1 e4-/+; 9.Nc3 e4 10.g4 Ng4 11.hg4 Bg4 12.Be2 ef3-+; 9.g4 Bg6 10.Nc3 dc4 11.g5 Ne4 12.Bc4 Rd8+=) 9...dc4 (9...e4 10.bc6 bc6 11.Ng1 Be2 12.Ne2 dc4-/+) 10.Na3 (10.Bc4 e4 11.g4 ef3 12.bc6 bc6 13.gh5 Ne5+=; 10.g4 Bg6 11.Bc4 Bd6 12.bc6 Qc6+=) 10...Be7 (10...e4!? 11.bc6 bc6-/+ (worse is 11...ef3 12.cd7 Nd7 13.Nb5+=; worse is 11...Qc6 12.Nd4 Be2 13.Qe2-/+; 11...Nc5 12.Nb5 Qe7-/+) 12.Nd4 Be2-/+; 10...Bf3 11.gf3 Ba3 12.Ra3 cb5-/+) 11.Nc4 (11.bc6 bc6 12.Nc4 e4+=) 11...e4 12.Ng5? (better is 12.bc6!? bc6+= (12...Qc6 13.Nd4 Be2 14.Qe2=)) 12...Be2-/+ 13.Qe2 h6 14.Nf7 (14.Ne4!? Ne4 15.Bg7-+) 14...Kf7 15.0-0 Rhe8 16.f3 Kg8 17.f4 (17.fe4 Ne4 18.d3 Nef6-+) 17...Rac8 18.Ne5 Bd6 19.Qc4 Kh8 20.Qf7?! (20.d4-+) 20…Ne5 (20...Ne5 21.Qc7 Rc7 22.Be5 Be5 23.fe5 Re5-+) 0–1. Gross,Wilhelm – Merten,Rainer, xvii/07, corr Germany, 1988.

8.bc6 bc6 A) 9.Nc3 Rb8 (9...e5+= 10.g4 Bg6 11.Nh4 Bb4 12.Ng6 hg6+= 13.Na2+=) 10.Rb1 A1) 10...Bf3 11.Qf3 e5 (11...Nc5 12.Bd3 Nd3 13.cd3+=) 12.Be2 Ne4 (12...Rb4+= 13.Ba1+=) 13.Ne4+=; A2) 10...e5 11.g4 Bg6 12.Bg2 Bb4 13.Nh4-/+; B) 9.g4 Bg6 10.g5 (10.Ra2 e5 11.g5 Ne4 12.d3 Qa5 13.Nbd2-/+) 10...Rb8 11.Ra2 Ne4 12.d3 Qa5 13.c3+=; C) 9.d4 Rb8 (9...Bf3 10.Qf3 Rb8 11.Ra2 e5 12.de5 Ne4 13.Bd3+=) 10.Ra2 (10.Ba3 Bf3 11.gf3 e5 12.Bf8 Nf8 13.de5-/+) 10...e6 11.Bd3 c5 12.dc5 Bc5 13.0-0+=; D) 9.Be2 Rb8 (9...Bf3 10.Bf3 Rb8 11.Bf6 Nf6 12.c4 e5 13.cd5+=) 10.Bf6 (10.Ra2 e5 11.g4 Bg6 12.Nh4 Bb4 13.Ng6-/+) 10...Nf6 11.c4 e5 12.cd5 e4 13.Nd4+=; E) 9.Bf6 Nf6 10.d4 e6 11.Bd3 Bb4 (11...Rb8 12.0-0 Bd6 13.c4+=) 12.c3 Bd6+= 13.Nbd2+=.

8.g4 Bg6 9.Nc3 A) 9...e5 10.Nh4 (10.bc6 bc6 11.Nh4 Rb8 12.Rb1 Bb4 13.Na2+=) 10...Bb4 11.Ng6 hg6 12.h4 (12.Rb1 g5 13.Na2+=) 12...Nc5+= 13.f3+=; B) 9...Rd8 10.Nh4 e5 11.Ng6 hg6 12.bc6 bc6+= 13.Rb1+=; C) 9...Rc8 C1) 10.Rb1 C11) 10...Ne4 11.bc6 bc6 12.d3 Nec5 (12...Nc3= 13.Bc3=) 13.h4=; C12) 10...e5 11.bc6 bc6 12.Nh4 Rb8 13.Ng6+=; C2) 10.Nh4 Be4 11.Ne4 Ne4 12.Nf5 e5 13.bc6+=; D) 9...e6 10.Rb1 (10.a5 cb5 11.g5 Ne4 12.Nb5 Qd8 13.a6=; 10.Nh4 Be4 11.Ne4 Ne4 12.Nf3 e5 13.c4=; 10.bc6 bc6 11.Rb1 Rb8 12.Bg2 Ne4 13.Nh4+=; 10.Ra2 Ne4 11.a5 e5 12.a6 Rb8 13.Nh4+=) 10...Rb8 11.Nh4 Be4 12.Nf3 h6= 13.Ne4=; E) 9...Ne4 10.Ne4 (10.Rb1 e5 11.bc6 bc6 12.d3 Nc3 13.Bc3+=) 10...Be4 11.d3 Qa5 12.c3 Bf3+= 13.Qf3+=.

8.g4 Bg6 9.d3 A) 9...e5 10.g5 (10.bc6 bc6 11.g5 Ng8 12.Nbd2 h6 13.gh6+=) 10...Ng8 11.Nh4 Be7 12.Rg1 a6 13.Nd2=; B) 9...h6 10.Bg2 (10.Nbd2 e5 11.c4 dc4 12.bc6 bc6 13.Nc4+=; 10.Nh4 Bh7 11.Bg2 e5 12.0-0 Bd6 13.Nf5+=; 10.bc6 bc6 11.Nc3 e5 12.Ba3 Ba3 13.Ra3-/+; 10.c4 dc4 11.dc4 e5 12.Nbd2 Bb4 13.Bg2-/+) 10...e5 11.0-0 Rd8 12.Nh4 Bh7 13.f4+=.

8.g4 Bg6 9.g5 A) 9...Nh5 10.Be2 (10.Nh4 e6 11.Ng6 hg6 12.a5 Be7 13.Rg1=; 10.bc6 bc6 11.Be2 Rb8 12.Bc3 h6 13.h4=; 10.Rg1 cb5 11.Nc3 b4 12.Nb5 Qb8 13.Nh4+=) 10...h6 11.bc6 bc6 12.h4 Rb8= 13.Bc3=; B) 9...Ne4 10.d3 (10.bc6 bc6 11.d3 Rb8 12.Ra2 Qa5 13.c3+=) 10...Qa5 11.c3 Nec5 12.d4 Ne4+= 13.Nbd2+=.

4.a4 Bg7 (---> 1.b4 Nf6 2.Bb2 g6 3.b5 Bg7 4.a4 d5).

4.e3 a6 5.Bf6 ef6 6.Nf3 =.

4.e3 c5 5.Nf3 (5.Bf6 ef6 6.Be2 Bd6=) 5...Bg7 6.c4 dc4 (6...0-0 7.cd5 Qd5 8.Nc3=) 7.Bc4 0-0 8.d4 Ne4 9.0-0 Bg4 10.h3 Bf3 11.Qf3+= Nd6 12.Bd5 Nd7 13.a4 Rb8 14.Nd2 cd4 15.ed4 Nb6 16.Rfd1 Nd5 17.Qd5 Nf5 18.Qd8 Rfd8=+ 19.Nf3 Rbc8 20.g4 Nd6 21.Ne5 Nc4=+ 22.Nc4 Rc4 23.Rdc1 Rdc8 24.Rc4 Rc4 25.a5 Rb4-/+ 26.Ba3 Rb5 27.Be7 f5 28.Ra4= Kf7 29.Bc5+= a6 30.gf5 gf5 31.Kg2 Ke6 32.Bb6 Kd5 33.Kg3 Bh6 34.Ra2 Rb3 35.Kg2 Bg7=+ 36.Rc2 Bd4 37.Rd2 Rb4 38.Kf3 Ke5 39.Bd4 Rd4 40.Rd4 Kd4 41.Kf4 Kc5 42.Kf5 b5 43.ab6 Kb6 44.Ke6 a5= 45.f4 a4 46.f5 a3 47.f6 a2 48.f7 a1Q 49.f8Q Qe1 50.Kf6 Qc3=+ 51.Kg5 Qg3 52.Kf6 Qh3 53.Qd6 Kb5 54.Qd5 Kb4 55.Qd4 ½–½. Kaszynski,B – Skaruz,J, Ustrzyki Dolne op, 1996.

4.Nf3 Bg7 5.e3 0-0 (---> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0-0 5.Nf3 d5).

5.e3 e6 6.c4 Bg7 7.Nf3 0-0 8.Be2 b6 9.0-0 a5 10.d4 Bb7 11.Nbd2 (11.dc5 bc5 12.Nc3 Nbd7+=) 11...Nbd7= 12.cd5 ed5 (12...Bd5 13.Qb1=) 13.Rc1 c4 14.Ba3 Re8 15.Nb1 Ne4 16.Nc3 Nc3 17.Rc3 Nf6 18.Ne5 Ne4 19.Rc1 Be5 20.de5 Re5 21.Qd4 Re8 (21...Re6 22.f3 Nd6 23.e4=+) 22.Rfd1 (22.Bb2 f6=) 22...Qf6 23.Bf3 (23.Qf6 Nf6 24.Bb2 Ne4-/+) 23...Qd4-/+ 24.Rd4 (24.ed4? Ng5-+) 24...Rac8 25.Bb2 (25.Be4 Re4 (worse 25...de4 26.Bb2+=) 26.Re4 de4=+) 25...Nc5-/+ 26.Bd5 Bd5 27.Rd5 Na4 28.Bd4 c3 29.Rd6 c2 (29...Re6 30.Re6 fe6 31.Kf1-/+) 30.Rc6 (better 30.Kf1!?=+) 30...Rc6-/+ 31.bc6 Rc8 32.Rc2 b5?? (better 32...Nc5-/+) 33.c7+/- b4? (better 33...f5 34.Be5 Kf7+=) 34.Be5?? (34.Bf6 Nb6 35.Rd2 h6 36.Rd8 Kh7+-) 34...b3?? (34...f6 35.Bf6 b3 36.Rc1=+) 35.Rc1?? (better 35.Rd2 Rf8 36.Rd3+-) 35...Nb6 36.Rc6 Nd5 37.Bb2 Nb4?? (37...f6 38.Rc5 Nc7 39.Kf1=+) 38.Rc3 (better 38.Rd6 Nc6 39.Rc6+-) 38...a4+/- 39.Rc4 Nd3?? (better 39...a3 40.Ba3 Nd5+/-) 40.Bd4 (better 40.Rd4 Kf8 41.Rd8 (41.Rd3?! Rc7 42.Kf1 Ke7+/-) 41...Ke7 42.Rc8+- (42.Rd3?! Rc7 43.Rd4 Ra7 44.Ba3 Ke6+/-)) 40...a3-+ 41.Rb4 (41.Rc6 b2 42.Rb6-+) 41...Rc7 (better 41...Nb4 42.g4 b2-+) 42.Rb8 (42.Rb8 Rc8 43.Rc8) 1-0. BeepBeepImAJeep (2505) - rushonfury (2410), lichess.org, 2018.

5.e3 Bg7 6.c4 (6.Be2 0-0=) 6...e6 (6...0-0 7.cd5 Qd5 8.d4=+) 7.Nf3= 0-0 8.Be2 b6 9.0-0 Bb7 10.d4 Nbd7 11.Nbd2 Nb8 (11...a6 12.Qb1=) 12.cd5 ed5 13.Rc1 Ne4 (13...c4 14.Ne5 a6 15.ba6 Ba6 16.Re1+=) 14.Ne4 de4 15.Ne5 Nd7 16.Nc6 Qc7 17.Ba3 Rfe8 (17...Bc6 18.dc5 bc5 19.bc6+/-) 18.d5 (18.dc5!? bc5 19.Bc5 Nc5 20.Rc5+/-) 18...Ne5 19.Bc4 (19.a5 Qd6+=) 19...Qd6 20.Ne5 (20.Bb2 Nd3 21.Bg7 Nc1+=) 20...Be5=+ 21.g3 Rad8 22.Qg4 (22.Qc2!?=+) 22...Bd5-/+ 23.Rfd1 Qe6 24.Qe6 Be6 25.Bf1 (25.Rd8!? Rd8 26.Be6 fe6-/+) 25...Rd1 26.Rd1 Kf8 27.a5 Ke7 28.ab6 (better 28.Bg2 f5 29.f3-+) 28...ab6 29.Bg2 Ra8 30.Bc1 (30.Bc5 bc5 31.Be4 Rb8-+) 30...f5 31.Bd2 (31.f3 Ra1 32.Re1-+) 31...Rd8 32.f4 (32.f3 ef3 33.Bf3 Bb3-+) 32...Bc3!! 33.Bf1 (33.Bc3 Rd3 Double attack (33...Rd1 Pinning; 33...Rd1 Deflection; 33...Rd3 Decoy)) 33...Rd2 (33...Bd2 34.Kf2 c4 35.Ra1-+) 34.Rc1 Bb4 (34...Bb2 35.Re1-+) 35.Ra1 (35.Rb1 Ra2-+) 35...c4 36.Ra7 (36.g4 Bc5 37.gf5 gf5 38.Ra7 Kd6-+) 36...Bd7 (36...Kd6 37.Bc4 Bc4 38.Ra4-+) 37.Rc7 (37.Bc4 Bc5 38.h3-+) 37...c3 38.Bc4 c2 39.Bb3 Rd1 40.Kf2 c1Q 41.Rc1 Rc1 42.Bd5 Rc3 43.g4 Bc5 44.gf5 Re3 45.Kg2 gf5 (45...Bf5 46.Be4 Be4 47.Kf1 Rf3 48.Ke2 Rf2 49.Ke1 Bd3 50.f5 Be3 51.f6 Kf6 52.h3 Rf1) 46.Bc6 Rf3 47.Be4 fe4 (47...fe4 48.f5 Bf5 49.h4 Bh3 50.Kh1 Bd6 51.Kg1 Rf1) 0-1. BeepBeepImAJeep (2740) - chessconqueso (2575), lichess.org, 2019.

(---> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 d5).

5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0-0 5.Nf3 d5).

4.d4 ed4 5.Qd4 Nc6 6.Qh4 Nb4 7.0-0-0 -+.

5.Na4 b5 -/+.

5.Na4 Bd7 6.Nc5 Bc5 7.bc5 Qe7 8.e3 Qc5 9.ed4 ed4 10.Bd4?? (better is 10.Nf3 Nc6 11.Qe2 Kd8 12.Qc4 Re8 13.Kd1 Qc4 14.Bc4-/+) 10...Qd4–+ 11.Ne2 Qd5 12.c4 Qc5 13.Qb3 b6 14.Qg3 0-0 15.Qe3 Nc6 (better is 15...Qc4 16.Rc1 Qa4 17.Qd4 Qd4 18.Nd4 Re8 19.Ne2–+) 16.Qc5 bc5 17.d3 Ne5 18.Ng3 Rfe8 19.0-0-0 Neg4 20.Rd2 Re1 21.Kc2 (21.Kb2 Rb8 22.Ka2 Ba4–+) 21...Ba4 22.Kc3 Rb1 23.h3 Rb3 24.Kc2 Ne5 25.Kc1 Ra3 26.Rh2 (26.Kb2 Rb3 27.Ka1–+) 26...Rb8 27.Rc2 Bc2 28.Kc2 Ra2 29.Kc1 Rf2 30.Be2 Nc4! 31.dc4 Rb3 32.Nh5 Re2 33.Nf6 gf6 34.h4 Rbb2 35.h5 Rg2 36.Rg2 Rg2 37.Kd1 Rg4 38.Kd2 Rc4 39.h6 Rh4 40.Kc3 Kf8 41.Kb3 Ke7 42.Kc3 Kd6 43.Kd3 Kd5 44.Kd2 Rh6 45.Kc1 Rh2 46.Kb1 c4 47.Kc1 c3 48.Kb1 c5 49.Kc1 f5 50.Kb1 f4 51.Kc1 f3 52.Kd1 f2 53.Kc2 (53.Ke2 c2 54.Ke3 c1Q 55.Kf3 f1Q 56.Kg4 Qff4) 53...Kc4 54.Kc1 (54.Kd1 f1Q) 54...f1Q 0–1. BigLion_02 – Tgiant, computer chess game, 2002.

5.de5 d4 6.ef6 Qf6 7.Nf3 dc3 8.Bc1 -/+.

5.Nf3? Nc6 (6.Ne5 Ne4-/+; better is 5...Ne4!? 6.Qd3 c5-+) 0–1. cole baker – Fabbri (1695), internet, 2005. >

4.e3 c5 5.bc5 Nc6 6.Nf3 e5 7.ed4 ed4 8.d3 Bc5 9.Be2 0-0 10.0-0 Bf5 11.Nbd2 h6 12.Nb3 b6 13.Nh4 Bh7 14.Bf3 Rc8 15.g3 Ne5 16.Be2 Nc6 17.Ng2 Re8 18.Re1 Bb4 19.Nd2 Qe7 20.Bf3 Qd6 21.Nf4 Re1 22.Qe1 Re8 23.Qd1 Ne5 24.Ne4 Ne4 25.Be4 Be4 26.de4 Bc5 27.Nd5 Nc4 28.Bc1 Re4 29.Nf4 Qe5 30.Nd3 Qf5 31.Qc2 Ne5 32.Ne5 Re1 33.Kg2 Qc2 0-1. banjoband (2165) - sticksator (2180), Rated Blitz game, lichess.org.

4.e3 d3 5.Qb3 e6 (5...a5 6.ba5 Na6 7.Nf3=) 6.Bd3 (6.Nf3 a5 7.b5 Nbd7 8.Qd3 Bd6+=) 6...Bd6 (6...Bb4!? 7.Qb4 Qd3 8.Bf6 gf6=) 7.Nf3 0-0 8.c5 Be7 9.Bc2 Bd7 10.Qc3 b6 11.g4 (11.Be4 Bc6 12.Bc6 Nc6+/–) 11...bc5 (better is 11...Bc6!? 12.e4 a5=) 12.bc5+/– Bc6 13.Ke2 (better is 13.e4!?+=) 13...Nbd7 14.h4 (14.g5!? Ne8 15.d4=+) 14...e5-/+ (< 14...Bc5 15.g5 Bb5 16.Kd1=+) 15.h5 (15.g5 Nd5 16.Qa5 Rb8-+ (16...Bc5?! 17.Ne5 Qb8 18.Nd7 Qb2 19.Qc5 Bd7 20.Na3=)) 15...Ng4 (15...Rb8 16.Bf5 Nc5 17.Qe5 Bb5 18.Kd1-+) 16.Na3 (16.Rg1 f5-/+) 16...Bf6 (16...Bc5 17.Rag1 f5 18.d4 Bf3 19.Kf3 e4 20.Ke2-/+) 17.Qc4 (better is 17.e4-/+) 17...Qe7?? (17...Rb8 18.Qg4 Rb2 19.Qf5 Rc2 20.Nc2 Nc5 21.Nb4-+) 18.Rag1?? (18.Qg4 Nc5 19.h6 g6+/–) 18...Nc5?? (better is 18...Nh6-+) 19.Qg4+/– h6? (19...Rab8 20.Bc3+/–) 20.d4 (better is 20.Qf5 Bf3 21.Kf1+- (21.Kf3?! e4 22.Be4 Ne4 23.Qe4 Qe4 24.Ke4 Bb2+/–)) 20...ed4?? (better is 20...Rfb8!? 21.Nc4 Rb2 22.Nb2 ed4+-) 21.Bd4 (better is 21.Nd4 Be4 22.Nf5+-) 21...Bf3 22.Kf3 Bd4 23.Qd4 (< 23.ed4 Ne6 24.Nb5 Qf6 25.Qf5 Qf5 26.Bf5 Rab8+/–) 23...Ne6 24.Qg4?? (better is 24.Qd3 f5 25.Rg6+-) 24...Ng5=+ 25.Ke2 Qa3 26.Qf5 Qa6 (26...Qa2 27.Rg5 Qc2 28.Qc2 hg5 29.h6+-) 27.Ke1 Qe6?? (27...Rfb8 28.Rg5 hg5 29.Qh7 Kf8 30.Qh8 Ke7 31.Qg7=+) 28.Qe6?? (better is 28.Rg5 Qf5 29.Rf5+-) 28...fe6 29.Ke2 Rf6 (29...Rab8!? 30.f4 Rb2 31.fg5 Rc2 32.Kd3 Ra2 33.gh6 Rd8 34.Kc3 Ra3 35.Kc4 Re3 36.Rg7 Kh8 37.Rc7 Re4 38.Kc3 a5=) 30.f4+= Nf7 31.Rg6 (31.Rh2 Kh8+=) 31...Nd6 (31...e5 32.Rhg1 Rg6 33.hg6=) 32.Rhg1 (better is 32.Rc1 Rc8 33.Ba4+=) 32...Kf7?? (better is 32...Rg6 33.Rg6 Kf7=) 33.Rg7+- Ke8 34.Rg8 (34...Rf8 35.R1g7+-; better is 34.Ba4 Kd8 35.Rg8 Ke7 36.Ra8 Rf5 37.Rg7 Rf7 38.Rf7 Nf7 39.Re8 Kd6+-) 1–0. fresca100 – febble, Live Game Caissa's Web, 2004.

4.e3 de3 5.fe3 e5 6.a3 =+.

4.Nf3 c5 5.bc5+= Nc6 6.e3 e5 7.Ne5 (better is 7.ed4!? Nd4 8.Nd4 ed4 9.Qe2 Be6 10.Qe5+=) 7...Ne5-/+ 8.ed4 Ng6 9.g3 (9.Qe2!? Qe7 10.Nc3-/+) 9...Be7 10.Bg2 0-0 11.0-0 Rb8 (11...Bg4 12.Qb3=+) 12.Qa4 a6 13.Qb3 (13.Re1 b6 14.c6 b5 15.cb5 Rb5-/+) 13...Qc7 (13...b6 14.Re1-/+) 14.Nc3 (14.Qb6 Qb6 15.cb6 Re8-/+) 14...b6 15.c6 Bf5 16.Rfe1 Bd6 17.a4 (17.Qa4 Ra8-/+) 17...Rfe8 18.Re3 Ne7 (18...Ng4 19.Nd5 Re3 20.de3=) 19.d5 Bc5 20.Re2 Bg4 21.Ree1 0–1. Nowakowski – Laskowski, corr 1. AMM Poland, 1991.

4.Nf3 Nc6 5.b5 Nb8 6.Bd4 +=.

4.h3 e5=+ 5.c5 (5.Nf3 Qe7 6.a3 c5=+) 5...b6 (5...a5 6.a3 ab4 7.ab4 Ra1 8.Ba1-/+) 6.e3 (6.Nf3 bc5 7.Ne5 cb4=+) 6...bc5-/+ 7.b5 a6 8.g4 (8.Bc4 ab5 9.Bb5 c6-/+) 8...h6 (8...Qd5 9.f3-+) 9.Nf3 (9.Bg2 e4 10.ed4 ab5-/+) 9...Qd5 10.Bg2 Qd7?? (better 10...ab5 11.ed4 e4 (11...ed4?! 12.0-0 Ra5 13.Nd4=) 12.dc5 ef3 13.Bf3 Qe6 14.Qe2 Qe2 (14...Bc5 15.Ba8 Kd8 16.Qe6 Be6 17.a4+-) 15.Be2 c6 16.Bf6 gf6-+) 11.Ne5+- Qb5 12.Ba8 (12.Na3!? Qb2 13.Nac4 Qa1 14.Qa1+-) 12...Qb2 13.Bd5?? (better 13.Qb3 Qb3 14.ab3+-) 13...Nd5-+ (13...Qa1?! 14.Bf7 Kd8 15.Ng6+=) 14.Qf3 (14.Qb3 Qa1 15.0-0 Nd7-+) 14...f6 (better 14...Be6!? 15.0-0 Qa1 16.Nc3 Qf1 17.Kf1 dc3 18.dc3-+) 15.Qd5 (15.Ng6 Bb7 16.e4 Qa1 17.0-0-+) 15...Be6 (better 15...fe5 16.0-0 Bd6-+) 16.Qe6+- Be7 17.Qd7 (better 17.Ng6 Kd8 18.Qe7 Kc8 19.0-0 Qa1 20.Qe6 Kb7 21.Qb3 Kc8 22.Nh8+-) 17…Nd7-+ (17...Nd7 18.Ng6 Ne5 19.Ne5 Qa1-+) 0–1. zomboeb – Suraj51, lichess.org, 2019.

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.c4).

4.a3 c5 5.b5 dc4 6.e3 a6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.c4 dc4).

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 d5 4.c4).

4.c5 a5 5.a3 Be7 6.Nf3 d4 (6...ab4 7.ab4 Ra1 8.Ba1+=) 7.Nd4 e5 (7...0-0 8.d3=) 8.Nf3 e4 9.Ng5 (9.Ne5 0-0=) 9...0-0 (9...h6!? 10.Nh3 Nc6-/+) 10.Qc2 Nc6 11.b5 Nd4 (11...Qd5 12.bc6 Qg5 13.cb7 Bb7 14.c6-/+) 12.Bd4 (12.Qa4 Ne6 A) worse is 13.Ne4 Ne4 (13...Nc5?! 14.Nc5 Bc5 15.d4=) 14.Qe4 Nc5-/+; B) 13.Ne6 fe6 14.Nc3 Bc5 15.e3=) 12...Qd4-/+ 13.Nc3 e3 (13...Bc5?! 14.e3 Qe5 15.Nge4 Ne4 16.Qe4+=) 14.de3 Qc5 15.g3?? (better is 15.Nf3 Bf5 16.Qb2-/+) 15...Qg5-+ 16.Bg2 Qe5 17.0-0 Rd8 18.Rfb1 (18.Rad1 Bf5 19.Qc1 Rab8-+) 18...Bf5 19.e4 Bg6 20.f4 (20.e3 Rd7 21.Rc1 Rad8-+) 20...Qc5 21.Kh1 Nd5! 22.Nd5 Qc2 23.Ne7 Kf8 24.Ng6 hg6 25.Bf3 Rd2 26.Re1 Qb3 27.Kg2 Qb5 28.a4 Qc4 29.h4 Rad8 30.Rec1 Re2 31.Be2 Qe2 32.Kh3 Rd2 33.Rc7 f5 (33...f5 34.ef5 gf5 35.Rc8 Kf7 36.Rc7 Kf6 37.Rf7 Kf7 38.Rc1 Qg4) 0–1. Baer,Cy (1895) – Nogler,Schimun (2400), RSS5E–11 remoteschach.de, 2007.

5.cd5 ed5 6.a3 (6.Qa4 Nc6-/+) 6...Ba5 (6...Bd6 7.Nf3-/+) 7.h3 (7.Nf3 0-0-/+) 7...c5 (7...0-0 8.Nf3-/+) 8.Bb5 (8.Qf3 Nbd7-/+) 8...Nc6 (8...Bd7 9.Bd7 Nbd7 10.Nf3-/+) 9.Nf3 (9.Qf3 Rg8-/+) 9...0-0 10.0-0 (10.Bc6 bc6 11.Qa4 Bd7-/+) 10...Bb6 (10...Qb6 11.Qa4 a6 12.Bc6 Qb2 13.Qa5 Qa1 14.Nc3-/+) 11.d4 (11.Bc6 bc6 12.Qa4 Qd6-/+) 11...c4 12.Nc3 a6 13.Bc6 bc6 14.Re1 c5 15.Na4 Ba5 16.Bc3 cd4 17.ed4 Ne4 18.Ba5 Qa5 19.Ne5 Re8 20.f3 Ng3 21.Kh2 Nf5=+ 22.Nc6?? Re1 23.Na5 Rd1 24.Rd1 Be6 25.Nc5 Ne3 26.Re1 Nc2-+ 27.Rc1 Nd4 28.Nc6 Nc6 (29.f4 Nd4-+) 0–1. gtate (1900) – nhathuy (2160), net–chess.com, 2006.

5.cd5 ed5 6.Qb3 Nc6 (6...Bd6 7.Nf3-/+) 7.a3 (7.Bb5 Bd6-/+) 7...Bd6 8.Bb5 (8.Nf3 0-0-/+) 8...Be6 (8...0-0 9.Nf3-/+) 9.Nf3 d4 (9...a6 10.Bc6 bc6 11.Qb7-/+) 10.Qd3 (10.Bc6 bc6 11.Qa4 de3 12.fe3 0-0=+) 10...de3-/+ 11.de3 0-0 12.0-0?? (better 12.Nbd2=+) 12...a6-+ 13.Ba4 (13.Bf6 gf6 14.Nc3 ab5 15.Qb5-+) 13...Bh2! 14.Kh2 (14.Nh2 Qd3 Discovered attack; 14.Kh2 Ng4 Double attack (14...Qd3 Discovered attack; 14...Qd6 Decoy)) 14...Qd3 15.Bf6 (15.Rd1 Qc4 16.Bc6 Qc6-+) 15...gf6 (better 15...Qf1 16.Bc6 bc6 17.Bd4-+) 16.Nd4 (16.Rd1 Qc4 17.Bc6 Qc6 18.Nbd2-+) 16...Nd4 (better 16...Qf1 17.Bc6 bc6 18.Ne6 fe6-+) 17.Bc2 Nc2 18.Nc3 Qc3 (better 18...Na1 19.Ra1 Qc3 20.Rb1-+) 19.Rh1 Bb3 (better 19...Na1 20.Rb1-+) 20.Kg1 Ne3 (20...Qa1 21.Kh2 Qe5 22.f4 Qh5 23.Kg1 Qd1 24.Kf2 Qh1 25.Kf3 Ne1 26.Kf2 Qg2 27.Ke1 Rfd8 28.e4 Rd1) 21.Rh3 Ng4 (21...Qa1 22.Kh2 Qe5 23.f4 Qf4 24.Rg3 Ng4 25.Kh3 f5 26.Rg4 fg4 27.Kh4 g3 28.Kh5 Bd1) 22.Rc1 (22.Rc3 Be6 23.Rc7-+) 22…Qc1 0–1. Agiant (1640) – hm9 (1645), lichess.org, 2021.

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.d3).

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 d5 4.d3).

4.Nd2 Bb4-/+ 5.g3 Nc6 6.Bg2 e5 7.e4 d4 8.Ne2 Qe7 9.0-0 Bg4 10.f3 Bh5 11.c3?? (better is 11.a3 Bd6 12.f4-/+) 11...Bd6 (better is 11...dc3 12.Nc3 Bc3 13.Bc3 Qc5 14.d4 Qc3-+) 12.cd4+= 0-0-0 (12...ed4!? 13.Rb1 Rd8+=) 13.d5+= Nd4 (13...Nb8!?+=) 14.Nd4+/– ed4 15.Bd4 h6 16.Qa4 Bc5 17.Bc5 Qc5 18.Kh1 g5 (18...a6 19.Rab1 Qa7 20.Nc4+-) 19.Rfc1 g4?? (better is 19...Qf2 20.Rc2 a6+-) 20.Rc5 gf3 21.Bf3 Bg6 22.Rac1 Ne8 23.Qa7 b6 24.Rc7 Nc7 25.Qc7 1–0. Salvatore – pieeater, ChessWorld.net, 2012.

4.a3 e6 =+.

4.c4 c6 5.Nd2 e6 6.a3 Be7 7.Ngf3 0-0 8.h3 h6 9.g4 Bh7 10.c5 Nfd7 11.Nd4 e5 12.N4f3 Bf6 13.Qb3 e4 14.g5 (better is 14.Nd4!?+=) 14...Bb2-+ 15.Qb2 ef3 16.gh6 Qf6 (16...gh6!? 17.Nf3 Bg6-+) 17.Qf6-/+ Nf6 18.Rg1 (18.hg7 Kg7 19.Nf3 Nbd7+=) 18...Bg6 (18...fe2 19.Rg7 Kh8 20.Be2-+) 19.Nf3 (better is 19.hg7!? Kg7 20.Nf3+=) 19...gh6-+ 20.Nh4 Kh7 21.Kd2 Nbd7 22.e3 Rg8 23.Be2 Bh5 24.Nf5 Be2 25.Ke2 Rg1 26.Rg1 Ne8 27.f4 a5 28.Rb1 ab4 29.Rb4? Nc5 30.d4 Nd7 31.Rb7 Nef6 32.Rc7 Ra3 33.Rc6 Kg6 34.Ne7 Kh5 35.Rd6 Ra2 36.Kd1 Kh4 37.Nd5-/+ Nd5 38.Rd5 Ra7 39.Rd6 h5 40.Rh6 Ra5 41.Rd6 Ra7 42.Rd5?? Nf6-+ 43.Re5 Kh3 ½–½. Cohen Solal,Lennie – Gabriel,Florent (1690), FRA–chT U20, 2004.

4.Nd2 Nbd7 5.Ngf3 =+.

4.Nd2 e6 5.a3 (5.e4 de4 6.Bf6 Qf6 7.de4 Bg6=+) 5...Bd6 (5...Nbd7 6.Ngf3=+) 6.e4 de4 7.Bf6 (7.de4 Ne4 8.Ne4 Be4=) 7...Qf6=+ 8.de4 Bg6 9.Ngf3 Nc6 (9...0-0 10.Bd3=+) 10.Bb5 0-0 (10...Qc3 11.0-0 0-0-0 12.Qe2=+) 11.0-0 (11.Bc6!? bc6 12.0-0=) 11...Ne5=+ 12.Re1 (12.Nd4 a6 13.Be2 Ng4-/+) 12...Nf3 (12...a5 13.c3-/+) 13.Nf3=+ Be5 (13...Rad8!? 14.Qe2 Bh5=+) 14.Ne5= Qe5 15.Bd3 Rfd8 (15...Rad8 16.Qf3=) 16.Qf3 a6 (16...a5 17.b5=) 17.Qe3 b5 (17...Qd4 18.Rad1=) 18.f4+= Qd4 (18...Qd6 19.f5 ef5 20.ef5+=) 19.Kf2 (19.Qd4 Rd4 20.f5 Bh5+=) 19...Qe3 (better is 19...Qf6!?=) 20.Ke3+= f5 (20...c6 21.a4+/–) 21.e5+/– c6 22.Rac1 Bh5 23.c4 Kf8 24.cb5 ab5 25.Rc3 Ra7 26.Ra1 h6? 27.Rc6+- Bf7 28.Bb5 Rd5 29.a4 Rb5+= 30.ab5 Ra1 31.b6 Ra8 32.b7 Rb8 33.Rc8 (33...Ke7 34.Rb8+-) 1–0. foresight – StefanLaasch, internet, 2007.

4.g3 Nbd7 5.Bg2 (5.Bh3 Bh3 6.Nh3 e5-/+) 5...e5-/+ 6.a3 a5 7.b5 Bc5 (7...Be6 8.c4=+) 8.Nf3 0-0 (8...e4 9.de4 de4 10.Nd4=) 9.0-0 Qe7 10.Nbd2 e4 (10...d4 11.Nh4 Be6 12.Bb7=) 11.Nd4 Bg6 12.N2b3 Bd6 13.a4 (13.c4 dc4 14.dc4 Rfd8=+) 13...Ne5 14.Qd2 Neg4 (14...Bb4 15.Qe3=+) 15.Bc1 (15.Na5 e3 16.fe3 Ne3 17.Nb7 Nf1 18.Kf1 Ng4+/–) 15...Rfe8 (15...Be5=+) 16.Bh3 (16.Na5 Bb4 17.Nac6 bc6 18.Nc6 Bd2 19.Ne7 Re7 20.Bd2 ed3 21.ed3 Re2-/+) 16...Qd8 (16...e3 17.fe3 Qe3 18.Qe3 Ne3 19.Be3 Re3 20.Bf5=+) 17.e3 (17.Na5 e3 18.fe3 Ne3+/–) 17...ed3 (17...Bb4 18.c3 Bd6 19.f3 ef3 20.Rf3-+) 18.cd3 Ne5 (18...Bb4 19.Qc2=+) 19.Na5-/+ c5 20.Nb7 cd4 21.Nd8 Nf3 22.Kh1 Nd2 23.Bd2 Red8 24.ed4 Bd3 25.Rfc1 Ne4 26.Be1 Rdb8 27.Bd7 Ra7 28.Bc6=+ Nf6 29.Bd2 h6 30.f3 Bc4 31.Rcb1 Bd3 32.Rb2 Rc7=+ 33.Bc1 ½–½. Hoyos,Astrid – Sheldon,Ruth (2095), Wch U20 Girls, 1994.

4.g3 e5 5.Be5 Bb4 6.c3 =+.

5.b5 Bc5 6.e3 Nbd7 7.Be2 a6 8.d4 Bb6 (8...Bd6 9.ba6 ba6 10.c4+=) 9.ba6= ba6 10.c4 c6 11.Nc3 0-0 12.0-0 a5 13.a4 (13.Nh4 Be4+=) 13...Qc7 (13...dc4 14.Bc4 Bc7 15.Bd3+=) 14.cd5 (14.Nh4 Rab8+/–) 14...cd5 (14...ed5 15.Ba3 Rfe8 16.Rc1+=) 15.Nb5 (15.Nh4+/–) 15...Qd8? (better is 15...Qc2!? 16.Ba3 Rfc8+=) 16.Ba3+- Re8 17.Nd6 Rf8 (better is 17...Ne4!? 18.Ne8 Nc3+-) 18.Nf5 ef5 19.Bf8 Qf8 20.Bb5 Qd6 21.Rc1 g6 (21...f4 22.Rc6 Qb8 23.Qd3+-) 22.Rc6 Qe7 23.Ne5! Ne5 (23...Bd8 24.Nd7 Nd7 25.Qf3+-) 24.Rb6 (24.de5 Ng4 25.Rb6 Qe5+-) 24...Qc7 (24...Neg4 25.Qc2 Ne4+-) 25.Rf6 (better is 25.de5 Qb6 26.ef6 Qf6 27.Qd5+-) 25...Ng4+/– 26.g3 (better is 26.Rg6! fg6 27.g3+/–) 26...Nf6+= 27.Qc1 Rc8 28.Qc7 Rc7 29.Kg2 Ne4 30.h3 Nc3 31.h4 Rb7 32.Bc6 Rb6 33.Bd7 Rb4 Attacking the isolated pawn on a4 34.Rc1 Na4 35.Rc8 Kg7 36.Ba4 Ra4 37.Ra8 Kf6 38.Ra6 Ke7 39.Kf3 Kd8 40.Kf4 Kc7 41.Ra7 Kb6 42.Rf7 Ra1 43.f3 a4+/– 44.Rf8 a3= 45.Ra8 a2 46.Ke5 Kc6 47.Ra3 ½–½. Wich,Manuela – Sancar,Kenan, Karl Mala mem op, 2004.

5.Qd2 Na6 6.a3 Bd6 =+.

5.Qd2 Bd6 =+.

5.Nbd2 Bb4-/+ 6.g3 0-0 7.Bg2 Qd6 8.0-0 Nc6 9.Bf6 gf6 10.Nh4 Bg4 11.h3 Bh5 12.Kh2 Bc3 13.Ndf3? Ba1-+ 14.Qa1 Kg7 (15.Rb1 Rab8-+; 14...Ne5 15.Rb1-+) 0–1. mferzman – marekt, ChessWorld.net, 2008.

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.d4).

4.c3 Nc6 5.a3 g6 6.e3= Bg7 7.Bd3 Qd6 8.h3 (8.Nf3 e5 9.Bb5 e4=) 8...Bd7 9.Nd2 a6 (9...e5 10.b5 Ne7 11.de5 Qe5 12.Ngf3=) 10.Nb3 (10.c4 0-0+=) 10...0-0 11.Ne2 b5 (11...b6 12.a4 e5 13.Ba6 ed4 14.ed4=) 12.Nc5 (12.a4 Ne7=) 12...Ra7 (12...e5 13.f3=) 13.Qd2 e5 14.de5 (14.a4!?=) 14...Ne5=+ (worse 14...Qe5 15.c4 Qg5 16.Nd7 Nd7 17.Bg7 Kg7 18.cb5+-) 15.f4 (better 15.Nd4!?=+) 15...Nd3-/+ 16.Qd3 Bf5 17.Qd2 Rd8 (17...Re8 18.a4 c6 19.0-0-/+) 18.Nd4 Be4 (18...Bd7 19.0-0=+) 19.0-0-0 (better 19.a4 ba4 20.Ra4=+) 19...a5?? (19...c6 20.Rhf1-/+) 20.Rhg1?? (better 20.Nb5 Qb6 21.Na7 Qa7 22.Rhf1+- (22.Ne4?! Ne4 23.Qe1 Qa6=)) 20...ab4 21.cb4 c6 (21...Qb6 22.g4-/+) 22.g4 h6 (22...Re8 23.Qc3=+) 23.Rdf1 (better 23.g5!? hg5 24.fg5=) 23...Nd7-/+ 24.Ne4 de4 25.Kb1 (25.Rd1 Nb6-/+) 25...Nb6 26.Nb5?? (better 26.Qc1 Nc4 27.Rd1-/+) 26...Qd2-+ 27.Bg7 cb5 (27...Qd3 28.Kc1 cb5 29.Rh1 Rc8 30.Bc3 Rc3 31.Kb2 Nc4 32.Ka1 Rca3) 28.Rd1 Qe3 29.Rd8 Kg7 30.Rgd1 Qf4 (30...Qb3 31.Kc1 Rc7 32.Kd2 Rc2 33.Ke1 Qe3 34.Kf1 Qf2) 31.R8d6 Nc4 32.Rd8 Na3 33.Ka2 Nc2 (33...Qf2 34.R1d2 Nc4 35.Kb3 Qe3 36.R8d3 Nd2 37.Kc2 Ra2 38.Kd1 Qd3 39.Ke1 Nf3) 34.Kb2 Qf2 (34...Qf6 35.R8d4 Nd4 36.Rg1 Qf2 37.Kc3 Ra3) 35.R8d2 Qg3 (35...Qf6 36.Kb3 Ra3 37.Kc2 Qc3 38.Kb1 Ra1) 36.Rc2 Qh3 (36...Qa3 37.Kb1 Qa1) 37.Rdd2 Qg4 (37...Qa3 38.Kb1 Qa1) 38.Rg2 Qf4 39.Rcf2 Qe5 40.Kb3 e3 (40...Qd5 41.Kb2 Qd4 42.Kb3 Qc4 43.Kb2 Qb4 44.Kc1 Ra1 45.Kc2 Ra2 46.Kd1 Qb1) 41.Rb2 Qd5 42.Kc2 Qg2 (42...Qg2 43.Kd3 Qb2 44.Ke3 f5 45.Kf4 Qd2 46.Kg3 Ra3 47.Kh4 Qb4; 42...Rc7 43.Kb1 Qd1 44.Ka2 Ra7) 0–1. TWW_LONDON – Zambanath, lichess.org, 2020.

4.Nc3 Bb4 5.e3 Ne4 6.Nge2 Qh4 7.g3 Qf6 8.f4 Nd6 (8...0-0 9.a3 Ba5 10.Bg2-+) 9.a3 (9.Nc1 c5-+) 9...Ba5 10.Bg2 (10.Nc1 Ne4 11.N1a2 c5-+) 10...Nc4 (10...0-0 11.Rb1-+) 11.Qc1 (11.Bc1 c5-+) 11...c5 12.0-0 cd4 13.ed4 (13.Nd4 Nc6 14.Ncb5 Nb2 15.Qb2 0-0-+) 13...g6 (13...Nc6 14.f5 Nd4 15.fe6 Ne2 16.Ne2 Qe6 17.Bg7-/+) 14.Nb5 (14.Nb1 Nc6-+) 14...Bd7 15.Nbc3 Nc6 16.Bh3 (better is 16.Nd1-+) 16…Nd4 (17.Rb1 Bb6-+) 0–1. islanderfan (1670) – pierred (1800), net–chess.com, 2006.

4.e3 Bd6 5.a3 Nbd7 6.Bd3 0-0 7.Nf3 a5 8.c3 e5 9.de5 Ne5 10.Ne5 Be5 11.Nd2 Re8 12.Be2 ab4 13.ab4 Ra1 14.Qa1 Ne4 15.Ne4 de4 16.0-0 Qh4 17.g3 Qf6 18.Rb1 Rd8 19.Rd1 Re8 20.Rd2 Qe7 21.Qd1 Bf5 22.c4 Bb2 (22...Qb4? 23.Rd8 Qe7 24.Re8 Qe8 25.Be5+-) 23.Rb2 Rd8 24.Rd2 Ra8 25.Qb3 b6 26.b5 h6 27.Qc3 Ra3 28.Qc2 ½–½. pascals1975 – byron_de (2170), ChessWorld.net, 2003.

4.Nf3 Bb4 5.c3 Bd6 6.Ba3 -/+.

4.Nf3 Bd6 5.e3 0-0 (5...Bb4 6.c3 Bd6 7.Ba3-/+) 6.c3 Nbd7 7.Bd3 c6 8.Qc2 Ng4 (8...a5 9.a3=+) 9.h4 (better is 9.Bh7!? Kh8 10.Bd3+/–) 9...Ndf6 10.Ng5 g6 11.h5 Nh5 (better is 11...h6 12.Nf3 g5=) 12.Rh5 (better is 12.Nh7 Kh7 13.Rh5 Kg7 14.Rh1=) 12...gh5-+ 13.Bh7? (13.Nh7 Re8 14.e4 de4 15.Be4-+) 13...Kh8 (better is 13...Kg7 14.Nh3 f5 15.Bf5 ef5-+) 14.Bg8+= f5 (14...Rg8 15.Qh7) 15.Nf7 Rf7 16.Bf7 Qg5 (better is 16...Qh4 17.g3 Qh2=) 17.Qd3?? (17.Bc1 Nf6 18.g3 Qg7 19.Bh5 Nh5-+) 17...Nh2?? (17...Kg7 18.Be8-+) 18.Nd2 (18.Qe2 Qg2 19.Qh5 Kg7=) 18...Qg2?? (18...Kg7!? 19.Be8 Kf8 20.Bh5 Qh5-+) 19.0-0-0 (19.Bh5!? Ng4 20.Bg4 Qg1 21.Ke2 Qg4 22.Nf3+=) 19...Ng4 20.Rf1 (20.f3!? Nf2 21.Qe2=+) 20...h4-/+ (20...Nf2 21.Qe2 Bg3 22.Qh5 Kg7 23.Qg6 Kf8 24.Ba3+=) 21.Qe2 h3 22.Qd1? (22.Qe1!?-/+) 22...h2 (better is 22...Nf2 23.Qh5 Kg7 24.Rf2 Qf2 25.Qg6 Kf8 26.Be6 Ke7 27.Bc8 Rc8 28.Qh7 Kd8 29.Qh3 Kc7-+) 23.f4?? (better is 23.Bg6-+) 23...Kg7 (23...Ne3?! 24.Qh5 Kg7 25.Re1-+) 24.Bh5 (24.Re1 Kf7 25.Rh1 Ne3 26.Qh5 Kg7 27.Rh2 Qg1 28.Nf1 Qf1 (28...Nf1?? 29.Qh8 Kf7 30.Rh7 Qg7 31.Rg7 Kf6 32.Qh6) 29.Kd2 Qd1 (29...Qf4?! 30.Qh8 Kg6 31.Qh7 Kf6 32.Qh8 Kg6 33.Qh7 Kf6 34.Qh8 Kg6=) 30.Qd1 Nd1 31.Kd1 Bf4-+) 24...Ne3 25.Bf3 Qh3 26.Rg1 hg1Q (26...Kh7 27.Qe1 hg1Q 28.Qg1 Bf4 29.Ba3-+) 27.Qg1 Ng4 28.Kb1 (28.Be2 Bf4 29.c4 Qe3 30.Qe3 Ne3-+) 28...Bf4 29.Bg4 fg4 30.Bc1 (30.Nb3 e5-+) 30...Qd3 31.Kb2 Bd2 32.Bd2 (32.Qg4 Kf8 33.Bd2 Qd2 34.Kb3 a5 35.Qf3 Ke7-+) 32...Qd2 33.Kb3 e5 34.Qg3 Bf5 35.Qe5 Kg6 36.Qd6 Kh5 37.Qe7 Qc2 38.Ka3 Qc3 39.Ka4 Bc2 40.Ka5 Qa3 0–1. Fritz,Marco – Taulien,Hans_Juergen, remoteschach.de, 2001.

5.e3 Ne4 6.a3 Bd7 7.Nd2 Nd2 8.Qd2 0-0 9.Nf3 Be7 (9...a5 10.Bd3=) 10.Ne5 Be8 11.c4 c6 (11...a5 12.Bd3=) 12.c5 f6 13.Nf3 Bh5 14.Be2 a5 15.a4 (15.0-0 Bg6+=) 15...ab4 16.Qb4 Qd7 (16...Nd7 17.Qc3=) 17.a5 Na6 18.Qd2 Bf3 19.Bf3 e5 20.de5 (20.0-0 f5+=) 20...Bc5 21.0-0 fe5 22.Be5 Qf5 (22...Qe7 23.Bf4=) 23.Qb2+= Qg6 (23...Rf7 24.Rfc1+=) 24.Kh1 (24.Qb7 Ra7 25.Qb1 Qe6+/–) 24...Nb4 (24...Bd6 25.Bd6 Qd6 26.Rfc1= (26.Qb7? Rfb8 27.Qb6 Rb6 28.ab6 Qb8-+)) 25.Qc3 (25.Bc3 Nd3 26.Qb7 Ra7+=) 25...Be7 (better is 25...Nd3 26.Bg7 Bb4=+) 26.Rfe1?? (better is 26.Rab1!? c5 27.Rbd1+=) 26...Nd3 (26...Nc2 27.e4 Na1 28.Ra1 de4 29.Qc4 Qf7 30.Qe4-+) 27.Rf1 Ne5 28.Qe5 Bf6 29.Qe6 Kh8 30.Rad1 Ra5-/+ 31.e4 de4 32.Be4-/+ Qg5 33.f4 Qh5 34.g4 Qh3 35.Bg2 Qa3 36.Rd7 Qb4 37.Rfd1 h6?? 38.Be4 Ra1 39.Ra1= Ba1 40.Qg6 Qe1 41.Kg2 Qe2 42.Kg3 Qe3 43.Kg2 Qe2 ½–½. pinski – ahmed sharkawy_1, ChessWorld.net, 2005.

5.Nf3 Nbd7 6.e3 0-0 7.Bd3 =+.

5.Nf3 Nbd7 6.e3 e5 7.de5 Ne5 8.Nbd2 Qe7 (8...a5 9.b5=+) 9.Be2 0-0 10.Qc2 (10.0-0 Bg4=+) 10...Bg4 11.Nd4 (11.0-0 Rfd8=+) 11...Be2-/+ 12.Ne2 Neg4 (12...Rad8 13.0-0=+) 13.h3=+ Ne3 (13...Ne5!?=+) 14.fe3= Qe3 15.Nf1 (15.Qf5 Rae8 16.Qf3 Qg5=) 15...Qg5 16.Rg1 (16.Qd2 Qg2 17.Rg1 Qe4=) 16...Rfe8 (16...Rae8 17.Kd1=) 17.Bc1 (17.Kd1 Ne4 18.Nd4 Qh5 19.Nf3 a5=+) 17...Qh4-/+ (Black gets the initiative) 18.g3 Qh3 19.Be3 a5 20.b5 Ng4 21.Qd3 (21.Bd4 c5 22.bc6 bc6-/+) 21...Re4 22.0-0-0? (22.Kd2 Ne3 23.Ne3=+) 22...Rae8-+ (22...Ne3?! 23.Ne3 Rae8 24.Rh1 Re3 25.Rh3 Rd3 26.Rd3 Re2 27.Rd5 Ra2 28.b6-/+) 23.Qd5 Ne3 24.Ne3 Re3 25.Nf4 Qd7 26.Qb3 a4! 27.Qb2 Qg4 28.Rdf1 Rg3 29.Qf2 Bf4 30.Kb1 Qf5 31.Ka1 Rg1 32.Qg1 Qc2 33.Qc5 Re2 34.Qa3 Be5 35.Rc1 Bc3!? (35...Bc3 36.Qc3 Qa2) 0–1. Rudolf – pierre (2200), internet, 2007.

5.Nf3 Nbd7 6.g3 0-0 7.Bg2 e5 8.e3 (8.de5 Ne5 9.Ne5 Be5=+) 8...e4-/+ 9.Nfd2 Nb6 10.0-0 Bg4 11.f3 ef3 12.Nf3 Qe7 13.Nbd2 (13.Qd3 Nc4 14.Bc1 Qe4 15.Qe4 Ne4-/+ (15...de4?! 16.Ng5=)) 13...Qe3-+ 14.Kh1 Qh6 (14...Ne4 15.Ne4 de4 16.Qe1-+) 15.Bc1 Qh5 16.Kg1 Rae8 17.Bb2 Re3 18.Rf2? Ne4 19.Ne4 de4 20.Qd2 Nc4 21.Qc2 ef3 22.Bf1 Bf5 23.Qc1 Qg4 24.Bc4 Bg3! 25.Qe3?? Bf4 26.Kf1 Be3 27.Bd5 Bd3 28.Ke1 Qg1 29.Rf1 Qf1 0–1. I need chocolate... – michaelbuss, ChessWorld.net, 2005.

5.c3 Bd6 6.Bb5 (6.Ba3 Nc6-/+) 6...c6 7.Ba4 (7.Bd3 Nbd7-/+) 7...b5 (7...0-0 8.Ba3-+) 8.Bb3 (8.Bc2 Nbd7-/+) 8...0-0 9.Nf3 Nbd7 10.0-0 (10.a4 ba4 11.Ba4 Qb6-/+) 10...Qc7 11.Nbd2 e5 12.de5 Ne5 13.c4 (13.a4 Nc4 14.Nc4 dc4-+) 13...Nf3 (13...dc4 14.Bc2-+) 14.Nf3 bc4 15.Bc2 Bg4 (15...Qe7!? 16.Qd2-+) 16.Bf6 gf6 17.h3 Bh5 18.g4 (18.Rc1 Rab8-+) 18...Bg6 19.Bg6 (19.Qd2 Rab8-+) 19...fg6 20.Nh4 (20.Rb1 Rab8-+) 20...Rab8 21.Qc2 (21.Rc1 Rb2 22.Rc2 Rb6-+) 21...Kg7 (21...Qe7 22.Nf3-+) 22.f4 (22.Nf3 Rb6-+) 22...Rb6 23.Rab1 Rfb8 24.Rb6 Qb6 25.Nf3 (25.Ng2-+) 25...Qe3 26.Kg2 (26.Qf2 Bc5 27.Qe3 Be3 28.Kh1 c3-+) 26...Qf4 (better is 26...c3 27.Re1 Qf4 28.Qf2-+) 27.Qf2 (27.Kh1 Be5 28.Qc1 Qg3 29.Ne5 Qh3 30.Kg1 Qg3 31.Kh1 fe5-+) 27...Be5 (27...c3 28.Kh1 Rb2 29.Qa7 Kg8 30.Qg1-+) 28.Ne5 Qf2 29.Rf2 fe5 30.Kf3 (30.Rc2-+) 30...Rf8 31.Ke2 Rf2 32.Kf2 Kf6 33.Ke3 Ke6 (better is 33...Kg5!? 34.Kf2-+) 34.Kd2 d4 35.a4 e4 36.h4 Kd5 (37.Kd1 c3-+) 0–1. kamera (1605) – tetsy (1705), GameColony.com, 2002.

5.c3 Be7 6.a4 0-0 7.Nf3 Nbd7 (7...c5 8.Ba3-/+) 8.Be2 c5 9.dc5 (9.0-0 c4-/+) 9...Nc5-+ 10.Nbd2 a6 (10...Bd7 11.c4-/+) 11.0-0 Bd7 (11...b6 12.c4-/+) 12.Ne5 (12.c4 b6-/+) 12...Bc6 13.Nc6 bc6 14.Nf3 (14.c4 Qa5-/+) 14...Qb6 15.Ba3 Rfe8 (15...Nfe4 16.Rb1 Qc7 17.Qc2-/+) 16.Ne5 (16.Qc2 Nfe4-/+) 16...Qc7 17.Nf3 Rab8 (17...Nfe4 18.Qc2-/+) 18.Rb1 (18.Bc5 Bc5 19.Ba6 Qa5-/+) 18...a5 (18...Rb1 19.Qb1 Na4 20.Qc2 Ba3 21.Qa4-+) 19.Rb8 Rb8 20.Qc2 Nfe4 21.Nd4 (21.c4 Rb3 22.Bc5 Rc3-/+) 21...e5 (21...Bd6 22.Kh1-/+) 22.Nf3 (22.Nf5 Bf8 23.c4 g6-/+) 22...f6 (better is 22...Rb3 23.Bb2 Qb7-+) 23.Rb1?? (23.c4 Qb7-/+) 23...Rb7 (better is 23...Rb1 24.Qb1 Na4-+) 24.Rb7-/+ Nb7 25.Qb3 (25.Bb2 Bd6-/+) 25...Ba3 26.Qa3 c5 (27.Qb3 c4-/+; 26...Qb6 27.Qe7 Nbd6 28.Bd3-+) 0–1. kamera – ce (1745), GameColony.com, 2002.

5.c3 Be7 6.Nd2 Nc6 7.Ngf3 0-0 8.Bd3 Bd6 9.0-0 e5 10.de5 Ne5 11.Ne5 Be5 12.f4 (12.Qc2 Qe7+=) 12...Bd6-/+ 13.Nf3 Bg4 14.h3 Be6 15.Qc2 Re8 16.Rad1 c6 17.Ng5 g6 (17...h6 18.Nh7 Ne4 19.Be4 de4 A) 20.Qe4?? Bb3 21.Qd4 Bd1-+ (21...Kh7?! 22.ab3 Bf8 23.Qc4=); B) 20.c4 Kh7 21.Be5-+) 18.Ne6 (18.c4!? Bc5 19.Kh1=) 18...Re6-/+ (18...fe6 19.c4 Rf8 20.Bg6+/–) 19.Rf3 Qb6 20.Re1 Rae8 21.Bc1 Nh5 (better is 21...Ne4-+) 22.Bd2?? (better is 22.f5 Rf6 23.fg6 hg6 24.Rf6 Nf6 25.Bg6+=) 22...Bf4 (22...Nf4 23.Bf1 Qc5 24.Qb3-+) 23.g4? (better is 23.Rb1 Qc5 24.Rb7-+) 23...Be3 24.Be3 Re3 25.Rfe3 (25.Ree3 Re3 26.Kg2-+) 25...Re3 26.Qf2 (26.Re3 Qe3 27.Qf2 Qd3 28.gh5 Qc3 29.hg6 hg6 30.Qa7-+) 26...Re1 (26...Re1 27.Bf1 Ng3 28.Qb6 ab6-+ (28...Nf1?! 29.Qb7 Nd2 30.Kf2=; 28...Rf1 29.Kg2 ab6 30.Kg3-+)) 0–1. preethan (2135) – mbarker (2410), net–chess.com, 2015.

5.c3 Be7 6.Nf3 0-0 -/+.

4.a3 e6 5.e3 Nc6 6.c4 dc4 7.Bc4 Bd6 8.Nf3 Bg4 9.0-0 Bf5 10.Nc3 h6 11.Qb3 0-0 12.Rfc1 Bg4 13.Be2 Bf5 14.Nh4 Bg4 15.f3 Bh5 16.Nb5 Nd5 17.Nd6 cd6 18.g4 (Better is 18.Nf5!+=) 18...Qh4-/+ 19.gh5 Qg5 20.Kf2 Qh4 21.Kg1 Nce7 22.f4 Qh3 23.Bf1 Qg4 24.Bg2? Qh5 25.Re1 Rac8 26.Kf2 Qg6 27.Rg1?? Qc2 28.Kf3 Qb3 29.Bc1 Rc3 30.Bd2 Rc2 31.Rgd1 Qc4 32.Bf1 Qc6 33.Kg3 Qd7 34.Kf3 e5 35.fe5 Qf5 36.Kg3 Qe4 37.Bg2 Nf5 38.Kf2 Qe3 39.Kf1 Rd2 40.Rd2 Qd2 41.Bd5 Ne3 42.Kg1 Nd5 43.Rf1 Qd4 44.Rf2 Rc8 45.Kg2 Nf4 46.Kg3 Rc3 47.Rf3 Rf3 48.Kf3 Qe5 49.Kf2 d5 50.Kf3 d4 51.Kf2 d3 52.Kf3 d2 53.Kf2 d1Q 54.Kg3 Ng6 55.Kf2 Qde2 56.Kg1 Q5h2 0–1. Huib – kool_aid, HCL–B2286 playchess.de, 2003.

4.b5 e6 5.Nd2 c5 6.c4 Qa5 7.a4 dc4 8.Rc1 cd4 9.Rc4 (better is 9.Bd4!? Nbd7 10.Rc4+=) 9...e5-/+ 10.e4? (better is 10.e3!? de3 11.fe3-/+) 10...Be6 11.Rc1 Bb4 (11...Ne4 12.Ngf3 Nd7 13.Bd3-+) 12.f3 (12.Bd3-+) 12...0-0 13.Bc4 Nbd7 14.Ke2 Bd2 15.Qd2 Qa4 16.Be6 fe6 17.Nh3 Qb5 18.Kf2 (18.Ke1-+) 18…Ne4 (18...Ne4 19.Ke1 Nd2 20.Kd2 Qb2 21.Rc2 Qb4 22.Ke2 e4-+) 0–1. Kopec,Jerzy – Prazmowski,Wlodzimierz (1730), Warszawa ch41 opB Poland, 2008.

4.Nc3 e6-/+ 5.a3 Nbd7 (5...a5 6.b5-/+) 6.h3 (6.e3 a5-/+) 6...h6 (6...a5 7.g4 Bg6 8.ba5 Ra5 9.Nf3-/+) 7.e3=+ Ne4 (7...a5 8.b5=+) 8.Nce2 (8.Bd3 Nc3 9.Bc3 Bd6=+) 8...Bd6-/+ 9.Nf3 c6 (9...0-0 10.Nc3-/+) 10.Ne5 (10.Nc3 a5=+) 10...Nb6 (10...a5 11.g4 Qh4 12.Nd3 Bg4 13.Bg2-+) 11.Nf4=+ Na4 12.Bc1 (12.Qc1 Qb6=+) 12...Nac3-/+ 13.Qh5 Be5 14.de5 Ng5 15.g3?? (better is 15.Bd3=) 15…g6 -+ (16.Nd5 Qd5-+; 15...Bc2 16.Bb2 g6 17.Qg4-+) 0–1. Kopp,Norbert – Iwanow,Thomas, Pinneberg–ch, 2003.

4.Nf3 Nc6 5.b5 (5.Nh4 Be4 6.f3 Bg6=) 5...Nb4 6.Na3 g6 (better is 6...e5!? 7.de5 Ne4=) 7.c3+- e6 (7...Qd6 8.cb4 Qb4 9.Qd2+-) 8.Qb3 Qd6 (8...a5 9.cb4 a4 10.Qc3+-) 9.Rc1 (9.Nd2 Ne4+-) 9...a5 (better is 9...Ne4 10.e3 Nf2 11.Kf2 Nd3 12.Bd3 Bd3+-) 10.cb4=+ Qb4?? (10...a4 11.Qc3 Ne4+/–) 11.Qb4 Bb4 12.Kd1?? 0-0?? 13.Bc3?? Bc3 14.Rc3=+ Ne4 (Black gets strong initiative) 15.Rc7 Nf2 16.Ke1 Nh1 17.e3 b6-+ 18.Be2 Rac8 19.Rc8 Rc8 20.Kd2 Nf2 21.Ne5 Ne4 22.Kd1 Nc3 23.Ke1 Ne2 24.Ke2 Be4 25.g3 Rc3 (26.Nac4 dc4-+) 0–1. M8IN3 – Andersen30, Live Game Caissa's Web, 2005.

5.a3 Bd6 6.Ngf3 Nbd7 7.e3 Ne4 8.c4 dc4 9.Bc4 Nb6 10.Be2 0-0 11.Bd3? Nf2-/+ 12.Kf2 Bd3 13.e4 Bf4 14.Qb3 Bd2 15.Nd2 Bb5 16.a4 Bd7 17.Nf3 Nc8 18.h4 Qf6 19.Rh3 Qf4 20.Qd3 e5 21.Bc1 Qf6 22.de5? Qb6 23.Be3 Qb4 24.Rb1 Qa4 25.Rg3 Re8 26.Bh6 g6 27.h5? Bc6-+ 28.Rg4 Nb6 29.hg6 fg6 30.Kg3 Qc4 31.Qe3 Nd7 32.Qf4 Qe6 33.Rh1 Ne5 34.Rgh4 Nf3 35.gf3 Qe5 36.Bg5 Qf4 37.Bf4 Re7 38.Bg5 Rf7 39.e5 Re8 40.Re1 Bd5 41.f4 Re6 42.Bh6 Ra6 43.Rg4 Ra3 44.Kh4 Be6 45.Rd1 Rd7 46.Rf1 Bg4 47.Kg4 Rdd3 48.Rg1 Rh3 49.Bg5 h5# 0–1. Betke,Arno – Higgelke,Anne, Mecklenburg LL, 1992.

5.a3 Ne4 6.Ngf3 Nd7 7.e3 Be7 8.c4 0-0 9.c5 c6 10.Ne5 (10.Ne4 de4 11.Nd2 a5=) 10...Bf6 (10...Ne5!? 11.de5 b6+=) 11.Be2= Be5 12.de5 Nd2 13.Qd2 a5 14.h4 (14.0-0 Qc7=) 14...h6 15.g4 Bh7 16.Bd3 (16.Bd4!?=) 16...Bd3+= 17.Qd3 ab4 18.ab4 Ra1 19.Ba1 b6 20.Bd4 (20.g5!? h5 21.0-0-/+) 20...bc5 21.bc5 Qa5 22.Qc3 (22.Qd2 Ra8-/+) 22...Qc3 23.Bc3 Nc5 24.0-0 Ra8 25.Rb1 g6 26.Rb6 Ra6 27.Rb8 Kg7 28.h5 (better is 28.Bd4!? Nd3 29.Rb3-/+) 28...Ne4 29.Be1 (29.Bb2 gh5 30.gh5 c5-+) 29...c5 (29...Ra1!? 30.Kf1 Nc5 31.Ke2-+) 30.Rc8 Ra1 31.Kf1 c4 32.Ke2 Ra2 33.Kf1 gh5 34.gh5 Ra1 35.Ke2 Ng5 36.Bb4 Ra2 37.Kf1 Ne4 38.Be1 c3! 39.f3 Nd2 40.Bd2 cd2 41.Ke2 d1Q! 42.Kd1 Rh2 43.f4 Rh5 44.Ke2 Rh3 45.Kf2 h5 46.Re8 h4 47.Ra8 Rg3 48.Ra7 Rg6 49.Ra1 Kh6 50.Rh1 Kh5 51.Rh3 Kg4 52.Rh1 h3 53.Rh2 Rh6 54.Rh1 h2 55.Kg2 d4! 56.ed4 Kf4 57.Rf1 Ke4 58.Kh1 Kd4 59.Rf7 Ke5 60.Rf2 Ke4 61.Re2 Kf3 62.Re5 Kf4 63.Re1 e5 64.Rf1 Kg4 65.Rf8 Rh5 66.Rf7 Rh3 67.Rf8 e4 68.Rf7 e3 69.Rf8 e2 70.Rg8 Kf3 71.Rf8 Ke3 72.Re8 Kd2 (72...Kd2 73.Rd8 Rd3 74.Re8 e1R 75.Kh2 Re8 76.Kg1 Rg8 77.Kf2 Rgg3 78.Kf1 Rdf3) 0–1. Kruchinin,Anatoly V (2015) – Fedotov,Ivan, Vladimir op–B, 2004.

5.a3 Be7 6.Ngf3+= 0-0 7.e3 Nbd7 8.c4 a5 9.b5 dc4 (9...c6 10.c5+=) 10.Nc4= a4 11.Be2 Be4 (11...Nb6 12.Rc1=) 12.0-0+= c6 13.bc6 Bc6 (13...bc6 14.Bd3+=) 14.Nfe5 (14.Rc1 Qc7+=) 14...Ne5= 15.Ne5 Bd5 16.Bf3 (16.Qc2 Nd7=) 16...Qb6 17.Bd5 ed5 18.Rb1 Qa5 (18...Rfc8 19.Bc3 Qe6 20.Bb4=) 19.Qd3 Qa6 20.Qa6 Ra6 21.Rfc1 (21.f3 Rb8=) 21...Rb6+= 22.f3? (better is 22.Nd3!?+=) 22...Rb2!-/+ 23.Rb2 Ba3 24.Rcb1 Bb2 25.Rb2 Ra8 (better is 25...Rb8!?-+) 26.Rb7+= a3 27.Rb1 (27.Rf7 a2 28.Kf2 a1Q 29.Rf6 gf6 30.Nd7 Kf7 31.f4 Ra2 32.Kg3 Qe1 33.Kh3 Qe3 34.Kh4 Rg2 35.Ne5 fe5 36.de5 Qf4 37.Kh3 Rh2) 27...Ne8 28.Nc6 Nc7 29.Ra1 Ra4 30.Kf2 (30.Ne5 g5+=) 30...Kf8 (30...Rc4!? 31.Ne7 Kf8 32.Nd5 Rc2 33.Kg3 Nd5 34.Ra3 g5-/+) 31.Ne5+= Nb5 32.Nd7 Ke7 (better is 32...Ke8!? 33.Nb6 Rb4-/+) 33.Nb6= Ra5 34.Nd5 Kd6 35.Nb4 Ra4 36.Nc2 (36.Nd3 Rc4=) 36...Kd5+= 37.Rc1 a2 38.e4 (38.Ke2 Rc4 39.Kd2 Na3+=) 38...Kc4 39.d5? (better is 39.Na1 Kd3 40.d5-/+) 39...Kb3-+ 40.Na1 Kb2 41.Rd1 (41.Rf1 Nc3 42.Ke3 Nb1-+) 41...Nc3 42.Re1 f6 43.Ke3 Nb1 44.f4 (44.d6-+) 44...Ka1 45.e5 (45.d6 Ra3 46.Kd4 Kb2 47.Re2 Kb3 48.Ra2 Ra2-+ (48...Ka2?! 49.d7 Ra8 50.e5 fe5 51.fe5=)) 45...fe5 46.fe5 Kb2 47.Re2 Kb3 48.Ra2 Ra2 49.d6 Rd2 50.Ke4 Nc3 51.Kf5 Nb5 52.Ke6 Nd4 53.Kd5 (53.Kd7 Kc4 54.e6 Nf5-+) 53...Nf3 54.Ke4 (54.Ke6 Rg2 55.d7 Rd2-+) 54...Ne5! 55.Ke5 Rg2 56.h4 (56.d7 Rd2 57.Ke6 h6-+) 56...g5 57.d7 Rd2 58.hg5 Rd7 59.Ke6 Ra7 0–1. Farkas,Miso – Popov,Stevan (2205), Vojvodina Cup, 2008.

5.e3 Bb4 6.Ngf3 0-0 7.c3 Be7 8.Ne5 Nbd7 9.Ndf3 c5 10.Be2 cd4 11.ed4 Ne4 12.0-0 Ne5 13.Ne5 Bd6 14.Bg4 Be5 15.de5 Bg4 16.Qg4 Rc8 17.Bc1 Qc7 18.f4? Qc5 19.Kh1 Qc3 20.Rb1 Nf2 (21.Kg1 Ng4-+) 0–1. patman007 – michaelbuss, ChessWorld.net, 2005.

5.a3 Bd6 6.Bb5 (6.Nf3 Nbd7+=) 6...c6 7.Bd3 Bg6 8.Nc3 Nbd7 9.h3 0-0 10.Nf3 Qe7 11.Nh4 a5 12.Ng6 hg6 13.b5 e5 14.f3?? (better is 14.0-0+=) 14...ed4-+ 15.Ne2 de3 16.g4 (16.0-0 c5 17.c3 Rfe8-+) 16...Ne5 (16...Ne4 17.0-0 Nd2 18.f4-+) 17.Be5 (17.0-0 g5-+) 17...Qe5 (better is 17...Be5!? 18.c3 Ne4 19.0-0-+) 18.f4 Qe7 19.h4 (19.bc6 Ne4 20.0-0-+) 19...Ng4 20.f5 (20.Qc1 Nf2 21.0-0 Qh4 22.Qe3 Ng4-+) 20...Ba3 (20...Nf2 21.Qc1 Nh1 22.Kf1-+) 21.fg6 (21.Ra3 Qa3 22.0-0 Nf2-+) 21...Bb4 (better is 21...Nf2 22.Qb1 Nh1 23.Ra3 Qa3 24.bc6 bc6 25.Kf1 fg6 26.Kg2-+) 22.c3 Bd6 (22...Nf2!? 23.Qb1 Nh1 24.bc6 bc6 25.cb4 fg6 26.Qb2-+) 23.Qc2 Qf6 (better is 23...Nf2 24.Rg1 Qh4 25.bc6 Nd3 26.Kd1 Nf2 27.Kc1 bc6 28.Nd4-+) 24.Bf5 (24.gf7 Rf7 25.0-0-0-+) 24...Nf2 (better is 24...fg6 25.0-0-0 gf5 26.Rhg1-+) 25.Rg1 (25.gf7 Rf7 26.Rf1 c5-+) 25...fg6 26.Bg6 (26.bc6 gf5 27.cb7 Rab8-+) 26...Nh3 (better is 26...Bh2 27.Qf5 Bg1 28.Qh5-+) 27.0-0-0 Ng1 28.Rg1 cb5 (28...a4!? 29.Bh7 Kh8 30.Qg6-+) 29.h5 (29.Qd3 Qe6 30.Nd4 Qe5-+) 29...a4 30.h6 Ba3 31.Kb1 Qf1 32.Rf1 Rf1 33.Ka2 Bc5?? (33...Be7 34.Qd3 gh6 35.Qe3+-) 34.hg7 (better is 34.Bh7 Kf7 35.Qg6 Ke7 36.hg7+-) 34...Kg7= 35.Bd3?? (35.Qd3 Rf2 36.Bh5 b6=) 35...Rf2?? (better is 35...Rh8 36.c4 dc4 37.Bc4 Rhh1-/+) 36.Bb5 a3 37.Qd3 Rd8 38.Kb3 b6 39.Nc1?? (better is 39.Qd1=) 39...Rb2 40.Ka4 Ra8 41.Ba6 a2 42.Na2 Ra2 (better is 42...Ra6 43.Qa6 Ra2 44.Kb5 Ra6 45.Ka6 e2 46.c4 d4 47.Kb5 d3 48.Kc6 e1Q 49.Kc7 d2 50.Kd7 d1Q 51.Kc6 Qe8 52.Kb7 Qdd7 53.Ka6 Qec8) 43.Kb3 (43.Kb5 R8a6 44.Qf5 R6a5 45.Kc6 Kh6 46.Qh3 Kg5 47.Qg3 Kf5 48.Kd5 Rd2 49.Kc4 Ra4 50.Kb5 Rg4-+) 43...R8a6 44.Qd5 R6a3 45.Kc4 e2 (45...Ra4 46.Kb3 Kh6 47.Qh1 Kg5 48.Qg1 Kf4 49.Qf1 Ke5-+) 46.Qg5= Kf7 47.Qf4 Ke7 48.Qe5 Kd7 49.Qd5?? (49.Qf5 Kc7 50.Qf7 Kc6 51.Qd5 Kc7 52.Qf7 Kb8 53.Qe8 Kb7 54.Qd7 Ka6 55.Qb5 Ka7 56.Qd7 Ka8 57.Qc8 Ka7 58.Qd7 Ka6 59.Qb5 Kb7 60.Qd7 Ka6=) 49...Kc7 (better is 49...Bd6 50.Qf5 Kc7 51.Qf7 Kb8-+) 50.Qf7= Kb8 51.Qe8 Kc7 52.Qe5?? (52.Qf7 Kc8 53.Qe6 Kb7 54.Qd5 Ka7 55.Qd7 Ka6 56.Qb5 Kb7 57.Qd7 Ka8 58.Qc8 Ka7 59.Qd7 Ka6 60.Qb5 Kb7 61.Qd7 Ka6=) 52...Kd7 53.Qd5 Ke7 (better is 53...Bd6 54.Qf7 Be7 55.Qf5 Kc7 56.Qf4 Bd6 57.Qf7 Kb8-+) 54.Qe5= Kd7 ½–½. grahamtrue (2165) – cristero (2460), net–chess.com, 2015.

5.a3 Nbd7 6.c4 dc4 7.Bc4 a5 8.b5 Bd6 9.Nf3 0-0 10.0-0 Qe7 11.Nc3 Nb6 12.Bd3 Bd3 13.Qd3 Nfd5 14.Ne4 Na4 15.Rfb1 Nb2 16.Rb2 a4 17.Rc2 Ra5 18.Nc5 (18.Nd6 cd6 19.e4 Nb6+=) 18...c6 19.bc6 Bc5 20.Rc5 Rc5 21.dc5 bc6 22.Qc4 Rb8 23.Rc1 (23.Nd4 Qb7+=) 23...Qb7 (23...Rb3!?=) 24.e4+= Nf6 25.Qa4 Qb2 (25...Qa8 26.Qa8 Ra8 27.Nd4 Ne4 28.f3+-) 26.Rd1+- h6 27.Qc6 (27.e5!? Nd5 28.Qc6+-) 27...Qc2+= 28.Qd6 (28.Rf1!?+=) 28...Rb1= 29.Rf1 Ne4 The isolani on c5 becomes a target 30.Qd8 Kh7 31.Qd4 Nc3 (worse 31...Nc5 32.Qd2 Qd2 33.Nd2=) 32.Qd2 Ne2 33.Qe2 Qe2 34.Rb1 Qc2 (34...Qa2!? 35.Re1 Qa3 36.Ne5-+) 35.Re1-/+ Qc5 36.Re3 Qc1 37.Ne1 Qa1 38.g3 e5 39.Kg2 f5 40.Nd3 e4 41.Nf4 g5 42.Ne2 Kg6 43.f3 Qb2 44.Kf2 ef3 45.Rf3 Qb1 46.Ng1 (46.h3 Kf6-/+) 46...Qb6-+ 47.Kf1 Qb5 48.Kf2 (better 48.Ne2!?-+) 48...Qc5 49.Kg2 g4 50.Rf2 Qa3 51.Ne2 h5 52.Nf4 Kh6 53.Kg1 Qe3 54.Kg2 Qe4 55.Kg1 h4 56.gh4 Qe7 57.h5 Kg5 58.Kg2 Qb7 59.Kg1 Kh4 60.Ne2 Qb1 61.Kg2 Qe4 62.Kg1 Qb1 63.Kg2 ½–½. Zak,Pawel (1720) – Sanz Wawer,Daniel (2180), 54th Rubinstein Mem (2) Poland, 2018.

5.a3 Nbd7 6.c4 c6 7.c5 Be7 (7...b6 8.Nf3=+) 8.Nf3 0-0 9.Bd3 Bd3 (9...Ne4 10.Nc3=+) 10.Qd3= a5 (10...Ne4 11.0-0=+) 11.0-0 ab4 12.ab4 Ra1 13.Ba1 Qc7 14.Nbd2 (14.Bb2 b6=) 14...b5 (14...Ra8 15.h3=) 15.Nb3 ½–½. Omar,Gonzalo Martin (1745) – Rezny,Daniel, corr WC15/WS68 ICCF, 2006.

5.a3 Be7 =+.

5.c3 Bd6 6.Bb5 c6 7.Ba4 Nbd7 8.Nd2 e5 9.Ngf3 e4 10.Nh4 Be6 11.g3 Bg4 12.Qb3? (better is 12.f3 ef3 13.Nhf3-/+) 12...b5-+ 13.Bb5 cb5 14.h3 Be6 15.g4 Nb6 16.Nf5 Bf5 17.gf5 Qd7 18.0-0-0 a5 19.ba5 Ra5 20.Rdg1 Rg8 21.h4 Nc4 22.Kc2 (22.Rg5 h6 23.Rg2 Qf5-+) 22...Qf5 23.Rg2 Ng4 24.Kc1 (24.Re1 Nf2 25.Re2 Nd3-+) 24...Nf2 25.Rf1 (25.Nc4 dc4 26.Rf2 Qf2-+) 25...Nd3 26.Kd1 Ne3 27.Ke2 Nf1 (27...Nf1 28.Qd5 Qd5 (28...Nb2?! 29.Qf5 Nd2 30.Qc8 Ke7 31.Qg8-/+) 29.Kf1 Qa2-+) 0–1. Crossman,Chris – Granara Barreto,Sebastian (2245), IECG, 2003.

5.Bd3 Bb4!? 6.Bc3 Bd6 -/+.

5.Bd3 Nbd7 6.Bf5+= ef5 7.Nc3 (7.a3 Nb6+=) 7...f4 (7...Bb4 8.a3 Bc3 9.Bc3-/+) 8.ef4 Bb4 9.Nge2 0-0 10.0-0 Bc3 11.Bc3 Rb8 12.a4 c6 13.Bb2 Qb6 14.Ba3 c5 15.dc5 Nc5 16.Nd4 Rbc8 17.g3 (17.Rb1 Qa6=) 17...h6 (17...Rfe8 18.Rb1 Qa6 19.Bc5 Rc5 20.Re1+=) 18.Re1= Nfe4 19.Nf5 Qf6 20.Qd5 Rfe8 21.Bc5 Rc5 22.Qd7 (22.Re4?? Qa1 23.Kg2 Rd5 24.Re8 Kh7-+) 22...Kf8 23.Rad1?? (better is 23.f3 Qb6 24.Qd4+=) 23...Qf5-+ (23...Rf5?! 24.f3 Qb6 25.Kh1 Ng3 26.hg3 Re1 27.Re1=) 24.f3? (better is 24.Qb7 Rc2 25.Rd4-+) 24...Qd7 25.Rd7 Ng3! 26.Re8 (26.hg3 Re1 Double attack (26...Re1 Discovered attack)) 26...Ke8 27.Rb7 Nh5 28.Ra7 f5 29.a5 Rc2 30.a6 Rc6 (better is 30...Ra2!? 31.h4-+) 31.Ra8 Ke7 32.a7 Rg6 33.Kf2 Ra6 34.Ke3 (34.h3 Ra2 35.Ke1 Kf7-+ (35...Nf4?! 36.Rg8+=)) 34...Nf6 35.h4 Ra1 36.Kd2 Kf7 37.Kc2 Ra4 38.Kb3 Ra6 39.Kc4 Ne8 40.Kb5 (40.h5-+) 40...Nc7 41.Kc5 Na8 0–1. wote – dany59 (1985), gameknot.com, 2012.

5.a3 a5 =+.

5.a3 Bd6 6.e3 Ne4 7.Bd3 0-0 8.Nbd2 Nd2 9.Qd2 Nd7 10.0-0 Be4 (10...Qf6 11.Qe2=+) 11.Be4 (11.Ne5 Bd3 12.cd3 f6 13.Nd7 Qd7=) 11...de4 12.Ne1 (12.Ne5 Nb6 13.Qe2 Na4=+) 12...b6 (12...Nb6 13.Qe2 Na4 14.c4=+) 13.Qc3 (13.f3 f5=+) 13...Nf6 14.f3 Rc8 (14...Qd7 15.Qb3=+) 15.f4 (better is 15.Qc6 Qe8 16.Qe8 Rce8 17.c4=) 15...Nd5 16.Qd2 c5 (better is 16...b5!?=+) 17.dc5 bc5 18.bc5?? (better is 18.c4 Nb6 19.Qc3=+) 18...Bc5-+ (18...Rc5?! 19.Qd4 Nf6 20.Qa4=+) 19.Qf2 (19.Qe2 Ne3 20.Kh1 Nf1 21.Qf1 Qd2-+) 19...Qb6 (better is 19...Be3 20.Rd1 Bf2 21.Rf2 Qh4-+) 20.Bd4 Rc7 (better is 20...Ne3 21.Bc5 Qc5-+) 21.Rd1 Rd8 (21...Bd4 22.ed4 Rc3-+) 22.Qg3? (22.f5 e5 23.Bc5 Qc5-/+) 22...f6 (22...Bd4 23.Rd4 Rc3 24.Re4 Re3 25.Re3 Ne3 26.Nd3-+) 23.Qf2? (23.Bc5 Qc5 24.Rd4 A) 24...Qa3 25.c4+/– (25.Re4? Nc3 26.Qf3 Ne4 27.Qe4 Qa2-+); B) 24...Rcd7-/+) 23...Rdd7 (23...Bd4 24.Rd4 Rc3 25.Qd2 Re3 26.Kh1 Ra3 27.Qd1-+) 24.a4? (24.Bc5 Qc5 25.c4 Nb6-/+ (25...Ne3 26.Rd7 Rd7 27.Nc2+/–)) 24...a5 (better is 24...Ne3 25.Bc5 Qc5 26.Rd7 Rd7-+) 25.Qd2?? (25.Kh1 Nc3!? (25...Ne3?! 26.Qe3 Bd4 27.Qe4=) 26.Bc5 Qc5-+) 25...Qb4 (25...Ne3 26.c3 Nd1 27.Qd1 Bd4 28.cd4 Rd4-+) 26.Qe2 (26.Qb4 Bb4 27.Rb1 Rc4-+) 26...Nc3 (26...Ne3 27.c3 Nd1 28.cb4 Bd4 29.Kh1-+) 27.Bc3 Qb6?? (better is 27...Qc3 28.Kh1 Qe3 29.Qe3 Be3 30.Rd7 Rd7-+) 28.Rd7+- Rd7 29.Bd2?? (better is 29.f5+-) 29...Bb4?? (better is 29...Rd2 30.Qc4 Be3 31.Kh1 f5-+) 30.Bb4 ½–½. coachwright – Hart2Hart, corr Tour D662, 2004.

5.b5 a5 6.a4 Bd6 7.e3 0-0 8.c4 Bb1 9.Rb1 Ne4?? (better is 9...Bb4 10.Ke2 Nbd7-/+) 10.c5+= Be7 11.Bd3 Nd7 12.Qc2 f5 13.g3 (13.0-0 Qc8+=) 13...Ndf6 (13...b6 14.cb6 Bb4 15.Kf1 cb6 16.Rc1=) 14.h3 b6 15.c6 Bb4 16.Ke2 h6 17.Ne5 Kh7 18.Rbg1+= g5? 19.f3 Nd6 20.g4+- Ng8? 21.Bc3 Ne7 22.Nd7 Bc3 23.Qc3 Ne8?? 24.h4 Rg8 25.hg5 Rg5 26.gf5 Nf5 27.f4 Rg1+/– 28.Rg1 Neg7 29.Qe1+- Qe7 30.Qg3 Qf7 31.Ne5 Qh5 32.Kd2 Rg8 33.Rg2 Kh8 34.Qf2 Ne8?? 35.Rh2 Qh2 36.Qh2 Neg7 37.Bf5 Nf5+- 38.Qh5 Kh7 39.Qf7 Rg7 40.Qe6 Ng3 41.Qd5 Nf1 42.Kd3 h5 43.Qd7! h4 44.Qh3 Kg8 45.Qf1 Rg3 46.f5 h3 47.f6 h2 48.Qh1 Rh3 49.Qd5 Kh7 50.Qf7 Kh8 51.Qg7 1–0. Baer,Cy (1895) – Tortoza,Carlos, CiF, 2007.

5.b5 Nbd7 6.e3 -/+.

5.c3 Bd6-/+ 6.e3 0-0 (6...Nbd7 7.Be2=+) 7.Bd3 Bd3 8.Qd3 Nbd7 9.a4 (9.0-0 c6=+) 9...b6 (9...a5 10.b5=+) 10.0-0 c5 11.bc5 (11.Ba3 Qe7=+) 11...bc5 12.c4 cd4 (12...Rb8 13.Ba3=+) 13.Bd4 (13.Qd4!? e5 14.Qh4=+) 13...e5 14.Ne5? (better is 14.c5 Bc7 15.c6 ed4 16.cd7 de3 17.fe3 Qd7 18.Nc3-/+) 14...Ne5-+ 15.Be5 Be5 16.Ra3 dc4 17.Qc4 Rc8 18.Qa6 Qe7 19.Rd3 h6 20.Nd2 Rfd8 21.Rd8 Rd8 22.Nf3 Bc7 23.Kh1 Bb6 24.a5 Bc5 25.Rc1 Ne4 26.Kg1 Nf2! 27.Kf2 Qe3 28.Kg3 Qc1 29.Qb5 Bd6 30.Kh3 Qe3 31.Qf5 Qe6 32.g4 Qf5 33.gf5 Bb4 34.Ne5 Ba5 35.Nc6 Rd5 36.Na7?? Rf5 37.Kg4 Rg5 38.Kh4 f5 39.Nc6-+ f4 40.Nd4 Be1 41.Kh3 Rh5 42.Kg4 Rh4 43.Kf3 g5 44.Nf5 Rh2 45.Ke4 h5 46.Kf3 Rh3 47.Ke4 f3 48.Nd4 f2 49.Ne2 f1Q 50.Nd4 Qc4 51.Ke5 Re3 52.Kf6 (52...Qd4 53.Kg5 Re5 54.Kg6 Qd6; 52.Kf5 Qd4 53.Kg5 Re5 54.Kg6 Qd6). M8IN3 – wpk05, Live Game Caissa's Web, 2005.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Bf5 7.Bf6 gf6 8.c3 e5 9.Ne2 Nd7 10.Ng3 Be6 (10...Bg6 11.Be2=) 11.Qh5 c5 (11...c6 12.Bd3=) 12.bc5 Bc5 13.Be2 e4 (13...Qb6 14.0-0+=) 14.0-0 Ne5 (14...Qc7 15.c4 dc4 16.Ne4+-) 15.h3 (15.c4 dc4 16.Ne4 Be7+-) 15...Qd7 (15...Qc7 16.Qh6+=) 16.Qh6 Ke7? (16...Ng6 17.Nh5 Kd8 18.Nf6=) 17.Nh5 (better 17.c4!?+-) 17...Ng6+= 18.Qg7 (18.d4 ed3 19.Bd3 Rg8+=) 18...f5 19.d4 Bb6? (19...ed3!? 20.Bd3 Bd6+=) 20.Nd2 (20.c4 dc4 21.Nc3 Ra8+-) 20...Qc8? (20...Rc8 21.Qf6 Kf8 22.Rb1+-) 21.c4! Qf8?? (21...dc4 22.d5 Passed pawn) 22.Qf6 Ke8 (22...Kd6 23.c5 Kc6 24.cb6 Qe7+-) 23.cd5 Bd8 (23...Qe7 24.de6 fe6+-) 24.Bb5 (24.de6? Bf6 25.Nf6 Ke7 26.Nd5 Ke6-+) 24...Bd7 25.Ng7 Qg7 26.Bd7 Kf8 27.Qd8 1–0. Pierre – GuestBombie, internet, 2020.

4.ba5 Nbd7 5.a6 (5.Nf3 e6=) 5...ba6=+ 6.d4 (6.Nf3 Rb8 7.Bf6 Nf6=+) 6...Rb8 7.Bc3 Ne4 8.Ba5 e5 9.Nf3 ed4 10.ed4 Bd6 11.Bd3 0-0 12.0-0 Re8 13.c4 dc4 14.Bc4 Nb6 15.Bd3 Bb7 16.Re1 Qf6 17.Qe2 Re7 18.Qc2 Rbe8 19.Nc3? (19.Nbd2 Nd2 20.Bd2 Bf3 21.Re7 Re7 22.gf3 Qd4 23.Rb1-+) 19...Nc3-+ 20.Bc3 (20.Re7 Qe7 (20...Re7?! 21.Qc3 Bf3 22.Bb6-/+; 20...Be7?! 21.Bc3 Bf3 22.gf3-/+) 21.Bh7 Kh8 22.Qc3 Kh7-+) 20...Bf3 21.Re7 (21.gf3 Qh4 22.Re5 f6 (22...Re5?! 23.de5 Qg5 24.Kh1 Be5 25.Re1-/+) 23.Bh7 Kh8 24.Re7 Re7-+) 21...Re7 (21...Be7?! 22.gf3 Bd6 23.Re1 Re1 24.Be1-/+) 22.gf3 (22.Bh7 Kh8 23.Bd3 Qg5-+) 22...Qf4 (22...Qf3?! 23.Rd1-+) 23.Bh7 Kh8 24.Be4 Qh2 25.Kf1 Qh3 (25...Nd5 26.Qb3 c6 27.Ke2-+) 26.Ke2 f5 27.Re1 0–1. market (1955) – Dubac (2200), GameColony.com, 2002.

4.b5 a4 5.c4 dc4 6.Bc4 Bd7 7.a3 e6 8.d4 c6 9.bc6 Bc6 10.Nf3 Nbd7 11.Nbd2 Nb6 12.Bd3 Bd6 13.Rc1 Rc8 14.0-0 Bb8 15.Qe2 Qd6 16.Ne5 Nfd7 17.f4 f6 18.Nec4 Qd5 19.Nb6 Nb6 20.Be4 Qd6 21.Bc6 Rc6 22.Ne4 Qe7 23.Rc6 bc6 24.Qa6 Qa7 25.Nc5 Qa6 26.Na6 Ke7 27.Nb4 Kd7 28.Rc1 Rc8 29.Nd3 Nd5 30.Nc5 Kd6 31.Bc3 Ba7 32.Bb4 Nb4 33.ab4 Rb8 34.Rc4 a3 35.Rc2 Rb4 36.Ra2 Bc5 37.dc5 Kc5 38.Ra3 Kc4 39.Kf2 Rb3 40.Ra2 Kd3 41.Kf3 e5 42.Ra5 Kc4 43.fe5 fe5 44.Re5 c5 45.Re7 Kd3 46.Rg7 c4 47.Rh7 c3 48.Rc7 c2 49.h4 Rc3 50.Rc3 Kc3 51.h5 c1Q 52.h6 Qd1 53.Kf4 Qh5 0-1. James_Flynn (2075) - blindchess32 (2240), Rated Bullet game, lichess.org.

4.b5 b6 5.a4 Bd7 6.d3 (6.Nf3 e6=) 6...e6 7.Nd2 g6 (7...c6!? 8.c4 Bd6=) 8.Ngf3 Bg7 9.Be2 c6 10.c4 dc4 11.dc4 cb5 (11...0-0 12.Be5+=) 12.cb5+- 0-0 13.0-0 Qe7 (13...Bc8 14.Nc4 Nd5 15.Bg7 Kg7 16.Qd4 f6 17.e4+-) 14.Qb3 (14.Ba3 Qd8 15.Bf8 Qf8+-) 14...Qe8 (14...Qb4!?+-) 15.Rac1 (15.Ba3 Nd5 16.Rac1 Nb4+-) 15...Kh8 (15...Qd8 16.Rfd1+-) 16.Ne5 Nd5 17.Ndf3 (17.Bf3 Ra7+-) 17...Bc8 18.Rfd1 Nd7 19.Nc6 (19.Nd7 Bd7 20.Bc4 Nf6+-) 19...Nb4 (better 19...Nc5!? 20.Bg7 Kg7+-) 20.Bg7+- Kg7 21.Qb2 f6 22.Bc4 (22.Nb4!? ab4 23.Qb4 Ra7+-) 22...Nc5 23.Rd6 (23.Rd8 Qf7 24.Ng5 A) 24...Na4?? A1) 25.Nf7 Nb2 26.Nd6 Rd8 (26...Nc4 27.Nc4 Rd8 28.Nd8-/+) 27.Nd8 Kf8-/+; A2) 25.Qa1 Nc6 26.Nf7 (26.Qa4?! fg5 27.Rf8 Kf8 28.bc6 Qc7=; 26.bc6?! Qe7 27.Rc8 Nc5 28.Rf8 Rf8+-) 26...Nd8 27.Nd8 (27.Qa4?! Nf7 28.Be2 e5+-) 27...Rd8 28.Qa4+-; B) 24...Qg8+-) 23...Na4 (23...Bd7 24.Nb4 ab4 25.Qb4 (25.Rb6? Na4 26.Qd4 e5-+) 25...Ra4 26.Qb2+-) 24.Qa1 Nc6 25.Rc6 (25.bc6?! Qe7 26.Rcd1 Nc5=) 25...Nc5 26.Ng5 (26.Rb6!? Bd7 27.Qa3+-) 26...Bd7 (better 26...h6 27.Nf3 Rb8=) 27.Rc7?? (better 27.Rb6 Qe7 28.Nf3+=) 27...h6-/+ 28.Nf3 (28.Rc5 bc5 29.Ne4-/+) 28...e5 (better 28...Qd8 29.Rc5 bc5-+) 29.Bd5 Rb8 30.R1c5 (30.Qb1 Rc8 31.Ra7 Rd8=+) 30...bc5 31.Rc5? (better 31.Qa5!? Rc8 32.Ra7-/+) 31...Rb5 (31...Qe7 32.Qc3-+) 32.Rb5 Bb5 33.Qa5 Bc6 (33...Qd7 34.e4-+) 34.Bc6 (34.Qc7 Bd7 35.h3 Qe7-+) 34...Qc6 35.h3 Rc8 36.Kh2 (36.Qb4 Qc7-+) 36...Qc7 37.Qd5? (37.Qc7 Rc7 38.g4-+) 37…e4 (37...e4 38.g3 ef3 39.Qf3 Qd7-+) 0–1. e4_e5_f4 (1705) – Lesy (1705), lichess.org, 2021.

4.Nf3 ab4 5.a3 b3 6.cb3 c5 7.b4 cb4 8.Bb5 Bd7 9.Bd7 Nbd7 10.ab4 e6 11.Ra8 Qa8 12.0-0 Bb4 13.Qb3 Be7 14.Ne5 Ne5 15.Be5 0-0 16.Nc3 Nd7 17.Bg3 Rd8 18.Nb5 Nc5 19.Qb2 Na4 20.Qd4 Bf6 21.Qg4 Kf8 22.Bd6 Be7 23.Be7 Ke7 24.Nd4 Kf8 25.Qh4 Kg8 26.Ra1 b5 27.Nb5 Rb8 28.Nc3 Nc3 29.Rf1 Ne2 30.Kh1 Nd4 31.Qh7 Kh7 32.h3 Kg8 33.ed4 Rb1 34.Re1 Re1 35.Kh2 Qa5 36.Kg3 1-0. CaissaSoeze (2345) - rondep (2325), Rated Bullet tournament, lichess.org. (=1.e3 Nf6 2.b4 d5 3.Bb2 a5)

4.Bf6 gf6 5.c3 Bg7 6.ba5 c5 7.h3 Qa5 8.Qb3 c4 9.Qb4 (9.Qc2!?+=) 9...Qb4-/+ 10.cb4 f5 11.Nc3 Nc6 (11...Na6 12.Rb1 Nc7 13.Nge2-/+) 12.Rb1 (better is 12.Nd5!? Ba1 13.Nc7 Kd8 14.Na8+=) 12...Bc3-/+ 13.dc3 Ra2 14.Rc1 e5 15.Nf3 b5 16.Be2 Rg8 17.g3 f6 18.Bd1 Kf7 19.0-0 (better is 19.Rc2 Ra1 20.Kd2-+) 19...f4 20.ef4 Bh3 21.Re1 ef4 22.Kh2 Bf5 23.Re2 fg3 24.fg3 Ra7 25.Nh4 Bg4 26.Rf2 Bd1 27.Rd1 Ne7 (27...Ne5 28.Kh3 Nd3 29.Rf3-+) 28.Kh3 Ra3 29.Rc1 (29.Rf3-+) 29...d4! 30.Nf5 (30.cd4 Rd3 Double attack (30...Rag3 Pinning; 30...Rag3 Deflection; 30...Rd3 Decoy)) 30...Nf5 31.Rf5 Rc3 (31...dc3?! 32.Rb5 c2 33.Rb7 Ke6 34.Rc2 Rgg3 35.Kh2 Rh3 36.Kg1 Rag3 37.Kf2-+) 32.Rcf1 (32.Rc3 dc3 33.Rf3-+) 32...Rgg3 (better is 32...Rcg3!? 33.Kh2 Rg2 34.Kh1-+) 33.Kh2 Rh3 34.Kg2 Rcg3 35.Kf2 Ke6 36.Rb5 Rf3 37.Ke1 Rf1 38.Kf1 Rb3 (better is 38...Rh1 39.Kg2 d3 40.Rb6 Ke5 41.Rb5 Ke4 42.Rb6-+) 39.Ke2 f5 40.Kf2 (40.Rb8 d3 41.Kd2 f4 42.Re8 Kd5-+) 40...c3 41.Ke2 (41.Rc5-+) 41...c2 42.Kd2 d3 (42...Rc3 43.Kc1 d3 44.Rb6 Ke5 45.Rb5 Ke4 46.Ra5 d2 47.Kb2 c1Q 48.Ka2 Qc2 49.Ka1 d1Q) 43.Rc5 Rb1 44.b5 (44.Kd3 c1Q 45.Rc1 Rc1-+) 44...Rd1 45.Ke3 c1Q (45...f4 46.Kf4 Re1 47.Rc6 Kd7 48.Kf5-+) 46.Rc1 Rc1 47.Kd3 Rc5 48.b6 Rb5 (48...Rb5 49.Ke3 Rb6-+) 0–1. Bandy 1 – the horror man, ChessWorld.net, 2014.

5.a4 Bf5 6.c4 e6 7.Nf3 Nbd7 8.d4 cd4 9.Bd4 Bb4 10.Nbd2 dc4 (10...Ne4 11.Ra2-/+) 11.Bc4 Rc8 (better 11...Bg4 12.Be2 Bf3 13.gf3 e5=+) 12.Qe2 (better 12.0-0=) 12...Ne4-+ 13.0-0 (13.Rd1 e5! 14.0-0 Nd2 15.Nd2 ed4 16.ed4 Qe7-+) 13...Nd2 (13...Bd2 14.Rfd1 Bc3 15.Rac1 Bd4 16.Nd4-+) 14.Nd2 Bd2 15.Bg7 (better 15.Rad1 Bb4 16.e4-+) 15...Rg8 16.Qd2 (16.Rfd1 Be3 17.Qe3 Rc4-+) 16...Rg7 (16...Rc4 17.Bc3 Bh3 18.g3 Bf1 19.Kf1-+) 17.Be2 (17.Qb2 Qg5 (17...Rc4?! 18.Qg7 Qh4 19.f4=+) 18.f4 Qf6 19.Qf6 Nf6-+) 17...Ne5 (better 17...Bh3 18.g3 Bf1 19.Rf1 Nc5-+) 18.Qb2?? (18.Qd8 Rd8 19.Rfd1-+) 18...Qd5 19.f3 (19.g3 Rc2 20.Qc2 Bc2-+) 19...Rc2 20.Qc2 Bc2 21.Rf2 (21.g3 Qd2 22.Rf2 Qe3-+) 21...Nd3 22.Bd3 Qd3 23.e4 (23.g3 Ba4! 24.b6 Bb5-+) 23...Qd4 24.Ra2 Ba4 25.Rad2 (25.h4 b6 26.Rab2 f6-+) 25...Qc5 (25...Qa1 26.Rf1 Qc3 27.Rdf2-+) 26.g3 Bb5 27.Kg2 Bc6 (27...Bc4 28.Rd1-+) 28.Rd3 (28.Rc2 Qe5-+) 28...Ke7 29.Rfd2 (29.Rdd2 a4-+) 29...Rg8 30.Rd4 (30.Rb3 Rd8 31.Rf2 a4-+) 30...a4 31.R4d3 a3 32.Ra2 Ra8 33.Rb3 Qc4 (better 33...f5 34.e5-+) 34.Rba3 Qa2 35.Ra2 Ra2 36.Kh3 b5 37.Kg4 Rh2 38.e5 b4 39.f4 (39.Kg5 b3 40.Kg4 b2 41.Kg5 b1Q 42.g4 Qc1 43.f4 h6) 39...b3 (39...f5 40.ef6 Kf7 41.f5 e5 42.Kg5 Bf3 43.g4 h6) 40.Kg5 (40.f5 ef5 41.Kf4 b2 42.Kf5 b1Q 43.Kg5 h6 44.Kf4 Qe4) 40...Bf3 (40...b2 41.f5 b1Q 42.f6 Kd7 43.Kf4 Qe4 44.Kg5 h6) 41.f5 ef5 (41...b2 42.Kf4 b1Q 43.f6 Kd7 44.Kf3 Qd3 45.Kf4 Qd4 46.Kg5 h6) 42.Kf5 (42.Kf4 b2 43.Ke3 b1Q 44.Kd4 Qb4 45.Kd3 Be4 46.Ke3 Qd2) 42...b2 43.Kf4 b1Q 44.Kf3 Qd3 45.Kg4 (45.Kf4 Rf2 46.Kg4 Qf5 47.Kh4 Rh2) 45...Rf2 (45...Qe4 46.Kg5 h6) 46.e6 (46.Kh4 Qe4 47.Kh3 h5 48.e6 Qg4) 46…Qg6 (46...Qg6 47.Kh4 Rh2; 46...Qf5 47.Kh4 Rh2) 0-1. zembelek (2115) - Skakalkina (2205), Rated Blitz game, lichess.org, 2014.

5.c4 e6 6.Nf3 b6 7.cd5 Nd5 (7...ed5 8.Be2=) 8.Be2 Bb7 9.0-0 Nd7 10.Nc3 Nc3 11.dc3 Be7 (11...Qc7 12.Qa4=) 12.c4 0-0 13.Qc2 Bf6 14.Rad1 Qe7 15.Bf6 (15.Rd2 Bb2 16.Qb2 Rad8=) 15...Nf6= 16.Ne5 Rad8 17.Bf3 (17.f3 Qc7 18.Qc3 Rd1 19.Rd1 Rd8=) 17...Bf3 18.gf3 Rd1 19.Rd1 Nh5 (19...Rd8!?=) 20.f4 Qh4 21.Qe2 Nf6 22.Qf3 h5 (22...h6 23.Rd6 Rb8 24.Rc6+/-) 23.Rd6 (23.h3 a4+/-) 23...Rb8 24.Nd7 (24.h3 a4 25.Rb6+-) 24...Nd7= 25.Rd7 Qg4 (better 25...Rd8!? 26.Rb7 Rd6=) 26.Qg4+/- hg4 27.f3 (27.Kg2 Kf8+/-) 27...gf3+= 28.Kf2 Kf8 29.Kf3 Ke8 30.Ra7 Rd8 31.Rb7 Rd6 (31...Rd2 32.Rb6 Ra2 33.Rc6+/-) 32.a4 (32.Ke4+/-) 32...f5? (32...Kf8 33.h4+=) 33.h4 (better 33.Rg7!? Kf8 34.Rb7+-) 33...Kf8 34.h5 Kg8 35.Kg3 Rd3 (35...Kh7 36.Kh4 Kh6 37.Rf7+=) 36.Rb6 (36.Kf2 Rd2 37.Ke1 Rc2 38.Rb6 Rc4 39.Re6 Ra4+/-) 36...Re3+= 37.Kh4 Re4 38.Kg5 Rc4 39.Kg6 (39.Re6 Ra4 40.Rc6 Rb4 41.Rc5 Rb1+-) 39...Kf8 40.Rb8 Ke7 41.Kg7 (better 41.b6!? Kd7 42.Kg7 Rf4 43.h6 Ra4 44.h7 Rg4 45.Kf6+-) 41...Rf4=+ (41...Ra4 42.h6 Rf4 43.h7 Rg4 44.Kh6+-) 42.Rb7 Ke8?? (42...Kd6 43.h6 Rg4 44.Kf6 Ra4+=) 43.h6 Rg4 (better 43...Ra4 44.Ra7 Rh4+-) 44.Kf6 Rh4 (44...Ra4 45.Ke6 Kd8 46.h7+-) 45.h7 (45.Ke6?! Rh6 46.Kf5 Kd8+/-) 45...f4 46.h8R! Rh8 47.Rb8 Kd7 48.Rh8 Kd6 49.Rd8 Kc7 50.Rd2 1-0. carlos78 (2160) - konakjan (2185), Rated Blitz game, lichess.org, 2015.

5.bc6 b6 6.Bb5+/- Qc7 7.Nf3 Nc6 8.Be5 Qd7 (8...Qb7 9.Bf6 gf6 10.Nc3+=) 9.Nd4 Bb7 10.Qe2 (10.Nc3 Rc8+/-) 10...e6 (10...Ne4 11.d3 Nd6 12.Bc6 Bc6 13.Nd2+=) 11.0-0 (11.Nc3 Bd6 12.f4 0-0+=) 11...Bc5 (11...Ne4 12.d3 Nd6 13.Bc6 Bc6 14.Qg4=) 12.Nc6 (12.Nc3 0-0+/-) 12...Bc6+= 13.Bc6 (13.Nc3 Bd6 14.Bf6 gf6+=) 13...Qc6= 14.d4 Bd6 15.Bd6 Qd6 16.c4 dc4 17.Qc4 0-0 18.Nd2 Rfc8 19.Qb5 Qc6 20.Qg5 (20.Qc6 Rc6 21.Rfc1 Rac8 22.Rc6 Rc6=+) 20...h6 (20...Qa4 21.Nf3=+) 21.Qg3 Ne4 (21...Qd5 22.a4=) 22.Ne4= Qe4 23.h3 Rc2 24.Qd6 Rb2 25.Rac1 (25.Qa3 Qc2=) 25...b5 (25...Ra2 26.Qb6 a4 27.Ra1=+) 26.Qd7 (26.Qa3 Rd2=) 26...b4 27.Rc7 Rf8 28.Qa4 Rb1 (28...e5!? 29.de5 Qd5=) 29.Qa5+= Rf1 30.Kf1 Qb1 31.Ke2 Qg1 (31...Qe4 32.Qb4 Qg2 33.Qc5 Qh3 34.Rc8 Qg4 35.Kd2 Rc8 36.Qc8 Kh7 37.a4+=) 32.g3 (32.Kf3 Qd1 33.Kg3 Qe2+/-) 32...Qh1 33.Qb4 Qh3 34.a4 (34.Qb5 Qg4 35.Ke1 Qh3+/-) 34...Qg4 (better 34...Qh5!? 35.f3 Qh2 36.Kd3 Qg3=) 35.Ke1+/- Qf3 (better 35...e5+/-) 36.a5?? (36.Qb7 Qb7 37.Rb7 Ra8+-) 36...g5?? (36...Qh1!? 37.Ke2 Qh5 38.f3 Qh2 39.Kd3 Qg3=) 37.a6 (better 37.Qb7 Qb7 38.Rb7+-) 37...h5?? (better 37...Qh1 38.Ke2 Qh5 39.f3 Qh2 40.Kd3 Qg1+=) 38.Qb7 (better 38.Qf8! Kf8 39.Rc8 Kg7+-) 38...h4 (38...Qd5 39.a7 Qa5 40.Ke2 Kg7+-) 39.Qf3 (39.Qf3 hg3 40.a7 g2 41.a8Q g1Q 42.Kd2 Qe1 43.Ke1 f5 44.Qh1 Ra8 45.Qa8) 1-0. cipiripi (2285) - konakjan (2210), Rated Blitz game, lichess.org, 2015.

5.bc6 bc6 6.Nf3 e6 7.c4 Be7 8.Be2 0-0 9.0-0 Ba6 10.cd5 Be2 11.Qe2 cd5 12.Nc3 Nc6 13.Nb5 Ne4 14.d3 Nd6 15.Nd6 Qd6 16.Rac1 Rfb8 (16...Rfc8 17.Rc3=) 17.Ba1 (17.Rc2 Rb6=) 17...Bf6 (17...e5!?=) 18.Bf6+= gf6 19.Nh4 Ne5 20.f4 Ng6 21.Qh5 f5 22.Nf3 f6 23.g4 (23.Nd4!? Rc8 24.Qf3+=) 23...fg4= 24.Qg4 Kh8 25.Kh1 Rg8 26.Qh3 Ra7 27.Rc2 Re7 28.Nd4 Qa6 29.f5 Ne5 30.Ne6?? (better 30.fe6 Qd3 31.Qf5 (31.Rf6?? Qe4 32.Nf3 Reg7-+) 31...Qf5 32.Rf5+=) 30...Qd3-+ 31.Rcf2 Qe4 32.Rg2 Rg2?? (better 32...Nc4 33.Rfg1 Ne3-+) 33.Qg2= Qf5?? (better 33...Rb7 34.Qe4 de4=) 34.Rf5+- (34.Rf5 Re6 35.Qd5+-) 1-0. carlos78 (2255) - konakjan (2150), Rated Blitz game, lichess.org, 2015.

5.bc6 Nc6 6.Nf3 e6 7.d4 Bd6 8.Bd3 (8.c4 dc4 9.Bc4 0-0=) 8...0-0 9.a3 b6 10.Qe2 Ba6?? (better 10...Bb7=) 11.Ba6+- 1-0. cipiripi (2280) - konakjan (2215), Rated Blitz game, lichess.org, 2015.

5.Nf3 Nbd7 6.c4 e6 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5 4.e3 e6 5.c4 Nf6 6.Nf3 Nbd7).

5.Nf3 Bf5 6.c4 e6 7.a4 Nbd7 8.d3 Qc7 9.Be2 (9.Nh4 Bg6=) 9...Bd6 (9...dc4 10.dc4 Rd8 11.Nbd2+=) 10.Nbd2= h6 11.h3 Ke7 (11...Rd8 12.cd5 ed5 13.Rc1=) 12.Qb3 (12.Rc1 Rhd8+=) 12...Rhd8 13.0-0-0 (13.cd5 ed5 14.Rc1 Kf8=) 13...Ne5 (13...Bg6 14.Rhg1=) 14.g4 White launches an attack 14...Bg6 15.Nh4 Bh7 16.f4 dc4 17.dc4 Ng6 (17...Ned7 18.Bf3+=) 18.Nhf3 White plans g5 18...Kf8 19.g5 hg5 (19...Ng8 20.Rhg1 Be7 21.Qc3+/–) 20.Ng5+- (20.fg5?! Nd7+=) 20...Bg8 21.h4 Nh7 22.h5 Ne7 23.Rhg1 (23.b6 Qb8+-) 23...e5 (23...Ng5 24.Rg5 f6 25.b6+-) 24.Nde4 f6 25.Nd6 Rd6 26.Rd6 Qd6 27.Rd1 Qc7 28.Nh7 Bh7 29.fe5 fe5 30.Rf1 Kg8 31.Qc3 Re8 32.Bg4 Nc8 33.Qd2 Kh8 34.Rd1?? Bg8? 35.h6+- Nb6? 36.hg7 Kg7 37.Qa5 Re7? 38.Rg1 Kf8+/– 39.Rf1 Ke8?? 40.Bh5 Kd7? 41.Qd2 Qd6 42.Bg4?? Kc7+/– 43.Qd6 Kd6 44.Rf6 Kc7 45.a5 Nc4 46.b6 Kd8 47.Rf8 Re8 48.Re8 Ke8 49.a6 Bd5 50.Be6! Nb6 51.Bd5 ba6 52.Bc6 Ke7 53.Be5 Nc4 54.Bf4 Ke6 55.e4 Nd6 56.Bd5 Kd7 ½–½. De Visser,Arno – Mossing Holsteijn, 1993.

5.Nf3 Bg4 6.Be2 e6 7.0-0 Bd6 8.h3 Bh5 9.d3 0-0 10.Nbd2 e5 (better is 10...Nbd7!?=) 11.Ne5+/– Be2 12.Qe2 Be5 13.Be5 Nbd7 14.Bb2 Qb6 15.a4 Qe6 16.Rae1 Rae8 17.Qd1 b6 18.c4 Qf5 19.e4! de4 20.Ne4 Ne4 21.de4 Qe6 22.Qd5 Nf6 23.Qg5 h6 24.Qg3 Nh5 25.Qh4 Nf6 (25...Qg6 26.Re3+/–) 26.Bf6+- Qf6 27.Qf6 gf6 28.f3 Rd8 29.Rd1 Rd4 30.Rd4 cd4 31.Rd1 Rd8 32.g4 Kg7 33.Kf2 Kg6 34.h4 h5 35.Kg3 (35.Rc1 hg4 36.fg4 Rh8+-) 35...Kh6 36.Kf4 Kg6 (36...Kg7 37.Rd3+-) 37.Rd3 Rd7 38.gh5 (better is 38.e5!? Rd8+-) 38...Kh5 39.e5 Kh4 40.ef6 Rd6 (40...Rd8!?+-) 41.Ke5 Rd7?? (41...Re6 42.Kd4 Rd6 43.Ke4 Rf6+-) 42.Rd4 Rd4 43.Kd4 Kg5 1–0. zabazaba (1655) – teddyblueabbott, gameknot.com, 2015.

6.ed4 cd4 7.Nf3 Bg4 8.Bd3 e5 9.0-0 Nbd7 10.h3 Bh5 11.Re1 (11.Qe2 Bd6 12.Bf5 0-0=+) 11...Bd6= 12.g4 (12.Be2 Bg6=) 12...Bg6=+ 13.Bg6 hg6 (worse 13...fg6 14.Nd4 Nc5 15.d3+=) 14.Kg2 (14.Ne5 Be5 15.Bd4-/+) 14...0-0-/+ 15.d3 Re8 16.Ba3 Ba3 17.Na3 Nc5 (17...Qc7 18.Ng5-/+) 18.Re5 (18.Ne5 Qd6 19.f4=+) 18...Qd6 (better 18...Re5!? 19.Ne5 Qd6=+) 19.Re8= Re8 20.b6 Qf4 (20...Ne6!? 21.Nb5 Nf4 22.Kh2 Qc6=) 21.Nb5+= Ng4 22.hg4 Qg4 23.Kh2 Qf4 (better 23...Kh7 24.Ng1 Qf5+-) 24.Kg2 Ne6?? (better 24...Qg4 25.Kh1 Qh5 26.Nh2 Re2+=) 25.Qh1+- Qg4 (25...Qf5 26.Rd1 Re7 27.Qh2 Nf4 28.Kf1+-) 26.Kf1 Nf4 (26...Qf5 27.Rd1 Rd8 28.Ng1+-) 27.Nfd4 Nd3 (27...Rd8 28.Rb1+- (28.Qb7?! Qh3 29.Kg1 Qg4 30.Kh2 Qh3 31.Kg1 Qg4 32.Kh2 Qh3 33.Kg1=)) 28.Qb7 Re5?? (28...Ne1 29.Qh1 Nc2+-) 29.Qa8 Kh7 30.Qf3 Qh4 31.Rd1 (31.b7 Re8 32.Nc6 Nf2+-) 31...Nf4 (31...Nf2 32.Qf2 Qh5+-) 32.b7 Rh5 (32...Re8 33.Nd6 Rb8 34.Nc6 Rb7 35.Nb7+-) 33.Ne2 Ne2 34.b8Q (34.Ke2 Qc4 35.Qd3 Qe6 36.Kf1 Qg4=) 34...Qc4 35.Qe2 Rh1 36.Kg2 Qe2 37.Rh1 (37.Rh1 Qh5 38.Rh5 gh5 39.Qe8 Kg6 40.Nd6 Kh6 41.Nf7 Kh7 42.Qe6 g6 43.Ne5 Kh8 44.Qg6 h4 45.Nf7; 37.Kh1?! Qd1 38.Kh2 Qh5 39.Kg3 Qg5 40.Kf3 Qd5 41.Ke3 Qa2 42.Qh2 Kg8=) 1–0. guest737 – guest33, chessclub.com, 2019.

6.ed4 cd4 7.Nf3 Bg4 8.h3!? Bf3 9.gf3 Qb6=+.

6.ed4 cd4 7.Nf3 Bg4 8.h3 Bf3 9.gf3 Qd6=+.

6.ed4 cd4 7.Nf3 Bg4 8.h3!? Bf3 9.Qf3+=.

6.ed4 cd4 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 e5 10.Qb7+=.

6.ed4 cd4 7.Nf3 Bg4 8.h3 Bh5 9.g4 Bg6 10.Bd4 Be4? (better 10...Nbd7 11.Qe2 e6+-) 11.Nc3+- e6 12.Bf6 gf6?? (12...Bf3 13.Qf3 gf6 14.Qb7 Nd7+-) 13.Ne4 f5 (13...Nd7 14.Rg1+-) 14.gf5 ef5 15.Ng3 Bc5 (15...Qe7 16.Qe2 f4 17.Nf5 Qe2 18.Ke2+-) 16.Qe2 (16.Qe2 Kf8 17.0-0-0+-) 1–0. DEFFM – GuestRJNY, freechess.org, 2019.

(--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6).

5.a4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

5.Nf3 (---> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

5.d4 c6 6.a4 e6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Re8 10.Nbd2 e5 11.de5 Ne5 12.c4 Bf5 (12...Nc4 13.Bc4 dc4 14.Nc4=) 13.cd5 (13.Be5 Be5 14.Ne5 Re5+=) 13...Nd5= 14.e4 Nf3 (14...Nf4 15.ef5 Ne2 16.Qe2=) 15.Bf3 Qh4 16.g3 Qh6 (16...Qg5 17.ed5 Rad8 18.h4+-) 17.ef5 (worse 17.ed5 cb5 18.Nb3 ba4 19.Ra4 Bb4+-) 1–0. onur604 (2320) – KWWUMN (2095), lichess.org, 2020.

5.Nf3 e6 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3 Nbd7).

5.f4 e6 6.Nf3 Be7 7.Be2 0-0 8.0-0 c6 9.a4 c5 10.Nc3 b6 11.Bd3 Bb7 12.Qe1 Bd6 13.Qg3 Qc7 14.Nd1 Rfe8 15.Ne5 Be5 16.fe5 (16.Be5 Qd8+=) 16...Ne4 (16...c4 17.Qh4 Ne5 18.Qg3+-) 17.Be4+= de4 18.Nf2 Rad8 19.Ng4 Kh8?? (better 19...Re7+=) 20.Rf7+- (20.Rf7 Rf8 21.Nh6 Rf7 22.Nf7 Kg8 23.Nd8 Qd8 24.c4+-) 1–0. FeegLood (2620) – bitwizardry (2305), lichess.org, 2015.

4.a3 Nc6 5.Nf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.d3 e6 9.Be2 Bd6 (9...h6!?=) 10.g5+= Nd7 11.Bg7 Rg8 12.Bb2 e5 13.h4 e4 14.de4 de4 15.h5 (better 15.Nfd2+-) 15...ef3=+ 16.hg6 fe2 17.gf7 Kf7 18.Qd5 Ke8?? (18...Kf8 19.Qf5 Ke8 20.Rh7 Nde5 21.Qe6 Kf8 22.Be5 Ne5+-) 19.Qg8+- (19.Qg8 Nf8 20.Rh7+-) 1–0. FeegLood (2560) – ChickenBrad (1725), lichess.org, 2015.

4.a3 Bf5 5.Be2 Nc6 (5...e6 6.Nf3=) 6.Nf3 Be4 (6...Qd6 7.d4=) 7.d3+= Bf3 (7...Bg6 8.Nbd2+=) 8.Bf3 e5 (8...e6 9.c4+=) 9.0-0 (9.c4+=) 9...Bd6 (9...Qd6 10.Nd2+=) 10.Nd2 (10.c4 Qd7 11.cd5 Ne7+/–) 10...0-0 (10...a5 11.c4+/–) 11.c4 Ne7? (better is 11...Re8+/–) 12.c5+- e4? (12...c6 13.cd6 Qd6+-) 13.cd6 (13.de4 Bh2 14.Kh2 de4 15.Ne4 Ne4 16.Be4 c6+-) 13...Qd6 (13...ef3 14.de7 Qe7 15.Qf3+-) 14.de4 de4 (14...Qe6 15.Bf6 Qf6 16.ed5+-) 15.Ne4 (15...Ne4 16.Be4+-) 1–0. mic (2225) – kkoushik (2115), net–chess.com, 2007.

4.a3 Bg4 5.Be2 Be2 6.Ne2 e6 =.

4.a4 c5 5.b5 (5.bc5!? Qa5 6.Nf3+=) 5...Bf5=+ 6.c4 (6.Ne2 c4=) 6...dc4 (6...ab5 7.cd5 b4 8.Bb5 Bd7 9.Bc4=) 7.Bc4= e6 8.Nc3 (8.Nf3 Bd6=) 8...Be7 9.Nf3 0-0 10.0-0 Bd3 11.Bd3 Qd3 12.Ne5 Qf5 13.f4 h5? (better 13...Nfd7!? 14.Qf3 Ne5 15.Qb7 Nbd7 16.fe5 Qd3+=) 14.Qf3+- Ra7?? (better 14...Nbd7 15.Qb7 Rfb8+-) 15.b6 Ra8 16.Qb7 Nc6 (16...Nbd7 17.Nd7 Nd7 18.Qd7 Bf6+-) 17.Nc6 Bd6 18.e4! Qg4 (18...Ne4 19.Ne7 Double attack) 19.e5 Be5 (19...h4 20.ef6 h3 21.g3+-) 20.fe5 Nh7 (20...Nd5 21.Nd5 ed5 22.Qc7+-) 21.h3 (21.Qc7 Rae8 22.b7 Ng5+-) 21...Qg5 (21...Qg3 22.Ne4 Qb3 23.Ne7 Kh8 24.Rf7 Rf7 25.Qa8 Rf8 26.Ng6 Kg8 27.Nf8 Nf8 28.Rf1 Qe3 29.de3 g5 30.Qf8 Kh7 31.Ng5 Kg6 32.Qf6) 22.Ne4 Qh4 23.Ne7 Kh8 24.Rf7! (24.Rf7 Rf7 25.Qa8 Rf8 26.Ng6 Kg8 27.Nf8 Nf8 28.Rf1+-) 1–0. onur604 (2320) – irenminsk (2200), lichess.org, 2020.

4.a4 Nbd7 5.c4 dc4 6.Bc4 e6 7.Qb3 c5 8.b5 ab5 9.Bb5 Be7 10.Nf3 0-0 11.0-0 b6 12.d3 Rb8 (12...Ba6 13.Nbd2=) 13.Na3 Bb7 14.e4 Ba8 (14...Ra8 15.Nc4+=) 15.Nc4+- Qc7 (15...Bb7 16.Qc3+-) 16.Nfe5 Rfd8 17.f4 Nf8 18.f5 (better 18.Bc3+-) 18...ef5? (better 18...Bd6+-) 19.Nf7!+- (worse 19.Rf5 Ng6+-) 19...h6 (19...Kf7 20.Ne5 Discovered attack) 20.Be5 Qc8 (20...Qa7 21.Nd8 Rd8 22.Ne3 c4 23.Qc4 Kh7+-) 21.Nd8 Qd8 22.Ne3 (22.Bb8 Qb8 23.Nb6 Kh7 24.Na8 Ng4+-) 22...Kh8 (22...Kh7 23.Qf7 Rb7 24.Nf5+-) 23.Nf5 Rc8 (23...c4 24.Qc3 Qd3 25.Qd3 cd3 26.Ne7 Rd8+-) 24.Qf7 Ne8 25.Bg7 Kh7 26.Be5 (26.Be5 Ng7 27.Qg7) 1–0. Pierre – Orampo, internet, 2020.

4.a4 e5 5.Be5 Bb4 6.c3 (6.Nf3 Nc6=+) 6...Nc6 (6...Be7 7.Bf6 Bf6 8.d4=+) 7.Bc7 (7.Bf6 Qf6 8.Qb3 Be7=+) 7...Qc7 8.cb4 Nb4 9.Nc3 (9.Na3 Bf5=+) 9...Bf5 (9...d4 10.Qb1 Qe7 11.Na2=+) 10.Rc1= Qa5 (10...d4 11.Ne4 (11.ed4? Qe7 12.Be2 Nd3 13.Kf1 Nc1 14.Qc1 0-0-+) 11...Qe7 12.Nf6 Qf6 13.Qb3=+) 11.Qb3 (11.Nf3=) 11...Nd3 (better 11...Rc8!?=+) 12.Bd3+= Bd3 13.Nd1 (better 13.Nf3!?+=) 13...Bc4 14.Qb7 0-0 15.Nc3 (15...d4!! Solare) 1–0. marekt – laura, gameknot.com, 2001.

4.a4 Bf5 5.Nf3 Nbd7 (5...e6 6.b5=+) 6.c4 (6.Nh4 Bg6=) 6...e6 7.Nd4 Bb4 (7...Bg4 8.f3 Bh5 9.c5=+) 8.cd5 (8.Nf5 ef5 9.Qf3 f4=) 8...Bb1=+ 9.de6 fe6?? (better 9...Bg6 10.ed7 Qd7=) 10.Ne6+- (10.Qb1?! Nc5=; 10.Rb1?! Qe7+=) 10...Qe7 (10...Qc8 11.Ng7 Kf7 12.Rb1 Bd2 13.Qd2 Kg7 14.Bc4+-) 11.Nc7 (11.Rb1?! Qe6 12.Bf6 Bd2 13.Qd2 Qf6+-) 11...Kd8 12.Na8 (12.Rb1 Kc7 13.Qb3 a5=+) 12...Be4 13.Rc1 (13.Bd4 Bc6 14.f3 Nd5+-) 13...Ba5 (13...Bc6 14.Bc3+-) 14.Bc3 (14.f3 Bc6 15.Bc3 Bc3 16.Rc3 Qe5+-) 14...Bc3 15.Rc3 (worse 15.dc3 Qc5 16.Qd4 Qa3+-) 15...Nd5 (15...Bc6 16.Rc1+-) 16.Rc4 Rf8 (16...b5 17.Rd4 Nb4 18.Nb6 Nc2 19.Qc2 Bc2 20.Rd7 (20.Nd7?! Qa3 21.f4 Ba4=) 20...Qd7 21.Nd7 Kd7 22.ab5 ab5 23.Bb5 Kd6 24.Ke2+-) 17.Qc1 Ke8 18.f3 (18.Nc7 Nc7 19.Rc7 Qd6+-) 18...Bg6 (18...Bf5 19.Rc8 Kf7 20.Rf8 Nf8 21.e4+-) 19.Nc7 (better 19.Rc8 Kf7 20.Rf8 Kf8 21.Qc8 Qe8 22.Qb7 Ne3 A) 23.de3?! Qe3 24.Be2 Qc1 25.Kf2 Qc5 26.Kf1 Qc1 27.Bd1 Qd1 28.Kf2 A1) worse 28...Qh1 29.Qd7 Qh2 30.Qd8 Kf7 31.Qd5 Ke7 32.Qb7 Kf8 33.Qb4 (33.Qa6?! Qh4 34.Ke2 Qe7 35.Kf1 Qd8=) 33...Ke8 34.Qc4+-; A2) 28...Qd2 29.Kg3 Qg5 30.Kh3 Qh5 31.Kg3 Qg5 32.Kh3 Qh5 33.Kg3 Qg5=; B) 23.Qb4 Kg8 24.de3 Qa8 25.Bc4 Bf7 26.Kf2+-) 19...Kf7 (19...Nc7 20.Rc7 Qh4 21.g3 Qb4+-) 20.Nd5 Qe6 (20...Qd6 21.Rc7 Rb8 22.Nb6 Qb6 23.Rd7 Kg8 24.a5+-) 21.Nf4 Qb6 22.Rc7 Bf5 (22...Qd6 23.Rb7 Bf5 24.Qc4 Ke7 25.Nd5 Kd8+-) 23.Qc4 Be6 24.Rd7 Kg8 25.Ne6 Re8 (25...Qe3 26.de3 Re8 27.Rg7 Kh8 28.Qd3 Re6 29.Qh7) 26.Rg7 (26.Rg7 Kh8 27.Qd3 Qe3 28.de3 Re6 29.Qh7) 1–0. Adlai – Ampere, corr, 2018.

4.a4 g6 5.b5 a5 6.c4 dc4 (6...Bg7 7.cd5 Qd5 8.Nc3=) 7.Bc4+= Bg7 (7...Nbd7 8.Qb3 e6 9.Nf3+=) 8.Nf3 0-0 9.0-0 Nbd7 (9...Bg4 10.d4+=) 10.d4 Nb6 11.Be2 (11.Bd3 Bg4+=) 11...Be6 (11...Bf5 12.Nc3+=) 12.Qc2 (12.Nbd2 Bf5+=) 12...Nbd5 (12...Bf5 13.Qc1=) 13.Ba3 (13.Nbd2 Rc8+=) 13...Re8 (13...Bf5 14.Qb3+=) 14.Nbd2 b6 (14...Rc8 15.Rac1+=) 15.h3 (15.Rac1 Ng4+-) 15...Qd7 (15...Nb4 16.Bb4 ab4 17.Bc4 Bc4 18.Nc4+-) 16.Ng5 (16.Ne5 Qd8+-) 16...Nb4 (16...h6 17.Ne6 Qe6 18.Bc4+-) 17.Bb4 ab4 18.Ne6 Qe6 19.Bf3 Rac8 (19...Ra7 20.Rfc1+-) 20.Bc6 Red8 21.Qb2 (21.Rab1 Nd5+-) 21...Nd5+- 22.Rfe1 Qd6 (22...Rd6 23.Bb7 Rb8 24.Bd5 Qd5 25.Rec1+-) 23.Ne4 (23.Nc4 Qf6+-) 23...Qe6 24.Ng5 Qd6 25.Qb3 e6 26.e4 (better 26.Ne4!? Qe7 27.Rac1+-) 26...Nf4 (26...Nc3 27.e5 Qd4 28.Nf3 Ne2 29.Kf1=+) 27.g3 (27.Nf3 Bd4 28.Rad1 Qc5 29.Nd4 Rd4=) 27...h6 (27...Bd4 A) 28.gf4? Qf4 (28...Ba1 29.Ra1 Qf4 30.Nf3+=) 29.Ra2 Qg5 30.Kh1 Qf4-+; B) 28.Rad1 Nh5 29.Kg2=) 28.Nf7 (28.Nf3 Nh3 29.Kg2 Ng5+-) 28...Kf7 (better 28...Nh3!? 29.Kh2 Kf7 30.Kh3 Qd4=+) 29.gf4 Qf4 (worse 29...Qd4 30.f5 Rd6 31.Bd7+-) 30.Re3 (better 30.Qe3 Qd6 31.Rad1 Bd4 32.e5 (32.Qh6?? Qg3 33.Kh1 Qf3 34.Kh2 Rh8-+) 32...Be3 33.ed6+=) 30...Qh4 (better 30...Qd6=) 31.Rf3+- Kg8 (31...Ke7 32.Qb4 Rd6 33.Rd1+-) 32.Qe6 Kh7 (32...Kh7 33.Rd1 Qg5 34.Rg3 Qf6 35.Qf6 Bf6+-). DEFFM – GuestXDML, freechess.org, 2016.

4.Nc3 Nc6 5.a3 e5 6.Be2 Bd6 7.Nf3 Be6 8.0-0 h6 (8...e4 9.Ng5+=) 9.h3 0-0 10.d3 Qd7 11.Qd2 e4 12.Nd4 Nd4 13.ed4 Bh3 14.Rfe1? (14.de4 de4 15.gh3 Qh3-/+) 14...Bg4 (14...ed3!? 15.Bd3 Qg4-+) 15.de4-/+ de4 16.Bg4 Qg4 17.Qe2 Qh4 18.g3 Qh3 19.Ne4 Rae8? (better is 19...Ne4!? 20.Qe4 b5=) 20.Nf6+/– gf6 21.Qf1 (21.Qf3 b6+/–) 21...Qg4 22.Re8 Re8 23.Re1 Rf8 (23...Re1 24.Qe1 b5 25.Kg2+=) 24.Qg2 Kh7 25.Qb7 Rg8 (better is 25...Bg3!? 26.Qg2 Bh2 27.Kh1 Qg2 28.Kg2 Bd6+/–) 26.Qg2 f5 0–1. rthurc (2315) – ramesis (2300), net–chess.com, 2013.

4.d3 e6 5.a3 c5 6.c3 Nc6 7.Nf3 c4 (better is 7...e5!?=+) 8.dc4+/– dc4 9.Qd8 Nd8 10.Bc4 g6 (10...Nc6 11.0-0+/–) 11.0-0 Bg7 12.Bd3 Nc6 13.c4 0-0 14.c5 Rd8 (Black gets the initiative) 15.Rd1 Ne4 16.Bg7 Kg7 17.Be2 Rd1 18.Bd1 Bd7 19.Bc2 Nf6 20.Bd3 (20.Nbd2 Rc8+-) 20...e5+/– 21.Nc3 Rd8 22.Rd1 Be6 23.h3?? (better is 23.Bc2 Rd1 24.Bd1+/–) 23...e4=+ 24.Ne4 (24.Be4 Ne4) 24...Ne4-/+ (25.Ne1 g5-/+) 0–1. Rosner,Dirk – Wobick,R, corr SOK–89–51, 1989.

4.Be2 e6 5.a3 Bd6 6.f4 0-0 7.Nf3 h6 8.c4 dc4 9.Bc4 c5 10.bc5 Bc5 11.Nc3 Nc6 12.0-0 b5 13.Be2 b4 14.ab4 Bb4 15.Qb3 Rb8 16.Qa4 (16...Rb6 17.Rfc1=; < 16.Ba6 Na5 17.Ra5 Qa5=+). ranzpendang – narendras, internet, 2007.

4.Bf6 ef6 5.a3 Bd6 6.Nf3 Bg4 7.Be2 0-0 8.Nd4 Bd7 9.Bg4 Bg4 (9...Be5!?+=) 10.Qg4+= Kh8 11.Nf5 Rg8 12.Nc3 Be5 (better is 12...c6+=) 13.f4?? (13.d4 Bd6+/–) 13...Bd6 (better is 13...Bc3 14.dc3 Qd7+=) 14.Nd5 c5 (14...a5!? 15.Rb1 Bb4 16.Nb4 ab4 17.ab4 Qd7+/–) 15.0-0+- Bf8 16.c4 cb4 17.ab4 Nc6 18.b5 Nb4 19.b6?? (better is 19.Nb4 Bb4 20.ba6 ba6 21.d4+-) 19...Nd5= 20.cd5 Qd5 21.d4 Qc6 (21...Qe6 22.Qh3=) 22.Rab1 (22.Qf3 Qd7 23.g4 Bb4=) 22...a5 23.Rfc1 Qe4 24.Re1 a4 25.Ra1 (25.Ng3 Qd5=) 25...Ra6 26.Ng3 Qc6 27.Reb1 Qc3 Black plans a3 (better is 27...Rb6!? 28.Rc1 Qe8+=) 28.Qf3+= a3 29.Rc1 Qd2 Black prepares a2 30.Rc7 Qb2 31.Qd1 Qb6 32.Rc8 Qd6 33.Rb1 a2 34.Ra1 b5 35.Qb3 b4 36.Ne2?? Ra3-+ 37.Qc4 Qe7?? 38.Qc1? Re3-+ 39.Ng3 b3 40.Rb8 Rd3 41.Ra8 Rd4 42.Nf5 Rd1 43.Qd1 Qc5 44.Kh1 Qf5?? 45.Qb3+= Qf4 46.Qf3 Qd2 47.R8a2 Qd4 48.Rd1 Qe5 49.Ra8 Qe7 50.g4 g6 51.h4 Qe5 52.Rdd8+= Qe1 53.Kg2 Qe7?? 54.Re8+- Qd6 55.Rad8 Qb4 56.Re4 Qb2 57.Kg3 f5= 58.gf5?? Qf6 59.Rg4?? Qd8-+ 60.f6 Qc7 61.Kh3 Bh6 62.Re4 Qd7 63.Kg2 Qd2 64.Re2 Qb4 65.Re5 Qh4 66.Re7 Qg5 67.Kf1 Qc1 68.Kg2 Qd2 69.Kh3 Qa2 70.Qe3 Be3 71.Rf7 Qf7 72.Kg4 Qf6 73.Kg3 Qf2 74.Kg4 Qf4 75.Kh3 Qf1 76.Kg4 h5 77.Kg3 Rf8 78.Kh2 Rf2 79.Kg3 Qg2 80.Kh4 Rf4 0–1. Willi_weizenkeim – Ivofle, playchess.de, 2005.

5.d3 Bb7 6.Nf3 e6 7.Be2 h6 8.c4 bc4 (8...dc4 9.dc4 Qd1 10.Kd1 bc4 11.Nbd2=) 9.dc4+= Ne4 (9...c5 10.bc5 Nbd7 11.0-0+=) 10.cd5 ed5 11.Nd4 Bd6 (11...Qg5 12.0-0+=) 12.0-0 (12.Nf5 Rg8+/–) 12...Nd7 (12...Qg5 13.Nf3 Qg6 14.Qd4+=) 13.Nc3 (13.Nf5!? Be5 14.Be5 Ne5 15.Ng7 Kf8 16.Nh5+/–) 13...0-0 14.Ne4 de4 15.Bh5 (15.Nf5 Ne5+/–) 15...Nf6 (15...Qg5 16.Rc1=) 16.Be2 Re8 (16...Nd7 17.Nf5 Ne5 18.Qd4+=) 17.Bc4 Re7 (17...Bd5!? 18.Bd5 Nd5+=) 18.Nf5+/– Re8 19.Qd4 (19.Qb3 Rf8+/–) 19...h5? (better is 19...Be5!? 20.Qd8 Rad8=) 20.Nd6 (20.Rfd1 Be7+-) 20...Qd6+/– 21.Qd6 cd6 22.h3 d5 23.Bb3 g5?? (better is 23...Rac8+/–) 24.Bf6+- g4 25.hg4 hg4 26.Rac1 Re6 27.Bd4 a5 (27...Rb8 28.f3 gf3 29.gf3 Rg6 30.Kf2 ef3 31.Rc7+-) 28.Rc7 Ba6 (28...a4 29.Ba2 Rb8 30.Ba7+-) 29.Rfc1 (29.Bd5 Rae8 30.Be6 Re6+-) 29...ab4 (29...Rd8 30.ba5 Red6 31.R1c5+-) 30.ab4 (30.Bd5 Rae8 31.Be6 Re6 32.ab4 Rd6+-) 30...Bb5 (30...Bc4 31.Bc4 dc4 32.R1c4 Rb8+-) 31.Bd5 Rae8 32.Be6 fe6 (32...Re6 33.R1c5 Be8 34.Rh5+-) 33.Rb7 (33.Rg7 Kf8 34.Rcc7 Re7 35.Rge7 g3 36.Rf7 Ke8 37.Rce7 Kd8 38.Bb6 Kc8 39.Rf8 Be8 40.Rfe8) 33...Ba4 (33...e5 34.Rb5 ed4 35.Rg5 Kf7 36.ed4 Rd8+-) 34.Rbc7 Bb5 35.Rc8 (35.Rg7 Kh8 36.Rcc7 e5 37.Rh7 Kg8 38.Bc5 Bd7 39.Rcd7 Re7 40.Rhe7 g3 41.Re8) 35...Kf7 36.Re8 Be8 (36...Ke8 37.Kh2+-) 37.Rb1 (37.Rc7!? Kf8+-) 37...Bb5 38.Rc1 Kg6?? (38...Be8 39.Rc7 Kf8+-) 39.Rc5+- Bd3 40.b5 Kf7 (40...g3 41.b6 Ba6 42.fg3+-) 41.b6 Ke7 42.b7 Kd6 (42...Ba6 43.Rc7 Kd6 44.b8Q Bc8 45.Rc8 Kd5 46.Qe5) 43.b8Q Ke7 (43...Kd7 44.Rc7 Kd6 45.Qd8) 44.Rc7 Kd6 45.Qd8 1–0. dsteel (2100) – valerypavlovich (2175), net–chess.com, 2016.

5.d4 Nbd7 6.Nd2 Nb6 7.Rc1 Bb7 8.Ngf3 e6 9.Bd3 Ne4 10.Be4 de4 11.Ne5 f6?? (better is 11...Qg5 12.Qg4 Qg4 13.Ng4 a5 14.ba5 Na4-/+) 12.Qh5+- Ke7 13.Ng6! hg6 14.Qh8 Kf7 15.Qh4 Be7 16.Qg4 (16.Ne4?! Nc4 17.Nd2 Nb2+=) 16...Qd5 17.Qe2 (17.c4 bc4 18.0-0 a5+/–) 17...Rh8? (better is 17...Qa2 18.Rb1 Nc4=) 18.c4+- bc4 19.Nc4 Na4 20.Ba1 Bc6 21.Qc2 Bb5 22.Nd2 Qg5 (22...Nb6 23.Bb2+- (23.Qc7 Rc8 24.Qc8 Nc8-+; 23.Ne4?! f5+/–)) 23.Qe4 Rh4 24.Qf3 Nb6 25.Rc7 Nd5 26.Ne4 (better is 26.Rc1!? Qh5 27.h3 Qf3 28.Nf3 Rh8+-) 26...Re4 27.Re7! (27.Qe4?! Nc7 28.Bb2 Bd6+=) 27...Ke7 (27...Ne7 28.Qe4 Zwischenzug; 27...Ke7 28.Qe4 Zwischenzug) 28.Qe4 Qh5 29.Qf3 Qh8 (29...Qf3 30.gf3 Nb6 31.Bb2+-) 30.Kd2 Qe8 31.e4 Nb6 32.Rc1 Nc4 (32...Qb8 33.e5+-) 33.Ke1 f5 (33...Qb8 34.e5! Nb6 35.Qe4+-) 34.ef5 gf5 35.Qg3 (35.Qb7 Qd7 36.Qd7 Kd7+-) 35...Qh5 (35...Qc6 36.Qg7 Ke8 37.d5 ed5 38.Rc2+-) 36.Rc4! Bc4 37.Qc7 Kf6 (37...Kf8 38.Qc4 Qh2 39.Qa6 Qg2 40.Qd6 Kf7 41.Bb2 Qe4 42.Kd2+-) 38.Qc4 (38.Qc4 Qh2 39.Qa6 Qg2 40.d5 Kg5 41.de6 Qh1 42.Qf1 Qe4 43.Kd2 Qd5 44.Kc2 Qe6 45.Bg7 Qc6 46.Kd2+-) 1–0. Haisma,Henk (1720) – Verweij,Florian (1625), Groningen Compact op–C, 2008.

5.Nf3 Nc6 6.d3 g6 7.c4 (White gets in control) 7...Bg7 8.cb5 ab5 9.d4 Bf5? (better is 9...Na7+=) 10.Bb5+- Bd7 11.Qc2 Na7 12.Bd7 Qd7 13.0-0 0-0 14.Rc1 Rfc8 15.Ne5 Qe8 16.Nd2 c6 17.Nb3 Rc7 (17...Ne4 18.f3 Nd6 19.Na5+-) 18.Nc5 Nb5 19.a4 Nd6 20.Ncd3 Rac8 21.a5 Nb5 22.Nc5 Ra7 23.Bc3 Qd8 24.Be1 Ne8 25.Na4 Be5 26.de5 Ng7 27.Nb6 Rcc7 28.f3 e6 29.Qd2 Nf5 30.Bf2 Ne7 (30...Qg5 31.f4 Qh6 32.e4 de4 33.Rc4+-) 31.e4 Ra6 32.Na4 d4 (32...Qe8 33.Qg5+-) 33.Nc5 Ra8 34.Rc4 Nc3 (34...Rcc8+-) 35.Rd4 (35...Ncd5 36.Bh4+-) 1–0. Skaza,Adam (1800) – Ciesielski,Stefan (1800), corr Poland, 1998.

5.Nf3 e6 6.Ne5 =.

5.c4 e6 6.c5 (6.cd5 ed5 7.Nc3 a5=) 6...Be7 (6...b6 7.cb6 cb6 8.Nf3=) 7.d4 (7.Nf3 0-0+=) 7...0-0 8.Bd3 Re8 (8...b6 9.Nc3=) 9.Nf3+= Bf8 (9...b6 10.Qc2+=) 10.0-0+- g6 11.Nbd2 Bg7 12.Qc2 Nb8 13.b5 (13.Bc3!?+-) 13...ab5= 14.Bb5 Bd7 15.a4 Nc6 16.Bc6 (16.Bc3 b6=) 16...Bc6 (worse 16...bc6 17.a5+=) 17.Ne5 Ra6 18.Nc6 Rc6 19.a5 Qa8 20.Rfb1 Nd7 (20...Qa6 21.Bc3=) 21.Bc3 e5 22.Qb3 ed4 23.ed4 Rb8 (23...Qa6!?=) 24.Rc1 (worse 24.Qd5 Nc5 25.a6 Na6=+) ½–½. Eigenmann,Peter – Boettcher,Elke, Schleswig Holstein–ch Seniors, 2009.

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 a6).

5.b5 ab5 6.ab5 Ra1 7.Ba1 cb5 8.Bb5 Nc6 9.c4 (9.Ne2 e6=) 9...e6 (9...dc4 10.Nf3=) 10.cd5 Nd5 11.Nc3 Bb4 12.Nd5 (12.Qa4 0-0=) 12...Qd5 13.Bc6 bc6 14.Nf3 (14.Bg7? Qg2 15.Qf3 Qg7-+) 14...Ba6 15.Qa4 (15.Qc2!?=+) 15...Qc4-/+ 16.Nd4?? (better 16.Qd1-/+) 16...Qc1 17.Qd1 Bd2 0–1. GuestVNNW – GuestBYTJ, freechess.org, 2017.

5.b5 ab5 6.ab5 Ra1 7.Ba1 cb5 8.Bb5 Bd7 9.c4 (9.Be2 e6=) 9...Bb5 10.cb5 Nbd7 11.Nf3 Qa5 (11...e6 12.Bf6 Nf6 13.Qb3=) 12.Qc2+= Qa8 13.0-0 e6 14.Nc3 (14.Bf6 Nf6 15.Qc7 Bb4=) 14...g6 (14...Bd6!?=) 15.e4+= de4 16.Ne4 Bg7 (16...Be7 17.Ne5 Ne4 18.Nd7+-) 17.Nd6 (better 17.Bf6 Bf6 18.Qc7+-) 17...Kf8? (better 17...Ke7!? 18.Bc3 b6+-) 18.Ng5+- Nd5 19.Bg7 Kg7 20.Ngf7 Rf8 (20...Qa3 21.Nc4 Rc8 22.Nfd6 Rc4 23.Nc4+-) 21.Qb2 Kg8 (21...e5 22.Ne5 N7f6+-) 22.Qh8 1–0. DEFFM – iueoiueo, freechess.org, 2018.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 (8.Nf3 Nbd7=) 8...b6 (8...Bf5 9.Bf6 ef6 10.cd5 Qd5 11.Nc3=) 9.Nf3 (9.d4 e6=) 9...dc4 (9...e6 10.d4=) 10.Bc4+= e6 11.0-0 (11.d4 Bb7+=) 11...Be7 (11...Bb7 12.d4+=) 12.Ne5 (12.d4 Bb7+=) 12...0-0 (12...Bb7 13.d4=) 13.d4 Nfd7 (13...Bb7!?=) 14.Nc6+= Nc6 15.bc6 Nb8 16.Bb5 (16.dc5 bc5 17.Qd8 Bd8=) 16...Qc7= 17.d5 (17.dc5 bc5 18.Qg4 f6=) 17...ed5 (17...Bd6!?=) 18.Nc3+= Be6 (18...d4 19.Nd5 Qe5 20.Ne7 Qe7 21.ed4+-) 19.Nd5+- Bd5 20.Qd5 Rc8 (better 20...Bd6+-) 21.Be5+- Qa7?? (21...Qd8 22.Qd8 Bd8+-) 22.Ra1 Rd8 (22...Qa1 23.Ba1 Nc6 24.Bc6 Rd8+-) 23.Ra7 Rd5 24.Re7 Rd1 25.Bf1 Nc6 26.Re8 1–0. DEFFM – GuestXCDZ, freechess.org, 2018.

5.b5 Bd7 6.Nf3 e6 7.c4 (7.Be2 Bd6=) 7...dc4=+ 8.Bc4 Bd6 (8...ab5 9.ab5 Ra1 10.Ba1 cb5 11.Be2=+) 9.Nc3= c5 (9...ab5 10.ab5 Ra1 11.Qa1=) 10.0-0+= 0-0 11.Qb3 b6 12.Qc2 Bc8 13.Bd3 (13.Ne4 Ne4 14.Qe4 Ra7+=) 13...Bb7= 14.Ne4 Nbd7?? (better 14...Be4 15.Be4 Ne4 16.Qe4 Ra7=) 15.Nd6+- (15.Nd6 Bf3 16.gf3+-) 1–0. DEFFM – GuestDBQS, freechess.org, 2018.

5.c4 Be6 6.c5 Bg4 7.f3 Bf5 8.a5 Nbd7 9.Nc3 e5 10.d4 Qe7 11.g4 Bg6 12.Qd2 (12.de5 Ne5 13.g5 Nh5=+) 12...ed4 13.Qd4 0-0-0 14.0-0-0 h5 15.g5 Ne8 16.h4 Ne5 17.Bh3 Kb8 18.f4 Nc4 19.f5 Qe3 (better is 19...Bh7!?=+) 20.Qe3+= Ne3 21.fg6 Nd1 22.Kd1 f6 (22...fg6!? 23.Be6 Nc7+=) 23.Nf3+/– Nc7? (23...d4 24.Ne4 fg5 25.Neg5 Be7+-) 24.gf6+- gf6 25.Nd4 Bh6 26.Nce2 Be3 27.Bc1 Rde8 28.Be3 Re3 29.Kd2 Re5 30.Rg1 Ne8 31.Be6 Ng7+/– 32.Bf7 Re4 33.Rf1 Rh4 34.Nf5 Nf5+= 35.Rf5 Rg4 36.Rf4 Rg2 37.Rf1 h4 38.Rg1 Rg1-/+ 39.Ng1 h3 40.Nh3 Rh3 41.g7 Rg3?? 42.g8Q+- Rg8 43.Bg8 (43...f5 44.Be6+/–) 1–0. Filipov,V – van Duske,L, corr ICCF EU–H–GT–7, 1988.

5.b5 Na5 6.Nf3 b6 (6...g6 7.Bc3 c5 8.Be5=) 7.Bd3 Bg4 (7...Nc4 8.Bc4 dc4 9.Nc3+=) 8.0-0 (better 8.h3 Bh5 9.ba6+-) 8...e5? (better 8...Nc4!? 9.Bc4 dc4+=) 9.Be5+- (9.ba6? e4 10.Bb5 c6-+) 9...Bb4 (9...ab5 10.ab5 Bd6 11.Bf6 Qf6 12.Nc3 Bf3 13.Qf3 (13.gf3?! Bh2 14.Kh2 Qh4 15.Kg2 Qg5 16.Kh3 Qh5 17.Kg3 Qg5 18.Kh3 Qh5 19.Kg3 Qg5 20.Kh3=) 13...Qf3 14.gf3+-) 10.h3+- Bh5 11.g4 (11.ba6!? 0-0 12.Nc3 Nd7+-) 11...Bg6+- 12.Qe2 (12.Nc3 0-0+-) 12...Qe7 (better 12...Bd3!? 13.Qd3 h5 14.Bf6 Qf6 15.Qd5 0-0+-) 13.ba6+- Qc5?? (13...c6 14.Nc3 Bd3 15.Qd3 Nc4 16.Bf6 Qf6 17.Nd5 cd5 18.Qd5 Rc8+-) 14.c3 Bd3 15.Qd3 (15.cb4 Be2 16.bc5 Bf3 17.Bc7 Nb3-+) 15...Nb3 (15...Nc6 16.cb4 Nb4 17.Qf5+-) 16.cb4 Ne4 (16...Qc4 17.Qc4 dc4+-) 17.bc5 Nbc5 18.Qd5 0-0 19.d4 Rad8 20.Qc6 Nd3 21.Qe4 (21.Qe4 Ne5 22.de5+-) 1–0. GuestRDTL – GuestKHFM, freechess.org, 2019.

7.Ba1 Na5 8.Bd4 b6 (8...Bg4 9.Be2 Bf5 10.Nf3+=) 9.Nf3+= Bg4 10.Be2 e6 11.Ne5 Be2 12.Qe2 Bd6 13.Nc3 (13.f4 Be5 14.fe5 Ne4=) 13...Qe7 (13...Be5 14.Be5 0-0 15.0-0=) 14.0-0 0-0 (14...Be5 15.Be5 Nc4 16.Ra1+/–) 15.Na4 (15.e4 Rd8+=) 15...Rc8 (15...Nd7 16.Nd7 Qd7 17.Qg4=+) 16.Ra1 (16.f4 Ra8=) 16...h6 (16...Be5 17.Be5 Nc4 18.f4=) 17.f4 c5 (17...Qe8 18.Nc3+=) 18.bc6 (18.Nb6 Rb8 19.Ra5 cd4+-) 18...Nc6 19.Nc6 Rc6+= 20.Nb6 Bc5 21.Bf6 Qf6 22.Ra8 Kh7 23.Nd7 Qe7? 24.Qd3 g6 25.Ne5 Rd6 26.Qc3 Bb6?? 27.Nc6 d4 28.Qd4?? Bd4?? 29.Ne7+- Bb6 30.Nc8 Rd2 31.Nb6 Rc2 32.Ra3 Kg7 33.Nd7 Rd2 34.Ne5 h5 35.Ra7 Re2 36.Rf7 Kh6 37.Rf6 Re3 38.Re6 Re4 39.Nf7 Kg7 40.Re4 Kf7 41.Kf2 Kf6 42.Kf3 Kf5 43.Re5 Kf6 44.g4 hg4 45.Kg4 Kf7 46.h4 Kg7 47.h5 Kh6 48.hg6 Kg6 49.Rg5 Kf6 50.f5 Ke7 51.Rg6 Kf7 52.Kg5 Ke7 53.f6 Kf8 54.Rh6 Kf7 55.Rh7 Kg8 56.Kg6 Kf8 57.Rh8 1–0. Madel,K – Rehak,Martin (2230), Plzen KB op–B U18, 1997.

7.Ba1 Nb8 8.c4 dc4 9.Bc4 e6 10.Nf3 Bb4 11.Nc3 c6 12.0-0 Bd7 13.Qb3 Be7 14.Bb2 cb5 15.Nb5 Ne4? (better 15...Nc6!?+=) 16.Bg7+- Rg8 17.Bb2 (17.Be5!?+-) 17...Bc6+- The backward pawn on d2 becomes a target 18.Ra1?? (better 18.Nbd4 Nd2 19.Nc6 (19.Nd2?? Rg2 20.Kh1 Bd6-+) 19...Nf3 20.Kh1 bc6 21.gf3=) 18...Nd2-+ 19.Nd2 (19.Qc3 Nf3 20.Kh1-+) 19...Qd2 (better 19...Rg2 20.Kf1 Qd2 21.Nc7 Kf8 22.Bg7 Kg7-+) 20.Bf1 Nd7?? (better 20...Na6!? 21.Nd4 Nc5+=) 21.Ra8 (21.Nc7 Kd8 22.Ne6 fe6 23.Ra8 Kc7 24.Rg8 Bd5+-) 21...Bd8 22.Nc7 (22.Bc3 Nc5 23.Qb1+- (23.Bd2?! Nb3 24.Bb4 f5+=)) 22...Ke7+- 23.Ba3 Kf6 24.Qc4 Ne5? (24...Rg2 25.Bg2 Qd1 26.Bf1 Qf3 27.Ne8 Kg6 28.Bd3 Kh6 29.Qf4 Qf4 30.ef4 Bf6+-) 25.Qf4 Kg6 26.Qe5 Bf6 (26...h6 27.Ne6! fe6 28.Qe6 Kh7+-) 27.Rf8 (27.Rg8 Kh6 28.Qf6 Kh5 29.Qg5). GuestTQVC – GuestTSHH, freechess.org, 2017.

7.Ba1 Nb8 8.Nf3 c6 9.c4 (9.Be2 Bg4=) 9...dc4 (9...e6 10.Bd4=) 10.Bc4+= cb5 11.Bb5 Bd7 12.Bd7 Qd7 13.0-0 e6 14.Bf6 gf6 15.Nc3 Bg7 (15...Nc6 16.Ne4 Be7 17.Qa1+-) 16.Qb3 0-0 17.Rb1 f5 18.Qb7 Qd3 19.Qb5 Qc2 20.Ne2 Rd8 21.d4 Rd5?? (better 21...Na6 22.Rc1 Nc7+-) 22.Qb8 Bf8 23.Re1 (better 23.Kf1 Rd8 24.Qg3 Bg7 25.Rc1+-) 23...Kg7 (23...Rd7+-) 24.Qg3 (better 24.Nf4 Kg8 25.Qb7 Bd6 26.Nd5 ed5 27.Qd5 Qc7 28.Qf5 h6+-) 24…Kh8 1–0. GuestKXKG – attrage, freechess.org, 2020.

7.Ba1 Nb8 8.Nf3 e6 9.c4 Be7 10.Be2 0-0 11.0-0 c5 12.d4 cd4 13.Nd4 (13.Bd4 b6+=) 13...dc4 14.Nd2 Nbd7 15.Nc4 Nb6 16.Ne5 Nbd7 17.Nef3 Nc5 18.Qb1 b6 (18...Bd6 19.Rd1+=) 19.Rd1 Bb7? (19...Qe8!?+/-) 20.Nc6 (20.Ne6 fe6 21.Rd8 Rd8+-) 20...Qe8 21.Ne7 (better 21.Ng5 g6 22.Ne7 Qe7 23.Qb2+-) 21...Qe7+= 22.Nd4 Rd8 (22...Rc8 23.Qb2=) 23.Bf3 (23.Nc6!? Rd1 24.Bd1+=) 23...Bf3= 24.Nf3 Rd1 25.Qd1 Qd7 26.Qb1 Qd3 (26...Nfe4 27.Bd4=) 27.Qd3+= Nd3 28.Bd4 (28.Bf6 gf6 29.Nd2 Nb2+=) 28...Ne4 29.Bb6 Nc3 (worse 29...Ndf2 30.Bd4 Nd3 31.b6+/-; worse 29...Nef2 30.Ne1 Ne1 31.Kf2 Nd3 32.Ke2+/-) 30.Nd4 (30.Kf1 Nb5 31.Ke2 Nb4=) 30...e5 31.Nc6 Nb5 32.Kf1 Nc3 (32...Nd6 33.Ke2 e4 34.f3=) 33.f3 (33.Ne5 Ne5 34.Bd4 Ng4 35.Bc3 Nh2 36.Ke2 Ng4+=) 33...e4 (33...Nd5 34.Ba5=) 34.f4 (better 34.Bd4!? Na2 35.fe4+/-) 34...g6 35.Bd4 Nb5 36.Bb6 (36.g4 Nd4 37.Nd4 Kg7=) 36...Nd6 37.Ne7 Kf8 38.Nd5 Nc4 39.Bd4 Kg8 (better 39...f5=+) 40.Nf6+/- Kf8 41.Ne4 Ke7 (41...f5 42.Nf6 h6 43.g4+/-) 42.Nc5 (42.g4!?+/-) 42...Nc5+= 43.Bc5 Ke6 44.Bd4 Nd6 45.Ke2 f5 46.Kf3 Ne4 47.g4 Kf7 48.gf5 gf5 49.Be5 Kg6 50.h4 (50.Ke2 Kh5 51.Kf1 h6+=) 50...Kf7 (better 50...Kh5=+) 51.h5+= Ke6 52.Ke2 (52.Bd4 Nd2 53.Kf2 Ne4 54.Kg2 Kd5+=) 52...Kf7 53.Kd3 Ke6 (53...h6 54.Bc3=) 54.Kd4 Kf7 55.Kd5 Ke7 (55...Ng3 56.h6+=) 56.h6 (better 56.Bd4!?+/-) 56...Kf7+= 57.Bg7 Ng3 58.Ke5 Kg6 59.Ke6 Ne4 60.Ke5 Ng3 61.Bf8 Ne4 62.Kd4 Ng3 (62...Nf6 63.Be7 Ng4 64.Bg5=) 63.e4 (63.Kd3 Nh5=) 63...Ne4 64.Ke3 (better 64.Ke5=) 64...Nf6-/+ 65.Kf3 Ng4 66.Kg3 Nf6 67.Bg7?? (67.Kf3 Ng8-/+) 67...Ng4 (better 67...Nh5!? 68.Kh4 Nf4-+ (68...Ng7?! 69.hg7 Kg7 70.Kg5=)) 68.Kh4 (68.Bf8 Nh6 69.Bc5 Ng4-/+) 68...Nf6 (better 68...Nh6!? 69.Bd4 Ng4-/+) 69.Bf6 Kf6 70.Kh5 Kf7 71.Kg5 Ke6 72.Kh5?? (better 72.Kh4 Kd5 73.Kh5=) 72...Kf6-+ 73.Kh4 Kg6 74.Kh3 1-0. BeepBeepImAJeep (2675) - bigsotos2418 (2510), lichess.org, 2016.

7.Ba1 Nb8 8.Nf3 Bg4 9.h3 Bh5 10.g4 Bg6 11.Be2 e6 12.0-0 (12.Nc3 Bd6=) 12...Bd6=+ 13.Nh4 (13.d3 Nbd7=+) 13...0-0 (13...Ne4 14.Ng2 f6 15.Nc3=+) 14.Ng6 fg6 15.f4 Ne4 16.Kg2 Qh4 (16...g5 17.d3 Nc5 18.f5=) 17.Qe1 Qe1 (17...Qe7!?=) 18.Re1+= Nd7 19.d3 Nef6 (19...Ra8 20.Bd4 Nec5 21.Nc3+=) 20.g5+- Ne8 21.Bg4 Kf7 22.e4 c6? (better 22...de4 23.Re4 Ke7+-) 23.ed5+- Nc5 (23...cd5 24.Be6 Ke7 25.Bd5 Kd8 26.Bb7 Bf4 27.h4+-) 24.d4 Na4 (24...ed5 25.dc5 Bc5 26.Be6 Ke7 27.bc6 bc6 28.Bd5 Kd7 29.Be6 Kd8 30.Be5+-) 25.Be6 (worse 25.dc6 Nc7 26.cb7 Nb6+-) 25...Ke7 26.dc6 bc6 27.Bb3 Kd7 (27...Kd8 28.Ba4 cb5 29.Bb5+-) 28.Ba4 Bf4 29.bc6 Kc7 (29...Kd8 30.Bc3 Nd6 31.Bd2 Bd2 32.Nd2+-) 30.d5 (30.Re7 Kd8 31.Rd7 Kc8+-) 30...Bg5 (30...Nd6 31.Bg7 Rf5 32.Re7 Kc8 33.h4 Rd5 34.Bf6+-) 31.Be5 Nd6 (31...Kc8 32.d6 Nd6 33.Bd6+-) 32.Na3 Be7 (32...Bf4 33.Nb5 Kb6 34.Bd6 Bd6 35.Nd6+-) 33.Nb5 Kb6 34.Nd6 Ka5 35.Bc3 Kb6 36.Re7 (36.Re7 Rf2 37.Kf2 Kc5 38.Ne4 Kc4 39.Bb3 Kb5 40.Rb7 Ka6 41.Bc4) 1–0. onur604 (2320) – ahengaran1974 (2040), lichess.org, 2020.

8.c4 dc4 9.Bc4 e6 10.Nf3 (10.Qa4 Bc5+=) 10...Bc5 (10...Bd7 11.Qe2=) 11.d4+= Bb4 (11...Bb6 12.0-0+=) 12.Nbd2 (12.Bc3 Bc3 13.Nc3+=) 12...c5? (12...c6!?+=) 13.0-0 (13.Qa4 Qb6 14.dc5 Qc5+-) 13...cd4 (13...Bd7 14.dc5 Bc5 15.Qe2+-) 14.Nd4 (14.Bd4 Qa5 15.Qe2 Nc6 16.bc6 bc6 17.Bf6 gf6+-) 14...Qa5 Exerts pressure on the isolated pawn (14...Bd7 15.N2f3+=) 15.N2f3 (15.N4b3!? Qd8 16.Bd4+-) 15...0-0+- 16.Qb3 (16.Nb3 Qc7 17.Qe2 Nd5+-) 16...Ne4 (16...Bd7 17.Bb2 Bd6 18.Rd1+-) 17.Bb2 (17.Rb1 Be7 18.b6+-) 17...Bd7?? Increasing the pressure on the isolated pawn on b5 (better 17...Nc5 18.Qc2 Bd7+-) 18.Ra1+- Nc5 (18...Qb6 19.Qb4 Rd8+-) 19.Qc2 (better 19.Ra5 Nb3 20.Ra7 (worse 20.Bb3 Ba5 21.Bc4 Rd8-+; 20.Nb3?! Ba5 21.Na5 b6+-) 20...Nd4 21.Bd4+-) 19...Qb6+- 20.Qe2 (better 20.Ne5 Be8 21.Qe2+-) 20...Nc8? (20...Rd8 21.Nc2 Ba5 22.Bd4+-) 21.Ne5 (21.Nc2 Ba5 22.Bd4 Nd6+-) 21...Be8 (21...Qc7 22.Nc2 Ba5 23.Qg4+- (23.Nd7?! Nd7 24.Ra5 Qa5+-)) 22.Ra8 (better 22.Nc2!? Ba5 23.Bd4+-) 22...Nd6+- 23.Ra1 (23.Nc2 f6 24.Nb4 fe5 25.Be5 Nc4 26.Qc4 Bg6 27.Rf8 Kf8+-) 23...Nc4 (23...Nc8 24.Nc2 Ba5+-) 24.Nc4 (better 24.Qc4 Qd6 25.Qb4 Qe5 26.Ne6 Qe6 27.Qc5+-) 24...Bb5? (better 24...Qc7!?+-) 25.Nb6 (better 25.Qg4!? h5 26.Qg7 Kg7 27.Nb5 Kg6 28.Nb6 Rd8+-) 25...Be2 26.Ne2 Nd3 (26...Rd8 27.Bd4+-) 27.Ba3 Ba3 28.Ra3 Rd8 29.Ra8 (better 29.Nd4!? Nc5 30.f4 Kf8+-) 29...Ra8+- 30.Na8 b5 31.Nb6 (31.Nd4 b4+-) 31...b4 (31...e5 32.Nd5+-) 32.Nd4+- e5 33.Nb3 f5 34.Kf1 Kf7 35.Ke2 e4 36.f3 Ke6 37.g4 g6 (37...fg4 38.fe4 Ne5 39.Nd5+-) 38.gf5 gf5 39.Nd4 Ke5 40.f4 (better 40.Kd2+-) 40...Nf4+- 41.Kd2 (41.ef4 Kd4 42.Kd2 e3 43.Ke2 Ke4-/+) 41...Nd3 42.Kc2 (better 42.Nd7!? Kd5 43.Nf6 (43.Nf5?! Ke6=) 43...Ke5 44.Nh7+-) 42...f4+= 43.Nc4 (43.Nd7 Kd5+=) 43...Kd5= 44.Nd2 (better 44.Kb3!?=) 44...fe3-/+ 45.N4b3?? (better 45.N2b3-/+) 45...ed2 (better 45...e2 46.Ne4 Ke4 47.Nd2 Ke3 48.Nc4 Kd4-+) 46.Kd2 Kc4 (46...Kc4 47.Na5 Kc5 48.Nb3 Kc6 49.Na5 Kd6-+) 0–1. GuestJZNN – GuestQDKZ, freechess.org, 2018.

8.c4 c6 9.Nc3 (9.Qa4 Qb6+=) 9...dc4 (9...e5 10.d4 ed4 11.Qd4=) 10.Bc4 cb5 11.Nb5 Nb5 12.Bb5 Bd7 13.Bc4 (13.Bd7 Qd7 14.Nf3 Nd5=) 13...b5 (13...e6 14.Nf3=) 14.Bb3 (14.Be2 Bc6 15.Nf3 e6=) 14...e6 (14...Bc6 15.Nf3=) 15.Nf3= Bd6 16.0-0 0-0 17.d3 Qb8 (17...Ng4 18.h3 Nh6 19.Qe2=) 18.h3 (18.Bf6 gf6 19.Qa1 e5+=) 18...Bc6 (18...e5 19.Qe2=) 19.Nd4 (19.Bf6 gf6 20.Nd4 Rc8+=) 19...Bd5 (19...Ba8 20.Qe2=) 20.e4 (20.Bd5 Nd5 21.Qg4 Nf6+=) 20...Bb3 (20...Ba8!?=) 21.Qb3+= b4 22.e5 (better is 22.Nc2=) 22...Bc5?? (better is 22...Be5 23.Nc6 Bh2 24.Kh1 Qd6 25.Bf6 gf6 26.Qb4 Qb4 27.Nb4 Be5=) 23.ef6+- Bd4 (23...gf6 24.Nc2+-) 24.Bd4 g6 (24...Rd8 25.Bc5+-) 25.Bc5 (25.Rb1 Qb5+-) 25...Rc8 26.d4 (26.Qb4!? Qb4 27.Bb4 Rc2+-) 26...Qf4 27.Qb4 Qf6 28.Bd6 Qd8 29.Ra1 Rc6 (29...Ra8 30.Ra8 Qa8 31.Be5+-) 30.Bc5 (better is 30.Be5+-) 30...Qd5 (30...Rc8+-) 31.Ra8 Kg7 32.Bf8 Kf6 33.Qe7 (33...Kf5 34.Qf7 Ke4 35.Qf3 Kd4 36.Ra4 Qc4 37.Bg7 Kc5 38.Rc4 Kc4 39.Qc6 Kb4 40.Be5 Ka3 41.Qe6 Kb4 42.Qe7 Kc4 43.Qh7 g5 44.Qg8 Kc5 45.g4 Kc6 46.Kg2 Kc5 47.Qg5 Kc6 48.Qf6 Kb5 49.f4 Kc5 50.f5 Kb5 51.g5 Kc5 52.Qd6 Kb5 53.f6 Kc4 54.f7 Kb5 55.g6 Kc4 56.g7 Kb5 57.Qd5 Kb6 58.Qb3 Kc6 59.f8Q Kd7 60.Qd5) 1–0. Fredek (2090) – Guest541622, Freundschaftspartie, 5m + 0s, 2005.

8.Bd4 Nb5? (better 8...b6 9.Nc3 c5 10.bc6 e6+-) 9.Bb5+- c6 10.Be2 Qd6 (10...e6 11.Nc3+-) 11.f4 Ne4 12.Nf3 f6 (12...c5 13.Ba1+-) 13.0-0 Bg4 (13...e6 14.d3 Nc5 15.Nbd2+-) 14.d3 Nc5 15.Nc3 Ne6 16.Ba7 (16.Nh4 Be2 17.Ne2 g6+-) 16...g6 17.h3 Bf3 18.Bf3 (18.Rf3?! Qa3 19.Nd5 cd5=; 18.gf3?! g5+-) 18...Bg7 19.f5! Ng5 (19...gf5 20.e4 Double attack (20.e4 Decoy)) 20.fg6 (20.h4!? Nf3 21.Qf3 0-0+-) 20...hg6 21.Qe1 (21.Ne2 0-0+-) 21...0-0 (better 21...Qc7 22.Bd4 c5 23.Nd5 Qd6 24.Ne7 Qe7+-) 22.d4 f5 23.Bc5 Qd7 (23...Qe6 24.Kh2+-) 24.Qg3 Bf6 25.Be2 Rf7 (25...Kh7 26.Ra1+-) 26.h4 Ne4 (26...Ne6 27.Na4 g5+-) 27.Ne4 de4 (27...fe4 28.h5 g5+-) 28.Qg6 Rg7 29.Bc4 Kh8 30.Qh6 Rh7 31.Qf8 1–0. GuestVDQH – GuestCNDL, freechess.org, 2019.

8.Nf3 Bd7 9.c4 dc4=+ 10.Bc4 Nb5 11.Bf7?? (better 11.Bf6 ef6 12.d4=+) 11...Kf7-+ 12.Qb3 e6 13.Ne5 Ke8 14.0-0 Bd6 15.Nd7 Qd7 (worse 15...Kd7 16.Qb5 c6 17.Qb7 Qc7 18.Qc7 Kc7 19.Bf6 gf6 20.Nc3+-) 16.f4 (16.Nc3 Nc3 17.Bc3 c6-+) 16...c6 17.Qa4 (17.Bf6 gf6 18.Nc3 Nc3 19.Qc3 e5-+) 17...Kf7 18.Be5 Rf8 19.Nc3 Nc3 20.Bc3 (20.dc3 Nd5 21.Qd4 c5-+) 20...Kg8 21.Qa7 Ne4 22.Rb1 Nc3 (better 22...Rf7-+) 23.Rb7 Qb7 24.Qb7 Rb8 (better 24...Ne2!? 25.Kf2 Nf4 26.ef4 Bf4 27.Qc6 Bh2 28.Ke1 Kf7+-) 25.Qc6+- Rb1? (better 25...Nb5 26.Qd7 Kf8+-) 26.Kf2 Nd1 (26...Kf7 27.dc3 Be7 28.c4+-) 27.Ke2 Be7 (27...Bf8 28.Qe6 Kh8+-) 28.Qe6 Kf8 29.Qc8 Kf7 30.Qf5 (30.Qf5 Kg8 31.Qb1 Ne3 32.de3+-) 1–0. GuestYSND – GuestKCHQ, freechess.org, 2019.

8.Nf3 Bd7 9.Bf6 ef6 10.Nc3= Be6 11.Be2 Bb4 12.0-0 0-0 13.Qa1.

8.Nf3 Bg4 9.Bf6 (9.Bd4 A) 9...b6 10.h3 (10.Nc3 e6 11.h3 Bf3 12.Qf3 Nd7 13.Na4; 10.Be2 e6 11.Ne5 Be2 12.Qe2 Bd6 13.Nc3) 10...Bd7 11.Nc3 e6 12.Qa1 Nc8 13.Be2; B) 9...Nc8= 10.h3 Bf5 11.Nc3 e6 12.Ne5 Nd7 13.g4; 9.h3 Bd7 10.Bf6 ef6 11.Nc3 Be6 12.Be2 Bb4 13.0-0) 9...ef6 10.c4 (10.Nc3 Bc5= 11.Be2 0-0 12.0-0 c6 13.Qb1; 10.h3 Be6 11.d4 Qd7 12.b6 cb6 13.Bd3; 10.b6 cb6 11.Be2 Nc6 12.0-0 Bc5 13.d4; 10.d4 Qd7 11.b6 cb6 12.Bd3 Bb4 13.c3) 10...dc4 (10...Nc8 11.cd5 Nb6 12.h3 Bf5 13.Nd4) 11.Bc4 Bd6 (11...Be7 12.0-0 Qd7 13.Qe2= 0.19/9 (13.Nc3=); 11...Qd7 12.Nc3 Nc8 13.0-0) 12.0-0 (12.Qa4 Bf3 13.gf3 Qb8=) 12...0-0 (12...Qd7 13.Nc3=) 13.h3 (13.d4 Qd7=; 13.Qa4=) 13...Be6 (13...Bh5 14.d4=) 14.d3 (14.Be6 fe6 15.Qa4 Qb8+=) 14...Qd7 Exerts pressure on the isolated pawn (14...c6 15.Nd4 Qd7 16.Ne6 fe6 17.Qb3+=) 15.Nd4 Rd8 (15...Bc4 16.dc4 c5 17.Nf5 Bh2 18.Kh2 Qf5 19.Kg1+=) 16.Ne6+= fe6 17.Qb3 Kf7 (17...Re8 18.Nc3+=) 18.Nc3 (18.f4 g6+=) 18...Nc8 19.Ne2 (better 19.d4+-) 19...Ke7? (19...Nb6 20.Ra1+=) 20.Re1 (20.Nd4 e5 21.Ne6 Rh8 22.Ng7 Kd8 23.Ne6 Ke7+-) 20...e5 (20...Nb6 21.Ra1+=) 21.f4 (21.Bg8 Ke8+-) 21...Qf5 (21...h6 22.Bg8 Re8 23.fe5 fe5 24.Bd5+-) 22.e4 (22.Bd5 b6+-) 22...Qh5+= 23.Ng3 Bc5 (23...Qe8 24.fe5 Be5 25.Qb4 Bd6 26.Nf5 Kf8 27.Nd6 Nd6 28.d4+=) 24.Kh2 Qg6 25.Nf5 Kf8 (25...Ke8 26.Bd5 Ne7 27.Ne7 Ke7 28.fe5 fe5 29.Bb7+-) 26.fe5+- fe5?? (better 26...Ne7 27.Rf1 Nf5 28.Rf5 Bd4 29.ef6 gf6+-) 27.Rf1 Qg5 (27...Qf6 28.Rf3+-) 28.Nd6 (better 28.Nd4! Ke7 29.Rf7 Ke8+-) 28...Ke7 29.Nf7 (29.Nb7 Be3 30.Rf7 Ke8 31.Nd8 Bf4 32.Kg1 Qd8+-) 29...Qh5 (29...Qe3 30.Nd8 Kd8 31.Bg8+-) 30.Nd8 (better 30.Rf5 Qf5 31.ef5+-) 30...Kd8 31.Rf8?? (better 31.Bf7 Qh6 32.Qd5 Qd6 33.Qb7+-) 31...Bf8-+ 32.Bf7 (32.Bd5 Nd6-+) 32...Qh6 33.Qd5 Nd6 34.Be6 (34.Bg8 Qf4 35.Kg1 h5-+) 34...Qf4 35.Kh1 (35.Kg1 Be7 36.Bg4 Bh4 37.Qg8 Ke7 38.Qg7 Nf7-+) 35...Be7 (35...g6 36.Bg4 Bh6 37.Qg8 Ke7 38.Kg1 Qc1 39.Kh2 Bf4 40.g3-+) 36.Bg4 Bg5 37.Qg8 Ne8 38.Qd5 Ke7 39.Qe6 (39.Qc5 Kf7-+) 39...Kf8 40.Qf5 Qf5 41.Bf5 (41.ef5 Nd6-+) 41...g6 (41...Kf7!? 42.Bh7 g6 43.g3-+) 42.Be6 Nd6 43.Bc4 (43.Bd5 Nb5 44.Bb7 Nd4-+) 43...Nc4 44.dc4 Ke7 45.Kg1 (45.c5 Kd7-+) 45…Kd6 0–1. hal1958 – treebeard, playchess.de, 2003.

8.Bf6 ef6 9.Nf3 c5 10.c4 Be6 11.Qa4 (11.cd5 Bd5 12.Nc3 Be6+=) 11...Qb6 (11...Nc8 12.cd5 Nb6 13.Qe4 Nd5 14.Bc4=) 12.d3 Bd6 13.Be2 0-0 14.0-0 Bc7 15.Nc3 dc4 (15...d4 16.ed4 cd4 17.Ne4+=) 16.dc4+= Rd8 17.e4 Qa5 (17...Nc8 18.Nd5 Qd6 19.Rd1=) 18.Qa5 Ba5 19.Nd5 Nc8 20.Ra1 b6 21.h3 Kf8 22.g4 Rd6 (22...Nd6 23.Bd3+=) 23.Nh4 Ne7 24.Nf5 (24.f4 Bd7+-) 24...Nf5 25.gf5 Bc8 26.Rd1 g6 27.Bd3 gf5 28.ef5 Kg7 29.Kh2 Kh6 30.Rg1 Bb7 31.Be4 Bd5 32.Bd5 Rd7 33.Rg8 Bc3 34.Kg3 Be5 35.f4 Bd4 (35...Bc3 36.Kg4+-) 36.Kg4 (36.Rb8 Rd6+-) 36...Re7 (36...Bc3!?+-) 37.Rb8+- Re1 38.Rb6 Rg1 39.Kf3 Rf1 40.Kg3 Rg1 41.Bg2 Re1 (41...Rc1 42.Rd6 Rc4 43.b6+-) 42.Rb7 Kg7 (42...Rc1 43.b6 Rc3 44.Bf3 Rc4 45.Re7+-) 43.Ra7 Re3 44.Bf3 Rc3? (44...Rb3+-) 45.b6 Rc4 46.b7 Rb4 47.Ra8 Rb2 48.b8Q Bf2 49.Kg4 Rb8 50.Rb8 Bd4 51.Bd5 h6 52.Rb7 Kh8 (52...Kf8+-) 53.Rf7 h5 54.Kh5 c4 (54...Ba1 55.Kg6 Kg8 56.Rf6 Kh8 57.Rf8) 55.Bc4 (55.Kg6 Kg8 56.Rf6 Kh8 57.Rf8) 55...Be3 (55...Kg8 56.Rf6 Kg7 57.Rf7 Kg8 58.Kg6 Bc5 59.f6 Bf2 60.Rd7 Kf8 61.Rd8) 56.Kg6 Bc5 (56...Kg8 57.Rf6 Kh8 58.Rf8) 57.Rh7 1–0. GuestDHGV – GuestVPRF, freechess.org, 2017.

8.c3 Na2 9.Qa4 Nc1 10.Qc2 e5 (10...c5 11.Qc1 e5 12.d3+-) 11.Qc1 Bf5 (11...Bc5 12.d4 ed4 13.cd4+-) 12.Nf3 Qa8 (12...Bd6 13.c4 Qe7 14.cd5 Nd5 15.Nc3+-) 13.Bb2 Bc5 (13...Qa2 14.Na3 Bd6 15.c4+-) 14.c4 Qa5 (14...d4 15.Ne5 Qa7 16.Bd3+-) 15.cd5 Nd5 (15...Bd6 16.Ne5 0-0+-) 16.Qc5 Bb1 (16...c6 17.Qd6 f6 18.bc6+-) 17.Qd5 0-0 18.Qe5 f6 19.Bc4 Kh8 20.Qe7 Ra8 21.Bf6! gf6 (21...gf6 22.Qf6) 22.Qf6 1–0. DEFFM – KUKUGIAS, freechess.org, 2018.

8.c3 Na2 9.Qc2 Nc3 10.Nc3 (10.Bc3 Ne4+-) 10...e5 11.Nf3 Ng4 (11...Bd6 12.Be2+-) 12.Be2 (12.h3 Nf6 13.Ne5 Be6+-) 12...g6 (12...f6 13.h3 Nh6 14.0-0+-) 13.Qb3 (better 13.h3!? Nf6 14.Ne5 Bf5+-) 13...Be6 14.Qa4 Bd7? (14...Bg7+-) 15.Nd5 c6 (15...f6+-) 16.Ne5 Ne5 17.Be5 cd5 18.Bh8 Qc8 (18...Be7 19.Bf3 Bf5 20.0-0+-) 19.0-0 Bd6 20.Qd4 (20.Ra1 Qb8+-) 20...Qc7 21.Ra1 Be5 (21...Bh2 22.Kh1 Bd6+-) 22.Ra8 Ke7 23.Be5 Qc1 24.Bf1 Bb5 (24...Ke6 25.Bg7 Qb2 26.Qb2 Bc8 27.Qe5 Kd7 28.Bf6 d4 29.Qe7) 25.Qh4 Kd7 (25...g5 26.Qg5 Kd7 27.Rd8 Kc6 28.Qf6 Kc5 29.Qd6) 26.Rd8 Ke6 (26...Kc6 27.Qf6 Kc5 28.Qd6) 27.Qf6 1–0. DEFFM – Guestswe, freechess.org, 2019.

8.c3 Na2 9.Qc2 c5 10.Qa2 e5+-.

8.c3 Bg4 9.Qa4 Bf5 10.Qb4+-.

8.Bf6 ef6 9.Nf3 Bg4?? 10.c3+- Bf3 (10...c5 11.cb4 cb4 12.Be2+-) 11.gf3 (11.Qf3?! Nc2 12.Kd1 Na3+=) 11...Na2 (11...d4 12.cb4 Bb4 13.Qa4+-) 12.Qa4 Nc1 13.Kd1 1–0. Janek – Vigilante, internet, 2017.

5.b5 ab5 6.ab5 Ra1 7.Ba1 e5 8.Nf3 e4 9.Ne5 Be6 (9...Be7 10.f4=+) 10.Be2 Be7 11.f4 0-0 12.0-0 Nbd7 13.c4 (13.Bd4=+) 13...Nc5 (better 13...dc4!? 14.Nc4 Qb4=+) 14.f5+= Bd7 15.Bd4 b6 (better 15...Ra8!?+=) 16.Nc3+- Ra8 (16...c6 17.bc6 Bc6 18.Qc2+-) 17.cd5+- Nd5?? (better 17...Bc8+-) 18.Nd5 Qd5 (18...f6 19.Nb6! fe5 20.Bc5 Qc5 21.Qb3 Kh8 22.Na8+-) 19.Bc4 Qd6 (19...Qc4 20.Nc4 Bb5+-) 20.Nf7 Kf8 21.Nd6 cd6 22.Qg4 Bf6 23.Bf6 gf6 24.Qg8 Ke7 25.Qa8 Bc6 26.bc6 Na4 (26...d5 27.c7 h5 28.Qd5 Nd7 29.c8Q Ne5 30.Qde6) 27.Qa7 (27.Qb7 Ke8 28.c7 Nc3 29.c8Q) 27...Ke8 28.Qd7 Kf8 29.Qf7 1–0. DEFFM – GuestWMDL, freechess.org, 2019.

5.b5 e5 6.Nf3 Bg4 7.Be5 Qe5 8.Ne5 Bd1 9.Kd1 Bd6 10.Nf3 Ng4 11.h3?? (better is 11.Ke1+=) 11...Nf2-+ 12.Kc1 Nh1 13.c4 d4! 14.Nd4 (14.ed4 Ng3 Combination; 14.Nd4 ab5 Combination) 14...Be5 15.Ra3 0-0 16.Nf3 Bf6 17.Nc3 Be7 18.Rb3 ab5 19.Nd5 Bd6 20.ab5 Ra1 21.Rb1 Ba3 22.Kc2 Ra2 (better is 22...Rb1 23.Kb1 Ng3-+) 23.Kb3+= Rb2 24.Rb2 Bb2 25.Kb2 Nd7 26.Nc7 Rc8 27.Nd5 Kf8 28.Bd3 Nf2 29.Bf5 (worse is 29.Bh7 g6 30.Kc3 Kg7+=) 29...Ke8?? (better is 29...Rd8+/–) 30.Bd7+- Kd7 31.Nb6 Kd8 32.Nc8 Kc8 33.Ne5 (33.Ng5!? f6 34.Nh7 Kd7+-) 33...f6 34.Nf3 Nd3 35.Kc3 Nf2 36.Kd4 Kc7 37.Kd5 b6 (37...g6 38.c5+-) 38.Nd4 Kd7 (38...g5 39.Ne6 Kb7 40.Ng7+-) 39.Nf5 (better is 39.Ne6!? Nd3 40.Ng7 Kd8+-) 39...g5 40.c5 bc5 41.Nd6 Nd3 (41...Kc7 42.Ne4 Nd3 43.Nf6+-) 42.b6 Nb4 43.Kc5 Na6 (43...Nd3 44.Kd5+-) 44.Kb5 Nb8 45.Ne4 f5 (45...Ke6 46.d4 h6 47.g4+-) 46.Ng5 h5 47.Nf3 Kc8 48.Nd4 1–0. Wilke,Hans_Peter (1655) – Lippianowski,Stefan, Lichtenberger Sommer, 2015.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3 cb5 (8...e6 9.Be2=) 9.Ne5 (9.Bf6 gf6 10.Nc3 e6=) 9...Qa5 10.Bb2 e6 11.Be2 Qb4 (11...Bd6 12.0-0=) 12.Bc3 Qc5 (12...Qe4 13.Bf3 Qh4 14.Be2=) 13.Bh5 (13.Bd4 Qc7+=) 13...g6 (13...Nh5 14.Qh5 Qe7 15.Bd4=) 14.Bf3 (14.Be2 Bg7=) 14...Bg7 15.Nd3 (15.Bd4 Qe7=) 15...Qc6 16.Na3 0-0 17.0-0 Ne4 18.Bg7 Kg7 19.Ne5 Qa6 20.Be4 de4 21.Qa1 Qd6?? (better 21...f6 22.Nd7 Nd7=) 22.Nec4+- (22.Nec4 f6 23.Nd6+-) 1–0. GuestKFSK – GuestNHFD, freechess.org, 2019.

5.Nf3 e6 6.b5 ab5 7.ab5 Ra1 8.Ba1 c5 9.c4 dc4 10.Bc4 Be7 (10...Ne4 11.Qb3=) 11.0-0+= Qa5 The isolani on b5 becomes a target 12.Bc3 Qc7 13.Qb3 b6 14.Be5 Qb7 15.Qc2 0-0 16.Nc3 Ne8 (16...Bc8 17.d4+=) 17.d4 cd4 18.Bd4 Bf6 (18...Nd6 19.Bd3 f6 20.Nh4+=) 19.Bd3 h6 20.Ne5 Nc7 (20...Nd6 21.Rc1+-) 21.Be4 Qa7 22.Bh7 Kh8 23.Rb1 Qa5?? (better 23...Be5 24.Be5 Rc8+-) 24.Nc4+- (24.Nd7?! Nd7 25.Bf6 Nf6+=) 24…Qa7 1–0. DEFFM – GuestRBTZ, freechess.org, 2017.

5.Nf3 e6 6.c3 c5 7.bc5= Bc5 8.c4 dc4 (8...0-0 9.Qc2 dc4 10.Bc4=) 9.Bc4 Nc6 (9...0-0 10.0-0=) 10.0-0 0-0 (10...Bd6 11.d4=) 11.d4 Be7 (11...Bd6 12.Ba3 Nb4 13.Nc3=) 12.Nc3 (12.Ba3 Rc8=) 12...Rc8 13.Ba2 (13.Rc1 Qb6 14.Qb3 Qb3 15.Bb3 Na5=+) 13...Na5 (13...Nb4 14.Bb1=) 14.Ne5 Re8 (14...Bc6 15.Nc6 Rc6 16.d5 ed5 17.Nd5 (worse 17.Bd5 Rd6 18.e4 Ne4 19.Ne4 Rd5=+) 17...Nd5 18.Bd5+=) 15.Rc1 Nc6 (15...Bd6 16.e4=) 16.f4 Nb4 (16...Bd6 17.Qf3+=) 17.Bb3+= Nfd5 (17...Nbd5 18.Qf3+= (worse 18.Nd7 Ne3 19.Qf3 Nf1 20.Nf6 Bf6 21.Kf1 Qb6=+)) 18.Nd5 (18.Qh5 Rf8 19.Nd5 ed5+=) 18...Nd5 (18...ed5 19.Bc3 Bf5+=) 19.Bd5 (19.Qh5!? Rf8 20.Rc8 Qc8 21.e4+=) 19...ed5 20.Qb3 Bc6 21.Ba3 (21.e4 A) 21...de4 22.Qf7 Kh8 A1) 23.Nc6?! bc6 (23...Rc6? 24.d5 Rf6 25.Bf6 gf6 26.Rc4+-) 24.d5 Bf8+=; A2) 23.d5 Qb6 24.Rf2 Ba4 25.Rc8 Rc8 26.Nc6 (26.Qe7?! e3 27.Nf7 Kg8 28.Nh6 Qh6 29.Qe3 Re8=) 26...Qb2 27.Rb2 Bc5 28.Kh1 bc6 29.dc6 Bc6 30.Qc7+-; B) 21...Qa5 22.Nc6 bc6=) 21...f6 (21...Ba3 22.Qa3 Qa5 23.Nc6 bc6 24.Rfd1=) 22.Nc6 bc6 23.Bc5 Bc5 (23...Qa5 24.Be7 Re7 25.Rc3=) 24.Rc5 (worse 24.dc5 Rb8 25.Qc3 Re4-/+) 24...Qe7 25.Re1 Qc7 (25...Qe4 26.Qd1+=) 26.Kf2 (26.a5 Re7+=) 26...f5 (26...g5 27.Rec1 Qd6 28.Qd1+=) 27.Rec1 Re6? (better 27...Qd7+=) 28.Rd5!+- g6?? (28...cd5 29.Qd5 Double attack (29.Rc7 Pinning; 29.Rc7 Deflection; 29.Rc5 Decoy; 29.Rc7 Clearance)) 29.Re5 1–0. Lauko,Marian (1885) – Kral,Ladislav, Tabor op, 2007.

5.Nf3 e6 6.c3 Nc6 7.d4 b5 (7...Bd6 8.Bd3=) 8.a5 (better is 8.ab5 ab5 9.Ra8 Qa8 10.Bb5+/–) 8...Bd6= 9.Nbd2 Ne4 10.Bd3 f5 11.Qc2 Ng5 12.Ke2 Nf3 13.Nf3 e5 14.de5 Be5 15.Bf5 Bf5 16.Qf5 Qf6 17.Qf6 Bf6 18.Rab1 0-0-0 19.Rhd1 Rhe8 20.Kf1 Ne5 21.Ne5 Be5 22.Rd2 c6 23.Rbd1 Bh2 24.g3 Re6? (better is 24...Bg3!? 25.fg3 Re3+/–) 25.Kg2+- Rh6 (better is 25...Bg3 26.Kg3 Rf8+-) 26.Rh1 Bg3 27.fg3 (better is 27.Rh6 gh6 28.Kg3+-) 27...Rh1 28.Kh1 Rf8 29.Kg2 Kd7 30.e4 Ke6 31.ed5 cd5 32.Re2 Kd6 33.Bc1 h6 34.Bf4 Kd7 35.Re5 Kc6 (35...g5 36.Be3 Re8 37.Rd5 Ke6+-) 36.Re6 Kb7 37.Re7 Kc6 (37...Kc8 38.Rg7 Rf6 39.Rc7 Kd8 40.Rc5+-) 38.Rg7 (38.Rc7) 38...h5 (38...d4 39.Rg6 Kd5 40.Rd6 Kc4 41.Bh6 Ra8 42.Rd4 Kc3+-) 39.Rc7 1–0. nbh999 (2040) – Ramesh 2.0, ChessWorld.net, 2003.

5.Nf3 e6 6.c3 Bd6 7.Be2=+.

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

5.b5 ab5 6.ab5 Ra1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1).

5.Bc4 b5 6.Be2 Bb7 7.Nf3 Nc6 8.a3 e6 9.0-0 Be7 10.d4 0-0 11.Nbd2 Nd5 12.Nb3 Bd6 13.Rc1 Rc8 14.h3 f5 15.Nc5 Bc5 16.Rc5 Qf6 17.Qc2 Nce7 18.Ne5 Rfd8 (18...Ng6 19.Nc6+=) 19.Bf3 Qg5 20.Rc1 Nb4?? (better 20...Ng6 21.Nc6 Nh4+=) 21.ab4+- Nd5 22.Bc3 Rf8 23.Be1 Rf6 24.Qa2 Rh6 (24...Rd8 25.Bd2 Rd6 26.Kh2+-) 25.Kf1 (25.Bd5 Bd5 26.Rd5 Rd8 27.Rd8 Qd8 28.Qa6 Rf6+-) 25...g6 (25...Rd8+-) 26.Bd5 Bd5 27.Rd5 ed5 (27...Qe7 28.Qa6 Qe8+-) 28.Qd5 Kg7 (28...Kh8 29.Nf7 Kg7 30.Ng5 Rh4 31.Qe5 Kg8 32.Qe6 Kg7 33.Qe7 Kh8 34.Rc7 Rg8 35.Qh7 Rh7 36.Rh7) 29.Nf7 (29.Qd7 Qe7 30.Qe7 Kg8 31.Qf7 Kh8 32.Rc7 Rg8 33.Qf6 Rg7 34.Qg7) 29...Qe7+- 30.Nh6 Kh6 31.Qe5 (better 31.Qb7!? Qd7+-) 31...Qf7 (31...Qe5 32.de5 c6+-) 32.Qf4 (32.Qf4 Kg7 33.Rc6+-) 1-0. jhonores (2210) - Hayderserfa (2160), Rated Blitz game, lichess.org, 2020.

5.Bc4 b5 6.Be2 Bb7 7.Nf3 e6 8.a3 c5 9.bc5 Bc5 10.0-0 0-0 11.h3 Nbd7 12.Ne5? (better is 12.d4!? Bd6 13.a4+=) 12...Ne5-+ 13.Be5 (better is 13.d4 Qd5 14.f3-+) 13...Qd5 14.Bf3 Qe5 15.d4 Bf3 16.de5? (16.Qf3 Bd4! 17.ed4 Qd4 18.Nc3-+) 16...Bd1 17.Rd1 Nd5 18.Kf1 Rfd8 19.Rc1 Rac8 20.Nd2 (20.Ke2 Be7 21.Rc8 Rc8-+) 20...Ne3! 21.Ke2 (21.fe3 Rd3 Double attack (21...Rd2 Discovered attack; 21...Rd3 Decoy)) 21...Ng2 22.Ne4 Bb6 23.Nd6 Bd4 (better is 23...Rc1!? 24.Rc1 Nf4 25.Kf1-+) 24.Rc8 Rc8 25.Rd1 Rc2 26.Kd3 (26.Kf3 Nh4 27.Kg4 Be5 28.Kh4 Rf2 29.Nc4 Rf4 30.Kg3 Rc4 31.Kf2-+) 26...Rc3 (better is 26...Rc5 27.Ne4 Rd5-+) 27.Kd4 Ra3 28.Kc5 Kf8 29.h4 (29.Kb4 Ra4 30.Kb3 f6-+) 29...h6 (29...Nh4 30.Kb4 Ra4 31.Kb3-+) 30.Kc6 (30.Rc1-+) 30...Nh4 31.Nb7 g5 32.Rd8 Kg7 33.Nd6 (33.Nc5 Nf3 34.Kb6 b4-+) 33...Nf3 34.Ne8 Kg6 35.Kb6 Ne5 36.Nc7 Nc4 (36...b4 37.Kc5 Rc3 38.Kb6-+) 37.Kb7 (37.Kc5 Nb2 38.Kb6 b4 39.Na6 b3-+) 37...b4 38.Na6 (38.Rg8 Kf6 39.Rh8 b3 40.Rh6 Kf5-+) 38...b3 39.Rd1 b2 40.Rb1 Ra1 41.Rb2 Nb2 0–1. Wiedermann,Jan (1740) – Sroubova,Lenka, Karlovy Vary op, 2009.

5.Bc4 e6 6.Nf3 Nc6 7.a3 Be7 8.0-0 (8.d4 0-0=) 8...0-0+= 9.d3 (9.d4 Bd7=) 9...b5 10.Bb3 Bb7 (10...a5 11.Qc2 Ra6 12.ba5 Na5 13.Nc3 Nb3 14.Qb3=) 11.Nc3 Qd7 12.Qe2 Rad8 (12...Rfd8 13.Rfd1=) 13.Rad1 Bd6 (13...a5 14.Nb5 ab4 15.ab4 Nb4 16.Bc4+=) 14.e4 (14.d4 Nd5+=) 14...Bf4 (14...e5 15.Nd5+=) 15.Qc2 (15.d4 Rfe8+=) 15...Qd6 (15...Ne5 16.Ne1=) 16.Ne2 (better 16.d4 Qe7 17.Rfe1+=) 16...Bh6? (better 16...Ne5 17.Be5 Be5+=) 17.e5+- Ne5 18.Be5 Qc6 (18...Qd7 19.Ned4+- (worse 19.Bc7 Rc8-/+)) 19.Qc6 Bc6 20.Bc7 (20.Nfd4 Bd5+-) 20...Rc8 21.Be5 Nd5 (21...Nd7 22.Ned4+-) 22.Bb2 (22.Rfe1 Rfd8+-) 22...Bb7 (22...Nf4 23.Nfd4 Bd5 24.Nf4 Bb3 25.Nb3 Bf4 26.Nc5+-) 23.Ne5 Rc7 (23...Rfd8 24.Ng4 Bg5 25.f4+-) 24.Bc1 (24.Ng4 Bg5+-) 24...Bc1 (24...Nc3 25.Nc3 Rc3 26.Bh6 Rb3 27.Bc1+-) 25.Rc1 (25.Nc1?! Nf4 26.f3 Rfc8+-) 25...Rfc8 26.Rc7 Rc7 27.Rc1 (27.Bd5 ed5 28.Re1 f6+-) 27...Rc1 28.Nc1 Nf4 (28...Nb6 29.d4+-) 29.g3 Nd5 30.Bd5 Bd5 31.Nd7 Bc6 (31...g5 32.f4 gf4 33.gf4+-) 32.Nc5 Kf8 33.Na6 h5 (33...Ke7 34.Nb3+-) 34.Ne2 g5 (34...Ke7 35.Nc5+-) 35.Nd4 Bd5 (35...Bd7 36.f4 Ke7 37.Nc7 gf4 38.gf4+-) 36.Nc7 1–0. Hal1958 – Goathed, playchess.de, 2005.

5.Qb3 Bf5 6.Nf3 e6 7.Be2 Bd6 (7...dc4 8.Qc4 Nbd7 9.0-0=) 8.Be5 (8.c5 Bc7=) 8...0-0 9.0-0 Bg4 10.Bd6 Qd6 11.d4 Nbd7 12.h3 Bh5 13.Nc3 Ne4 14.c5 Qe7 15.Rfe1 f5 16.Ne4 fe4 17.Ne5 (17.Nd2!? Qh4 18.Bh5 Qf2 19.Kh1 Qd2 20.Be2=+) 17...Ne5 18.Bh5 (18.de5 Qg5-/+) 18...Nd3 19.Re2 (better is 19.Rf1 Qh4 20.Qd1 Nf2 21.Qe2-+) 19...Qh4-+ 20.Bg4 Rf2 21.Be6 (21.Qd3 Rg2!! (21...ed3?! 22.Rf2 Qh6 23.Re1-+) 22.Rg2 ed3-+) 21...Kh8 22.Qc2 (22.Rf2 Qf2 23.Kh2 Qe3 24.Rb1-+) 22…Raf8 (23.Bd5 cd5 24.Rf2 Rf2-+; 22...Nb4?! 23.Qd2 Re2 24.Qe2-/+) 0–1. Basel,Karem – Adnani,Moklis, Arab–ch U18 Beirut, 2000.

6.a3 A) 6...Nc6 7.Bf6 (7.Nf3 Bg4 8.Be2 e6 9.0-0 Bd6 10.h3 Bf3 11.Bf3 0-0=; 7.Be2 e5 8.Nf3 Bd6 9.d4 e4 10.Ne5 Qc7 11.Nc6 bc6=; 7.b5 ab5 8.Bb5 e6 9.Nf3 Bd6 10.0-0 0-0 11.Qe2 Bd7+=) 7...ef6 8.d4 Bf5 9.Bd3 Bd3 10.Qd3 Rc8 11.Nc3 Qd6+=; B) 6...Nbd7 7.d4 (7.Nf3 e6 8.Be2 Bd6 9.0-0 0-0 10.Nc3 Qe7 11.Qb3 b5=) 7...e6 8.Bd3 Bd6 9.Nf3 a5 10.b5 0-0 11.0-0 Qe7=; C) 6...e6 7.Nc3 (7.Be2 Bd6 8.Nf3 0-0 9.0-0 Nc6 10.Nc3 e5 11.d4 e4+=; 7.Bd3 Bd6 8.Nf3 Nc6 9.0-0 e5 10.Be2 Qc7 11.Ne1 Be6+=; 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Nc6 10.Nc3 e5 11.d4 e4+=) 7...Bd6 8.Rc1 0-0 9.Nf3 e5 10.Qb3 Bc7 11.Qa4 Bd7=.

6.Be2 A) 6...Bf5 7.Nf3 (7.a3 Nc6 8.Nf3 Qd6 9.0-0 Rc8 10.b5 ab5 11.Bb5 Bg4=; 7.b5 e6 8.Nf3 Bd6 9.ba6 Na6 10.Bb5 Kf8 11.0-0 Kg8=; 7.Bf6 ef6 8.a3 Nc6 9.d4 Rc8 10.Nf3 Bd6 11.Qb3 a5=) 7...Nc6 8.a3 Qd6 9.0-0 Rc8 10.b5 ab5 11.Bb5 Bg4=; B) 6...Nc6 7.b5 (7.a3 e5 8.Nf3 Bd6 9.0-0 0-0 10.d4 e4 11.Ne5 Qc7+=; 7.Bf6 gf6 8.a3 Rg8 9.g3 e5 10.d4 Be6 11.Nc3 Rc8+=) 7...ab5 8.Bb5 e6 9.Nf3 Bd6 10.0-0 0-0 11.Qe2 Bd7=; C) 6...e6 7.a3 Bd6 8.Nf3 0-0 9.0-0 Nc6 10.Nc3 e5 11.d4 e4+=.

6.Nf3 Qd6 7.Qa4 (7.Qb3 Bf5 8.Be5 Qe6 9.Nc3 Nc6 10.d4 Qd7 11.Bf6 ef6+=; 7.a3 Nc6 8.b5 ab5 9.Bb5 Bg4 10.d3 Ra5 11.a4 Nd7=; 7.b5 Nbd7 8.Be2 e5 9.ba6 ba6 10.Ba3 Qe6 11.Bf8 Rf8=) 7...Bd7 8.b5 Ne4 9.Nc3 Nf6 10.Ba3 Qb6 11.d4 Qe6 +=.

6.Nf3 Nc6 7.a3 (7.b5 ab5 8.Bb5 Bg4 9.h3 Bd7 10.Bf6 gf6 11.Nc3 e6=) 7...Qb6 (7...Bf5 8.b5 (8.Be2= Qd6 9.0-0 Rc8 10.b5 ab5 11.Bb5 Bg4=) 8...ab5 9.Bb5 Ne4 10.0-0 Nd6 11.Bc6 bc6=; 7...Bg4 8.Be2 e6 9.0-0 Bd6 10.h3 Bf3 11.Bf3 Rc8=) 8.Bf6 (8.Be2 Bf5 9.Bf6 gf6 10.Nc3 e6 11.d4 Bd6=) 8...ef6 9.d4 Bd6 10.Be2 (10.Bd3 Be6 11.Nc3 Rc8+=) 10...0-0 (10...Be6 11.Nc3 Rc8=) 11.0-0 (11.Nc3 Be6=) 11...Bf5 (11...Be6=) 12.Nc3 Rac8 13.Nd5 Qd8 14.Nf4 g5 (14...Bf4 15.ef4 Qd6 16.Re1=) 15.Nd3+/– a5 16.Nc5 Bc5? (better is 16...ab4!? 17.Nb7 Qe7 18.Nd6 Qd6+/–) 17.bc5+- (17.dc5?! ab4 18.ab4 Qd1 19.Rfd1 Nb4+=) 17...Qd5 18.Nd2 Bg6 (18...Rfd8 19.Nc4 Rc7 20.Qd2+-) 19.Bf3 Qd7 20.Nc4 Rb8 21.Nb6 Qd8 22.Qa4 Bd3 (22...Kg7 23.Bc6 bc6 24.Qc6+-) 23.Rfd1 Ba6 24.Bc6 bc6 25.Qc6 Bb7 26.Qd7 Qe8 (26...Be4 27.d5+-) 27.Qe8 Rfe8 (27...Rbe8 28.Nd7 Rd8 29.Nf8 Kf8 30.Rab1+-) 28.Nd7 Rbd8 (28...Be4 29.Nf6 Kf8 30.d5+-) 29.Nf6 Kf8 30.Ne8 Ke8 31.Rab1 (31.Rab1 Be4 32.Rb5+-) 1–0. pzn2pawn (1855) – Donidon (1945), redhotpawn.com, 2016.

6.Nf3 e6 7.Qa4 (7.a3 Bd6 8.Be2 0-0 9.0-0 Nc6 10.Nc3 e5 11.d3 Bg4=) 7...Bd7 8.b5 Bd6 9.Be2 0-0 10.0-0 Qe7 11.Be5 Ne4 =.

6.Nf3 Bg4 7.h3 (7.Be2 e6 8.a3 Bd6 9.0-0 0-0 10.Nc3 Nc6 11.h3 Bf3=; 7.a3 e6 8.h3 Bh5 9.g4 Bg6 10.Ne5 Nbd7 11.Ng6 hg6=; 7.b5 e6 8.Nc3 Bd6 9.ba6 Na6 10.Bb5 Nd7 11.h3 Bh5=) 7...Bh5 8.g4 Bg6 9.Ne5 Qd6 10.Qa4 Nbd7 11.g5 Ng8 +=.

6.Bf6 A) 6...ef6 7.a3 (7.Qa4 Bd7 8.b5 Bc5 9.Nc3 d4 10.Ne4 Qe7 11.Nc5 Qc5=; 7.Qb3 Nc6 8.a3 Be6 9.d4 Rc8 10.Nc3 Bd6 11.Nf3 a5=) 7...Bd6 8.Qf3 Be6 9.Nc3 d4 10.ed4 Qe7 11.Qe3 Nd7=; B) 6...gf6 7.Nf3 (7.a3 e5 8.d4 Nc6 9.Nc3 Be6 10.Nf3 Rc8 11.Qb3 Bd6=; 7.d4 e5 8.a3 Nc6 9.Nc3 Be6 10.Nf3 Rc8 11.Qb3 Bd6=; 7.Nc3 Nc6 8.a3 e5 9.d4 Be6 10.Nf3 Rc8 11.Qb3 Bd6=) 7...e5 8.a3 Nc6 9.d4 Bg4 10.Nc3 ed4 11.ed4 Rc8=.

5.c5 Nc6 6.a3 (6.Nf3 Bg4=+) 6...Bf5 (6...Be7 7.Nf3 e4 8.Ne5=+) 7.Nf3 Bg4 (7...e4 8.Nd4 Nd4 9.Bd4=) 8.Be2 (8.h3 Bf3 9.Qf3 Qd7=) 8...Bf3 (8...e4 9.Ne5 Be2 10.Qe2 Ne5 11.Be5=) 9.Bf3= e4 10.Be2 Be7 (10...d4 11.ed4 Nd4 12.0-0=) 11.d3+= Qd7 (11...0-0 12.0-0+=) 12.de4 Ne4 (12...de4 13.Qd7 Nd7 14.Nc3+/–) 13.0-0 (13.Bg4 f5 14.Bh5 Kf8+=) 13...Bf6+= 14.Bf6 gf6 (14...Nf6 15.Re1+=) 15.Bg4 (15.f3 Ng5+=) 15...f5+= 16.Bf3 (16.Be2 d4+=) 16...0-0-0= 17.Nd2 (17.Qe2 d4=) 17...Rdg8 (17...Rhe8 18.Qc2=) 18.Nb3+= f6 (18...Ne5 19.Rc1+=) 19.Kh1 (19.Re1 Rg7+=) 19...Ne5 20.Be2 (20.Rc1 c6+=) 20...Qg7 (20...Rg2 21.Kg2 Rg8 22.Kh1=) 21.g3 h5 (better is 21...Nc3 22.Qd2 Ne2 23.Qe2 Qg4=) 22.Bh5?? (22.Qd5 h4 23.Na5=+) 22...Nc3 23.Qc2 Rh5 24.Qc3 (24.Nd4 Rgh8 25.f3 Qg3 26.Rf2-+) 24…Qg4 (25.Qe5 fe5-+; 24...Nf3 25.h4 Rh4 26.Kg2 Rh2 27.Kf3 Qg4) 0–1. uno (1860) – METHUSALAH (1990), ICC, 2003.

5.Be5 Nc6 6.Bc3 Bb4 7.Bb4 Nb4 8.Qa4 Nc6 =+.

5.Be5 Nc6 6.Bc3 Nb4 7.Bb4 Bb4 8.Qa4 b5 9.Qb4 dc4 10.a4 +-.

5.cd5 Nd5 (5...ed5 6.a3+=) 6.a3= Nd7 7.Nf3 Bd6 (better is 7...N7f6!?=) 8.Bg7+/– Rg8 9.Bb2 N7b6 10.Nc3 Bd7 11.g3 (11.Ne4 Ba4 12.Qe2 a5+/–) 11...Qe7 (11...Nc3 12.Bc3 Bc6 13.Bg2+/–) 12.Qc2 f5 13.Nd5 Nd5 14.Bc4 (14.Nd4 Qf7+/–) 14...Bc6 15.Nd4 (15.Be2 Qd7+/–) 15...Ne3 (15...Nb4 16.ab4 Bh1 17.Be6=) 16.de3 Bh1 17.Be6 Be4 (17...Rg6 18.Qb3+=) 18.Qb3 Rf8 (18...Rg6!?+=) 19.f3+/– Bc6 20.Nf5 Qg5 21.Ng7 (21.e4 Rd8 22.Ng7 Ke7+/–) 21...Ke7 22.Bg4 (22.f4 Qg6 23.Qc3 Rf6 24.Qf6 Qf6 25.Bf6 Kf6+=) 22...Bd5 23.Qc3?? (23.Qd3 Be5 24.Be5 Qe5+/–) 23...Rf7?? (better is 23...Bf3 24.Bf3 Rf3-+) 24.0-0-0 Rg8 (24...Rf3 25.Bf3 Bf3 26.Rd6 Kd6 27.Qc7 Kc7 28.Ne6 Kd6 29.Ng5=) 25.Nf5 (25.Qd3 Rgg7 26.Bg7 Qg7 27.Qd5 Qa1 28.Kc2 Qa3+/–) 25...Rf5+= 26.Bf5 Qf5 27.e4 Qg5 28.f4 (better is 28.Rd2!? Bc6 29.e5+=) 28...Bf4+= 29.gf4 Qf4 30.Kb1 (30.Qd2 Qd2 31.Kd2 Rg2 32.Kc3 Bc6+= (worse is 32...Be4 33.Re1+/–)) 30...Be4 31.Ka1 c6?? (better is 31...Rg6!?+=) 32.Qd4 (better is 32.Qc5 Ke8 33.Qd4+-) 32...Qf5 33.Qd6 Kf7 34.Qd4 (34.Qc7 Kg6+=) 34...Bd5= 35.Re1 (35.Qa7 Qd7 36.Qf2 Ke8 37.Re1 Kd8+/–) 35...Rg4 (35...Rg2 36.Qe3 Kg6 37.h3+=) 36.Qc5 (better is 36.Qb6!?+=) 36...Re4+= 37.Rg1 Rg4 (37...Ke6 38.Qa7+=) 38.Re1= Re4 39.Rg1 Rg4 (39...Ke6!?+=) 40.Re1= ½–½. zabazaba (1645) – snjoomann (1625), gameknot.com, 2014.

5.Nf3 Be7 6.a3 0-0 7.Qb3 dc4 8.Bc4 b5 9.Be2 Bb7 10.0-0 c5 11.d3 (11.bc5 Bc5 12.Rc1 Bd6=) 11...Nbd7 (11...cb4 12.ab4 Nd5 13.Rc1-/+) 12.Nc3=+ cb4 13.ab4 Nd5 14.Rfc1 (better 14.Nd5!? Bd5 15.Qc3=) 14...Nb4-/+ 15.Ba3 Nd5 16.Nd5 Bd5 17.Qc2 Ba3 18.Ra3 b4 19.Ra4 b3 20.Qb2 f5 21.Rca1 a5 22.Nd4 Nc5 23.R4a3 a4 24.Nf3 Bf3 25.Bf3 Nd3 26.Qb1 (26.Qe2 Rc8 27.Rd1-+) 26...Rc8 27.Ra4 (27.Qd1 b2 28.Rb1-+) 27...Rc1 (27...b2 28.Qf1 Rc1 29.Rc1 bc1Q-+ (29...bc1B?! 30.Rd4 Qf6 31.Qd3=; worse 29...bc1R 30.Rd4 Rf1 31.Kf1-+; worse 29...Nc1 30.Rb4 Qd2 31.Rb6-+; 29...bc1N?! 30.Rd4 Qb6 31.Rd3 Nd3 32.Qd3-+)) 28.Qc1 Nc1 29.Rc1 b2 30.Rb1 Qd2 31.Rd4 Qc1 (31...Qd4! 32.ed4 Rc8 33.Rf1-+) 32.Rd1 Rc8 33.Be2 (33.g4 Qb1! 34.Rb1 Rc1 35.Kg2 Rb1-+) 33...Qb1! 34.Rb1 Rc1 (34...Rc1 35.Rc1 bc1Q (35...bc1N? 36.Bc4+-; 35...bc1B?! 36.Kf1=) 36.Bf1 Kf7-+) 0–1. moss42 (1875) – AB_Normal (2035), ChessWorld.net, 2013.

5.Qa4 Bd7 6.Qc2 e6 7.c5 Nc6 8.a3 b5 (8...e5!?+=) 9.Nf3= Be7 10.Be2 0-0 11.0-0 a5 12.Bb5 (12.Qb3 Na7+=) 12...ab4?? (better is 12...Nb4 13.ab4 Bb5+=) 13.ab4?? (better is 13.Bc6!? Bc6 14.ab4 Ra1 15.Ba1+=) 13...Ra1?? (better is 13...Nb4 14.Qc3 Bb5 15.Qb4 Bf1 16.Kf1 Ra1 17.Ba1 Qb8 18.Qb8 Rb8-+) 14.Ba1+= Nb4 15.Qa4 Bb5 (15...Bc5? 16.Bf6 Qf6 17.Bd7+-) 16.Qb5 Nd3?? (better is 16...Qb8 17.Qe2 Bc5 18.Bf6 gf6+=) 17.Bf6+- Bf6 18.Qd3 c6 19.Qa6 Qc7 20.d4 h6 21.Nc3 Rb8 22.Na4 g5 23.Nb6 g4 24.Nd2 e5 25.Nb3 h5 26.g3 e4 27.Nc1 h4 28.Ne2 h3 29.Ra1 Rb7 30.Qa8 Kg7 31.Qc8 Qc8 32.Nc8 Rb5 33.Na7 Rc5 34.dc5 Ba1 35.Nc6 Kf6 36.Ncd4 Ke5 37.Kf1 f5 38.c6 Kd6 39.Ke1 Bb2 40.Kd2 Ba3 41.Nb5 Kc6 42.Ned4 Kc5 43.Na3 Kb4 44.Nac2 (44.Nac2 Kc4 45.Nf5+-) 1–0. Hal1958 – SMLooking, playchess.de, 2005.

5.Qc2 Nbd7 6.cd5 (6.f3 Be6=) 6...Nd5=+ 7.a3 e6 8.Nc3 N7f6 9.Bd3 Be7 10.Nge2 Rc8 11.b5 ab5 12.Nd5 (12.f3!? Bf5 13.e4 Nc3 14.Nc3=) 12...Qd5-/+ (< 12...Nd5 13.Bg7 Rg8 14.Bb5 c6 15.Qh7+-; 12...ed5?! 13.Bb5 c6 14.Bd3=) 13.Nf4 Qc6 (13...Qd7 14.h3 Bf5 15.Bf5 ef5 16.0-0=+) 14.Rc1 (better is 14.Qc6!? bc6 15.h3=) 14...Qc2-/+ 15.Rc2 c6 16.Bb5 e5 17.Bc6? (17.Be5 cb5) 17...Rc6-+ 18.Rc6 bc6 19.Be5 0-0 20.a4 Ra8-+ 21.0-0 Ra4 22.h3 Bf5 23.Rc1 c5 24.Bf6 Bf6 25.Rc5 Be6 (26.d4 Ra1 27.Kh2 g5 28.Ne6 fe6-/+) 0–1. Gross,Wilhelm – Merten,Rainer, GER theme m Germany, 1988.

5.Nf3 Nbd7 6.cd5 Nd5 7.a3 e6 8.Bc4 N5f6 9.d4 Be7 10.Nbd2 0-0 11.0-0 Nb6 12.h3 (12.Bd3!?+=) 12...Nc4= 13.Nc4 Bh5 14.Nce5 Ne4 15.Qd3 (15.Qc2 Nd6=) 15...Qd5=+ 16.g4 Bg6 17.Ng6 hg6 18.Rac1 (18.Ne5 Bd6 19.Qc4 Rfe8=) 18...Rac8 (18...c5 19.bc5 Nc5 20.Qe2=+) 19.h4 (19.Ne5 a5=) 19...Nd6 (19...c5 20.bc5 Nc5 21.Qd1-/+) 20.Qe2 f5 (20...b5 21.Rfd1=) 21.g5 (21.Ne5 Kh7+= (21...Bh4? 22.Ng6 Bd8 23.Rc5+-)) 21...f4 (21...Qe4=) 22.ef4?? (better is 22.Rc5 Qa2 23.Qc2 fe3 24.Ra1 Qa1 25.Ba1 Rf3 26.fe3 Re3 27.Qg6+/–) 22...Rf4-+ 23.Ne5 Rh4 24.f3 Bg5 (24...Nf7 25.Ng6 Qg5 26.Qg2-/+) 25.Ng6?? (better is 25.Rc5 Qb3 26.Ng6 Be3 27.Kg2+=) 25...Rh6-/+ (25...Rd4?! 26.Rc5 Rd2 27.Qe1 Rb2 28.Rd5 ed5 29.Qe5+=) 26.Rc5 Rg6 27.Rd5 ed5 28.Rf2 Re8 29.Qd3 Re1 30.Kg2? (30.Rf1 Ree6 31.Rf2 Nc4-+) 30...Kf7 (better is 30...Ne4 31.fe4 Bh4 32.Kh2 Bf2-+) 31.f4?? (better is 31.Re2 Re2 32.Qe2 Bf4 33.Kh1 Rh6 34.Kg1-+) 31…Bh4 (32.Qg6 Kg6-+) 0–1. Gross,Wilhelm – Merten,Rainer, xii/25, 1985.

4.Nf3 (--> 3.Nf3 a6 4.e3).

4.Nf3 e6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.Bb5 Bd7 5.Be2 Nc6 6.a3 a5 7.b5 Na7 8.a4 c6 9.Nf3 (9.Na3!?+-) 9...cb5+= 10.ab5 Bb5 (10...Nb5 11.Ne5+=) 11.0-0 Be2 12.Qe2 e6 13.d3 (13.Bf6!? gf6 14.e4+-) 13...Bb4 14.Nbd2 0-0 15.Bd4 (15.Rfc1 Nc6 16.c4 Qd7+=) 15...Bd2 (15...Nc6!?=+) 16.Nd2 Nc6 17.Bb2 Qb6 (17...a4 18.Rfc1=) 18.Rfb1 (18.Bf6 gf6 19.Rfb1 Qc7+-) 18...Qc7 19.Bf6 gf6 20.d4 Ne7 21.c4 dc4 (21...a4 22.h3+=) 22.Qc4 (22.Nc4!? Rfb8 23.Rc1+-) 22...Rfc8+= 23.Qc7 Rc7 24.Rc1 (24.Ne4!? Kg7 25.Kf1=) 24...Rc1=+ 25.Rc1 a4 26.Ra1 Nd5 27.f4? (better 27.Nc4=) 27...Ne3-+ 28.Kf2 Ng4 (better 28...Nc2!? 29.Ra2 Nd4-+) 29.Kf3 Nh2 (better 29...f5 30.h3 Nf6-/+) 30.Kg3+= e5 (30...a3!?+=) 31.fe5 fe5 32.de5 (worse 32.Kh2 ed4 33.Kg3 a3+=) 32...Re8? (better 32...Rd8 33.Ne4 Rd4 34.Nf6 Kg7 35.Kh2 Kg6+-) 33.Kh2+- Re5 34.Ra4 h5 35.Kh3 Kg7 36.Ra6 f5 (36...f6+-) 37.Nf3 Re3 38.Kg3 Re4 39.Nh4 f4 (39...Rg4 40.Kh3 Rg5 41.g3+-) 40.Kf3 Rb4 41.g3 (better 41.Ng6+-) 41...fg3= 42.Kg3 Rb3 43.Kf4 Rb8 44.Ra5 Rb4 45.Kg5 Rh4?? (better 45...Kf7=) 46.Kh4 (46.Ra7 Kg8 47.Kh4 Kf8 48.Kh5 Kg8 49.Kg5 Kf8 50.Kf4 Ke8 51.Ke5 Kd8 52.Kd6 Ke8 53.Rb7 Kf8 54.Ke6 Kg8 55.Kf6 Kh8 56.Kg6 Kg8 57.Rb8) 46...Kh6 (46...Kf6+-) 47.Ra6 (47.Rg5 Kh7 48.Kh5 Kh8 49.Kg6 Kg8 50.Rf5 Kh8 51.Rf8) 47...Kg7 (47...Kh7 48.Kh5 Kg7 49.Kg4 Kf8 50.Ra7 Ke8 51.Kf5 Kd8 52.Ke5 Ke8 53.Kd6 Kf8 54.Ke6 Kg8 55.Kf6 Kh8 56.Kg6 Kg8 57.Ra8) 48.Kh5 Kh8 (48...Kf7 49.Kg5 Ke7 50.Kf4 Kf7 51.Ke5 Kg7 52.Rf6 Kg8 53.Ke4 Kg7 54.Kf5 Kh7 55.Rf7 Kh8 56.Kg6 Kg8 57.Rf1 Kh8 58.Rf8) 49.Kg6 Kg8 50.Ra8 1–0. Darkseid (1775) – newport county afc, ChessWorld.net, 2011.

4.Bb5 Nfd7 5.a3 a6 6.Be2 Nc6 7.Nf3 Nf6 (7...e5 8.c4 dc4 9.Bc4+-) 8.c4 e6 9.b5 (9.cd5 ed5 10.Qc2 Bd7+-) 9...Na5 10.cd5 ed5 11.ba6 1–0. GuestRQKK – GuestJFXW, freechess.org, 2017.

4.d3 e5 5.a3 Bd6 6.Nf3 e4 (6...a5!?=) 7.de4+= Ne4 (better is 7...de4 8.Ng5 h6 9.Bb5 c6 10.Bf6 gf6 11.Ne4 Be5 12.Qd8 Kd8 13.Bc6 Nc6+=) 8.Qd5?? (better is 8.Bb5 c6 9.Bd3+/–) 8...Nf2 (better is 8...Bb4 9.ab4 Qd5 10.Bg7 Rg8-+) 9.Kf2 (better is 9.Qa8 Nh1 10.Qb8 0-0 11.Qa7 Bh2 12.Bb5 Bg3 13.Ke2 Bd6+-) 9...c6?? (better is 9...Bg3! 10.hg3 Qd5 11.Bg7 Rg8-/+) 10.Qd3 (10.Qe4 Qe7 11.Qe7 Be7 12.Bg7 Rg8+-) 10...0-0 11.Be2 a5 12.Re1 a4 13.Kg1 c5 14.Bc3 c4 15.Qd1 Bg4 16.Rf1 Nc6 17.Nd4 Be2 18.Qe2 Re8 19.Nc6 Qc8 20.Nd4 Ra7 21.Nf5 Bb8 22.Ng7 Be5 23.Ne8 Qe8 24.Be5 Qe5 25.Nd2 Qb2 26.Ne4 Re7 27.c3 Qe2-/+ (27...Qe2 28.Nf6 Kg7-/+) 0–1. Valpa – Sweendog, playchess.de, 2006.

4.Nf3 e6!? =.

4.Nf3 Bg4 5.Bb5+/– c6 6.Be2 (6.Ba4 e6 7.a3 a5+/–) 6...h5 (6...e6 7.a3+/–) 7.h3 (7.Nc3 Qc7+/–) 7...Bf3 8.Bf3 Nbd7 9.0-0 (9.Nc3 e6 10.a3 a5+/–) 9...h4 (9...e5 10.a3+/–) 10.a3 (10.Bf6 Nf6 11.c4 e5+-) 10...e5 11.c4! e4 (11...dc4 12.Bc6 Pinning (12.Bc6 Deflection)) 12.Be2+- dc4 (12...a5 13.ba5 Bd6 14.d3+-) 13.Bc4 Ne5?? (better is 13...a5+-) 14.Be5 Bd6 15.Bd4 (better is 15.d4 ed3 16.Bd4 a5+-) 15...Nd5 (15...a5 16.f3 ab4 17.fe4+-) 16.Bg7 (better is 16.Qg4!? Qe7 17.Qg7 Rf8+-) 16...Rg8 17.Qa4 Rg7 (17...Qd7 18.Bd5 cd5 19.Qd7 Kd7+-) 18.Qc6 Ke7 (18...Kf8 19.Qd5 Rc8 20.Qe4+-) 19.Qd5 Qg8 (19...Rc8+-) 20.Qe4 Kd7 21.Bb5 Kc7 22.Qc6 Kb8 23.Qd6 Kb7 24.Ba6 1–0. Bonetti,Shane – guest1382, ICC, 2002.

5.Ba4 e6 +/–.

5.Be2 Ba6 6.a4 Be2+= 7.Qe2 Qb6 (7...e6 8.b5+-) 8.b5 Nbd7 9.Nf3 a6 10.Bd4 Qc7 11.0-0 (better 11.bc6 Qc6 12.Nc3+-) 11...e5 (better 11...ab5!? 12.ab5 Ra1 13.Ba1 e6+-) 12.bc6+- Qc6 13.Ne5 (13.Be5?! Ne5 14.Ne5 Qc2+-) 13...Qc2 14.Nd7 Nd7 15.Qh5 Qe4 (15...Rd8 16.Qd5 Qg6 17.Rc1+-) 16.Nc3 g6 (16...Qg6 17.Qg6 hg6 18.Nd5 Bd6+-) 17.Qh3 (17.Qh3 Qe6 18.Bh8 Qh3 19.gh3+-) 1–0. GuestYZCL – GuestMCMX, freechess.org, 2018.

5.Be2 Nbd7 6.Nf3 e6 7.b5 c5 (7...cb5 8.Bb5 Rb8 9.a4+=) 8.c4 Bb7 9.a4 dc4 10.Bc4 Bf3 (10...Bd6 11.d3+-) 11.Qf3 Nb6 12.Be2 Be7 13.Qc6 Nfd7 (13...Nbd7!?+-) 14.Bg7+- Rg8 15.Bb2 Nd5 16.Bf3 (better 16.0-0+-) 16...Nb4?? (better 16...Rc8 17.Bd5 Rc6 18.Bc6 Bf6 19.Bf6 Qf6+-) 17.Qe4 (better 17.Qa8 Nd3 18.Kd1 Qa8 19.Ba8 Nb2 20.Kc2 Nc4+-) 17...Rc8 18.Qh7 Nf6?? (18...Rf8+-) 19.Bf6 Bf6 20.Qg8 Ke7 21.Qd8 Rd8 22.0-0 (better 22.Ra3 Bb2 23.b6 ab6 24.Rb3+-) 22...Ba1 23.Nc3 Bb2 24.Ne4 c4 25.Rb1 Nd3 26.a5 f5 27.Nc3 (better 27.Ng3+-) 27...Rb8?? (27...Bc1 28.Ne2 Bd2 29.Nd4+-) 28.Bc6 (better 28.b6!? a6 29.Be2 Ba3+-) 28...Ba3 (28...Bc1 29.b6 a6 30.Nd5 ed5 31.Bd5 Bd2 32.Bc4+-) 29.b6 ab6 (29...a6 30.Kf1+-) 30.Rb6 (30.a6 Rg8+-) 30...Rc8 31.a6 Bc5 32.Rb7 Kf6 33.Bf3 (33.Bb5!? Ne5+-) 33...Ra8 34.Rf7! Kf7 35.Ba8 Nb4 36.Bb7 Ke7 (36...Nd3 37.Bc6+-) 37.h3 (37.Na4 Ba7 38.Nb2 Nd3 39.Nc4 Bc5+-) 37...Kd7 (37...Nd3 38.h4+-) 38.g4 (38.Na4!? Ba7+-) 38...fg4 39.hg4 Nc6 40.f4 Na7 41.f5 ef5 42.gf5 Ke7 (42...Nc6 43.Bc6 Kc6 44.f6+-) 43.Nd5 (better 43.Ne4!? Bd6+-) 43...Kf7 (43...Kd6 44.Kf2+-) 44.Kg2 Nb5 45.e4 Nd6 46.e5 (better 46.Kf3 Kf8+-) 46...Nf5 47.Nc7 (47.Nf4 Ne7+-) 47...Nd4 (47...Nh4 48.Kg3 Ng6 49.Kg4 Ne5 50.Kf5+-) 48.e6! Ne6?? (48...Ke7+-) 49.Bd5 Ke7 50.Ne6 Bb4 (50...Bb6+-) 51.a7 Bd2 52.a8Q c3 (52...Ba5 53.Qa7 Kd6 54.Qc5 Kd7 55.Nf8 Ke8 56.Qc8 Ke7 57.Qe6 Kf8 58.Qf7) 53.Qc6 (53.Qf8 Kd7 54.Qd8) 53...Kf6 54.Nd4 Kg5 55.Nc2 (55.Nf3 Kh5 56.Kh3 c2 57.Bf7) 55...Kf5 (55...Be1 56.Ne1 Kf5 57.Nf3 c2 58.Qe6 Kf4 59.Qe4) 56.Qe6 (56.Qd7 Kg6 57.Qf7 Kg5 58.Qg7 Kh4 59.Qg3 Kh5 60.Bf7 Kh6 61.Qg6) 56...Kg5 57.Kf3 Kh5 (57...Be3 58.Be4 Bd2 59.Qf5 Kh4 60.Qg4) 58.Qf6 Be1 (58...Bg5 59.Bf7 Kh4 60.Qh8 Bh6 61.Qh6) 59.Be4 (59.Bf7) 59...Bd2 60.Qg6 Kh4 61.Qg4 1–0. GuestHKRL – GuestYHNX, freechess.org, 2017.

5.Be2 e5 6.a3 (better 6.Be5 Bb4 7.Nf3+-) 6...a6? (better 6...Bd6+=) 7.Be5+- Ne4 8.Nf3 Qh4?? (8...Nd7 9.Bd4+-) 9.0-0 (better 9.Nh4 Nd7 10.Bd4+-) 9...Qg4 (9...Qe7 10.d3 Ng5 11.Nbd2+-) 10.Nd4 (better 10.d3 Nf6 11.Nd4+-) 10...Bf5 (10...Qg6+-) 11.Bg4 Bg4 12.Qg4 Nd2 13.Qc8 Ke7 14.Qb7 (14.Nf5) 14...Ke8 15.Nd2 (15.Bf6 Nf3 16.gf3 Nd7 17.Qa8 Nb8 18.Qb8 Kd7 19.Qd8) 15...Be7 16.Qc8 (16.Nf5 Ra7 17.Ng7 Kd8 18.Qb8 Kd7 19.Qa7 Kd8 20.Qc7) 16...Bd8+- 17.Nc6 Nc6 18.Qc6 Kf8 19.Qa8 (19.Bd6 Kg8 20.Qe8) 19...f5 20.Qd8 Kf7 21.Qd5 (21.Qd7 Kg6 22.Qg7 Kh5 23.Qf7 Kg4 24.Nf3 d4 25.h3) 21...Ke7 22.Qd6 (22.Qb7 Ke6 23.Nf3 Re8 24.Ng5 Ke5 25.f4 Kd6 26.Rfd1) 22...Kf7 23.Qd7 Kg8 (23...Kg6 24.Qg7 Kh5 25.Qf7 Kg4 26.Nf3 Rd8 27.h3) 24.Qe8 (24.Qg7) 1–0. GuestFTQX – GuestRPWF, freechess.org, 2018.

5.Be2 Bf5 6.Nf3 e6 7.a3 g6 (7...a5 8.b5+/-) 8.0-0 Bg7 9.d4 0-0 10.Nbd2 (10.Ne5 Ne8+-) 10...Nbd7 (10...Bg4 11.c4+-) 11.c4 Nb6 12.c5 Na4?? (12...Nbd7+-) 13.Qa4 Qc7 14.Qd1 (14.Ne5!? a5 15.Qc6 Qb8+-) 14...Ng4 (14...a5 15.Ne5 ab4 16.g4 ba3 17.Ba3 (17.gf5?! ab2 18.Ra8 Ra8+-) 17...Ng4 18.Ng4+-) 15.h3 Nf6 16.a4 White prepares the advance b5 (better 16.g4 Be4 17.Ne5 Ne8+-) 16...Bh3 (16...a6+-) 17.gh3 Nh5 (17...a6 18.Rb1+-) 18.b5 f5 19.Ne5 f4 (19...Be5 20.de5 f4 21.Bh5 gh5 22.e4 cb5 23.ed5 Qc5 24.de6+-) 20.Bh5 gh5 21.Qh5 (better 21.ef4 cb5 22.ab5 Rf4+-) 21...Qe7 (21...Be5 22.Qe5 Qe5 23.de5+-) 22.Kh1 (22.Nc6!? Qd7+-) 22...Rf5 (22...cb5 23.ab5 Qb7 24.Rg1 fe3 25.c6+-) 23.Qe2 (23.Nc6 Rh5 24.Ne7 Kf8+-) 23...Raf8 (23...Be5 24.de5 cb5 25.Rg1 Kh8 26.ab5 Qc5 27.Qg4+-) 24.Ndf3 (better 24.Nc6!? Qd7 25.ef4 Rf4+-) 24...fe3 25.fe3 R8f6 (25...cb5 26.ab5 Kh8 27.Nc6+-) 26.Ng4 (26.Nc6 Qf8 27.Nce5 Qc8+-) 26...Rg6 (26...Rf8 27.Nfe5 cb5 28.ab5 Rf1 29.Rf1+-) 27.Nfe5 Rgg5 (27...Re5 28.Ne5 Be5 29.de5+-) 28.e4 (better 28.Nc6 Qf7+-) 28...Rf8 (28...de4 29.Qe4 cb5 30.Rf5 Rf5 31.ab5+-) 29.Rf8 (29.Nc6 Qd7 30.Rf8 Kf8 31.Rf1 Kg8 32.ed5 Qd5 33.Qf3 Qf3 34.Rf3 h5+-) 29...Qf8 30.Rf1 Qe7 31.ed5 (31.ed5 ed5 32.Qe3+-) 1-0. BeepBeepImAJeep (2665) – Appanov, lichess.org, 2017.

4.a3 Bb7 5.Nf3 Nbd7 6.Rg1 e6=+ 7.g4 Bd6?? (better 7...h6=) 8.g5+- Nh5 9.Nh4 Bh2 10.Rg2 Be5 11.Be5 Ne5 12.Qh5 d4 13.Rg3 White prepares g6 13...d3 (13...de3 14.de3 Qd6 15.f4+-) 14.g6 (better 14.cd3!? g6 15.Qh6 Nd3 16.Bd3 Qd3 17.Nc3+-) 14...dc2 15.Nc3 Ng6 16.Rg6! fg6 (16...fg6 17.Ng6; 16...hg6 17.Qh8 Double attack (17.Qh8 Pinning; 17.Qh8 Deflection; 17.Qh8 Remove defender)) 17.Ng6! Bf3 (17...hg6 18.Qg4 Double attack (18.Qh8 Pinning; 18.Qh8 Deflection; 18.Qg4 Decoy)) 18.Bb5 (18.Qf3?! hg6 19.Qe4 Ke7+-) 18...c6 19.Bc6! Bc6 20.Nh8 Ke7 21.Qf7 (21.b5 Bd5 22.Nf7 Qe8 23.Nd5 ed5 24.Qd5 Rc8+-) 21...Kd6 22.b5?? (22.Qf4 Ke7 23.Nf7 Qf8 24.Qc7 Bd7+-) 22...Bd5? (22...Qg5 23.bc6 Qg1 24.Ke2 Qa1 25.Qd7 Kc5+-) 23.Qf4+- Ke7 24.Nf7 Qg8 (24...Qe8 25.Ng5 Kd7 26.Nd5 ed5 27.Qf5 Kd6 28.Rc1+-) 25.Qc7 Kf6 26.Ne5 Rc8 27.Ng4 (27.Nd5?! ed5 28.Qd6 Qe6 29.Qe6 Ke6+-) 27...Kg6 28.Qf4 h5 29.Ne5 Kh7 30.Qg5 (30.Qa4 Qf8 31.Qc2 Qf5 32.Qf5 ef5 33.Nd5 Rc5+-) 30...Qe8 31.Ke2 (31.Qh4 a6 32.ba6 Ra8+-) 31...Rc7 (31...Bb3+-) 32.Rh1 (better 32.Qh4+-) 32...Bh1-+ 33.Qg1 Bd5 (33...Be4! 34.a4 h4 35.f3-+) 34.Qc1 Rc3! 35.dc3 Qb5 36.Kd2 Be4 37.f4 Qd5 38.Ke2 h4 39.c4 Qc5 (39...Qd1 40.Qd1 cd1Q 41.Kd1-+) 40.Qe1 g5 (better 40...Kg8!? 41.Qd2 Qa3 42.Qd8 Qf8 43.Qf8 Kf8 44.Kd2-+) 41.Kd2 (41.Qd2 Qe7 42.Qc1-+) 41…Qa3 (41...Qa3 42.Qc1 Qb4 43.Ke2 h3-+) 0–1. FeegLood (2560) – fortresspieces (2610), lichess.org, 2016.

4.b5 Bb7 5.Nf3 g6 (5...a6 6.Nc3=) 6.Bf6 ef6 7.Nd4 Bg7 8.Be2 0-0 9.Nc3 c5 10.bc6 Nc6 11.Ba6 Nd4 (better 11...Ba6 12.Nc6 Qd6=+) 12.Bb7+- Exerts pressure on the isolated pawn 12...Nc2?? (better 12...Rb8 13.Bd5 Nb5 14.Bf7 Rf7 15.Nb5 Qd5+-) 13.Qc2+- Rb8 (13...d4 14.Ba8 Qa8 15.Nb5 Qg2 16.Rf1+-) 14.Bd5 f5 15.Qb3 Bc3 16.dc3 (16.Qc3?! Qd5 17.0-0 Rbc8=) 16...f4 17.0-0 fe3 18.fe3 Qg5 (18...Qe7 19.e4+-) 19.Bf7 Kg7 20.Rf3 Rbd8 21.Raf1 Rd2 22.g3 Qh5 23.h4 Qc5 (23...Qe5 24.Qe6 Qe6 25.Be6+-) 24.Qe6 Rd6 25.Qe4 Qc3 (25...Rd2+-) 26.Qe7 Rd2 27.Bg8! Kh8 (27...Kg8 28.Rf8) 28.Qh7 1–0. Janek – Ccvmep, internet, 2019.

4.b5 c5 5.c4 Bb7 6.Nf3 e6 7.d4 Nbd7 8.Nbd2 (---> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.d4 Nbd7 8.Nbd2).

4.b5 Bg4 5.Nf3 Bd7 6.c4 dc4 7.Bc4 Be6? (better is 7...e6!?+=) 8.Be6+/– fe6 9.Nc3 Nbd7 (9...a6 10.Qa4+-) 10.Ba3 (10.Ng5 Qc8+-) 10...h6 (10...a6 11.Ng5 Qc8 12.Qb3+/–) 11.0-0 g5 (11...a6 12.Nd4 Ne5 13.Ne6+-) 12.Nd4 Nd5?? (better is 12...Ne5+-) 13.Qh5 1–0. Speedy – wernt, internet, 2017.

4.c4 c5 5.bc5+= bc5 6.Bf6 ef6 7.cd5 (7.Nc3 d4 8.Qf3 dc3 9.dc3 Nc6 10.Qc6 Bd7 11.Qe4 Be7+=) 7...Qd5= 8.Nc3 Qd8?? (better is 8...Qd7=) 9.Qa4+- Bd7 (9...Nc6 10.Bb5 Rb8 11.Bc6 Bd7+-) 10.Qe4 Be7 11.Qa8 1–0. poesimannen (2125) – frodan (1760), gameknot.com, 2013.

4.Nf3 e6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3).

4.Nf3 g6 5.Be2 Bg7 6.0-0 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0-0 6.0-0 b6).

4.Bf6 ef6 5.c3 Bb7 6.d4 Nd7 7.Nd2 Bd6 8.Bd3 Qe7 9.Ne2 g6 10.h4 (10.0-0 0-0+=) 10...h5 11.g3 f5 12.Qc2 Nf6 13.0-0 Ne4 14.a4 a6 15.a5 b5 16.Nb3 (16.Kg2 g5 17.Nf3 f6+=) 16...f6 (16...g5!? 17.hg5 Qg5-/+) 17.Kg2 g5 18.Rh1 Bc8 (18...f4 19.ef4 gf4 20.Rhe1+=) 19.Nc5 Bc5 (19...Qg7 20.hg5 (worse is 20.Ne4 fe4 21.Be4 de4 22.Qe4 Kf7+=) 20...fg5 21.f3= (worse is 21.Ne4 fe4 22.Be4 de4 23.Qe4 Kf7+=)) 20.dc5 c6 (20...Bd7 21.Nd4 Qe5 22.c6=) 21.Nd4+/– Bd7 22.f3 gh4 23.fe4 (23.Rh4 Ng5+/–) 23...h3 24.Kh2 (24.Kf2!? fe4 25.Bf1+/–) 24...fe4= 25.Bf1 h4 26.Qf2 Qe5 27.Qf4 0-0-0? (27...hg3 28.Qg3 Ke7 29.Ne2+=) 28.gh4 (better is 28.g4+/–) 28...Rh4= 29.Qg3 Rg8 30.Qe5 fe5 31.Ne2 Bg4 32.Rg1 Rf8?? (better is 32...Kc7=) 33.Rg4!+- Rg4 34.Bh3 Rf2?? (better is 34...Rh8 35.Rg1 Rh3 36.Kh3 Rg1 37.Ng1 Kd7+-) 35.Kh1 Re2 (35...Kd8 36.Bg4 Kc7+-) 36.Bg4 (36.Bg4 Kd8 37.Be2+-) 1–0. orangutandu – poutu54, internet, 2012.

5.Qb3 e6 6.Nf3 Bd6 7.Be2 (7.c5 Be7= (7...bc5? 8.bc5 Bc5 9.Qb7+-)) 7...Nbd7 8.d4 Qe7?? (better 8...dc4 9.Bc4 Bf3 10.gf3 c5=) 9.c5+- Ne4 (better 9...bc5 10.bc5 Bc5 11.dc5 Nc5+-) 10.cd6 Nd6 (10...cd6 11.0-0+-) 11.Nbd2 f6 (11...0-0 12.0-0+-) 12.Rc1 0-0. jaddwarrior (1970) – Dad2002 (2045), ChessWorld.net, 2017.

5.Nf3 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.b5 Be7 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.c4 b6).

5.Nf3 Bb7 6.Qb3 a6 7.Be2 Bd6 8.Nc3 Ne4 (8...dc4 9.Qc4 Nbd7 10.d4=) 9.Ne4 (better is 9.cd5!? ed5 10.Nd5+=) 9...de4+= 10.Ne5 (10.Nd4 Nd7+=) 10...Be5 (better is 10...f6!? 11.Qa4 b5 12.cb5 fe5 13.ba6 c6-/+) 11.Be5= f6 12.Bc3 e5 13.0-0 Bc8 14.c5 b5 (14...Ra7!?+=) 15.a4 Bd7? (better is 15...ba4 16.Qa4 c6+-) 16.ab5+- Qe7 (16...Ra7 17.ba6 c6 18.d4 ed3 19.Bd3+-) 17.ba6 Be6 18.Bc4 Bc4 19.Qc4 Nd7 20.Qe4 0-0 21.Qc4 Kh8 22.Rfb1 Rfb8 23.d4 c6 24.d5 cd5 25.Qd5 h6 26.Rd1 Rd8 27.Qd6 Qd6 (27...Qe8 28.a7 Kh7 29.b5 Nc5 30.Qc5+-) 28.Rd6 Kh7 29.Rad1 Ra7 30.b5 (30.b5 Rb8 31.Rd7 Rd7 32.Rd7 Rb5 33.f4 Rc5 34.a7+-) 1–0. orangutanb4 (2025) – adighyzu (1920), internet, 2011.

5.a3 Nbd7 6.c4 dc4 7.Bc4 c5 8.0-0 e6 9.bc5 Bc5 10.Be2 0-0 11.d4 Bd6 12.Nbd2 Rc8 13.a4 Nd5 14.Qb3 Qe7 15.Rfc1 N7f6 16.Ne5 Rc7 17.Rc7 Bc7 (17...Qc7 18.Ndc4 Ba6 19.Nd6 Be2 20.Ba3+/–) 18.Ba3+= Bd6 19.Bd6 Qd6 20.a5 Rc8 21.ab6 Qb6 22.Rb1 (22.Qa3 Qd8 23.Ndc4+/– (worse is 23.Qa7 Ra8 24.Qb7 Ra1 25.Nf1 Qc7 26.Qc7 Nc7+=)) 22...Nc3= 23.Qb6 ab6 24.Rb6 Ne2 25.Kf1 Rb8 (better is 25...Nd4 26.ed4 Rc1 27.Ke2 Rc7=) 26.f3?? (better is 26.Nc6 Nd7 27.Ke2 Nb6 28.Nb8 Bg2 29.f3+=) 26...Nc3-+ 27.Kf2 Ncd5 (27...Nd1 28.Kg1 Ne3 29.Ne4-/+) 28.Rb2 Ne7 (better is 28...h6!?-/+) 29.g4 (29.Ne4 Ne4 30.fe4 Nc8+/–) 29...h6 (29...Ng6 30.Ndc4 Ne5 31.Ne5=) 30.h4 (30.Ne4 Ne4 31.fe4 Nc8+=) 30...g5 (better is 30...Ng6 31.Ndc4 Nh4=) 31.hg5+/– hg5 32.Ndc4 Ra8?? (better is 32...Ne8=) 33.Rb7+- Ra2 34.Kg3 Ned5? 35.Nf7 Rc2 36.Ng5 Rc4 37.e4 Ne3? 38.Ne6 Rc3 39.Rg7 Kh8 (39...Kh8 40.Rf7 Neg4+-). orangutandu – gadzet2004, internet, 2012.

5.a3 Nbd7 6.d4 g6 7.Bd3 Bg7 8.0-0 0-0 9.Nbd2 Re8 10.c4 dc4 11.Bc4 Ne4?? (better is 11...a6+=) 12.Ne4+- Be4 13.Bd3 (better is 13.Ng5 Bf5 14.Nf7+-) 13...Bd3+= 14.Qd3 c5 15.bc5 bc5 16.Rfc1 cd4 (better is 16...e5 17.de5 Ne5 18.Ne5 Be5=) 17.Bd4?? (better is 17.Nd4 Nb6 18.Qe2+=) 17...e5-+ 18.Bc3 e4 (18...e4 19.Qd5 ef3 20.Bg7 Kg7 21.Qf3 Ne5-+) 0–1. Fournier,Frederic – Dimexel, Partie evaluee, 1m + 2s, 2009.

5.c4 c6 6.a3 Nbd7 7.d4 g6 (7...e6 8.cd5 cd5 9.Bd3=) 8.cd5 cd5 9.Nbd2 Bg7 10.Bd3 Rc8 11.Qa4 0-0 12.0-0 (12.Qa7? Bc6 13.Bg6 Ra8 14.Qa8 Qa8-+) 12...Ra8 13.Rac1 a6 14.Rc2 b5 15.Qb3 Nb6 16.Rfc1 Nc4 17.Ba1 (< 17.Nc4 dc4 18.Bc4 bc4 19.Qc4 Be4-/+) 17...Rc8 18.Nb1 (< 18.Nc4 dc4 19.Bc4 Rc4 20.Rc4 Bd5-+) 18...Ne4 19.Nc3 Nc3 20.Rc3 (20.Qc3? Ne3 21.fe3 Rc3 22.Bc3 Qd7-+; 20.Bc3?! f6=) 20...Rc7 21.a4 e6 22.Bc2 Qe7 23.a5 Rfc8 24.Bd3 Nd6 25.Rc7= Rc7 26.Rc7 Qc7 27.Qc2 Nc4 28.Qd1 Bf8 29.Qe1 Qd6 30.Bc3 f6 31.Bc2 Bh6 32.Bb3 Qc6 33.Ba1 Nd6 34.Bb2 Ne4 35.Nd2 Nd6 36.Ba1 Bg7 37.Nf3 Bc8 38.Nd2 Bh6 39.Nb1 Ne4 40.Nc3 Nd6 41.Qd1 Bb7 42.Ba2 Bg7 43.Qe1 f5 44.Bb3= Kf7 45.Ne2 Bh6 46.Nc1 Ne4 47.Nd3 (White fights for the Initiative) 47...Bg7 48.Ne5+/– Be5 49.de5 Ng5 50.f3 h6 51.Bb2 Nh7 52.Qh4 h5 53.Qd8 Qc8 54.Qd6 Qc6 55.e4 fe4 56.fe4 Qd6 57.ed6 de4 58.Bd4 Bc6 59.g3 Nf8 60.h4 Nd7 61.Bc2 Bd5=+ 62.Kf2 e5 63.Bb6 Ke6 64.Bc7 Kf5 65.Bb1 Bc6 66.Ba2= Nf6 67.Bb6 Bd7=+ 68.Bb3 Ng4 69.Ke2 Nf6 70.Kf2 Ne8 71.Bc5 Nf6 72.Bb6 ½–½. Bonetti,Shane – patologo (1675), ICC, 2002.

5.c4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 d5).

5.c4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

5.c4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.c4 e6 6.b5 c6 7.bc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 c5 (=c6) 7.bc6).

4.b5 a5 5.c4 (5.Nf3 Nbd7=) 5...e6 6.Nc3 d4 7.ed4 cd4 8.Nce2 e5 9.Nf3 Bd6 10.g3 (better is 10.c5!? Bc5 11.Ne5=+) 10...Bg4–+ 11.Bg2 d3 12.Nc3 e4 13.Ne4 Ne4 14.0-0 (14.Bg7 Rg8 15.Bd4–+) 14...0-0 15.h3 Bh5 16.g4 Bg6 17.Qb3 (17.Ne5 Be5 18.Be5 Re8–+) 17...Re8 (17...a4 18.Qd1–+) 18.Qd3 (18.Bd4–+) 18…Bh2!! (19.Kh2 Qd3–+) 0–1. Reimer,Karl (1700) – Auer,Peter (2070), It (open) Pfalz GER, 1991. (Same as the game below; which is correct?)

4.b5 a5 5.c4 e6 6.Nc3 d4 7.ed4 cd4 8.Nce2 (8.Na4!?=) 8...e5+= 9.Nf3 Bd6 10.g3 (better is 10.c5!? Bc5 11.Ne5+=) 10...Bg4-/+ 11.Bg2 d3 12.Nc3 e4 13.Ne4 Ne4 14.0-0 (better is 14.Bg7 Rg8 15.Bd4-+) 14...0-0 15.h3 Bh5 16.g4 Bg6 17.Qb3 (17.Ne5 Be5 18.Be5 Re8-+) 17...Re8 18.Qd3 (18.a4-+) 18…Bh2!! (18...Bh2 19.Kh2 Qd3-+) 0–1. Reimer,Karl – Walker,Erik, RLPF–op Hauenstein, 1991. (Same as the game above; which is correct?)

4.b5 a6 5.c4 Bf5 (5...e6 6.Qf3=+) 6.Nc3 (6.cd5!? Nd5 7.ba6 ba6 8.Nc3=) 6...d4=+ 7.Nce2 d3 (7...ab5 8.Ng3 Bg4 9.Qb3 de3 10.Qe3 bc4 11.Bc4=) 8.Nc3 e5 (8...Nbd7=+) 9.Nf3 (Better is 9.Qf3!? Bc8 10.e4+=) 9...Nbd7 10.g3 Be7 11.Bg2 0-0 12.Nh4 Bg6 13.Ng6+= fg6 14.Bb7 Rb8 15.ba6 e4 16.Ba3 h5 17.Rb1+- Qc7 18.a7?? Rb7-+ 19.a8Q Ra8 20.Rb7 Qb7 21.Bc1 Ng4 22.0-0 Rf8 23.Qa4 Nde5 24.h3 Nf3 25.Kg2 Nge5 26.Qb5 h4 27.Qb7+- 1–0. slavisa3 – bampot, Live Game Caissa's Web, 2004.

4.b5 d4 5.ed4 cd4 6.Nf3 Bg4 7.Be2 (7.h3 Bf3 8.Qf3 e5+=) 7...d3 (7...Bf3!? 8.Bf3 Qd7+=) 8.Bd3+- Qd5 (8...e6 9.Nc3+-) 9.Nc3 Bf3? (better 9...Qh5+-) 10.Nd5+- (10.gf3?! Qe5 11.Qe2 Qc7+-; 10.Qf3?! Qf3 11.gf3 Nbd7+-) 10...Bd1 11.Nc7 Kd8 12.Na8 Bg4 (12...Bh5 13.Bd4+-) 13.0-0 (13.h3 Be6+-) 13...Nbd7 14.c4 (14.Bd4!? e5 15.Ba7 e4+-) 14...e6 (14...e5 15.Rae1+-) 15.h3 (15.Rfe1 Bb4 16.f3 Bh5+-) 15...Bh5 (15...Nc5 16.Bb1 Be2 17.Rc1+-) 16.a4 (16.g4 Bg6 17.Bb1 Kc8+-) 16...Kc8 17.g4 (17.b6!? Kb8 18.Nc7 Nb6 19.Nb5+-) 17...Bg6+- 18.Bb1 (better 18.Bg6!? hg6 19.g5+=) 18...Kb8= 19.a5 (19.g5 Nh5=) 19...Ka8 20.a6 b6 21.d3 (21.Rd1 Bb1 22.Rab1 Bd6=) 21...Nc5 (21...Bd6 22.f4=) 22.Ra3 Bd6 (22...Be7 23.f4 Ncd7 24.Ra1=) 23.f4 1–0. DEFFM – GuestYYFG, freechess.org, 2018.

4.b5 Nbd7 5.c4 Nb6 6.cd5 e6 (6...Nbd5 7.Nf3=) 7.de6+= Be6 8.Nf3 Be7 9.Be2 0-0 10.a4 Rc8 11.a5 Nbd5 12.0-0 Nb4 13.d3 Nd7 14.Nc3 Bf6 15.e4 (15.Qd2!?+-) 15...Ne5= 16.Ne5 Be5 17.Na4 Qc7 18.h3 (18.b6 ab6 19.ab6 Bh2 20.Kh1 Qf4=) 18...Rfd8 19.Be5 Qe5 20.f4 Qd4 21.Kh1 Nd3 (better 21...f5=+) 22.f5?? (better 22.Bd3 Qd3 23.Qd3 Rd3 24.b6=) 22...Nf2-+ 23.Rf2 Qf2 24.Qf1 Qf1 25.Rf1 Bb3 26.Nb2?? (26.Nc3-+) 26…Rd2 0–1. GuestWDDQ – GuestXDKL, freechess.org, 2017.

4.b5 Bg4 5.Nf3=.

4.bc5 Nbd7 5.d4 (5.Bf6 Nf6 6.d4+-) 5...e5 (5...b6 6.cb6 Qb6 7.Bc1+=) 6.c3 (better 6.de5!? Ne4 7.Qd5 Qa5 8.Nc3 Ndc5 9.Bb5 Ke7 10.Rd1+-) 6...Be7+= 7.Qc2 (7.Nf3 e4 8.Nfd2 b6+=) 7...0-0 8.Be2 Re8 9.Nf3 ed4 (9...e4!? 10.Nfd2 b6+=) 10.cd4+- Ne4 11.Nbd2 Ndf6 12.Ne5 Bf5 13.0-0 (better 13.Bd3+-) 13...Ng3=+ 14.Bd3 (14.fg3 Bc2 Discovered attack; 14.hg3 Bc2 Discovered attack) 14...Bd3 15.Qd3 Nf1 16.Rf1 Rc8 17.Ndf3 Ne4 18.h3 (18.Qb5 b6 19.cb6 ab6=+ (worse 19...Qb6 20.Qd5 Nd6 21.Ba3+=)) 18...Qa5 (18...b6 19.cb6 Qb6 20.Rb1-/+) 19.a3 (19.Qb3 Nf6 A) 20.Qb7? Rb8 (20...Qa2?! 21.Ra1 Rb8 22.Ra2 Rb7 23.Ng5=) 21.Bc3 Qc3 (21...Rb7 22.Ba5 Ne4 23.Nd3+-) 22.Qa7 Ra8-+; B) 20.e4=) 19...b6-/+ 20.Ra1 (better 20.cb6!? f6 21.Nd7-/+) 20...bc5-+ 21.Bc3?? (better 21.dc5 Qc5 22.Qd4-+) 21...Nc3 (21...Qc3 22.Qc3 Nc3 23.dc5-+) 22.dc5 (22.Qf5 Bf6 23.Ng4 Ne4 24.Qd5 Qc3 25.Nf6 Nf6-+) 22...Bc5 (22...Bf6 23.Nd7 Ne2 24.Qe2 Ba1 25.Qd1-+) 23.Ng5 f6 (better 23...Ne4 24.Nef7 Qd2 25.Qd2 Nd2-+) 24.Qh7 Kf8 25.Ng6. Akrapovik (1685) – by_Beka (1745), lichess.org, 2021.

4.bc5 Ne4 +=.

4.bc5 e6 (--> 1.b4 d5 2.Bb2 e6 3.e3 c5 4.bc5 Nf6).

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5).

5.b5 Bd6 6.c4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4).

5.d4 e5 6.c3 ed4 7.cd4+= Be7 (7...b6 8.Bb5 Bd7 9.Qa4+=) 8.Nf3+/- 0-0 9.Be2 (9.Nc3 b6+/-) 9...Bf5 (9...b6 10.Nbd2+=) 10.Nbd2 b6 11.cb6 (11.Rc1 bc5 12.dc5 Qa5+/-) 11...ab6 (11...Qb6 12.Bc3+=) 12.0-0 Na5 (12...Nb4 13.Ne5+=) 13.Bc3 (13.Bb5 Ne4+/-) 13...Rc8+= 14.Ba5 ba5 15.Qa4 Bb4 16.Rfc1 (16.Rac1 Qd6+=) 16...Qd6 (16...Bc3 17.Nb3=+) 17.a3 (17.Qb5 Rb8 18.Qa6 Rb6+=) 17...Rc1= 18.Rc1 Ba3 19.Rf1 (19.Ra1 Bb4=+) 19...Bb4 (19...Qb4 20.Qc6=+) 20.Rc1 Ne4 (better 20...Rb8=+) 21.Nf1?? (better 21.Ne4 de4 22.Ne5=) 21...Nc3-+ 22.Rc3 Bc3 23.Ne5 f6 (23...Rb8 24.Bd3 Bd3 25.Nd3-+) 24.Nd3 Bd7 (24...Rb8 25.Nc5-+) 25.Qa2 Ra8 (25...Be6 26.Bf3-/+) 26.Nf4 Bc6 27.Bf3 Rd8 28.Ng3 g5?? (28...Kh8 29.Qc2 Bb4 30.h3-/+) 29.Nfe2?? (better 29.Ne4 Qe7 30.Nc3 gf4 31.Bd5 (worse 31.Qa5 fe3 32.Ne2 Rb8-/+) 31...Bd5 32.Nd5=) 29...Qb4?? (29...Bb4-/+) 30.Nf5?? (better 30.Qc2 Ba4 31.Qf5+- (31.Qc3?! Qc3 32.Nc3 Bb3+-)) 30...a4 (30...Bd4 31.g3 Be5 32.Ned4 Bd4 33.Nd4-+) 31.h4 (31.Ne7 Qe7 32.Nc3-/+) 31...Bb2-+ Black prepares a3 32.hg5 a3 (better 32...fg5!? 33.Ne7 Qe7 34.Qb2 Qe6-/+) 33.gf6= Bb7 (33...Qe1 34.Kh2 Kf7 35.Ne7 Qf2 36.Ng3=) 34.Ne7 (better 34.Nf4!? Kh8 35.Ne6+/-) 34...Kf7 35.Bd5?? (better 35.Nd5 Qe1 36.Kh2 Bd5 37.Bd5 Kf6 38.Ng3+=) 35...Kf6-/+ 36.Bb7 (36.Nf4 Ke7 (worse 36...Qe7 37.Bb7 Qd6 38.g3+=) 37.Bb7 Qb7 38.Qe6 Kf8-/+) 36...Qb7-+ (36...Ke7?! 37.Qb1 Rf8 38.Bd5=) 37.Nd5?? (better 37.Nf4 Qe7 38.Nd5 Rd5 39.Qd5-+) 37...Kg7 (better 37...Qd5 38.Nc3 Bc3 39.Qa3 Qc6-+) 38.Nef4= h6?? (better 38...Qf7=) 39.Ne6+- Kg6 (39...Kh8 40.Nd8 Qg7 41.Nf4+-) 40.Nd8 (40.Qb1 Kf7 41.Qf5 Ke8 42.Qf8 Kd7 43.Qe7 Kc6 44.Nd8 Kb5 45.Qb4 Ka6 46.Qa4) 40...Qb5 (40...Qd7+-) 41.Nf4 Kg5 42.Nde6 (42.Qg8 Kf6 43.Qf7 Kg5 44.Qg6 Kh4 45.g3) 42...Kf6+- 43.Nd5 Kg6 (43...Kf7 44.Nec7 Qb7 45.Qb1 Qc7 46.Qf5 Kg8 47.Nc7+-) 44.Nec7 (44.Qb1 Kf7 45.Qf5 Ke8 46.Nec7 Kd8 47.Qf8 Kd7 48.Qe8 Kd6 49.Qe6) 44...Qb4 (44...Qd7+-) 45.Nb4 (45.Nb4 h5 46.Qg8 Kh6 47.Ne6 Bd4 48.Qg5 Kh7 49.ed4 a2 50.Qg7) 1-0. zembelek (2055) - babken (2210), Rated Blitz game, lichess.org, 2014.

5.d4 Bf5 6.c4 a6 7.Nd2 e6 8.Ngf3 e5? 9.cd5+- Na5? 10.Ne5 Qc7 11.d6 Qd8 12.Ndc4 Nc6 13.Bd3 Bd3 14.Qd3 Nb4 15.Qd1 b5 16.Nb6 Bd6 17.Na8 Be5 18.0-0 Bb8 19.e4 0-0 20.e5 Nfd5 21.Qg4 Nd3 22.Bc1 Ne5 23.de5 Be5 24.Bg5 Qa8 25.Rac1 Qc6 26.Rfd1 Nf6? 27.Qf5+- Re8 28.Re1 g6 29.Qf3 Qf3 30.gf3 Kg7 31.Bf6 Kf6 32.f4 Bb2 33.c6 Rc8 34.Rc2 Ba3 35.Rd1 Kf5 36.c7 Be7 37.Rd7 Bh4?? 38.Rf7 Kg4 39.Rh7 Bf6 40.Rf7 Kf5 41.Rc6 Kf4 42.Rff6 Ke5 43.Rg6 (43...b4 44.Rge6 Kf4 45.Red6+-) 1–0. ncc_1701 – michaelanthony, ChessWorld.net, 2005.

5.Nf3 e6 6.d4 Qa5 7.Bc3 (7.Qd2 Qd2 8.Nbd2 Nb4 9.Bb5 Bd7 10.Bd7 Nd7+-) 7...Qa4 (7...Qc7 8.Na3+=) 8.Bd3+- Nb4 (8...b6 9.Qe2 a6 10.cb6+-) 9.Nbd2 (9.Bb4 Qb4 10.Nbd2 Be7+-) 9...Nd3 10.cd3 Bd7 (10...Qd1 11.Rd1 b6 12.Bb4+-) 11.0-0 (better 11.Qa4 Ba4 12.Rb1+-) 11...Ne4?? (better 11...Rc8+-) 12.de4+- de4 13.Ne4 Qd1 14.Rfd1 Bc6 15.Neg5 (15.Ng3 Bf3 16.gf3 0-0-0+-) 15...Be7 (15...h6 16.Nh3+-) 16.d5 (better 16.e4!? Bf6 17.Re1 h6+-) 16...Bd5 17.e4 (17.Bd4 0-0+-) 17...Bc6 18.Bg7 (better 18.Bd4!? Bg5 19.Ng5 h6+-) 18...Rg8 19.Bh6 Rg6 (19...Bg5 20.Bg5 Be4 21.Nd2+-) 20.Nf7! (20.Nh7?! Rh6 21.Nhg5 Rh5+-) 20...Kf7 (20...Be4 21.N3e5 Rg2 22.Kf1 Rh2 23.Be3+-) 21.Ne5 Kf6 (21...Ke8 22.Ng6 hg6 23.e5+-) 22.Ng6 Kg6 23.Be3 Be4 24.Rd7 Bf6 25.Rc1 (25.Rad1 Bc6 26.R7d3 Bd5+-) 25...Bc6 26.Rd6 (26.Rd2 Kf5+-) 26...Bd5 (26...Rg8 27.f3+-) 27.Rb1 (27.Rc2 Be5 28.Rd7 h5+-) 27...Re8 (27...b6 28.cb6 ab6 29.Rdb6 Ra2 30.f3+-) 28.Rb4 (28.a3 Rg8+-) 28...Ba2 (28...Rc8 29.Rd7+-) 29.Rb7 Ra8 (29...a5 30.Ra7 Rb8 31.Rb6+-) 30.Rdd7 (30.Ra6 Bd5 31.Rba7 Ra7 32.Ra7 h5+-) 30...Bd5 31.Ra7 Bc6 (31...Rb8 32.h4 h5 33.Rh7+-) 32.Rh7 Ra7 (32...Rg8 33.g4 Bg7 34.Rh5+-) 33.Ra7 Kf5 (33...Bd5 34.h3+-) 34.Ra6 Bb5 (34...Bb7 35.Rb6 Bd5 36.c6+-) 35.Rb6 Bd7 (35...Bc4 36.g4! Ke4 37.g5+-) 36.c6 Bd8 (36...Be8 37.c7 Bd7+-) 37.cd7 Kf6 38.Rb8 Ke7 39.Bg5 Kd7 40.Rd8 (40.Rd8 Kc6 41.h4+-) 1–0. GuestSWHX – GuestVJBQ, freechess.org, 2018.

5.Nf3 Bg4 6.Bb5 e5 (6...a6 7.Bc6 bc6 8.h3+=) 7.h3+- Bf3 8.Qf3 (8.gf3?! Bc5 9.Be5 0-0 10.Bf6 Qf6=) 8...Bc5 9.Be5 a6 (9...0-0 10.Bf6 Qf6 11.Qf6 gf6 12.Nc3+-) 10.Bc6 bc6 11.Bf6 (11.Nc3+-) 11...gf6 (better 11...Qf6!? 12.Qf6 gf6+-) 12.0-0+- Qd6 13.Nc3 0-0-0 (13...0-0+-) 14.Na4 Ba7 15.d4 Rdg8 (15...Kd7 16.Qe2+-) 16.Qe2 (16.Rfb1 Qe6 17.Rb3 Rg5+-) 16...Bb8 (16...Kd8 17.Rab1 Rg6 18.Kh1+- (18.Qa6 Rhg8 19.Rfc1 Rg2 20.Kf1 Bd4 21.Qa8 Ke7 22.Rb7 Ke6 23.Qg8 Rg8 24.ed4 Qh2 25.Re1 Kf5-+)) 17.f4 Rg3 (17...Qb4 18.Qa6 Qb7 19.Qd3+-) 18.Nc5 Rhg8 (18...Qe7 19.Qa6 Kc7 20.e4 de4 21.Rab1+-) 19.Qa6 Kd8 (19...Kc7 20.Rf2 Rf8+-) 20.Nb7 (20.Nb7 Kd7 21.Nd6 Rg2 22.Kh1+-) 1–0. DEFFM – Maratonman, freechess.org, 2018.

5.Nf3 Bg4 6.Be2 e5? (better is 6...e6!?+=) 7.Ne5+/– Be2 8.Qe2 (8.Ke2?! Bc5 9.Kf1 0-0+=) 8...Bc5 9.0-0 (9.Qb5 Qb6 10.Qb6 ab6+-) 9...0-0 10.d4 (10.Nd3 Bd6+/–) 10...Bd6+= 11.c4 Qc7 12.f4 Ne4 (12...dc4 13.Nc3+=) 13.Nd2 (better is 13.cd5!? Ne7 14.Rc1+/–) 13...Nd2= 14.Qd2 dc4 (14...Bb4 15.Bc3 Ne5 16.fe5 (< 16.Bb4 Nc4 17.Rac1 Rfe8-/+) 16...Bc3 17.Qc3 Qc4 18.Qb2+=) 15.Nc6 (better is 15.Nc4!? Rad8 16.d5+/–) 15...Qc6= (< 15...bc6 16.Rac1+/–) 16.Qc3 (16.d5 Qc5=) 16...Qb5 (16...Qd5 17.Rfc1 Rfc8 18.a4=+) 17.d5 (17.e4 Rfe8 18.a4 Qc6=) 17...f6 18.e4 (18.Rfd1 Rac8=) 18...Rac8 (18...Qb6 19.Kh1 Rfe8 20.Qc2=) 19.a4 (19.Rab1=) 19...Qb3 (19...Qb6 20.Kh1=+) 20.e5 (20.Qb3 cb3 21.e5 fe5 22.fe5 Bc5 23.Kh1 Rf1 24.Rf1 Rd8+/–) 20...Qc3 21.Bc3+= fe5 22.fe5 Rf1 23.Rf1 Bc5 24.Kh1 g6 25.e6 Rf8 26.Re1 Be7 27.g3 Rf3 28.Bd4?? Rd3= 29.Ba7 c3 30.Rc1 Rd5?? 31.Rc3+/– Rd1 32.Kg2 Rd2 33.Kh3 Kg7 34.Rc7 Kf6+/– 35.Rb7 Ke6 36.a5 Ra2 37.Bb6 h6 38.Rb8 Bd6 39.Re8 Kf7 40.Re3 Bb4 41.Re5 ½–½. gtate (1905) – wmalone (2100), net–chess.com, 2004.

5.Nf3 Bg4 6.Bf6 ef6 7.d4+/–.

5.Bf6 ef6 6.d4 g6 7.Nf3 Bg7 (7...Be6 8.Nbd2+-) 8.c4+- h5 (8...Be6!?+-) 9.cd5+- Qd5 10.Nc3 Qd8 11.d5 Ne5 12.Ne5 fe5 13.Qa4 Kf8 14.Rd1 Kg8 15.d6 Bd7 (15...Be6 16.Bc4 Bc4 17.Qc4+-) 16.Bb5 Bb5 (16...Bg4 17.Rd2 Bf5+-) 17.Qb5 (17.Nb5?! Qd7+-) 17...Qg5 (17...Rc8+-) 18.Qb7 Kh7 19.0-0 h4 (19...f5 20.Rb1 h4 21.c6+-) 20.c6 Rab8 (20...h3 21.c7 e4 22.g3 Bc3 23.d7+-) 21.Qf7 Rhf8 (21...h3 22.g3 Rbf8 23.Qe6+-) 22.c7 Rb2 (22...h3 23.g3 Rbc8+-) 23.Ne4 Qg4 (23...Rf7 24.Ng5 Kh8 25.Nf7 Kh7 26.d7 Rb7 27.c8Q Bf6 28.Qe8 a6 29.d8Q Rf7 30.Qf7 Kh6 31.Qdf6 Kh5 32.Q7g6) 24.Nf6 (24.Nf6 Kh6 25.Ng4 Kh5 26.Qg7 Rh8 27.Rd5 Rf2 28.Re5 Rf5 29.Ref5 gf5 30.Rf5) 1–0. Adlai – Gregory, internet, 2021.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6).

4.a3 Bg4 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.a3).

4.a4 e6 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3).

4.a4 Bf5 5.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.a4).

4.c4 a5 5.b5 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

4.c4 g6 5.Nf3 Bg7 6.Nc3 0-0 7.d4 Bg4 8.h3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nc3 Bg4 8.h3).

4.Nf3 g6 5.a4 Bg7 6.c4 0-0 (---> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

4.h3 Nbd7 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.h3).

5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

5.Bc4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 dc4 6.Bc4).

5.Bc4 Bf5 6.Nf3 e6 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

5.a3 e6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6 5.a3 Nbd7).

5.cd5 cd5 6.a3 e5 7.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

5.Nf3 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

5.a3 Be7 6.Nf3 0-0 7.d4 a5 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 a5).

5.a4 Be7 6.b5 0-0 7.Nf3 Nbd7 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 Nbd7 8.Be2).

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6).

5.a3 e6 6.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6).

5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.a3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

5.a3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.a3 Be7 6.d4 0-0 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4).

5.a3 Be7 6.Be2 0-0 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.Be2 c6).

5.a3 e6 6.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3).

5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

5.c4 e6 6.Qb3 Nbd7 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 c6).

5.Nf3 Bg7 6.Be2 0-0 7.0-0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Bg4 7.0-0 c6).

4.a3 d4 5.ed4 (5.b5!? Ne5 6.Bd4+/–) 5...Nd4= 6.Nf3 Nf5 7.d4 Ne4 8.Bd3 Ned6 9.Nbd2 Be6 10.0-0 b5 11.Rc1 g6?? (better is 11...a5+=) 12.d5!+- Bg7 (12...Bd5 13.c4 Double attack (13.Bh8 Discovered attack; 13.c4 Decoy)) 13.Bg7 (13.de6?! Bb2 14.Rb1 Bf6+/–) 13...Ng7 14.de6 Ne6 15.c4 a6 16.cb5 (better is 16.c5!? Nf5 17.Be4 Ra7+-) 16...ab5 17.Qe2 Ra3 18.Bb5 Nb5 19.Qb5 Kf8 20.Nc4 Nd4 (20...Rd3 21.Ne3+-) 21.Qe5 (21.Nd4 Rd3 22.Nc6 Rd5+-) 21...f6 (21...Nf3 22.gf3 f6+-) 22.Qd4 Qd4 23.Nd4 (23.Na3?! Qb4 24.Nc2 Qb7+=) 23...Kg7 (23...Ra4+-) 24.Na3 Rd8 25.Rfd1 (better is 25.Ne6 Kh6 26.Nd8 g5+-) 25...Ra8 26.Nc4 Ra4 27.b5 c5 28.bc6 Kf7 29.c7 Ra8 30.Nb6 Rf8 31.c8Q (better is 31.Nc6 Kg7 32.Rd8 Rf7+-) 31...Rc8 32.Rc8 h5 33.Nf3 1–0. Fournier,Frederic – altoybajo, Active, 2008.

4.a3 Bd7 5.Nf3= e6 6.c4 dc4 7.Nc3 Be7 8.Bc4 0-0 9.0-0 Bd6 10.Nb5 a6 11.Nd6 cd6 12.Rc1 d5 13.Be2 e5? (better is 13...Rc8!?+/–) 14.Ne5+- Ne5 15.Be5 Ne4 (15...Qe7 16.f4+-) 16.d3 Ng5 17.f4 Ne6 (17...Qe7+-) 18.f5 Ng5 19.h4 f6 20.Bc7 (20.hg5?! fe5 21.f6 gf6+=) 20...Qe7 21.hg5 Qe3 22.Rf2 (22.Kh1 fg5 23.Bg4 Rf6+-) 22...Bf5?! (22...fg5 23.Bf3 Rf5+-) 23.Bf3 Kh8 24.Bd5 fg5 25.Qd2 Qd2 (25...Qd4 26.Bb7 Rae8 27.Ba6+-) 26.Rd2 Rac8 (26...h5 27.d4+-) 27.Bb7 Rc7 (27...Rce8 28.Ba6 h5 29.b5+-) 28.Rc7 Rb8 (28...Rf6 29.Rf2 h5 30.Be4 Be4 31.Rf6 gf6 32.de4+-) 29.Ba6 Ra8 (29...h5 30.Rf2 Bg6 31.Bc4+-) 30.Rf2 Bg6 (30...g6 31.Re2 g4+-) 31.Rc8 Be8 32.Rf8 1–0. usingprogram (2040) – paaponen, internet, 2011.

4.a3 e6 5.Be2 =.

4.a3 g5 5.h3 g4 (5...Bg7 6.Nf3=) 6.hg4 (better is 6.Bf6 ef6 7.hg4+/–) 6...Ng4?? (better is 6...Bg4 7.f3 Be6+=) 7.Bh8+- f6 (7...Bf5 8.Be2 Qd7 9.b5+-) 8.Rh7 Bh6 (8...Bf5 9.Rh5 Qd7 10.d4+-) 9.Bg7 Bg7 10.Rg7 Nh6 (10...Qd7 11.Nf3 Qd6+-) 11.Qh5 Kf8 (11...Kd7 12.Qd5 Ke8 13.Qh5 Kd7 14.Qh6 Qf8+-) 12.Qh6 Ke8 13.Rg8 (13.Qh5 Kd7 14.Qd5 Ke8 15.Rg8) 13...Kf7 14.Qg6 Ke6 15.Rd8 Bd7 16.Ra8 (16.Qg4 f5 17.Qg6 Ke5 18.Nf3 Ke4 19.Nc3) 16...Ne5 17.Qg8 Kd6 18.Nf3 f5 19.Ne5 Ke5 20.Nc3 Bb5 (20...c6 21.Qg3 f4 22.Qf4 Ke6 23.Ne4 de4 24.Bc4) 21.f4 Kd6 22.Qd5 1–0. Fournier,Frederic – blek13, Active, 2008.

4.a3 g6 5.Nf3 Bg7 6.Be2 0-0 7.d3 Bg4 8.Nbd2 a6 9.0-0 Qd7 10.c4 Bf3 11.Nf3 (worse is 11.gf3 Rfd8+=) 11...dc4 12.dc4 Qd1 13.Rfd1 Rad8 14.Rd8 Rd8 15.Rd1 Rd1 16.Bd1 Nd7 17.c5?? (17.Bg7 Kg7 18.Nd2 f5+=) 17...Na7 (better is 17...Bb2 18.Be2 Ba3-+) 18.Bg7+= Kg7 19.Ba4 Nf6 20.Nd4 c6 (20...e5 21.Nf3 e4 22.Nd4+=) 21.f3 (21.Nb3 Nb5 22.Bb5 ab5+/–) 21...Nb5 22.Bb5 ab5 23.Kf2 Nd5 24.Ke2 (24.Nb3!?+/–) 24...Nc3+= 25.Kd3 Nb1 26.Nc2 e5 27.e4 f6 28.g3 Kf7 29.h4 h5 30.g4 (30.Ke3 g5+=) 30...hg4 (30...g5 31.hg5 h4 32.Ke2 fg5 33.Kf2-/+) 31.fg4= g5?? (better is 31...Kg7=) 32.h5+- Kg7 33.Ke3?? (better is 33.Ne3 Na3 34.Nf5 Kf8 35.Nd6+-) 33...Nc3 (33...Kh8 34.Na1=) 34.Kd3 Nb1 35.Ke3 (better is 35.Ne3 Na3 36.Nf5 Kf8 37.Nd6+-) 35...Nc3+= 36.Kd3 Nb1= ½–½. Fournier,Frederic (1950) – championchafa (1920), Active, 2004.

4.b5 Na5 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5).

4.b5 Nb8 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6).

4.Bb5 Bd7 5.a3 =+.

4.c4 d4 5.a3 (better 5.b5!? Na5 6.Bd4+-) 5...e5=+ 6.ed4 (6.Qa4 Bg4=+) 6...Nd4 (6...ed4 7.d3-/+) 7.Nf3 Nf3 (7...Bg4!?-/+) 8.Qf3=+ Bg4 (better 8...a5!?=+) 9.Qb7+= c6? (better 9...Bd6+=) 10.Qc6+- Bd7 11.Qf3 g6 (11...Bd6 12.Bd3+-) 12.Be5 Bg7 13.Bd6 Be6? (13...Bf8 14.Qe3 Be6+-) 14.c5 Nd5 (14...Nd7 15.Nc3 Be5+-) 15.Bb5 Bd7 16.Qe4 (better 16.Qd5 Bb5 17.Kd1 Be2 (17...Ba1?? 18.Re1 Be2 19.Re2 Be5 20.Re5 Qe7 21.Re7 Kd8 22.Qa8) 18.Ke2 Rc8+-) 16...Ne7 17.Bd7 Qd7 (17...Kd7 18.Nc3 Rb8 19.0-0+-) 18.Qa8 Nc8 (18...Qc8 19.Qe4 Qe6 20.Qe6 fe6 21.Nc3+-) 19.Qe4 (better 19.Nc3 f6 20.0-0 g5+-) 19...Ne7 (19...Kd8 20.Qh4 Ke8 21.Nc3 Nd6 22.cd6 Qd6 23.0-0+-) 20.Nc3 0-0 (20...Qe6 21.0-0-0 Qe4 22.Ne4+-) 21.0-0 Re8 22.Rae1 Nf5 23.Qe8 Qe8 24.Re8 Bf8 25.Rf8 Kg7 1–0. zomboeb – genc68, lichess.org, 2019.

5.b5 ab5 6.Bb5 e5 7.d4 (better 7.Bc6!? bc6 8.Be5+=) 7...ed4 8.Bd4 g6 (8...Bd7 9.Bb2=+) 9.Nf3 Bg7 10.Ne5 0-0 (10...Qd6 11.Qd3=) 11.Bc6 (11.Nc6!? bc6 12.Bc6+-) 11...bc6= 12.Nc6 Qd6 13.Ne5 c5 14.Bb2 Rb8 15.Nc4? (15.Nd3!? Re8 16.h3=+) 15...Qa6 (better 15...Qe6-+) 16.Bf6?? (better 16.Be5 Bg4 17.f3-/+) 16...Qc6 (better 16...Bf6 17.Nbd2 Ba1 18.Qa1 dc4-+) 17.c3 (17.Bg7 Kg7 18.Ne5 Qd6+-) 17...Bb7?? (better 17...Bf6 18.Ncd2 Ba6=+) 18.Nbd2 (18.Bg7 Kg7 19.Ne5 Qd6+-) 18...d4?? (better 18...Qf6!? 19.Na5 Qc3 20.Nb7 Qa1 21.Qa1 Ba1 22.Nc5 Bc3-+) 19.Ne4 (better 19.Bg7!? Kg7 20.f3 dc3+-) 19...de3?? (better 19...Qe4 20.Bg7 Qg2=) 20.Qc2?? (better 20.Ncd6 Bf6 21.Nf6 Kg7 22.Nde4 (22.Nb7?! Qf6 23.0-0 Rb7=) 22...ef2 23.Kf2+-) 20...e2?? (better 20...ef2 21.Kf2 Bf6-/+ (worse 21...Qe4 22.Qe4 Be4 23.Bg7 Kg7 24.Rhe1=)) 21.Rd1 (better 21.Ncd6+-) 21…h6 (21...Bf6?! 22.Rd5 Bg7 23.Ne3-+) 1–0. Eti,Lui – Clarke,Andrew, NZL NZCCA Handicap, 1992.

5.c4 e6 6.cd5 ed5 7.Nf3 Bd6 8.Be2 Ne7 (8...Bf5 9.0-0=) 9.0-0 0-0 (9...Nf5 10.Qc2=) 10.h3 (10.Bf6 gf6 11.d4 Bf5+/–) 10...c5 (better is 10...Ng6!?=) 11.bc5 Bc5 12.d3 (12.Bf6!? gf6 13.d4+/–) 12...Nf5 Black intends d4 13.Nbd2 d4 (13...Be3 14.fe3 Ne3 15.Qb3 Nf1 16.Rf1=) 14.ed4 (better is 14.Nb3!? b6 15.Nfd4 Nd4 16.Nd4+/– (16.ed4?! Be7=)) 14...Bd4 15.Nd4 Nd4 16.Nf3 Nf5 17.d4 Ne7 18.Rc1 Bf5 19.Bd3 Bd3 20.Qd3 Ng6 21.Rfe1 Re8 22.Re8 Qe8 23.Qc3?? (23.Qb3 Qd7=) 23...Ne4?? (better is 23...Nf4 24.Kh2 Ne2-+) 24.Qc2 Nd6 25.d5 Rc8 26.Qd2 Ne4 27.Rc8 Qc8 28.Qd4 Qc2?? (better is 28...Nf6 29.Ne5 Ne5 30.Qe5 Qd7+=) 29.Qg7 1–0. Fournier,Frederic (1755) – DADYYAN, Active, 2005.

5.Nf3 b5 6.d4 Bg4 7.h3 Bh5 8.a4 e6 (8...Bf3!? 9.gf3 Rb8+=) 9.ab5+/– ab5? (better is 9...Na7 10.Ra6 Bg6+/–) 10.Bb5+- Ra1? (10...Bb4 11.c3 0-0 12.Bc6 Ra1 13.Ba1 Be7+-) 11.Bc6 (11.Ba1?! Qa8 (11...Bb4? 12.c3 0-0 13.Bc6+-) 12.g4 Bg6+/–) 11...Ke7 (11...Nd7 12.Ba1 Bb4 13.c3 Bd6+-) 12.Ba1 Ne4 (12...Nd7 13.e4 Nb8 14.ed5 Nc6 15.dc6+-) 13.Nbd2 f5 (13...Qd6 14.b5 Nd2 15.Qd2+-) 14.g4! fg4 (14...Be8 15.Ne5 Qd6 16.b5 Bc6 17.Nc6 Kf7 18.c4 dc4 19.Nc4+-) 15.hg4 Bg6 (15...Bg4 16.Ne4 de4 17.Be4+-) 16.Ne5 Ng5 (16...Be8 17.Ne4 de4 18.c4+-) 17.Ng6 Kf6 18.Nh8 Bb4 19.c3 Bd6 20.Rh7! Nh7 21.Qf3 Kg5 22.Ne4! de4 23.Nf7 Kg6 24.Be4 1–0. orane – GlobeisWarming2, Live Game Caissa's Web, 2006.

5.Nf3 e5 6.b5 ab5= 7.Bb5 Bg4 (7...e4!? 8.Ne5 Qd6=) 8.Be5+= Be7 9.Bb2 0-0 10.Be2 Ne4 11.d3 Bf3 12.Bf3 (worse is 12.de4 Be4 (worse is 12...Bg2 13.Rg1+/–) 13.Nc3 Bf6+=) 12...Ng5 13.0-0 d4? (better is 13...Bf6 14.Nc3 Re8+=) 14.Bc6+- bc6 15.Bd4 c5 16.Be5 f6 17.Bf4 Bd6 18.Bd6 (18.Qg4 Re8+-) 18...cd6 19.Nd2 Qd7 20.Nf3 h5? (better is 20...d5+-) 21.Ng5 fg5 22.Qh5 Ra4 (22...Qf5 23.a4+-) 23.Qg5 Rg4 (23...d5 24.Rfe1+-) 24.Qd5 Rf7 25.g3 (25.Rfb1 Qc7+-) 25...Qe7 26.Rab1 g6 (26...Rg6 27.Rb8 Kh7 28.c4+-) 27.e4 (27.Rb6 Kh7 28.e4 c4 29.Qd6 Qh4+-) 27...Kg7 (27...Rg5 28.Rb8 Kg7 29.Qa2+-) 28.Rb6 Rg5 29.Qd6 Qf8 (29...c4 30.Rfb1+-) 30.Qf8 Rf8 31.f4 Rh5 32.Rb7 Kg8 33.Rfb1 g5 34.fg5 Rg5 35.Rb8 (35.Rc7 Ra8+-) 35...Rg4 (35...c4 36.d4+-) 36.Rf8 Kf8 37.a4 1–0. Fournier,Frederic (1925) – second, Active, 2011.

5.Nf3 e5 6.Be5?! Ne5 7.Ne5 Bd6 =.

5.Nf3 e5 6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 Bg4 (9...0-0 10.Qf3+-) 10.Be2+- Be2 11.Qe2 (worse 11.Ke2 Qe6=) 11...0-0 (11...a5 12.b5+-) 12.Nd2 (12.0-0 Rfe8+-) 12...Rfe8 (12...a5 13.b5+-) 13.0-0 c6 (13...a5 14.Qb5+-) 14.c4 Ne4 15.Rfc1 (15.Ne4 Re4 16.c5 Qe6+-) 15...a5 (15...Nd2 16.c5 Qh6 17.Qd2+-) 16.cd5 Qd5 17.Nc4 ab4 18.Nb6 (18.ab4?! Ra1 19.Ra1 Qb5+=) 18...Qa5 (18...Nc3!? 19.Rc3 Qd8 20.Rc6 bc6 21.Na8 Qa8+-) 19.Na8 Ra8 (19...ba3 20.Qd3 Qa8 21.Ra3+-) 20.Qb2 Qf5 (20...ba3 21.Qb7 Qa6 22.Qc6 Qc6 23.Rc6+-) 21.ab4 Re8 22.Ra5 (22.Ra5 Qg6 23.b5 cb5 24.Qb5+-) 1–0. b4_player – story, casual, 2013.

5.Nf3 e6 6.d4 Be7 (6...Bd7 7.Bd3=) 7.Bd3 h6 (7...0-0 8.0-0=) 8.0-0 (8.Nbd2 0-0+=) 8...0-0 9.Nbd2 b5 10.c3 Bb7 (10...Bd7 11.e4+=) 11.a4 ba4 12.Qa4 Bd6 13.Rfb1 (13.Rfe1 Nd7+=) 13...Qc8 (13...Qd7 14.Nb3+=) 14.Re1 (14.Nb3 Ne4+=) 14...Re8 15.Qc2 (15.e4 e5 16.ed5 Nd5+=) 15...Ne7 (15...e5 16.de5 Ne5 17.Ne5 Re5 18.Nf3+=) 16.Ne5 (16.e4 de4 17.Ne4 Be4 18.Be4 Ne4 19.Qe4 Nd5+=) 16...Be5 17.de5 Nd7 18.f4 (18.c4 Nc6 19.Qc3 Nde5+= (19...Nce5? 20.f4+-)) 18...c5 19.Qd1 (19.Nf3 Qc7+=) 19...cb4 (19...Qc7 20.Qg4=) 20.cb4+= Qc6 (20...Nc6 21.Bc3+=) 21.Bd4 (21.Qe2 Qc7+-) 21...Nb8 (21...Qc7 22.Qa4+-) 22.Nb3 Nd7 (22...Nf5 23.Rc1 Qd7 24.Nc5+-) 23.Qg4 (better 23.Rc1 Qa4 24.Rc7+-) 23...Rec8?? (better 23...Qc7+-) 24.Rec1+- Qc1 (24...Nc5 25.Nc5 Qc7 26.Rc3+-) 25.Nc1 Rc1 (25...Nc6 26.Bc3 d4 27.ed4 Nce5 28.de5 Rc3+-) 26.Rc1 a5 (26...Nc6 27.Ba6! Nce5 28.fe5 Ba6+-) 27.Rc7 ab4 28.Rd7 (28.Rd7 Nc6 29.Rb7+-) 1–0. kamret (2185) – G_Kasparov (1620), GameColony.com, 2005.

5.Nf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.h4 (8.b5!? ab5 9.Bb5=) 8...Ng4-/+ 9.h5 Be4 10.d3 Bf5 11.Bh3 (11.Be2 e5+=) 11...e5 12.Ne5 (12.Qe2!?-/+) 12...Nce5 13.Be5 Ne5 14.Bf5 Qg5 (14...Qf6 15.d4 Qf5 16.de5-/+) 15.d4? (better is 15.Bh3=) 15...Qg2-+ 16.Kd2? (better is 16.Rh3!? Qg1 17.Ke2-/+) 16...Qf2 17.Kc1 Nc4 (17...Qf5 18.de5 Qe5 19.Qd4-+) 18.Bd3 (18.Qd3 Be7 19.Nc3 Qe3 20.Kb1-+) 18...0-0-0 (better is 18...Qe3!? 19.Nd2 Qd4 20.Qe2 Kd7 21.Ra2-+) 19.Qg4 (19.Bc4 Qe3 20.Qd2 Qd2 21.Nd2 dc4-/+) 19...Kb8 (19...Rd7 20.Bc4 Qe3 21.Kb2 dc4 22.Rf1-+) 20.Qf4 (20.Rh3 Ne3 21.Qf3 Qg1 22.Kb2 Nc4 23.Bc4 Qd4 24.Nc3 Qc4 (24...dc4? 25.Rd1+-) 25.Qf7 Qg4-+) 20...Qe3 21.Qe3 Ne3 22.Nc3 c6 23.Re1 Nc4 24.Bc4 dc4 25.Kb2 g6 26.Rh1 Bg7 27.Ne2 Rhe8 28.Rae1 Re4 29.h6 Bh8 30.c3 b5 31.Ng3 Ree8 32.Ne4 f5 33.Nc5? f4 34.Na6 Kb7 35.Nc5= Kc8 36.a4 f3 37.Rhf1 Re1 38.Re1 g5 39.Kc2 g4 40.Ne4? Re8 41.a5?? g3!-+ 42.Nd6 Kd7 43.Re8 f2 44.Rh8 Kd6 45.Rf8 g2 46.Rf2 g1Q 47.Rd2 Qg6 48.Kb2 Qh6 49.a6 Qd2 50.Kb1 Kc7 0–1. willi_weizenkeim – FabianW, playchess.de, 2002.

5.Nf3 Bg4 6.Be2 e6 7.h3 Bh5 8.d4 Be7 9.c4 dc4 10.Bc4 b5 11.Be2 Nb8 12.Nbd2 c6 13.Rc1 Qb6 (13...a5 14.g4 Bg6 15.Ne5=) 14.0-0 0-0 15.Ne5 Exerts pressure on the backward pawn (15.Qc2 a5=) 15...Be2 16.Qe2 Rc8 (16...a5 17.ba5 Ra5 18.Qf3=) 17.Rc2 (17.Nb3 Nbd7+=) 17...Nbd7 18.Nd7 Nd7 19.Nf3 (19.Nb3!?+/–) 19...a5= 20.ba5 Ra5 21.Rc3 b4 (21...Qa6 22.Ra1+=) 22.ab4 Qb4 23.Rfc1 Ra2 24.R3c2 Nb8 25.Qd2 Qd2 26.Nd2 Bb4 27.Nc4 (27.Bc3 Rc2 28.Rc2 Be7+=) 27...h6 28.Bc3 Rc2 29.Rc2 Bc3 30.Rc3+= Na6 31.Na5 c5 32.dc5 Rc5= 33.Rc5 Nc5 34.Nc4 f6 35.Kf1 Kf7 36.Ke2 e5 37.f3 g5 38.e4 Ke6 39.Ne3 Nb3 40.Nf5 Nd4 41.Nd4 ed4 42.Kd3 Ke5 43.g3 h5 44.Ke2?? h4 45.gh4 gh4 46.Kd3 Kf4 47.Kd4 Kf3 48.Kd3?? Kg3 49.Ke3 Kh3 50.Kf3 Kh2 51.Kf2 Kh3 52.Kf3 Kh2 53.Kf2 Kh3 54.Kf3= ½–½. Fournier,Frederic – prisha (1710), Active, 2007.

5.Bb5+- a5?? 6.Bc6+- Bd7 7.Ba8 Qa8 8.ba5 d4 9.Bd4 (better 9.Nf3 de3 10.fe3 Qa5 11.0-0+-) 9...Qg2 10.Qf3 Qf3?? (10...Bc6 11.Qg2 Bg2+-) 11.Nf3 Bc6 12.Ke2 Nd5 (12...Nd7 13.Bb2+-) 13.Nc3 (13.Rg1 Rg8+-) 13...Nc3 14.Bc3 e6 (14...f6 15.Rhb1+-) 15.Rab1 f6 16.Rb8 Kf7 17.a6 (better 17.Rc8 Bb5 18.d3 Ba6 19.Rc7 Kg6+-) 17...g6 (17...Rg8 18.Rhb1 Ba3 19.a7+-) 18.a7 Bg7 19.Rh8 Bh8 20.Rb1 Bg7 21.Rb8 e5 (21...g5 22.Rc8 Kg6 23.Nd4+-) 22.a8Q (better 22.Rc8!? Bd5 23.Rc7 Kg8+-) 22...Ba8 23.Ra8 e4 24.Nd4 Bf8 25.Ra7 Bd6 26.Bb4 (26.Nb5!? Bh2 27.Nc7 Bc7 28.Rc7 Ke6 29.Rh7 f5+-) 26...Bh2 27.a4 (27.Ba5 h5+-) 27...Ke8 28.a5 (better 28.Ne6 h5+-) 28...Kd8 (28...Kd7 29.a6 Be5 30.Rb7 Bd4 31.ed4+-) 29.Ne6 Kc8 30.a6 Kb8 31.Rb7 Kc8 32.Nc5 Bd6 33.d4 (33.a7 Kd8 34.a8Q Ke7 35.Qg8 Bc5 36.Bc5 Kd7 37.Qd5 Kc8 38.Qc6 h5 39.Qc7) 33...h5 34.c3 (34.a7 Kd8 35.a8Q Ke7 36.Ne4 Bb4 37.Rc7 Ke6 38.Qc8 Kd5 39.Nf6 Kd6 40.Qd7) 34...h4 (34...Bc5 35.Bc5 h4 36.Rb4 h3 37.a7 c6 38.a8Q Kd7 39.Rb7 Ke6 40.Qc8 Kd5 41.Qg8) 35.Ne4 (35.a7 Kd8 36.a8Q Ke7 37.Qg8 Bc5 38.Rc7 Kd6 39.Qd8 Ke6 40.Qd7) 35...Bb4 36.cb4 h3 (36...Kd8 37.a7 Ke7 38.Rc7 Ke6 39.a8Q h3 40.Ng3 h2 41.Qc6) 37.Kf1 (37.Nc5 Kd8 38.a7 Ke7 39.a8Q h2 40.Rc7 Kd6 41.Qc6) 37...g5 38.Kg1 g4 39.Kh2 f5 40.Nc5 c6 (40...Kd8 41.a7 g3 42.Kg3 f4 43.Kf4 Ke7 44.Rc7 Kd6 45.a8Q Kc7 46.Qb7 Kd6 47.Qd7) 41.a7 (41.a7 g3 42.Kh3 gf2 43.a8Q) 1–0. Fournier,Frederic – memofe, Active, 2009.

5.Bb5+/– Qd7 6.Nf3+- a6? (better is 6...Bb7+-) 7.Ne5 Rb8 (7...Ne5 8.Bd7 Ned7 9.Bf6 Nf6+-) 8.Bc6 Kd8 9.Bd7 Bd7 10.Nf7 Ke8 11.Nh8 g6 12.Bf6 Bg7 13.Bg7 (13.Bg7 Rd8 14.c4 dc4 15.Qf3+-) 1–0. b4_player (2245) – filiforme, GameColony.com, 2003.

5.Bb5+/– Bd7 +/–.

5.Nf3 a6 6.c4 dc4 7.Bc4 g6 (7...Bg4!?=) 8.Ng5+/– Ne5 9.Qb3 Nc4 10.Qc4 Be6 11.Ne6 fe6 12.f4 Bg7 13.Be5 Qd5 14.Qe2 (worse is 14.Qc7 Qg2 15.Rf1 Nd5 16.Qb7 Nf4 17.Qg2 Ng2 18.Kf2 Be5-/+) 14...Rc8 15.0-0 0-0 16.Rc1 c6 17.Nc3 Qd7 18.Na4 Rcd8 19.d4 Rf7 20.Nb6 Qe8 21.Bc7 Rd7 (better is 21...Rd5!?+/–) 22.Nd7+- Qd7 23.Be5 Qd5 24.Rc5 Qe4 25.Rac1 Kh8 26.Kf2 (26.Qf3 Qf3 27.gf3 Nd7 28.Bg7 Kg7+-) 26...h5 (26...Nd5 27.Bg7 Kg7 28.R5c4+-) 27.h3 (27.Kg1 Nd5 28.Bg7 Kg7+-) 27...Kg8 (27...Nd5 28.Bg7 Kg7 29.g3+-) 28.g4 (28.Qc2!? h4+-) 28...hg4 29.hg4 Nd7 30.R5c3 (30.R5c4!? Ne5 31.de5 Qe5+-) 30...Be5+/– 31.de5 Ne5 32.Ke1 Nf3 33.Kd1 Rh7 34.Qd3 Rh1 (34...Rh2 35.Rb3+= (35.Qe4?? Rd2)) 35.Kc2+= Rh2 (35...Ne1!? 36.Re1 Qd3 37.Kd3 Re1+=) 36.Kb3 Nd2 37.Ka4 (better is 37.Kb2+/–) 37...Qf3?? (better is 37...Nc4! 38.Qd8 Kf7 39.Rc4 b5 40.Ka5 bc4=) 38.R1c2 (better is 38.Qg6 Kf8 39.Rd3 Qd5 40.Rd5 ed5 41.Qf5 Kg7 42.Qe5 Kf7+-) 38...b5?? (better is 38...Qd5 39.Qd5 ed5+- (worse is 39...cd5 40.Rc7+-)) 39.Ka5 Nc4 (39...Kf7 40.Rd2 Rd2 41.Qd2+-) 40.Rc4 bc4 (40...Kg7 41.Qd7 bc4 42.Qe7 Kg8 43.Rh2 Qd5 44.Kb6 Qd8 45.Qd8 Kg7 46.Qh8 Kf7 47.Rh7) 41.Qg6 Kf8 42.Rh2 Qd5 43.Ka6 Qb5 44.Ka7 Qa4 45.Kb7 Qb5 46.Kc7 Qb6 (46...Qe5 47.fe5 c3 48.Rh8) 47.Kb6 c3 48.Rh8 1–0. Holz auf der Heide,Gerhard (1865) – Plumbaum,Nadja, Leipzig VfB op, 2009.

5.Nf3 e5 6.b5 Na5 (6...e4 7.bc6 ef3 8.cb7 Bb7 9.Qf3+=) 7.Be5 Qc5 (7...Qe7 8.d3+-) 8.Bd4 (8.Bf6 gf6 9.d4 Qb6+-) 8...Qd6+- 9.Be2 (9.Bd3 Be7+-) 9...Be7 10.0-0 0-0 11.d3 (11.Be5 Qd7+-) 11...c5 12.bc6 (12.Be5 Qe6+-) 12...bc6 (12...Nc6 13.Bb2+-) 13.Bc3 (13.Qd2 Nb7+-) 13...Nb7 14.Nbd2 Bg4 (14...Qe6 15.Bb2+-) 15.d4 (15.Be5 Qe6+-) 15...Bd8 (15...Rfb8 16.Bb4 c5 17.dc5 Nc5 18.Nd4 Be2 19.Qe2+-) 16.Bb4 c5 17.dc5 Nc5 18.Nb3 (18.Rb1 a5 19.Nc4 Qc7 20.Bc5 Qc5+-) 18...Bb6 19.c4 (19.Re1 Rfe8+-) 19...Rad8 (19...Rfd8 20.Rc1+-) 20.cd5 (20.Rc1 Qc7+-) 20...Nd5 21.Bc4 (21.Rc1 Nb4 22.Qd6 Rd6 23.Nc5 Na2+-) 21...Nb4 (21...Bf3 22.Qf3 Nb4 23.ab4 Nb3 24.Bb3 Qb4 25.Bd5+=) 22.Qd6+- Rd6 23.ab4 (23.Nc5 Nc6 24.Ne4 Rg6+-) 23...Nb3+= 24.Bb3 Rfd8 (24...Bf3 25.gf3 Rfd8 26.Rfd1+=) 25.Rfd1 (better 25.Ne5 Be6 26.Be6 fe6 27.Rfc1+-) 25...Rd3? (better 25...Bf3 26.gf3 Rd3 27.Rd3 Rd3+=) 26.Rd3 Rd3 27.Bc4 (better 27.Bf7!? Kf8 28.Ne5+-) 27...Rc3+- 28.Bf1 (28.Ne5 Be6 29.Be6 fe6+-) 28...Rc2 (28...Bf3 29.gf3 h6 30.Rd1+=) 29.Ne5+- Be6 30.Nc6?? (better 30.b5+-) 30…Rc6-+ 0–1. Fournier,Frederic – NN, jeu.europe–echecs.com (3+0), 2013.

5.Nf3 Bg4!? =.

5.b5 Nb8 6.Be5 Bd6 7.Bd6 Qd6 8.Nf3 0-0 9.Be2 Nbd7 10.0-0 Ne5 11.Ne5 Qe5 12.d4 Qg5 13.g3 (13.Nd2 Bh3 14.Bf3 a6+/–) 13...Bh3 14.Re1 Ne4 15.Bf1 Bd7 16.Bg2 (16.Qf3 a6 17.ba6 b5+/–) 16...f5 (better is 16...Bb5!? 17.f3 Nf6=) 17.Qd3+/– Qh5 18.Nd2 Rae8 19.Ne4 (better is 19.Nf3+/–) 19...fe4= 20.Qf1 Bg4 21.a4 Bf3 22.Rec1 Rf7 23.c4 (23.Bf3 Rf3 24.c4 c6+=) 23...Ref8 (23...Be2 24.Qe1 Bc4 25.Rab1-/+) 24.cd5?? (better is 24.Rc2 c6 25.Bf3 Rf3 26.cd5 cd5 27.Rac1+=) 24...Bg2-+ 25.Qg2 Rf2 26.Qh1? (better is 26.Qf2 Rf2 27.Kf2 Qh2 28.Kf1 Qh1 29.Ke2 Qf3 30.Kd2 Qf2 31.Kc3 Qe3 32.Kc4 Qd3 33.Kc5 Qg3 34.a5-+) 26...Qe2 (better is 26...Rd2 27.Re1 Qh6-+) 27.Re1? (27.Qe4 Rh2 28.Rf1 Rhf2 29.Rf2 Qf2 30.Kh1 Qg3+=) 27...Qc2 28.Rac1 Qa2 29.Ra1 Qd5-/+ 30.Rf1? Qf5 31.Rfe1-/+ Qg4 32.Rf1?? Qe2 33.Rfe1 Qg4 34.Rf1 Qf5 35.Rfe1-/+ h6 36.Rad1 h5 37.Rc1?? h4 38.Rcd1 h3 0–1. Fournier,Frederic (1630) – dieguito (1730), Active, 2007.

5.b5 Nb8 6.Be5 Nbd7 +=..

5.b5 Nb8 6.Be5 Ne4 7.Nf3+/– Bg4 8.h3 Qh4? (better is 8...Be6+/–) 9.Nh4+- Bd1 10.d3 (10.Kd1?! Nf2 11.Ke1 Nh1 12.Bc7 Be7=; 10.Bc7?! Bc2 11.Nc3 Nc3 12.dc3 Nd7+/–) 10...Bc2 11.de4 Be4 (11...Nd7 12.Bc7 Rc8 13.Bf4+-) 12.Nc3 f6 (12...Nd7 13.Bc7 Rc8 14.Ne4 de4 15.Bh2+-) 13.Bg3 (13.Bc7 Nd7+-) 13...Nd7 (13...c6 14.f3 Bg6 15.Ng6 hg6 16.Bd3+-) 14.f3 (14.Bc7?! Rc8 15.Ne4 de4+-; 14.Ne4?! de4 15.Bc7 Rc8+-) 14...Bc2 (14...g5 15.fe4 gh4 16.Nd5+-) 15.Nd5 (15.Bc7?! Rc8 16.Kd2 Bb3+-) 15...0-0-0 16.Bc7 Re8 17.Rc1 Bb3 18.Bc4 Bc4 (18...Ba3 19.Rc3 (19.Bb3?! Bc1 20.Nf5 Nc5+-) 19...Bc4 20.Rc4+- (20.Ra3?! Bd5 21.Bg3 Ne5+/–)) 19.Rc4 b6 (19...Nc5 20.b6 a6 21.Nf5+-) 20.Bb6 Kb8 21.Ba7! Ka7 22.Rc7 Kb8 23.Rd7 Ba3 24.Rg7 Bd6 (24...Re5 25.e4 Rd8 26.0-0 Bc5 27.Kh1+-) 25.Nf5 Bc5 (25...Re5 26.e4 Rf5 27.ef5+-) 26.Nf6 Ba3 (26...Bb4 27.Kf2 Rc8 28.Rh7 Rh7 29.Nh7 Rc2 30.Kg3+-) 27.Ne8 Re8 28.Rh7 Bb4 29.Ke2 Rd8 30.Nd4 Re8 31.Nc6 1–0. Cirulis,Ilmars (1905) – Norris,Hugh (1800), FICGS, 2016.

5.b5 Bg4?? 6.f3+- Ba3? 7.Na3 Bf5 8.bc6 bc6 9.Ne2 (9.Be5 0-0+-) 9...a5 (9...Qe7 10.f4 ef4 11.Nf4+- (worse is 11.ef4 0-0+-)) 10.Ng3 Qc8 (10...Bg6 11.Be5 0-0 12.Be2+-) 11.Nf5 (better is 11.Be5 Qe6 12.Nf5 Qf5 13.Bc7 Qd7+-) 11...Qf5 12.Bd3 e4 (12...Qe6 13.f4! e4 14.Be2+-) 13.fe4 Ne4 14.Qf3 Qf3 15.gf3 Nd6 (15...Nf6 16.Rg1+-) 16.e4 (better is 16.Rg1 Ke7 17.Bg7 Rhb8 18.Bh7 Rb4+-) 16...de4 17.Be4 Ne4 18.fe4 a4 (18...0-0 19.Rf1 a4 20.d3+-) 19.Bg7 Rg8 20.Be5 1–0. Fournier,Frederic – COMP Demoschach, France, 2000.

5.b5 Bg4?? 6.f3+- Bc8 7.bc6 Bd6 8.cb7 Bb7 +-.

5.b5 Bg4?? 6.f3 Ne4 7.fg4 Qh4 8.g3 Ng3 +-.

5.b5 Bg4?? 6.f3 Bf3 7.Nf3 +-.

5.Bb5 a6 6.Ba4 Bd7 7.Bb3 Bd6 8.Nc3 Be6 9.Nce2 (9.Nce2 0-0 10.Nf3+=). babai (1630) – GazzaK, internet, 2008.

5.Bb5 Qd6 A) 6.Bc6 bc6 7.d3 (7.Nf3 e4 8.Ne5 c5 9.bc5+=; 7.c4 a5 8.Nf3 Nd7 9.c5=) 7...a5 8.Nd2 Bg4 9.Ngf3=; B) 6.d4 B1) 6...e4 7.c4 (7.Nd2 a6 8.Be2 Be7 9.c4+=; 7.Ne2 a6 8.Ba4 Be7 9.c4+=) 7...a6 8.c5 Qe6 9.Be2=; B2) 6...Nd7 7.Bc6 (7.Ne2 a5 8.0-0 ab4 9.ab4=; 7.Nf3 e4 8.Nfd2 a5 9.c3+=) 7...bc6 8.de5 Ne5 9.Nd2=; B3) 6...ed4 7.Bd4 (7.ed4 a5 8.Qe2 Be7 9.ba5+=; 7.Qd4 Bd7 8.Qd1 a5 9.Ba4+=) 7...a6 8.Bc6 Qc6 9.Nc3+=; C) 6.Nf3 C1) 6...e4 7.Ne5 (7.Nd4 Bd7 8.0-0 a5 9.ba5=) 7...a6 8.Bc6 bc6 9.c4=; C2) 6...Nd7 7.0-0 (7.d3 a5 8.ba5 f6 9.d4=; 7.Nc3 e4 8.Nh4 Nb6 9.Qh5=) 7...a5 8.d3 ab4 9.ab4=.

5.Bb5 e4 6.Nc3 A) 6...a5 7.Bc6 (7.ba5 Bd7 8.Nge2 Na5 9.Ng3+=; 7.Ba4 Bg4 8.f3 ef3 9.gf3+=) 7...bc6 8.ba5 Bd6 9.d3+=; B) 6...Bd6 7.Bc6 (7.d3 a5 8.de4 de4 9.Qd4+=; 7.Nge2 0-0 8.Bc6 bc6 9.0-0+=) 7...bc6 8.d3 Rb8 9.de4=; C) 6...Bd7 7.Nge2 (7.d3 a5 8.de4 de4 9.Nd5+=; 7.Bc6 Bc6 8.Nge2 Bd6 9.Nd4+=) 7...Bd6 8.0-0 a5 9.Bc6+=.

5.Bb5 e4 6.d3 A) 6...Bd7 7.Nd2 (7.Ne2 Bd6 8.de4 de4 9.Nd2=; 7.de4 de4 8.Nd2 a5 9.Bf6+=) 7...a6 8.Ba4 Be7 9.de4=; B) 6...Bg4 7.Ne2 (7.f3; 7.Qd2) 7...Bd7 8.de4 de4 9.Nd2=; C) 6...a5 7.Bc6 (7.ba5 Bd7 8.de4 de4 9.Nd2+=; 7.de4 Ne4 8.Nd2 Bd7 9.Ne4+=) 7...bc6 8.ba5 Rb8 9.Bc3=.

5.Bb5 e4 6.Ne2 A) 6...Bd6 7.0-0 (7.Bf6 Qf6 8.Nbc3 Qg5 9.h4+=; 7.Nd4 Bd7 8.Bc6 bc6 9.Nb3=) 7...a5 8.f3 ab4 9.ab4=; B) 6...Bd7 7.d3 (7.0-0 a5 8.Bf6 gf6 9.Nbc3=; 7.Bf6 Qf6 8.Nbc3 Qg5 9.0-0=) 7...Bd6 8.de4 de4 9.Nd2=; C) 6...a5 7.ba5 (7.Bc6 bc6 8.ba5 Bd6 9.d3+=; 7.Nd4 Bd7 8.ba5 Nd4 9.Bd7+=) 7...Bd7 8.Nf4 Ra5 9.Bf6=.

5.Bb5 Bg4 6.Bc6 bc6 7.Be5?? Bd1-+ 8.Kd1 Ne4 (better 8...Ng4 9.Bg3 Qf6 10.Nc3 Nf2 11.Bf2 Qf2 12.Nge2 Qg2 13.Rg1 Qh2 14.Rb1-+) 9.Nh3 Nf2! 10.Nf2 Qg5 11.Bg3 Bd6 12.Kc1 (12.Bd6 cd6 13.Nc3 Qg2-+) 12...Qf5 (better 12...Bg3 13.Nd3 Bd6 14.g3-+) 13.Rf1 (13.e4 Qh5 14.ed5 Bg3 15.hg3 Qe5-+) 13...Bg3 14.hg3 0-0-0 (better 14...a5!? 15.c3-+) 15.Nc3 Rhe8 16.Kb2 d4 (16...Qg5 17.Nd3 f5 18.Ne2-+) 17.ed4 Rd4 18.Nd3 Qg4 (18...Qg5 19.Rf7 Qd2 20.Rf2-+) 19.Rf3 (19.Rf7 Qg3 20.Rg1 h5-+) 19...h5 (19...Rd7 20.Raf1 f6 21.Rh1-+) 20.Raf1 h4 (20...f6!? 21.Re3 Re3 22.de3 Rd3 23.cd3 Qg3 24.Ne4 Qg2 25.Rf2-+) 21.Rf7 (21.gh4 Qg2 22.R1f2 Qg4 23.Rf7 Qh4-+) 21...hg3 (21...Qg3 22.R1f2 Qg6 23.Rf8-+) 22.Nc5? (better 22.Kc1-+) 22...Rd2 23.Rf8 Kd8 (better 23...Qg6 24.N3e4 Rg2-+) 24.Nb7= Ke7?? (24...Kc8 25.Nc5 Qg6-+) 25.R1f7+- Ke6 26.Nc5 Kd6 (26...Ke5 27.Re8 Kd4 28.Nb3 Kc4 29.Nd2 Kd4 30.Rd7 Qd7 31.Re4) 27.Re8 Qh5 (27...Rc2 28.Kc2 Qg6 29.N5e4 Qe4 30.Ne4 Kd5 31.Rd7 Kc4 32.Rb8 c5 33.Nd2) 28.Rd7 1–0. alt20 – NeivaldoGhedim, lichess.org, 2015.

5.Bb5 Bg4 6.Bc6 bc6 7.f3 Be6 (7...Bf5 8.Be5 a5 9.ba5 Nd7 10.Bg3 Ra5+=; 7...Bd7 8.Be5 c5 9.Nc3 c6 10.Rb1 Nh5+=) 8.Be5 Nd7 9.Bf4 a5 10.ba5 Qf6+=.

5.Bb5 Bg4 6.f3 Bd7 7.Bc6 e4?? (better is 7...Bc6 8.Be5 a5 9.ba5 Ra5 (9...Nd7+= 10.Bd4 Bd6+=) 10.Ne2 Bd6=) 8.Bf6 Bc6 (8...Qf6 9.Bd7 Kd7+-) 9.Bd8 (9.Bd8 Rd8 10.Nc3+-) 1–0. pierre – gmmutti, internet, 2008.

5.Nc3 Bd6+= 6.Bb5 0-0 7.Bc6 bc6 8.b5 (8.Nf3 a5+=) 8...c5 (8...Rb8 9.a4-+) 9.Nf3 (9.Rb1 Rb8-/+) 9...e4 10.Ng5 (better is 10.Ng1-/+) 10...d4?? (10...h6 11.Nh3-/+) 11.ed4?? (11.Nce4 Rb8 A) worse is 12.ed4 A1) 12...Rb5?! 13.dc5 (worse is 13.Nd6 Qd6 14.Qc1 Re8 15.Kf1 cd4-+) 13...Ne4 14.Ne4=; A2) 12...Re8 13.d3 Ne4 14.Ne4 f5-/+; B) 12.a4+=) 11...cd4-/+ 12.Nd5? (better is 12.Ne2 h6 13.Nh3 Bh3 14.gh3-/+) 12...Nd5-+ 13.Ne4 (13.h4 Bc5-+) 13...Qe7 14.d3 Bf4 (better is 14...f5 15.Bd4 fe4 16.0-0-+) 15.Bd4 (15.0-0 f5 16.Nd2-+) 15...Bf5 (better is 15...f5 16.Qh5 g6-+ (16...fe4?! 17.Qd5 Be6 18.Qe4-/+)) 16.Bc5 (better is 16.0-0-+) 16...Qh4?? (better is 16...Bd6 17.Bd6 cd6-+) 17.Bf8 (17.g3 Qh3 18.gf4 Be4 19.de4=) 17...Be3?? (17...Rf8 18.g3 Qe7+=) 18.g3+- Bf2?? 19.Nf2 Qg5?? 20.Bc5 Re8 21.Qe2 Re2+= 22.Ke2 Nc3 23.Kf1 Qf6 24.Ba7 Bh3+= 25.Kg1?? Ne2 0–1. Pekin Dragons – interloper, ChessWorld.net, 2011.

5.c4 dc4 6.Bc4 a6 7.Nf3 b5 8.Bb3 h6 9.Ne5 Ne5 10.Be5 Ng4 (10...Bd6!? 11.d4 Be5 12.de5 Qd1 13.Bd1 Nd7+=) 11.Bb2 Bb7?? (better is 11...Nf6+-) 12.Qg4 h5 (12...Qd3 13.Bc3+- (13.Bg7 Rg8 14.Bf7 Kf7 15.Qf4 Kg7 16.Qc7 Kh8 17.Qb7 Bg7-/+)) 13.Qf5 f6 (13...Qd7 14.Qe5 Qe7 15.Qg3+-) 14.Qg6 Kd7 15.Qf7 (15.0-0!? Qe8 16.Qf5 Kd8+-) 15...Kc8 (15...Qe7 16.f3+-) 16.0-0 Qe7 17.Nc3 Qf7 18.Bf7 Be7 (18...Kd7 19.Rfc1+-) 19.Rac1 h4 (19...Kd7 20.d4+-) 20.Nd5 Bd5 21.Bd5 Ra7 (21...Rb8 22.Rc6 Rb6 23.Rb6 cb6 24.Rc1 Kd7 25.Bb7+-) 22.Bd4 Rd8 (22...c5 23.bc5 Rc7 24.e4+-) 23.Be6 Kb8 (23...Kb7 24.Ba7 Rd2 25.Bd4+-) 24.Ba7 Ka7 25.Rc7 (25.Rc7 Kb8 26.Re7 Rd2 27.Rc1+-) 1–0. mgriffin (1640) – tbear (1640), net–chess.com, 2001. (=1.a3 d5 2.b4 Nf6 3.e3 Nc6 4.Bb2 e5)

5.c4 dc4 6.Bc4 Bd6 7.Nf3 0-0 8.Nc3 Re8 (8...e4 9.Ng5 Ne5 10.Be2=+) 9.Qc2 h6 10.0-0 e4 11.Nh4 g5 (11...Bh2 12.Kh1 Bd6 13.d4-+) 12.Ng6? (better 12.Nf3 ef3 13.Qg6 Kh8 14.Bf7 fg2 15.Qh6 Nh7 16.Kg2=) 12...Kg7?? (12...Bf5 13.f3 Bg6 14.Ne4 Ne4 (14...Be4?! 15.fe4 Ne5 16.Ba2=+) 15.fe4 Ne5-+ (15...Be4 16.Rf7 Be5 17.Be5 Re5 18.Rd7 Kf8 19.Rd8 Rd8 20.d3+-)) 13.Ne4 (better 13.Nd5 Ne5 14.f4 gf4 15.Nf6 Qf6 16.Nf4+-) 13...Re4= 14.Qe4 fg6 15.f4 Bf5 (better 15...gf4!? 16.Qd5 Qf8=) 16.fg5 hg5? (better 16...Be4 17.Bf6 Kh7 18.Bd8 Rd8 19.Rf7 Kh8+=) 17.Rf5+- gf5 18.Qf5 (18.Qf5 Bh2 19.Kh2 Qd6 20.Kg1+-) 1–0. FeegLood (2815) – Bombegranate (2850), lichess.org, 2017.

5.c4 dc4 6.Bc4 Bf5 7.Nc3 Bc5?? (better is 7...Bd3 8.Qb3 Qd7+=) 8.bc5+- 0-0 9.Nge2 Ne4 (9...Bd3 10.Qa4+-) 10.Ne4 Be4 11.f3 (11.0-0 Na5 12.Ba2 Qg5+-) 11...Bg6 (11...Bf3 12.0-0 Bd5 13.Bd5 Qd5 14.Qc2+-) 12.Qb3 (12.Bb5 Qg5+-) 12...b6 (12...Na5 13.Qb4 Nc4 14.Qc4+-) 13.cb6 (13.Qc3 a6+-) 13...cb6 14.d4 (14.Qa4 Na5 15.Ba6 Re8+-) 14...Re8 (14...Na5 15.Qb4 Nc4 16.Qc4 Qg5+-) 15.de5 (15.Bb5 Rc8+-) 15...Ne5? (better is 15...Na5 16.Bf7! Bf7+/–) 16.Be5+- Re5 17.Rd1 Qe7 (17...Qh4 18.g3 Qe7 19.e4+-) 18.e4 b5 (18...b5 19.Bd5 Re8+-). mgriffin (1815) – yvesr (1660), net–chess.com, 2001. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 dc4 6.Bc4 Bf5 7.Nf3 Bd6 8.d3 0-0 9.0-0 Bg4 (9...h6 10.Nc3=) 10.Nbd2 Qe7 11.h3 Bh5 (11...Bd7 12.Qe2+=) 12.g4 Bg6 13.Nh4 Rad8 14.Qf3 a6 15.Rfc1 Rfe8 16.Ng6 hg6 17.g5 Nd7 18.Ne4 Nf8 19.h4 Ne6 20.Kg2 Nb8 (20...Rb8 21.Rh1 b5 22.Be6 Qe6 23.h5+-) 21.Rh1+- White intends h5 21...c5? (better 21...Nc6+-) 22.h5 Ng5 (22...b5 23.bc5 bc4 24.cd6 Rd6 25.Nd6 Qd6 26.hg6 fg6 27.dc4 Ng5 28.Qd5 Qd5 29.cd5 Nd7+-) 23.Qg4 Ne4 24.hg6 (24.de4?! g5 25.h6 g6+=; 24.Qe4?! Qg5 25.Kf1 b5+/-) 24...Qg5 25.gf7 Kf8 26.Rh8 Ke7 27.Qg5 Ng5 28.Re8 Re8 29.fe8Q Ke8 30.bc5 Bc7 31.d4 Nc6 (31...Nd7 32.a4+-) 32.d5 Na5 33.Ba2 Kd7 (33...Ne4 34.Rc1+-) 34.Rc1 Nf7 (34...Bb8 35.Bc3 Bc7 36.Rg1+-) 35.d6 (35.d6 Nd6 36.cd6 Bd6 37.Kf3+-) 1-0. PierrE – DieGrande, internet, 2022.

5.c4 Ne4 6.Nc3 (6.d3 Ng5 7.b5+=) 6...Bf5 (6...Nc3!? 7.dc3 dc4 8.Qd8 Nd8 9.Bc4 Be6=) 7.Nd5 (better is 7.cd5 Nb8 8.Bb5 c6 9.dc6 bc6 10.Ne4 Be4 11.Bf1+/–) 7...Nf2?? (better is 7...Bd6+=) 8.Kf2+- Qh4 (8...Bd6 9.Nf3+-) 9.g3 Qg4 (9...Qd8+-) 10.Qg4 Bg4 11.Nc7 Kd7 12.Na8 Bd6 (12...Be7 13.b5 Na5 14.Be5+-) 13.Nb6! ab6 14.Be2 Bf5 15.Nf3 e4 16.Ng5 (16.Nh4 Be6 17.Bg7 Rg8+-) 16...Bg6 (16...f6 17.Nf7 Ra8 18.Nd6 Kd6 19.Rhd1+-) 17.Bg7 Re8 18.Rad1 (better is 18.Rhf1 Be5 19.Be5 Ne5+-) 18...Re5 (18...f6 19.Nh3+-) 19.Be5 Ne5 20.d4 White plans c5 (better is 20.Nh3 Nd3 21.Bd3 ed3+-) 20...Nc6 21.c5 bc5 22.dc5 Ne5 23.Rd6 Ke7 24.Rhd1 h6 25.Nh3 Bf5 26.Nf4 Bg4 27.Bg4 Ng4 28.Ke2 Nh2 29.Rd7 Kf6 30.R1d6 Ke5 31.Re7 Kf5 32.Rf7 Ke5 33.Ng6 1–0. rommeltdf (1780) – ofi, net–chess.com, 2002. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 Be6 6.Nf3 e4 (6...dc4 7.b5 Na5 8.Be5+=) 7.Nd4 (7.Ng5 Bg4 8.Be2 Be2 9.Qe2 h6 10.cd5 Qd5+= (worse is 10...hg5 11.dc6 bc6 12.Nc3+/–)) 7...Nd4+= 8.Bd4 dc4 9.Nc3 Nd5 (better is 9...Be7!?+=) 10.Ne4= Bf5 (10...Nf4 11.Nc5 Bc5 12.Bg7+=) 11.Ng3 (11.Qf3 Be6+/–) 11...Bg6 (11...Bd3!?+/–) 12.Bc4 Qd6 (12...Nb6 13.Bb3+/–) 13.0-0 Qe6?? (better is 13...Nb6 14.Qf3 c6+-) 14.e4! Be4 15.Ne4 Qe4 (15...Qd7+-) 16.Re1 Ne3 (16...Qe1 17.Qe1 Ne7+-) 17.Re3 (17.Re3 Qe7 18.Qa4 c6 19.b5 Qe3 20.de3+-) 1–0. thedesertfox (1750) – choffman, net–chess.com, 2004. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 Bf5 6.d3 (6.b5 Na5 7.cd5 Qd5 8.Nf3=) 6...Be7 (6...dc4 7.b5 Na5 8.e4-/+) 7.Nc3 (7.cd5 Qd5 (worse is 7...Nd5 8.b5 Na5 9.e4+-) 8.e4 Ne4 9.de4 Qe4 10.Qe2 Nd4 11.Qe4 Be4+=) 7...Bg4 (7...d4 8.Nd5 a6 9.Nf3=) 8.f3 (8.Be2 d4 9.ed4 Qd4 10.Bg4 Qg4 11.Qg4 Ng4 12.Nd5+=) 8...Bf5 (better is 8...Be6!?=) 9.cd5+/– Nd5 (better is 9...Nb8!?+/–) 10.Nd5+- Qd5 11.e4 Qe6 12.ef5 Qf5 13.Ne2 0-0-0 (13...a6 14.f4+-) 14.Ng3 (14.b5!? Nd4 15.Nd4 ed4+-) 14...Bh4+/– 15.Kf2 e4 16.Qd2 (16.de4?! Bg3 17.hg3 Rd1 18.ef5 Rd2 19.Ke3 Rb2=) 16...Rhe8 (16...ef3 17.gf3 (17.Bg7?! Rhg8 18.Bc3 Ne5=) 17...Nd4 18.Bd4 Rd4 19.Rc1+/–) 17.Re1+- Re6 18.Kg1 Bg3 19.hg3 ef3 (19...ed3 20.Rd1+-) 20.Re6 (20.gf3 Kb8+-) 20...fe6 (better is 20...fg2 21.Qg2 fe6+-) 21.Bg7 (21.gf3 Rd7+-) 21...Nd4? (better is 21...Rg8 22.b5 Qb5+/–) 22.Bd4+- Rd4 23.Kf2 (23.gf3 Qf3 24.Qf2 Qf2 25.Kf2 Rd7+-) 23...e5? (better is 23...fg2 24.Kg2 Qd5 25.Kg1 Qe5+-) 24.gf3 Kb8 25.g4 Qf7 26.Qh6 Rg4 27.Qh7 Threatening mate: Qxf7 27...Qa2 28.Ke3 Rg8 29.Rh6 Rc8 30.Bh3 Qa1 Do you see the mate threat? 31.Bc8?? Qe1 0–1. babai – scheisster, internet, 2007.

5.c4 Bg4 6.Qc2 Be7 7.b5 Na5 8.Be5 Nd7?? (better is 8...dc4 9.Bc3 c6 10.bc6 bc6=) 9.Bg7+- Rg8 10.Qh7 (10.Qh7 Rg7 11.Qg7+-) 1–0. Wall,Bill – Laprade,Maria, Palm Bay, FL, 2003.

5.c4 Bg4 6.Be2 dc4?? (better is 6...Be2 7.Ne2 dc4+=) 7.Bg4+- Ng4 8.Qg4 f5? (8...Qd3+-) 9.Qf5 Ne7 (9...Qd5 10.Nf3 g6 11.Qf6+-) 10.Qe5 Qd5 11.Qd5 (11.Nf3 c6+-) 11...Nd5 12.Nf3 Rd8 (12...a5 13.b5+-) 13.Nc3 Nf6 (13...Nb6 14.Rc1+-) 14.0-0-0 (14.Ne5 c6+-) 14...Bd6 15.Nb5 c3 (15...a6 16.Nd6 Rd6 17.Ne5+-) 16.Nd6 (16.dc3 a6 17.Nd6 cd6+-) 16...Rd6 17.Bc3 g5 (17...Ne4 18.Rdf1+-) 18.Bf6 (better is 18.e4!? Rc6+-) 18...Rf6 19.Ng5 Ra6 (19...Rf2 20.Rhg1+-) 20.Kb2 Rg8 21.f4 Rb6 (21...h6 22.Ne4 Rg2 23.f5+-) 22.g3 Rb5 (22...h6 23.Ne4+-) 23.Kc3 (23.Nh7 Rg6+-) 23...Rd5 (23...h6 24.Nf3+-) 24.Nh7 Rg7 (24...Rg6 25.d4 Ra6+-) 25.Nf6 Ke7 26.Nd5 Ke6 27.e4 Rd7 28.d4 Rd5 (28...Rd5 29.ed5 Kd5+-). rommeltdf (1800) – dschultz, net–chess.com, 2002. (=1.a3 e5 2.b4 Nc6 3.e3 d5 4.Bb2 Nf6)

5.d3 Bd6!? +=.

5.d3 g6 6.Nf3 Bf5 7.Be2 (7.b5 Nb8+/–) 7...a5 8.c3 (8.b5!? Na7 9.Ne5+/–) 8...ab4 9.cb4 Be7 (9...Bd6 10.b5 Na7 11.Ne5 Nb5 12.g4+=) 10.Nbd2 (10.Ne5 Ne5 11.Be5 0-0+/–) 10...0-0 (10...Bd6 11.b5 Na7 12.Ne5 Nb5 13.g4+=) 11.0-0 Nd4?? (better is 11...e4 12.de4 de4+=) 12.ed4+- ed4 13.Nd4 Bd3 (13...Bd7+-) 14.Bd3 Qd6 15.N2f3 Ne4 16.Be4 (16.Qc2 c5 17.Be4 de4 18.bc5 Qd5+-) 16...de4 17.Nd2 Qd4 (17...f5+-) 18.Bd4 Bg5 19.Bb2 (better is 19.Ne4!? Be7 20.Qc1 c5 21.Bc5 Bc5 22.bc5 Rfd8+-) 19...Bd2 20.Bc1 (better is 20.Qd2 Rae8+-) 20...e3 (20...Bc3 21.Rb1 Rfe8 22.Qb3+-) 21.fe3 Bc1 22.Qc1 Rfd8 23.Re1 Re8 24.Qb2 Re4 25.Qe2 Rd8 26.Rad1 Ra8 27.Rd4 Re3 28.Qe3 Ra5 29.ba5 b6 30.ab6 cb6 31.Qe7 b5 32.Qe8 1–0. Fournier,Frederic (1915) – desigallango, Active Blind, 2007.

5.d4 ed4 6.b5 de3 7.bc6 ef2 8.Kf2 Ne4 9.Ke2 bc6 10.Qd4 +=.

5.d4 ed4 6.Nf3 de3 7.Nd4? (better is 7.fe3 Ng4 8.b5 Ne3 9.Qc1-+) 7...ef2 (7...Ne4!? 8.fe3 Qh4 9.g3 Ng3 10.hg3 Qh1 11.Nc6 bc6 12.Qd4-+) 8.Kf2 Ne4 9.Ke3 (9.Kg1 Qf6 10.Qf3-+) 9...Bd6 (better is 9...Qg5 10.Ke2 Qf6 11.Nf3 Qb2 12.Qd5 Qc2 13.Ke3-+) 10.b5 (10.Qe1 Qg5 11.Ke2-+) 10...Qg5 11.Kd3 Nf2 (11...Bg4 12.Nf3 Ne5 13.Be5 Nf2 14.Kc3 Qe3 15.Bd3 Be5 16.Kb3 Nd1 17.Nc3 Bc3 18.Rad1-+) 12.Ke2 Bg4 (12...Nd1 13.Nf3 Bg4 14.Kd1-+) 13.Nf3 (13.Kf2 Bd1 14.bc6 bc6-+) 13...Nd1 14.Kd1 Ne5 (14...Qe3 15.Nbd2 Nd4 16.Bd3 Bf3 17.Nf3 Nf3 18.gf3 Qf3 19.Kd2 Qf4 20.Kc3-+) 15.Be2 Nf3 16.gf3 Bf3 17.Bf3 0-0 18.Nc3 Rae8 19.Nd5 c6 20.bc6 bc6 21.Nc3 Rd8 22.Bc6 Bh2 23.Nd5 Qg4 24.Kd2 Qg2 25.Kc3 Be5 26.Kc4 Qc2 27.Bc3 Bc3 28.Ne7 Kh8 29.Rag1 Bf6 30.Kb5 Be7 31.Rg4 Qc5 32.Ka6 Qc6 0–1. klittlefield – dengel, net–chess.com, 2000.

5.d4 e4 6.Bb5 (6.c4 Bg4 7.Qc2 Ne7=) 6...a6 7.Bc6 bc6 8.Ne2 Bg4 (8...Rb8 9.Nd2=) 9.h3 Be2 (9...Bc8 10.Nd2=) 10.Qe2 Bd6 (10...Qb8 11.Nd2=) 11.0-0 (11.c4 a5+=) 11...g6 (11...0-0 12.c4+=) 12.c4+= 0-0 13.c5 Be7 14.Nd2 Nh5 15.f3 (15.g4 Ng7=) 15...f5 (15...Ng3 16.Qf2 Nf1 17.Rf1-+) 16.fe4 (16.Qe1 Rb8+=) 16...fe4?? Black creates threats along the open f–file (better is 16...Ng3 17.Qd3 Nf1 18.Rf1 fe4-+) 17.Rf8 Qf8 18.Rf1 (18.Re1 Qf6=) 18...Qg7 (18...Qh6 19.Kh2=) 19.Qg4 Rf8 (19...Kh8 20.Qe6 Bg5 21.Re1=) 20.Qe6+/– Rf7 (20...Kh8 21.Rf8 Qf8 22.Qe5 (22.Qc6 Bh4 23.Kh1 Qf2 24.Qe8 Kg7 25.Ne4 de4 26.Qe7 Be7 27.d5 Qb2 28.d6 Ng3 29.Kh2 Nf1 30.Kg1 Ne3 31.de7 Qg2) 22...Bf6 23.Qc7+/–) 21.Rf7 (21.Qc6 Ng3 22.Qe8 Rf8 23.Rf8 Qf8 24.Qf8 Kf8+=) 21...Qf7+= 22.Qc6 (22.Qc8 Kg7 23.Qa6 Ng3+/–) 22...Bg5 (22...Bh4 23.Kh1 Be1 24.Ne4 de4 25.Qa8 Kg7 26.d5 Kh6 27.Qa6 Qd5 28.Qc8-+) 23.Nf1= Bh4 24.Qa8? (24.g3 Ng3 25.Qa6=) 24...Kg7-+ Threatening mate... how? 25.Qa6 Bf2 (25...Qf2 26.Kh1 Ng3 27.Ng3 Bg3-+) 26.Kh1+- Ng3 (26...Be3 27.Ne3 Qf2 28.Bc1 Ng3 29.Kh2+-) 27.Ng3 Bg3 28.b5?? (better is 28.Qe2+-) 28…Qf1 0–1. CSLewis – xyzzy, ChessWorld.net, 2005.

5.Ne2 Bd6 6.Ng3 +=.

5.Ne2 Bg4 6.h3 (6.b5 Na5 7.Be5 Nc4+=) 6...Bh5 (6...Be2 7.Be2 Bd6 8.0-0=) 7.Nbc3 (7.b5!? Na5 8.Be5+=) 7...d4+= 8.ed4 Nd4 9.g4?? (9.f3 Bg6 10.Nd4 Qd4+=) 9...Bg6 (9...Nf3) 10.Rg1?? (better is 10.Nd4 Qd4 11.Bg2=) 10…Nc2 (10...Nc2 11.Qc2 Bc2-+; 10...Nf3) 0–1. keeder – Zbicyclist, ChessWorld.net, 2010.

5.Nf3 d4 6.ed4 (6.b5 Na5+=) 6...ed4 (6...e4 7.Qe2 Be7 8.Ne5+=) 7.Qe2 (7.Bb5 Qd5 8.Qe2 Kd8+/–) 7...Be7+= 8.d3 (better is 8.b5 Nb8 9.Bd4+=) 8...0-0-/+ 9.Nbd2 Re8 10.0-0-0 (better is 10.Ne4 b5 11.Rc1-/+) 10...a5 11.ba5 Ra5 (11...Nd5 12.Ne4-+) 12.Nb3 (12.Ne4 Ng4 13.h3 Nge5-+) 12...Ra6 (12...Ba3?! 13.Na5 Re2 14.Nc6 Bb2 15.Kb2 Rc2 16.Kc2 bc6 17.h3-+) 13.Nfd4 (13.Qd2 Ba3 14.Ba3 Ra3 15.Kb2-+) 13...Nd4 14.Nd4 (14.Qd2 Ba3 15.Ba3 Ra3-+) 14...Ba3 (14...Ra3?! 15.Qf3-+) 15.Ba3 Ra3 16.Nb3 Bg4 (16...Bg4 17.Qd2 Bd1 18.Qd1 Nd5-+) 0–1. Fournier,Frederic (1930) – Viktor7 (1770), Active, 2004.

5.Nf3 Be6 6.b5 a6?? (6...e4 7.bc6 ef3 8.cb7 (worse 8.gf3 bc6 9.c4 Rb8=+) 8...fg2 9.Bg2+= (worse 9.ba8R gh1Q 10.Rd8 Kd8 11.Bf6 gf6=+)) 7.Ne5 (better 7.bc6 bc6 8.Ne5+-) 7...Ne5+= 8.Be5 a5 (8...ab5 9.Bb5 c6 10.Be2+=) 9.a4 b6 10.Bb2 Be7 11.Nc3 0-0 12.Ne2 Ne4 13.Nd4 Bd7 14.g3 Nc5 (14...Bb4 15.c3 Bc5 16.Bg2+-) 15.d3 Qc8 16.Bg2 Bg4 17.Qd2 Bg5? (17...Qd7 18.Nc6+-) 18.Nc6 (18.Bd5 Rb8+-) 18...h6 (better 18...Qe6+-) 19.h4 Bf6 (19...Bd8 20.Bd5 Qd7+-) 20.Bf6 gf6 (20...Qe6 21.Bd4 Qd6+-) 21.Ne7 Kh7 22.Nc8 Rac8 23.Bd5 c6 (23...Rfd8 24.Bg2+-) 24.e4 (better 24.Bc6 f5 25.Qc3+-) 24...cd5 (24...Bf3 25.Qf4 Bh1 26.bc6+-) 25.Qf4 (25.Qf4 Rg8 26.ed5 Rce8 27.Kf1+-) 1–0, time forfeit. FeegLood (2215) – WhyDoIPlayChess, 2015

5.Nf3 Be6 6.Ne5+= Bd6 7.Nc6 bc6 8.Be2 0-0 9.d3 (9.0-0 c5+=) 9...Re8 10.Nd2 Bf5 (10...c5 11.bc5 Bc5 12.c4+=) 11.Nf3 Qe7 12.0-0 Be5?? (better is 12...a5+/–) 13.Ne5 Ng4 (13...Qd6 14.Nf3+-) 14.Nc6 (14.Bg4 Bg4 15.Qg4 Qe6+-) 14...Qe6 (14...Qg5 15.Nd4 Bd7 16.Nf3+-) 15.Bg4 (better is 15.Nd4 Ne3 16.Qc1 Qg6 17.fe3 Bh3+-) 15...Bg4 16.f3 (16.Nd4!? Qg6 17.Qd2 Rab8+-) 16...Bh5 (16...Qe3 17.Kh1 Bd7 18.Nd4+-) 17.Nd4 Qg6 (17...Qe3 18.Kh1 f6 19.Re1+-) 18.Ne2 (better is 18.g4!? Qg5 19.Nf5 f6+-) 18...Re3 19.Ng3 (19.g4 Bg4 20.fg4 Qg4 21.Kf2 Rh3+-) 19...Rae8 (19...Qb6 20.Kh1 (20.Nh5?! Re1 21.Kh1 Rd1 22.Rfd1 d4+-) 20...Bg6 21.Ne2+-) 20.Nh5 (20.Bd4 R3e6+-) 20...Qh5 21.Bd4 R3e6 22.Qd2 Rh6 23.h3 Qh4 24.Rae1 Qd4+/– 25.Kh1 Re1 26.Re1 f6? 27.Qe3 Qe3+/– 28.Re3 Kf7 29.c3 f5 30.Kg1 Ra6+/– 31.Re5 Ra3 32.Rf5 Ke6= 33.Rg5 g6 34.Rg4 Rc3+= 35.d4 Rb3-+ 36.Kf2 Rb4 37.Rh4 a5 38.Rh7-/+ a4 39.Rc7 a3 40.Ra7 Rb2 41.Kg3 a2 42.Ra6 Kf5 43.h4 g5 44.hg5 Kg5= 45.Kh3 Kf4 46.Ra5? Ke3-/+ 47.Ra4 Rd2 48.g4 Rd4 49.Ra2= Kf3 50.Ra3 Kf4 51.Rg3 Kg5 0–1. Fournier,Frederic (1915) – domimus, Active, 2005.

5.Nf3 Be6 6.Ne5+= Ne5 7.Be5 Bd6 8.Bb2 0-0 9.f4 Ne4 10.Be2?? (better is 10.Qh5=) 10...Qh4-+ 11.g3 Ng3! 12.hg3 (12.hg3 Qh1 Pinning (12...Qh1 Deflection)) 12...Qh1 13.Kf2 (13.Bf1-+) 13...Qh2 14.Kf1 (14.Kf3 g5! 15.e4 Bf4 16.gf4 de4 17.Ke3 Qf4 18.Kd4 Rad8 19.Kc3 Qe5 20.d4 ed3 21.Kd2 de2 22.Bd4 Rd4 23.Ke1 Qg3 24.Ke2 Re4 25.Kd2 Qe3) 14...Bh3 15.Ke1 Qg1 (15...Qg3) 16.Bf1 Qf1 0–1. Fournier,Frederic – fritzman, Active, 2007.

5.Nf3 Be6 6.Ne5+= Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 +=.

5.Nf3 Qe7 6.Be2 (6.b5!? Na5 7.Ne5+/–) 6...e4= 7.Nd4 Bd7 8.0-0 0-0-0 9.c4 Nd4 10.Bd4 dc4 11.Bc4 (worse is 11.Ba7 b6 12.Qc2 Be6+=) 11...Bc6 (11...Be6 12.Qc2 Bc4 13.Qc4 Ng4=) 12.Bc5 (12.b5!? Bd7 13.Nc3+/–) 12...Qe5= 13.Bd4 Qd6 (13...Rd4!? 14.ed4 Qd4=) 14.Bf7 Rd7 (14...Bb5 15.Re1+/– (worse is 15.Ba7 Bf1 16.Qf1 b6+=)) 15.Bb3 Be7 (15...h5 16.Nc3 (16.Ba7?! b6=) 16...Ng4 17.g3+/–) 16.Bc5 (better is 16.Nc3!?+-) 16...Qe5+= 17.Nc3 (17.Be7 Qe7 18.Qe2 Rhd8+=) 17...Bc5= 18.bc5 g5 (worse is 18...Qc5 19.Be6+-) 19.a4 b6? (19...Kb8!?=) 20.a5 g4? (better is 20...b5!?+/–) 21.ab6+- ab6 22.Ra7 (22.cb6 cb6 23.Ba4 Kb7+-) 22...bc5? (22...Kd8 23.cb6 cb6 24.Ra6+-) 23.Qa1 (better is 23.Ba4!? Bd5 24.Qa1+- (24.Bd7?! Kd7 25.Nd5 Qd5+-)) 23...g3?? (better is 23...Rdd8+-) 24.Ra8! 1–0. pieeater – allknight, ChessWorld.net, 2011.

5.Nf3 Be7 6.b5 (better 6.Ne5 Ne5 7.Be5+=) 6...Qd7?? (6...e4!? 7.bc6 ef3 8.Qf3 bc6=) 7.Ne5?? (better 7.bc6 Qc6 8.Be5+-) 7...Na5?? (better 7...Ne5 8.Be5 0-0+=) 8.Nd7+- Bd7 9.Bc3 a6 (9...Nc4 10.Bf6 Bf6 11.Nc3+-) 10.d3 (better 10.Ba5 b6 11.Bb4 ab5 12.Be7 Ke7+-) 10...ab5 11.Nd2 Nc6 12.Bf6 gf6 (12...Bf6 13.d4 Nd8 14.Bd3+-) 13.Qf3 (13.d4 Nd8+-) 13...h6 (13...b4 14.a4+-) 14.Qd5 Na7 (14...b4+-) 15.Qb5 (better 15.Qb7 Bc6 16.Qc7+-) 15...Nb5-+ (worse 15...Bb5 16.c4 Bd7 17.d4-/+) 16.Be2 b6 (16...Bb4 17.Bf3 Bc3 18.Rd1-+) 17.Bf3 Nd6?? (better 17...Ra4-+) 18.Ba8+- f5 (18...c6 19.Rb1 b5 20.c4+-) 19.0-0 (19.c4 c6 20.c5 bc5+-) 19...Bf6 20.Rab1 Kd8 21.Nc4 (better 21.c4 Re8+-) 21...c6 (21...Nc4 22.dc4 Ba4+-) 22.Nd6 Rh7 (22...Kc7 23.Bb7 Kd6 24.Rb6 f4+-) 23.Bc6! (23.Bc6 Bc6 24.Rb6+-) 1–0, time forfeit. FeegLood (2370) – renard73, 2015.

5.Nf3 Bf5 6.Bb5 Bb4?? (better is 6...e4 7.Ne5 Qd6=) 7.ab4+- 0-0 8.0-0 (better is 8.Bc6 bc6 9.Be5+-) 8...Nb4 9.Ba4 Nc2?? (better is 9...e4 10.Nd4 Bd7+-) 10.Bc2+- e4 11.Ne5 d4 (11...c5 12.f3+-) 12.Bd4 c5 (12...Qd6 13.Nc3 c5 14.Nc4+-) 13.Bb2 (13.Bc5!? Qc7 14.Bd4 Rfe8+-) 13...Qd6 14.Na3 Ng4 (14...Rfd8 15.Nec4 Qe6 16.f3+-) 15.Nac4 (15.Ng4!? Rfd8 16.Ne5 Qd2+-) 15...Qh6 (15...Qe6 16.f3 Ne5 17.Ne5 (17.Be5?! Qc4 18.fe4 Bg6+-) 17...ef3 18.Bf5 (18.Qf3?! Bc2 19.Rfc1 Qb3+-; worse is 18.gf3 b5+-) 18...Qf5 19.Nf3+-) 16.h3 (16.Ng4!? Qe6 17.Nge5 b5+-) 16...Nf6 (16...Ne5 17.Ne5 (worse is 17.Be5 Qe6+-) 17...Qb6 18.Qb1+-) 17.Nd6 Bh3 (17...Be6+-) 18.Nef7 (better is 18.gh3 Qh3 19.Ne4+-) 18...Rf7? (18...Qg6 19.g3 Rf7 20.Bb3+- (20.Nf7?! Qf7 21.Re1 Ng4+-)) 19.Nf7 (better is 19.gh3 Qg6 20.Kh2 Ng4 21.Qg4 Qd6 22.Kh1 Re7+-) 19...Kf7?? (19...Qg6 20.g3 Qf7+-) 20.Bf6 Qf6 21.gh3 Qg5 22.Kh2 Re8 23.Rg1 Qe5 24.Kh1 Kg8 25.Rg7! Kg7 26.Qg1 Kh8 27.Ra7 Rg8 28.Qb1 Qg5 29.Qb2 Rg7 30.Ra8 Qd8 31.Rd8 1–0. pieeater – interloper, ChessWorld.net, 2011.

5.Nf3 Bf5 6.d3 Bd6 7.Be2 (7.b5 Nb8 8.Be5 Be5 9.Ne5 Nbd7+=) 7...0-0 (7...Qe7 8.0-0+=) 8.0-0 (8.b5 e4 9.Nh4 Ne7+=) 8...d4 (8...Qe7 9.Nbd2+=) 9.e4 (9.b5!? Ne7 10.ed4 ed4 11.Bd4+/–) 9...Bg4 10.h3 Bh3?? (better is 10...Be6=) 11.Ng5?? (better is 11.gh3!? Qd7 12.Kg2+-) 11...Bg2?? (better is 11...Bd7-/+) 12.Kg2+= Qc8 13.Rh1 Qd8 14.Rh4 Be7? 15.Qh1+/– h6 16.Nd2?? h5?? 17.Bh5+- Nh5 18.Rh5 g6 19.Rh8 Kg7 20.Qh7 Kf6 21.Rf8 Qf8 22.Nf1 Kg5= 23.Bc1 Kg4?? 24.f3 1–0. pieeater – interloper, ChessWorld.net, 2011.

5.Nf3 Bf5 6.Ne5 Ne5 7.Be5 Qe7 8.Bb2 0-0-0 9.Bd4 Qe6 10.Be2 Be4 11.0-0 Bd6 12.c4 (12.Nc3 Be5+/–) 12...Rhe8 (12...dc4 13.Nc3 (13.Ba7? Qe5 14.Bg4 Nd7-+) 13...Bd3 14.Bd3 cd3 15.Qa4+/–) 13.f3 Bf5 14.Nc3 c6? (better is 14...Be5!? 15.Be5 Qe5+/–) 15.cd5 cd5 (better is 15...Nd5 16.Nd5 Qd5 17.Ba7 Bc7+-) 16.Ba7 Be5 (16...Re7 17.Nb5 Bc7 18.Bc5+- (worse is 18.Nc7 Rc7 19.Rc1 Ne8+-)) 17.Rc1 Bc7 18.Qa4 Qe5 (18...Rd6+-) 19.f4 (19.f4 Qe7 20.Bc5+-) 1–0. ekosachro (2160) – angelbearoh, net–chess.com, 2014. (=1.a3 e5 2.e3 Nc6 3.b4 d5 4.Bb2 Nf6)

5.Nf3 Bg4 6.Be2 Bd6 7.0-0 Bf3 8.Bf3 0-0 9.Nc3 e4 10.Be2 a6 11.d4 b5 12.Qd2 Re8 13.Rad1 Qd7 14.g3 g6 15.Kg2 Reb8 (15...Ne7!?+=) 16.f3= Re8 (16...ef3!? 17.Bf3 Qe6+/–) 17.fe4+/– Ne4 18.Ne4 Re4 19.Bf3 Ree8 20.Bd5 Re7?? (20...Bb4 21.Bf7 (worse is 21.ab4 Qd5 22.Kg1 a5-/+) 21...Qf7 22.Rf7 Bd2 23.Rc7=) 21.Bc6 (21.Qc3 Bb4 22.Qc6+- (worse is 22.ab4 Qd5 23.Kg1 a5+=)) 21...Qc6+/– 22.d5 Qd7 23.Qd4?? (better is 23.Bf6 Re4 24.Rf3+/–) 23...Be5-/+ 24.Qc5? (better is 24.Qe5 Re5 25.Be5-/+) 24...Bb2-+ 25.Rd3 Rc8 26.Qa7 Qd6 27.c3 c6 28.Qa6 Qe5 29.Re1 cd5 30.Qb5?? Rd8 31.c4?? Bc3 32.a4?? Be1 33.cd5 Rb8 34.Qc6 Qe4 (34...Qe4 35.Kg1 Qd3-+) 0–1. Neumann,Frank – Bokros,Csaba, RN–2012–0-00484, 2012.

5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 e4 8.Be2 Be7 9.0-0 0-0 10.d3 Re8 11.de4 (11.b5 Nb8+=) 11...de4 (11...Ne4 12.b5 Na5 13.Nd2=) 12.Qd8 (12.b5 Nb8=) 12...Rad8= 13.c4 h6 14.Nc3 (14.Bc3 Bd6=) 14...Rd2 15.Rab1 Red8 (15...a5 16.ba5 Na5 17.Rfd1+=) 16.Rfd1 Rd1 (16...Rc2 17.Kf1 Ne5 18.Rd8 Bd8 19.Ba1+=) 17.Rd1+= Rd1 18.Bd1 Ne5 19.c5 (19.Ne4 Nc4 20.Nf6 gf6+/–) 19...Nd3 20.Ba1 c6? (20...a5 21.c6 bc6 (21...ab4? 22.cb7 Nd7 23.ab4+-) 22.ba5 Ba3+=) 21.Bc2+- b6 22.cb6 ab6 23.Kf1 (23.Ne4 Ne4 24.Bd3 Nf6+-) 23...c5? (23...Ng4 24.Ne4 Ndf2 25.Ke2 Ne4 26.Be4=) 24.bc5 (24.Ne4 Ne4 25.Bd3 Nd6+-) 24...bc5 (24...Nc5 25.Nb5=) 25.a4 (better is 25.Ne4 Ne4 26.Bd3+-) 25...c4= 26.a5 Nd7? 27.Nd5 Bc5+/– 28.Ba4 N7e5 29.Bd4 Bd4 30.ed4+- Nc6 31.Bc6 f5 32.a6 Nb2 33.a7 c3 34.Nc3 1–0. thedesertfox (1750) – dbeckett (1685), net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

5.Nf3 h6 6.Be2 (6.Ne5!? Ne5 7.Be5+/–) 6...Bd6 7.0-0 0-0 (7...Qe7 8.d4=) 8.d3 (8.b5!? e4 9.bc6 ef3 10.cb7 Bb7 11.Bf3+=) 8...a6 9.Re1 b5 10.Nc3 Bg4 11.h3 Bh5 12.Qd2 e4 13.de4 de4 14.Nh4?? (14.Nd4 Be2 15.Qe2 Ne5+=) 14...Be2 (better is 14...Bh2! 15.Kh2 Qd2-+) 15.Re2 Ne5 16.Nf5 Nc4 17.Qc1 Qc8 18.Nd4 (better is 18.Nd6 cd6 19.Nb1+=) 18...Nh5?? (18...c5 19.bc5 Qc5 20.Re1-/+) 19.Nc6?? (better is 19.Ne4 Be5 20.a4+/–) 19...Qf5 20.Ra2 Rae8 21.Qd1 Re6 22.Nd5 Kh7 23.c3? Rg6-+ 24.Nde7?? Be7 25.Ne7-/+ Rg2 26.Kg2 Qf3 27.Kg1 Qh3 28.Qd5 Qf3?? 29.Nf5?? Qe2-+ 30.Qe4 g6 31.Nh4?? Nf6 32.Qd4 Ng4 33.Qf4 Nce5 34.c4 Nc4 35.Qd4 Qf2 36.Kh1 Qh2 0–1. pieeater – calchess10, ChessWorld.net, 2011.

5.h3 Be7 6.Nf3 (6.b5 Na5 7.Be5 Nc4 8.Bc4 dc4+=) 6...Bd6 (6...e4 7.Nd4+=) 7.c4 (7.b5 e4 8.bc6 ef3 9.Qf3 bc6 10.Bf6 Qf6 11.Qf6 gf6+=) 7...Be6 (7...e4 8.Nd4 Nd4 9.Bd4 dc4 10.Bc4+=) 8.cd5 (better is 8.c5!? Be7 9.Ne5 Ne5 10.Be5+=) 8...Bd5+= 9.Be2 (9.Nc3 Be6=) 9...0-0 10.0-0 Ne4 (10...Bf3 11.Bf3 e4 12.Be2=) 11.Nc3 (11.b5 Na5 12.d4 Nb3 13.de5 Be7= (13...Na1? 14.ed6 Qd6 15.Qd4+-)) 11...Nc3+= 12.Bc3 f5 (12...e4 13.Ne1+=) 13.Rc1 (better is 13.b5!? e4 14.bc6 ef3 15.Bf3 bc6 16.d3+=) 13...e4+= 14.Nd4 Qg5 (14...Nd4 15.Bd4 a5 16.d3+=) 15.Nc6= bc6 (15...Bc6 16.Qb3 Kh8 17.b5=) 16.f4 ef3 17.Bf3 Qg3 18.Bd5 cd5 19.Rf3 (better is 19.Qf3!? Qf3 20.Rf3+=) 19...Qh2-/+ 20.Kf1 Bg3 21.Qc2?? (better is 21.Bd4-/+) 21...Qh1-+ 22.Ke2 Qg2 (22...Qg2 23.Kd3 Qf3-+) 0–1. thedesertfox (2100) – tahafathi (2185), net–chess.com, 2004. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

6.d4 ed4 7.Bd4= Bf5 (7...Nc4 8.Nc3 Be6 9.Bc4 dc4 10.Qf3+=) 8.Bd3 Bg4 9.f3 Bd7 (9...Be6 10.Bc3 c6 11.Qd2+=) 10.Ne2 c5 (10...Nc4 11.Nec3=) 11.bc6+= Nc6 12.Bb2 (12.0-0 Nd4 13.Nd4 Bd6=) 12...Qe7 13.Qd2 0-0-0 (13...Rc8 14.Nd4=) 14.0-0 (14.Nd4 Re8 15.Kf2 Nd4 16.Bd4 b6+=) 14...Re8 15.Kf2 Kb8 16.Nf4 (16.Nd4 Ne5=) 16...Qd6 17.Bb5 Attacks the isolani on d5 (17.Kg1 d4 18.Re1 g5-/+) 17...h6 (17...Ne5 18.Be5 Qe5 19.Bd7 Nd7 20.Nc3=) 18.c4 dc4 (18...a6 19.Bc6 bc6 20.Rd1+=) 19.Rd1 (19.Bf6 gf6 20.Bc4 Be6+=) 19...Qd2= 20.Nd2 White fights for the Initiative (worse is 20.Rd2 Bc5 21.Re2 Ne5 22.Be5 Re5 23.Bc4 Rhe8-+) 20...c3 (20...Na5 21.Bc4 Bc5 22.Bd4 Bd4 23.ed4 Nc4 24.Nc4+=) 21.Bc3+= Bc5 22.Nc4 Rd8 (22...Be6 23.Ne6 Re6 24.Bf6 Rf6 25.Rd5+/–) 23.Rab1 Ka8 24.Nd3 (24.Bf6 gf6 25.Rd5 Be7+/–) 24...Be7 25.e4 Nd4? (25...Be6 26.Kg1+/–) 26.Bd7+= (26.Bd4?! Bb5 27.Nb6 ab6 28.Bf6 Bd3 29.Be7 Bb1 30.Bd8 Bc2+-) 26...Rd7 27.Nde5 Nb5 28.Rd7 Bc5 29.Ne3 Nc3 30.Rbb7 Nd7 31.Rd7 f6 32.N5c4 g5 33.Kg3 Ne2 34.Kg4 h5 35.Kf5 Rh6 36.e5 Nd4 37.Ke4 fe5 38.Ke5 Nc6 39.Kf5 Be7 40.Ke4 Ba3+/– 41.Nf5 Bf8 42.Nh6 Bh6 43.Rd6 Kb7 44.Rh6 Nd8 45.Nd6 Kc6 (45...Kc7 46.Nb5 Kb7 47.Rh5+-) 1–0. SuperForte 5 Mhz – GrandMasterChess 80286, 1994.

6.d4 e4 7.Qd2 Nc4 8.Bc4 dc4 9.Ne2 +=.

6.Be5 Nc4 7.Bf6 gf6 8.Bc4+/- dc4 9.Qe2 (9.Qf3 Rg8+/-) 9...Be6 (9...Qd5 10.Qf3 Qb5 11.Nc3+=) 10.Nc3+/- Qd5?? (10...Qe7 11.Nf3+/-) 11.Nf3 (11.Nd5 Bd5 12.e4 Kd7+-) 11...a6?? (better 11...Qd7+/-) 12.Nd5+- ab5 (12...Bd5 13.e4 Be6+-) 13.Nc7 (13.Nc7 Kd7 14.Na8+-) 1-0. black_bishop_88 (2555) - weedeater (1855), Hourly Bullet Arena, lichess.org, 2020. (=1.a3 e5 2.b4 d5 3.Bb2 Nf6 4.e3 Nc6)

6.Be5 Bd6 7.Bb2 0-0 8.Nf3 Bg4 9.h3 Bf3 (9...Bh5!?+=) 10.Qf3+- Nc4 (better 10...Ne4!?+-) 11.Bc4+- dc4 12.0-0 (12.Qb7 a6 13.Bd4 Re8+-) 12...Be7 (12...a6!? 13.a4 Ra7+-) 13.Qb7 Rb8 14.Qc6 Rb6 (14...Qd5 15.Qd5 Nd5 16.a4+-) 15.Qc4 Qd7 16.a4 a6 17.Ba3 (17.Na3 ab5 18.Nb5 c6+-) 17...Ba3 (17...ab5 18.ab5 Ra8 19.Ra2+-) 18.Na3 Qd2 (18...Rd8 19.d4+-) 19.Rad1 Qa5 (19...ab5 20.ab5 Qa5 21.Qc7 Ne8+-) 20.ba6 (better 20.Qc7 ab5 21.ab5+-) 20...Ra6 (20...Rb4 21.Qc6 Qa4 22.Qa4 Ra4 23.Rd3+-) 21.Nb5 (21.Rd4 c5 22.Rd3 Raa8+-) 21...c6 (21...Qa4!? 22.Rd4 Qc4 23.Rc4 Rc8+-) 22.Nc3+- Nd7?? (better 22...Rb6+-) 23.Rd7 Ra7 (23...Raa8 24.Rfd1+-) 24.Ra7 Qa7 25.Qc6 Qe7 26.Nd5 Qa7 27.c4 h5 28.c5 Rb8 29.Nb6 Qe7 30.Rd1 Rb7 (30...Rf8 31.Qd6 Qa7 32.Qe5+-) 31.Rd7 (31.Nd5 Qf8 32.Qb7 Qe8+-) 31...Rd7 32.Nd7 Qd8 (32...Qh4 33.Qc8 Kh7 34.Nf8 Kh6 35.Qf5+-) 33.Qd5 (better 33.Qd6 Qa5 34.c6 Qa4+-) 33...Qc7 (33...Qa5 34.Ne5 Qe1 35.Kh2 Qf2 36.Nf7 Qf7 37.e4+-) 34.Nb6 (better 34.Ne5 g6 35.Ng6 Kg7+-) 34...Qe7 (34...g6 35.a5 Qa7 36.Qa8 Qa8 37.Na8+-) 35.Qh5 (better 35.c6 Qa3+-) 35...Qe4 (35...Qf6 36.Qd5 Qb2 37.Qd4+-) 36.Qd5 Qb1 37.Kh2 Qf1 38.Qd8 (better 38.c6!? Qc1+-) 38...Kh7 39.Qh4 Kg8 40.Qf4 (40.c6 Qd3 41.c7 Qd6 42.Qg3 Qc7 43.Qc7 g5 44.a5 g4 45.a6 g3 46.Qg3 Kh7 47.a7 Kh6 48.a8Q Kh7 49.Qe4 Kh6 50.Qeh4) 40...Qc1 41.Qd4 Qf1 42.Kg3 (42.c6 Qf2 43.c7 Qf5 44.c8Q Qc8 45.Nc8 f6 46.Qd8 Kf7 47.Qd7 Kg6 48.Ne7 Kf7 49.Nf5 Kg6 50.g4 Kg5 51.Qg7) 42...Qd1 (42...Qb1+-) 43.Qd1 (43.Qd1 g6 44.Qd8 Kg7 45.Nd7 Kh7 46.Qf8 g5 47.Qf7 Kh6 48.Nf8 g4 49.Qg6) 1–0. GuestFHRH – GuestDWMT, freechess.org, 2017.

6.Be5 Ne4 7.Nf3 Bd6 (7...f6 8.Bc3 c6 9.Nd4+/–) 8.Bd6 (better is 8.Bg7!? Rg8 9.Bb2+-) 8...Qd6+/– 9.d3 Bg4?? (better is 9...Qf6 10.Ra2 Be6+/–) 10.de4+- 0-0-0 (10...de4 11.Qd6 cd6 12.Nd4+-) 11.ed5 Rhe8 (11...Bf3 12.Qf3 Qd5 13.Qd5 Rd5 14.Bd3+-) 12.Be2 (better is 12.Nc3 Kb8+-) 12...Re5 (12...Qd5 13.Qd5 Rd5+-) 13.Ne5 Be2 14.Ke2 (better is 14.Qd4 Qd5 15.b6 ab6 16.Ke2 Qg2 17.Qg4 Qg4 18.Ng4 Nc6+-) 14...Qe5 15.Nd2 (15.Qd4!? Qd4 16.ed4 Rd5+-) 15...Rd5 16.Qc1 Qh5 17.f3 Qg5 18.Kf2 Qh4 19.g3 Qh3 (19...Qd8 20.Rd1 Rb5 21.Rb1+-) 20.Ne4 (better is 20.c4 Rd3 21.Qc2 Qd7+-) 20...Nc4 21.Qf1 Nd2 (21...Qf1 22.Rhf1 Rb5+-) 22.Qh3 (22.Qh3 f5 23.Rad1 Rb5 24.Rd2+-) 1–0. Fournier,Frederic – pasdibe, Active, 2007.

6.Be5 Qe7 7.Bb2 Qd6 8.Nf3 Be7 9.d4 0-0 10.Nbd2 Bg4 11.Be2 Ne4 12.h3 Nd2 13.Qd2 (worse is 13.Kd2 Bf3 14.gf3 Nc4 15.Bc4 dc4=) 13...Bf3 14.Bf3 Nc4 15.Qc3 Nb2 (15...Qd7 16.a4+=) 16.Qb2+/– a6 17.ba6 Ra6 (17...Qa6 18.a4+=) 18.0-0 c6 (18...Rb8!?+/–) 19.Qb7+- Ra3? (better is 19...Raa8 20.Bg4 Rfb8+-) 20.Ra3 Qa3 21.Qc6 Rd8 22.Bd5 Qa7 23.c4 Qb8 24.Qb7 Qd6 25.Bf3 (25.Ra1 g6+-) 25...Bf6 (25...Rb8 26.c5 Qd8 27.Qd5+-) 26.c5 Qe6 27.Qc6 (27.c6 Re8 28.Bg4 Qe4+-) 27...Qe7 (27...Qa2 28.Rd1+-) 28.Qb5 g6 29.c6 Qc7 (29...Rc8 30.Ra1 Qf8 31.Ra7+-) 30.Qb7 Rc8 31.Qc7 (31.Ra1!? Bd8+-) 31...Rc7 32.d5 Be7 33.Rd1 Bd6 34.Rb1 Kg7 35.Rb7 Kf6 36.g3 Rb7 37.cb7 Ke7 38.e4 Kd8 39.Kf1 Kc7 40.Ke2 Kb7 41.Kd3 Kc7 42.Kd4 f6 43.Bg4 h6 44.f4 White prepares e5 44...g5 45.e5 fe5 46.fe5 Bf8 47.d6 Kd8 48.Kd5 Ke8 49.Bh5 Kd8 50.e6 Kc8 51.e7 Be7 52.de7 Kd7 53.e8Q 1–0. Fournier,Frederic (1905) – aresess (1720), Active, 2011.

6.Be5 Qe7 7.Nf3 c6 8.Nc3 Nc4 (8...Ne4!?+/–) 9.Bc4+- dc4 10.bc6 bc6 11.Qe2 Bg4 12.Qc4 Bf3 13.gf3 Rc8 14.Qa6 Qe6 (14...Kd8 15.Bd4+-) 15.Bf6 gf6 16.Qa7 Bg7 17.Rg1 0-0 18.Rb1 Kh8 19.Rb7 Ra8 20.Qc5 f5 21.a4 Be5 (21...Rfb8 22.Rb8 Rb8+-) 22.Re7 Bd6 (22...Ra5 23.Nb5 Qd5 24.Qd5 cd5 25.Re5 Ra4 26.Ke2+-) 23.Qd4 Be5 24.Qe5 Qe5 25.Re5 f6 (25...Rfb8 26.Ke2+-) 26.Rf5 Rab8 (26...Rf7 27.Ke2+-) 27.d4 Rb2 (27...Ra8 28.a5+-) 28.Kd2 Rf7 29.Ne4 Ra2 (29...Rg7 30.Rg3 Rg3 31.fg3 Kg7+-) 30.Rf6 Rf6 (30...Ra3 31.Rf7 Rd3 32.Kd3 h5 33.Rf5 h4 34.Rh5) 31.Nf6 1–0. Fournier,Frederic (2125) – slash25(C) (1725), Active, 2006.

6.Be5 Be7 7.Bc3 c6 (7...Nc4 8.Nf3+=) 8.a4 Bd7 9.Nf3 0-0 10.Ne5 c5 11.d3 Rc8 Black prepares c4 (11...Be6 12.Qd2 Qc7 13.Nf3+- (13.Ba5?! Qe5 14.d4 Qg5=)) 12.Qd2 b6 13.Nd7 Nd7 14.Ba5 ba5 15.Be2 c4 (15...Re8 16.0-0+-) 16.dc4 dc4 17.c3 (17.Bg4 Rc7+-) 17...Bf6 (17...Qc7 18.0-0+-) 18.Ra2 (18.0-0 Qe7+-) 18...Nb6 19.Qd8 Rfd8 20.0-0 Rd6 21.g3 (21.Rd1 Rd1 22.Bd1 Rd8+-) 21...Rcd8 22.Rc1 g6 23.Na3 Na4 24.Nb1 (24.Nc4 Nc3 25.Nd6 Na2+=) 24...Nc5+= 25.Kg2 (25.Ra5 Nb3 26.Ra7 Nc1 27.Bc4 R6d7 28.Rd7 Rd7-+) 25...Nd3 (25...a4 26.Bc4 h6 27.Kf3+-) 26.Bd3+- Rd3 (26...cd3 27.Ra5 R6d7 28.c4+-) 27.Rcc2 (27.Ra5 R8d7+-) 27...R8d7 28.Ra4 (28.Ra5 Rb7+-) 28...Rc7 (28...Kg7 29.Ra5 Rb7 30.Na3+=) 29.Ra5+- Rd1 (29...Rb7 30.Na3+-) 30.Rb2 (30.Na3 h6+-) 30...Rc1+= 31.Rb4 (better 31.Ra3!?+=) 31...Bc3= 32.Nc3 Rc3 33.b6 (33.Ra6!?=) 33...ab6-/+ 34.Rb6 Rc1 35.Rab5 c3 36.Rb1 Rc2 37.Rd1 Rd2 (37...Rb2!? 38.Rb2 cb2-/+) 38.Rd2= cd2 39.Rd6 Rc2 40.Kf3 (40.e4 f5 41.ef5 gf5+-) 40...Kf8 (40...f5+=) 41.Kg2 (better 41.e4!?+=) 41...Ke7=+ Threatening mate: Kxd6 42.Rd3 Ke6 43.Rd4 (43.Kf1 f5=) 43...f5 (43...g5 44.Kf1=+) 44.h3 g5 45.Kf3 h5 46.Kg2 Ke5 47.h4 g4 48.Kf1 Rb2 49.Kg2 ½–½. petrobbo (2045) – trikazhipuram (2100), ChessWorld.net, 2019.

6.Be5 Be7 7.Nf3 (7.Qf3 Be6+/–) 7...Bd7 (7...0-0 8.d4+=) 8.Bc3 (8.Nc3 0-0+/–) 8...Nc4+= 9.Bc4 dc4 10.Nd4 0-0 (10...a6 11.a4+=) 11.Qe2+/– c6 (11...a6 12.Qc4 ab5 13.Nb5+/–) 12.bc6 Bc6 (12...bc6 13.Qc4 c5 14.Nf3+/–) 13.Nc6+- bc6 14.Qc4 Rc8 (14...Qd6 15.0-0+-) 15.0-0 Nd5 16.Bb2 Nb6 (16...Rb8 17.Bd4 Bf6 18.Nc3+-) 17.Qg4 g6 (17...Bf6 18.Bf6 Qf6 19.Nc3+-) 18.d3 h5 (18...f5 19.Qf3+-) 19.Qf3 Re8 (19...Qd5 20.e4 Qc5 21.Bc3+-) 20.Nd2 c5 (20...h4 21.Ne4 f5 22.Nc3+-) 21.Ne4 (21.Rfd1 Qc7+-) 21...c4 (21...f5 22.Nc3+-) 22.Qf4 (better is 22.Rfd1+-) 22...cd3?? (better is 22...Nd5 23.Qg3 h4+-) 23.Qh6 f6 (23...Bf6 24.Bf6 Qf6 25.Nf6) 24.Qg6 Kh8 (24...Kf8 25.Ng5! fg5 26.Qg7) 25.Ng5 1–0. Wall,Bill – Lantic, internet, 2004.

6.Be5 Bg4 7.Be2 Nc4 8.Bd4 Be2 9.Ne2 +/– (worse is 9.Ke2 Be7=).

6.Be5!? Bg4 7.Nf3 +=.

6.Be5 b6 7.Bf6+/– gf6 8.Nc3 (8.Nf3 a6+-) 8...Bg7 9.Nf3 f5 10.d4 Bb7 (10...a6 11.ba6 0-0 12.Bd3+/–) 11.Bd3+- 0-0 (11...a6 12.a4+-) 12.0-0 (12.Ne2 a6+-) 12...f4 (12...a6 13.a4+-) 13.Ng5 (better is 13.ef4 a6 14.ba6 Ba6 15.Re1 Bd3 16.Qd3+-) 13...fe3?? (13...h6 14.Qh5 fe3 15.fe3 Qe8 16.Nf7 Rf7 17.Rf7 Qf7 18.Bh7 Kf8+-) 14.Bh7 Kh8 15.Qh5 1–0. Wall,Bill – Pitts, internet, 2000.

6.Be5 c6 7.Bf6 gf6 8.Nf3 Bg7 9.d4 Bg4 10.bc6 bc6 11.Nbd2 0-0 (11...Qa5 12.Be2+/–) 12.Bd3 Re8 13.0-0 Bf5 14.Bf5 Nf5 15.c4 Rb8 16.Qa4 Qc7 17.Rfc1 dc4 18.Qc4 Ne7 19.Rab1 Rb1 20.Rb1 Rb8 21.Rb8 Qb8 22.Qc5 Bf8 23.h3 Ng6 24.Qc6 Bd6 25.a4 f5 26.Qd7 f4 27.e4 Ne7 (27...Qc7 28.Qc7 Bc7 29.Nb3+-) 28.e5 Bb4 29.Ne4 Qa8 (29...Kg7 30.Nf6+-) 30.d5! Nd5 (30...Qd5 31.Nf6) 31.Qd5!! (31.Qd5 Qd5 32.Nf6 Kf8 33.Nd5+-) 1–0. Trkn – guest5328, ICC, 2004.

6.Be5 Qd7 7.Nf3 Qe6? (7...Ne4 8.d3 Nd6 9.c4+/–) 8.Nc3 (8.Bc7!? Nf5+-) 8...c6 9.bc6 bc6 10.Be2 Ng6 11.Bg3 Bd6 (11...Bc5 12.0-0+/–) 12.Bd6 (better is 12.Nd4!? Qd7 13.Nc6 Bg3 14.hg3+-) 12...Qd6+/– 13.0-0 0-0 14.d4 Ne4 15.Ne4 de4 16.Nd2 Re8 17.c4 c5 18.d5 Rb8 19.Rb1 Ba6 20.Rb8 Qb8 21.Qb3 Qd6 22.Rb1 f5 23.g3 Ne5+/– 24.a4 Nf3? 25.Nf3+- ef3 26.Bf3 f4 27.ef4 Qg6 1–0. Fournier,Frederic (1740) – ORCAS8, Active, 2011.

6.Be5 Nd7 7.Bb2 Nf5 8.Nf3 Nf6 9.c4 Be7 10.Be2 0-0 11.0-0 c6 12.bc6 bc6 13.cd5 cd5 14.Nc3 Bb7 15.d4 Ne4 16.Ne4 (16.Qa4 Qd6+/–) 16...de4 17.Ne5 f6? (17...Bd5 18.Qa4+/–) 18.Nc4 (better is 18.Qb3!? Bd5 19.Bc4+-) 18...Bd5 19.Rc1 Rc8 20.Qa4 Bc6 (better is 20...Rc7!?+/–) 21.Qa7+- Rc7 22.Qb6 Qc8?? (22...Bd5 23.Qa5 Rb7 24.Rc2+-) 23.Qa5 (better is 23.Na5!? Qb8 24.Rc6 Rc6 25.Qc6 Qb2 26.Qe6 Kh8+-) 23...Bd8?! (23...Rd8 24.Nb6 Qb8 25.Rc2+-) 24.Qd2 (better is 24.Bg4!? g6 25.Nd6 Qb8 26.Nf5 gf5 27.Bf5 Qb7+-) 24...Bb5 25.Nb6 (better is 25.Qb4 Qa6+-) 25...Qb7? (better is 25...Qa6 26.Bb5 Qb5+-) 26.Bb5 Rc1 27.Rc1 Bb6 (27...Qb6 28.Bc4 Kh8 29.Bd5+-) 28.a4 (28.Bc6 Qa7 29.Be4 Nd6 30.Bd5 Kh8+-) 28...Rc8 (28...Qe7 29.Rc6 Bd8 30.Qc1+-) 29.Rc8 (29.Qb4 Rc1 30.Bc1 Qb8+-) 29...Qc8 30.Qc3 Qc3 31.Bc3 Nd6 32.Bb4 (32.Bb4 Nb5 33.ab5+-) 1–0. Fournier,Frederic (1990) – jrecatepec, Active (3/0), 2005.

6.Be5+= Bf5 7.Nf3 (7.Bf6 gf6 8.Nf3 Rg8+/–) 7...Ng6+= 8.Bb2 (8.Bd3 Bd3 9.cd3 Ne5 10.Ne5 Bd6+=) 8...Bd6 9.c4 0-0 10.Nc3 White launches an attack 10...c6 (10...dc4 11.Bc4 Ne5 12.Ne5 Be5 13.d4+/–) 11.bc6+= bc6 12.Nd4 Qd7 (12...Ne7 13.Nf5 Nf5 14.Bd3+/–) 13.cd5+/– cd5 (13...Nd5 14.Nd5 (worse is 14.Nf5 Qf5 15.Nd5 cd5+/–) 14...cd5 15.Bb5+- (15.Nf5?! Qf5 16.Rb1 Rfb8+/–)) 14.Bb5 Qc8 15.Rc1 Be6? (15...Bc7!?+-) 16.Nd5! Qd8 (16...Bd5 A deflection 17.Rc8) 17.Nc6 (17.Ne6?! fe6 18.Nf6 gf6+-) 17...Qe8 (17...Qc8 18.Nce7! Ne7 19.Rc8 Rfc8 20.Nf6 gf6 21.Qf3+-) 18.Nf6 (better is 18.Nce7! Be7 19.Be8 Bd5+-) 18...gf6 19.Qh5 (19.Bf6 Ba3 20.Qh5 Bc1=) 19...Be5 (19...a6 20.Ba4+-) 20.Be5 (20.d4 a6 21.Ba4 Bd6+-) 20...fe5 21.Bd3 (21.d4 ed4 22.Nd4 Rc8+-) 21...Bd7 (21...Rc8 22.Bb5 Bd5+=) 22.Bg6 (better is 22.Ne5 Rb8 23.Nd7 Qd7 24.Bf5+-) 22...fg6 23.Qe5 (better is 23.Qh4!?+-) 23...Bc6+= 24.Qe8 Be8 25.0-0 (25.d4 Rb8+=) 25...Bf7 (25...Bb5 26.Rfe1=) 26.Rc7 Rfd8 (26...Rfc8 27.Rfc1 Rc7 28.Rc7+=) 27.d4+/– Rac8 (27...Be6 28.Rb1 Rab8 29.Rd1+=) 28.Rfc1 (28.Ra7!? Ra8 29.Ra8 Ra8 30.Ra1+/–) 28...Rc7+/– 29.Rc7 Rb8 30.h3 a6 31.Rc6 Ra8 32.Kh2 Bd5+= 33.Rc3 Rb8 34.f3 Rb2 35.e4+/– Bb7 36.d5 Rb6 37.Kg3 Rd6 38.Kf4 Rd7 39.Ke5 Kf7 40.f4 Ke7 41.g4 White prepares f5 41...h6 42.f5 Kf7 43.fg6 Kg6 44.Ke6 Rd8 45.Ke7 Rc8 46.Rc8 Bc8 47.e5 Kg7 48.d6 Kg6 49.e6 (49.e6 Be6 50.Ke6+-) 1–0. Wilk,E – Sobocinska, Augustow Poland, 1994.

6.Be5 Ng6 7.Bb2 Bd6 8.Nf3 0-0 9.c4 Re8 10.cd5 Nd5 11.Nc3 Ndf4 12.g3 Bg4?? (better 12...Nh5+=) 13.gf4+- Nf4 14.Rg1 Bh5 15.Be2 (better 15.d3!? Be5 16.d4 Bd6+-) 15...Ne2 16.Ne2 (worse 16.Ke2 Qf6 17.Ke1 Bf3-/+) 16...Qf6?? (better 16...Bf3 17.Rg7 Kf8+-) 17.Bf6 (17.Bf6 Bg6 18.Bd4+-) 1–0. FeegLood (2660) – Ogrilla (2695), lichess.org, 2018.

6.Be5 Ng6 7.Bb2 Bd6 8.Nf3 0-0 9.d4 c6 10.bc6 bc6 11.c4 dc4 (11...Bf5 12.c5 Rb8 13.Ra2+=) 12.Bc4+= Nd5 13.Nbd2 Bg4 14.Be2 Qe7 15.0-0 Rab8 16.Rb1 (16.Nc4 Ngf4 17.ef4 Rb2+/–) 16...Rfe8 (16...Bf5 17.e4 Ngf4 A) worse is 18.ef5 Ne2 (worse is 18...Qe2 19.Qe2 Ne2 20.Kh1+=) 19.Kh1 Nec3-/+; B) 18.Bc4 Be4 19.Re1=) 17.Qc1 (17.Nc4 Bc7+/–) 17...Rec8 (17...Bf5 18.Ra1= (worse is 18.Qc6 Ne3 19.fe3 Bb1+=)) 18.h3 (18.Qc2 c5 19.Nc4 cd4 20.Bd4 Rb1 21.Rb1 Ba3+=) 18...Be6 (better is 18...Bf5!? 19.e4 Be4 20.Ne4 Qe4=) 19.Nc4 Bc7 20.Nce5 (20.Qc2!?+/–) 20...Ne5+= 21.Ne5 Be5 22.de5 Qg5 23.Bd4 Bh3 24.Bf3 Be6? (better is 24...Nb6!?+=) 25.Rb8+/– Rb8 26.e4 Nf4+= 27.g3 Rf8?? 28.Qf4+- Qh5 29.Qh4 (29.Qh4 Qf3 30.Rc1+=) 1–0. Fournier,Frederic – Guest402596, Partie amicale, 1m + 0s, 2007.

6.Be5 Ng6 7.Bb2 Be7 8.Nf3 0-0 9.c4 Bg4 10.h3 Be6 11.Qc2 c6 12.Be2 cb5 13.cb5 Ne4 14.Nc3 Rc8 15.Qa4 Qb6 (15...Nc5!? 16.Qd1 Re8+=) 16.Ne4+- de4 17.Qe4 f5 18.Qd4 Qd4 19.Bd4 (19.ed4?! Nf4+=) 19...Nh4 20.Nh4 Bh4 21.Ba7 Rc2 22.Bd3 Rcc8 23.Bd4 Be7 24.0-0 f4 25.a4 f3 26.Be4 fg2 27.Bg2 Rc7 28.Rfc1 Rd7 29.b6 Bf6 30.Bf6 Rf6 31.d4 Rg6 32.Kf1 h6 33.Rc7 Rf6 34.a5 Rff7 35.Rac1 Kh7 (35...Rf5 36.a6 ba6 37.b7+-) 36.Ke1 Kg6 (36...Rc7 37.Rc7 Rc7 38.bc7+-) 37.R1c5 (37.Bb7 Kf6 38.R1c6 Kg5+-) 37...Rde7 (37...Rc7 38.bc7 Bc8 39.Bd5+-) 38.Re7 (better is 38.Bb7 Kf6+-) 38...Re7 39.Rc7 (39.Rc7 Rc7 40.bc7+-) 1–0. combijack (1790) – floyd_page, gameknot.com, 2012.

6.Be5 Ng6 7.Bd4 +=.

6.Be5+= Ng6 7.Nf3 +=.

6.Nf3 0-0 7.Bc6 bc6 8.Ne5 Ne4 9.Nc6 Qg5 10.Rg1 (better is 10.g3+/–) 10...Bh2+= 11.Rf1 Qg2 12.d3? (better is 12.Qe2 Bh3 13.d3 Nf2 14.Rf2-/+) 12...Bg4 13.Qc1 Nf6 (better is 13...Ng3 14.Nd2 Bg1 (14...Nf1?! 15.Nf1 Bd6 16.Qd2-+) 15.Ne7 Kh8-+) 14.Bd4 Qf3 15.Qd2 Bh3 0–1. cindya (2235) – ditto (1905), net–chess.com, 2011.

6.Nf3 Bd7 7.Bc6 Bc6 8.Ne5 Be5 9.Be5 0-0 10.Bd4 Ne4 11.0-0 Qh4 12.d3 Nf6 13.Nc3 Ng4 14.h3 Nf6 15.Qf3 Nh5? (better is 15...a6+-) 16.b5 Bd7 17.Qd5 Bh3 (17...Bc8+-) 18.gh3 Qh3 19.Qb7 Rfc8 20.Qg2 (20.Ba7?! Ra7 21.Qh1 Qg4 22.Qg2 Qh4+-) 20...Qg2 21.Kg2 c6 22.bc6 Rc6 23.Rfb1 Rc7 24.Rb2 f5 25.Rab1 g6 26.Nd5 Rd7 27.c4 Kf7 28.Rb7 Rb7 29.Rb7 Ke8 (29...Kg8+-) 30.Nc7 (30.Nc7 Kd8 31.Na8+-) 1–0. Klaus Behrmann (2390) – Geordiedazza, ChessWorld.net, 2003.

6.Nf3 Nd7 7.d3 (7.0-0 a5 8.ba5 Ra5 9.c4=; 7.Nc3 Ne7 8.Be2 e4 9.Nd4=) 7...a5 8.ba5 Ra5 9.c4 =.

6.Nf3 Qe7 7.d4 (7.c4 dc4 8.Bc6 bc6 9.Qc2=; 7.Bc6 bc6 8.d4 ed4 9.Nd4=) 7...e4 8.Ne5 Bd7 9.Bc6 =.

6.Nf3 Bg4 7.c4 dc4 8.Bc6 bc6 9.h3 =.

6.Nf3 Bg4 7.Bc6 bc6 8.h3 Bf3 9.Qf3 =.

6.Nf3 Bg4 7.h3 Bf3 8.Qf3 0-0 9.0-0 (9.c4 e4 10.Qf5 Be7=) 9...e4 (9...a5 10.Bc6 bc6 11.ba5 Ra5 12.Qf5=) 10.Qe2 (10.Bf6 ef3 11.Bd8 fg2 12.Kg2 Nd8=) 10...a6 (10...Ne5 11.f4 ef3 12.gf3+=) 11.Bc6= bc6 12.d3 (12.f3 Qe7=) 12...Re8 (12...a5 13.de4 Ne4 14.Qg4=) 13.Bf6 (13.c4!?=) 13...Qf6+= 14.Nd2 Be5 (14...Qe5 15.g3+=) 15.Rab1 (15.d4 Bd6+=) 15...ed3 16.cd3 d4 (16...a5 17.Nf3=) 17.e4 (17.Ne4 Qe6+=) 17...Rab8 (17...a5 18.ba5 Ra5 19.Nc4+=) 18.Nb3 (18.Qf3 Qh6 19.Nb3 Ra8+=) 18...Bd6 (18...Qf4 19.g3 Qg5 20.Kh2+/–) 19.Qb2 (19.f4 c5 20.e5 cb4+/–) 19...Be5 (19...c5!? 20.bc5 Bc5=) 20.Nc5 Ra8 21.g3 Qd6? (21...Qf3 22.Rfe1+=) 22.Nb7 (better is 22.f4 Bf6 23.e5 Be5 24.fe5 Qe5 25.Rf4+-) 22...Qe6 (22...Qd7 23.Kg2+/–) 23.Nc5 (better is 23.Kg2+/–) 23…Qh3 +=. minn (2000) – mwojo (1745), net–chess.com, 2004.

6.Nf3 Bg4 7.h3 Bf3 8.Qf3 a6 9.Bc6 =.

6.Bc6= bc6 7.Be5 a5 8.ba5 Ng4 9.Bc3 +/–.

6.Bc6= Bc6 7.Be5 a5!? 8.ba5 (8.b5 Bb5= 9.Nc3=) 8...Ra5 9.Nf3 +=.

6.Bc6= Bc6 7.Be5 Bd6 8.Nf3+= (8.Bd6 Qd6 9.Ne2+=) 8...0-0 (8...a5 9.Bd6+= (9.Nc3 Ne4 10.Bd6 Qd6 11.Nd4+=)) 9.0-0 (9.Bd6 Qd6 10.Nc3 a5+=) 9...Qe7 (9...a5 10.Nc3+=) 10.Bd6 cd6 (10...Qd6 11.Nc3+/–) 11.Nc3 (11.Nd4 a5 12.b5 Bd7+/–) 11...Ne4 12.d3?? (better is 12.a4+/–) 12...Nc3-+ 13.Qd2 d4! 14.ed4?? (14.ed4 Ne2; 14.Nd4 Na4) 14...Bf3 (better is 14...Ne2 15.Kh1 Bf3 16.gf3 Nd4 17.Rae1-+) 15.Rfe1 (15.gf3 Ne2 16.Kg2 Nd4 17.c3-+) 15...Ne4! 16.gf3? (16.de4 Bg4; 16.Re4 Be4) 16…Nd2-+ (16...Nd2 17.Re7 Nf3 18.Kg2 Nd4-+) 0–1. saetta – loves, ICS, 1999.

6.Ne2 Bd6 7.d3 0-0 8.c4 a6 (8...dc4 9.Bc4 a6 10.0-0+=) 9.cd5?? (better is 9.Bc6 Bc6 10.c5+/–) 9...Nd5 10.Bc4 Nf6 white timed out 0–1. alaamattar (2215) – tjong (2285), net–chess.com, 2012.

6.Nf3 e4= 7.Bc6 Bc6 8.Ne5 Qd6 =.

6.Nf3 e4+= 7.Nd4 a6 8.Nc6 bc6 9.Ba4 (9.Be2 c5=) 9...Qb8 (9...a5!?+=) 10.Bf6 gf6 11.0-0 Bg7 12.Nc3 f5 13.Rb1 0-0? (better is 13...Rg8!?+=) 14.Nd5!+- Rd8? (14...cd5 15.Bd7) 15.Ne7 Kf8 16.Nc6 Bc6? (better is 16...Qb6 17.Nd8 Ba4 18.Nf7 Kf7+/–) 17.Bc6+- Ra7 18.c4 (18.d4!? Qb6 19.d5 a5+-) 18...Qc8 19.a4 (19.f3 Rd6 20.Bd5 c6 21.Be4 fe4 22.fe4 Rd3+/–) 19...Qe6 20.Bd5 Qg6 21.b5 ab5 22.ab5 (worse is 22.Rb5 c6 23.Rb6 Rd6 24.Rb8 Ke7+=) 22...Be5 (22...Ra3 23.f3 Rd7 24.fe4 fe4 25.Rf4+-) 23.Qb3 (23.f3 Qh5 24.g3 f4 25.fe4 Qd1 26.Rbd1 Rd5 27.ed5 fg3 28.hg3 Bg3+-) 23...Qf6 (better is 23...Qd6+-) 24.Bc6?? (better is 24.f3 Qh4 25.g3+-) 24...Rd2+/– 25.Bd5 (25.c5 Qh4 26.g3 Qg5+/–) 25...Qh6 (better is 25...Raa2+=) 26.Qb4?? (better is 26.h3 Raa2 27.c5+/–) 26...Ke8 (better is 26...Bd6 27.Qd6 Qd6-+ (27...cd6?! 28.b6 Raa2 29.b7-/+)) 27.h3 (better is 27.Bc6 Rd7 28.Bd7 Kd7+-) 27...Rda2?? (27...Raa2 28.Rfd1 Rd1 29.Rd1+-) 28.c5 R2a5 29.c6 Qd6 30.Qd6 Bd6 31.f3 Bc5 32.fe4 Be3 33.Kh1 f4 34.g3 Ra4 35.gf4+- Re4?? (35...Ra3+-) 1–0. ahmed sharkawy_1 – boldeagle, ChessWorld.net, 2005.

6.Nf3 e4= 7.Ng5 Ng4 (7...h6 8.Nh3-/+) 8.f3 (8.Nh3 Nce5 9.Bd7 Qd7=) 8...ef3 (better is 8...Qg5 9.fg4 Bg4-/+) 9.Qf3?? (better is 9.Nf3 a5 10.ba5 Ra5 11.a4=) 9...Qg5-+ 10.Rf1 (10.0-0 0-0-0 11.Qf7-+) 10...f6 11.Qf4 Qf4 12.Rf4 (12.ef4 Nh2 13.Rh1 Ng4-+) 12...Nh2 13.Nc3 Bd6 14.Rf2 (14.Nd5 Bf4 15.Nf4 Ng4-+) 14...Bg3 15.Bc6 Bc6 (better is 15...bc6 16.Ne2 Bf2 17.Kf2 Ng4 18.Kf1-+) 16.d4 (16.Ke2 Bd7-+) 16...Bf2 (better is 16...Ng4 17.Nd1-+) 17.Kf2 Ng4 (better is 17...f5 18.b5 Bd7 19.Nd5-+) 18.Ke2 (18.Kf3 f5 19.b5 Bd7 20.Nd5 Kd8-+) 18...0-0 (18...0-0-0 19.Kd2-+) 19.Kd3 (19.Kf3 f5 20.b5 Bd7 21.Nd5 c6-+) 19...Rae8 20.Re1 (20.b5 Bd7 21.Re1 Bf5 22.Kd2 Be4-+) 20...f5 21.g3 Nf6 22.Ne2 f4 23.gf4 Ng4 24.Ng3 Rf7 25.c4 Rfe7 26.Nf5 dc4 27.Kc4 Bd7 28.Ne7 Re7 29.e4 c6 30.e5 b5 31.Kc5 Nf2 32.Rf1 Nd3 33.Kd6-+ Rf7 34.Ba1 Nf4 35.Rf4 Rf4 Theme: Deflection from d7 36.Kd7 h5 37.e6 Re4 38.Kc6 a6 39.Kd7?? h4-+ 40.e7 Kf7 41.d5 h3 42.d6 h2 43.Bg7 h1Q 44.Bf8 Qh3 45.Kc7 Rc4 46.Kd8 Qc8 0–1. Cleopatre – therocketman, internet, 2007.

6.Qc2 de3 7.de3 a6 8.Nd2 Qd6 9.Ngf3 Nd7 10.b5 ab5 11.cb5 Nd8 12.Ne4 Qg6 13.Qc4 f6 14.Nh4 Qh5 15.Be2 Qh6 16.Nf5 Nb6? (16...Qg6 17.Neg3 Nb6 18.Qc7 Nd5 19.Nd6 Bd6 20.Qd6 Qc2 21.Be5 Nf7 22.Qd5 fe5+-) 17.Qc7?? (better is 17.Nh6 Nc4 18.Bc4+-) 17...Nd5?? (better is 17...Bf5 18.Ng3 Nd5 19.Nf5 Nc7 20.Nh6 gh6-/+) 18.Ned6 (18.Nh6?! Nc7 19.Rc1 Nd5+/–) 18...Bd6 19.Nd6 (19.Qd6?! Bf5 20.Qd5 Qg6+/–) 19...Kf8 20.Qd8 1–0. combijack (1790) – ciano999 (1670), gameknot.com, 2012.

6.c5 Be7 7.Bb5 0-0 8.Qf3 (8.Bc6!? bc6 9.Nf3=) 8...Bg4 9.Qg3 de3 10.Qe3? (10.fe3 e4=) 10...e4 (10...Nd4 11.Ba4 Nd5 12.Qg3-+ (12.Qe5?? Bf6 13.Bd4 Be5 14.Be5 Nb4 15.ab4 Qd5-+)) 11.h3 Nd5 (better is 11...Bd7!? 12.Nc3 a5 13.Ne4 Ne4 14.Qe4 Re8-/+) 12.Qe4+= Be6 13.Bd3 Bh4?? (better is 13...g6 14.Qf3 Bf6 15.Bf6 Nf6+=) 14.Qh7 1–0. Eries – interloper, ChessWorld.net, 2011.

6.c5 Bf5 7.Bb5 A) 7...Bg4 A1) 8.Qb3 Be6 (8...Qe7 9.Bc6 bc6 10.Qd3 Qe6 11.ed4 Rd8 12.Qe3 ed4 13.Qe6 fe6=) 9.Bc6 bc6 10.Qa4 a5 11.ed4 ab4 12.Qc6 Bd7 13.Qf3 e4=; A2) 8.Qc2 Qd7 (8...a5 9.Bc6 bc6 10.ed4 ed4 11.Qd3 Qe7 12.Kf1 Bc8 13.Ne2 Ba6+=) 9.ed4 ed4 10.Ne2 Be2 11.Be2 0-0-0 12.d3 Re8 13.0-0 Qf5=; A3) 8.Bc6 bc6 9.f3 Be6 10.ed4 ed4 11.Ne2 d3 12.Nd4 Qd7 13.0-0 Be7+=; B) 7...a5 B1) 8.Nf3 ab4 (8...Bg4 9.h3 Bd7 10.Bc6 Bc6 11.Ne5 Bg2 12.Rh2 Bd5 13.Bd4 ab4+=) 9.ed4 ba3 10.Ra3 Ra3 11.Na3 e4 12.Ne5 Be7 13.Bc6 bc6+=; B2) 8.ed4 ed4 9.Nf3 ab4 10.Qe2 Qe7 11.Nd4 Bb1 12.Nc6 Qe2 13.Ke2 Be4+/– 1.34; C) 7...Qd5 8.Nf3 0-0-0 (8...Bg4 9.ed4 Qe4 10.Qe2 Qe2 11.Be2 Bf3 12.de5 Bg2 13.Rg1 Nd7+/–) 9.Qa4 Kb8 10.0-0 Bg4 11.Bc6 bc6 12.Nh4 Be7 13.ed4 ed4=; D) 7...de3 8.Bc6 bc6 9.fe3 a5 10.Be5 Nd7 11.Bc3 ab4 12.Bb4 Bc5 13.Bc3 Qh4+=.

6.c5 Bf5 7.d3 Be7 (7...de3 8.fe3 Ng4 (8...e4 9.b5 Nb8 10.d4 Ng4 11.Qe2 Qg5 12.Bc1 Qf6 13.Qc2 Qh6=) 9.Qe2 Qf6 10.Nf3 0-0-0 11.Qd2 Be4 12.Be2 Qh6 13.Nc3 Bg6+=; 7...Qe7 8.Qa4 (8.b5 Nd8 9.Qe2 Ne6 10.Qf3 Qc5 11.Qf5 Qc2 12.Nd2 Qb2 13.Rb1 Qa3-+; 8.Nf3 de3 9.fe3 e4 10.Nd4 Nd4 11.Bd4 0-0-0 12.c6 Rd4 13.cb7 Kb8-/+) 8...Nd7 (8...de3 9.fe3 e4 10.d4 Nd5 11.Nc3 Nc3 12.Bc3 Qh4 13.g3 Qg5=) 9.Nd2 de3 10.fe3 Qh4 11.g3 Qh6 12.Nc4 Be6 13.Bc1 Qg6+=; 7...Be6 A) 8.Qa4 Nd7 (8...de3 9.fe3 Ng4 10.Nf3 Ne3 11.Ne5 Bd5 12.Ke2 Nf1 13.Rf1 Qe7-/+) 9.Nf3 Bd5 10.Nbd2 a5 11.Qb5 Ra6 12.e4 Na7 13.Qa6 ba6-/+; B) 8.Nf3 a6 (8...de3 9.fe3 Nd5 10.Qd2 f6 11.b5 Nce7 12.e4 Nf4 13.d4 Ng8+=) 9.Be2 Be7 10.ed4 ed4 11.0-0 0-0 12.Ng5 Bd5 13.Re1 Re8+=; 7...a5 8.ed4 (8.b5 Na7 9.Qf3 Be6 10.Qg3 Nb5 11.a4 Na7 12.Qe5 Nc6 13.Qg5 h6-+) 8...ed4 (8...Nd4 9.Nf3 Qd5 10.Nd4 ed4 11.Nd2 Bg4 12.f3 Be6 13.f4 Bg4+=) 9.Nf3 ab4 10.ab4 Ra1 11.Ba1 Qe7 12.Kd2 Nb4 13.Bd4 Na6-/+) 8.Qa4? (better is 8.b5!? Nb8 9.Qc1+= 0-0 10.ed4 ed4 11.Nf3 Re8 12.Be2 a6 13.Qc4 ab5-/+; 8.Nf3 de3 (8...a6 9.ed4 ed4 10.Be2 0-0 11.0-0 Qd7 12.Nbd2 Nh5 13.Nb3 Bf6=) 9.fe3 e4 10.b5 Nb8 11.c6 bc6 12.Nd4 Bg4 13.Qa4 ed3-/+) 8...de3-+ 9.fe3 0-0 10.b5 Bc5 (better is 10...Nb8 11.Be5 Bd3+=) 11.bc6+/– bc6 12.Bc1 (12.e4 Ne4 13.de4 Qh4 14.Kd1 Rad8 15.Nd2 Bg1+=) 12...e4 (better is 12...Ng4=) 13.d4+/– Bd4?? (better is 13...Bd6+/–) 14.ed4 Nd5 15.Qc6 Qh4 16.g3 Qg4 17.Qd5 Rad8 18.Qc5 e3 19.Be3 Rfe8 20.Qc3 Qd1 21.Kd1 Bg4 22.Kc1 Be6 23.Qc7 a6 24.Ba6 Bg4 25.Qf4 f5 26.h3 Re4 27.Qf2 Re3 28.Qe3 Kf7 29.hg4 Re8 30.Qb3 Kf8 31.Rh7 Re1 32.Kb2 fg4 33.Rh8 Ke7 34.Qb4 Kf7 35.Qe1 Kg6 36.Qe6 Kg5 37.Qe5 Kg6 38.Bd3 Kf7 39.Qe8 Kf6 40.Nd2 Kg5 41.Ne4 Kf5 42.Rf1 1–0. Eries – interloper, ChessWorld.net, 2011.

6.ed4 ed4 7.Nf3 (7.Qe2 Be7 8.Qd3+=) 7...Bd6 (7...d3 8.Ne5 Ne5 9.Be5 Ng4 10.Qa4 Bd7-+) 8.Qe2+= (8.Bd4? Nd4 9.Nd4 Be5-+) 8...Be6 9.Ng5 (9.b5 d3 10.Qd3 Na5+=) 9...0-0 10.Ne6 fe6 11.Qe6 (11.Ra2 a6 12.Qe6 Rf7=) 11...Kh8 12.Qh3?? (better is 12.Kd1=) 12...Qe7-+ 13.Kd1?? (13.Be2 Rae8 14.Qd3-+) 13...Ne4 14.Kc1 Nf2 15.Qh5 White intends c5 15...Nh1 16.Bd3 Rf1! 17.Bf1 Nf2 18.c5?? Be5 19.d3 Bf4 20.Kc2 Qe1?? 21.Be2 g6 22.Qd5?? Qb4 23.Qc6?? bc6?? 24.ab4+- Re8 25.Bd4 Kg8 26.Bf3 Re6 27.Bf2 Kf7 28.Ra7 Re8 29.Nc3 Re7 30.Ne4 Ke6 31.g3 Bh6 32.Bg4 Kd5 33.Nf6 Ke5 34.Ng8 Rg7 35.Nh6 1–0. thedesertfox (1905) – bar (1935), net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

6.Nf3 Ne4 7.ed4+- ed4 8.Qe2 Qe7 9.d3 (9.Nd4 Nd4 10.Bd4 a5+-) 9...Nc3 (9...Nf6 10.Nbd2+-) 10.Nc3 (10.Qe7 Ke7 11.Nc3 dc3 12.Bc3 Bg4+-) 10...dc3 11.Bc3 Qe2 (11...Bg4 12.Qe7 Ke7 13.Be2+-) 12.Be2 Bg4 (12...a5 13.b5 Ne7 14.Kd2+-) 13.d4 Be7 (better 13...Bd6+-) 14.d5 Nb8 15.Bg7 Rg8 16.Bc3 (16.Be5 a5 17.ba5 Kd8+-) 16...Bd6 (16...Nd7 17.Kd2+-) 17.Bd3 (17.c5 Bf4+-) 17...Nd7 (17...Bf3 18.gf3 h5+-) 18.Bh7 Bf3 (18...Rf8 19.Nd2+-) 19.Bg8 (worse 19.gf3 Rg5+-) 19...Bh5 (19...Bg2 20.Rg1 Bf3 21.Kf1 Bh2 22.Re1 Kf8 23.Rg7+-) 20.Bh7 0-0-0 (20...Kf8 21.Kd2+-) 21.f3 (21.Kd2 Bg6 22.Bg6 fg6+-) 21...Re8 22.Kf2 f6 (22...Bg6 23.Bg6 fg6 24.c5+-) 23.Bf5 (23.g4 Bf7+-) 23...Kd8 (23...Be5 24.Rac1+-) 24.Rhe1 (24.g4 Bf7+-) 24...Ne5 (24...Be5 25.Rac1+-) 25.f4 Ng4 (25...Nd7 26.g4 Bf7 27.Re8 Be8 28.Ke3+-) 26.Bg4 Bg4 27.Bf6 Kd7 28.Re8 (28.Re8 Ke8 29.Re1 Kf7 30.Be5+-) 1–0. Janek – Quizaj, internet, 2018.

6.Nf3 Be7 7.Bd3?? (better is 7.b5!? Nb8 8.Ne5 de3 9.fe3+=) 7...0-0 (7...e4 8.Be4 Ne4 9.d3-+) 8.0-0? (8.Qc2 Bg4+=) 8...Bg4 (better is 8...de3!? 9.Qc2 ef2 10.Kh1 Bb4 11.Ne5 Nd4 12.Bd4 Qd4-+) 9.h3= Bd7 (better is 9...Bh5 10.g4 e4 11.gh5 de3=) 10.ed4?? (10.b5 e4 11.Be4 Ne4 12.bc6 de3 13.cd7 ef2 14.Rf2 Nf2 15.Kf2 Qd7=) 10...ed4?? (better is 10...e4 11.Bc2 ef3 12.Qf3 Re8-/+) 11.b5 (11.Nd4? Nd4 12.Bd4 Be6 13.Bh7 Nh7-+) 11...Na5 12.Nd4 c5 13.bc6 bc6 14.Re1 c5 15.Nf5 Nc6?? 16.Ne7+- Ne7 17.Bf6 gf6 18.Nc3 a6 19.Qh5 f5 20.Re7 Qe7+/– 21.Nd5 Qd6 22.Qg5 Kh8= 23.Rb1 Rae8 24.Rb6 Re1 25.Bf1 Qe5 26.Ra6 Qe2 27.Ne3 Qd2?? 28.Qf6+- Kg8 29.Qg5 Kh8 30.Qe7 Re8 31.Qc5 f4= 32.Ra8?? Ra8-+ 33.Qe5 Kg8 34.Qg5 Kf8 35.Qc5 Kg8 36.Qg5= Kf8 37.Qc5 Kg8 38.Qg5= ½–½. mgriffin – tdutcher, net–chess.com, 2001. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6 5.c4 d4)

6.Nf3 Bg4 +=.

6.b5 e4 7.bc6 ef3 8.Qf3 bc6 9.Bf6 Qf6 (worse is 9...gf6 10.c4+/–) 10.Qf6 gf6 +=.

6.Bb5 Bd7 (6...Qe7 7.d4 e4 8.Ne5=) 7.Nc3 (better is 7.Bc6 Bc6 8.Ne5+/–) 7...0-0 8.0-0 a6 (8...a5 9.Bc6 Bc6 10.b5+=) 9.Ba4 b5 10.Bb3 Be6 11.Ne2 (11.d3 Ne7=) 11...e4 (11...Bg4+=) 12.Ng5 (12.Nfd4 Nd4 13.Nd4 Bd7=) 12...Ng4 (better is 12...Bh2 13.Kh2 Ng4 14.Kg1 Qg5-+) 13.Ne6?? (better is 13.f4 ef3 14.Nf3=) 13...Bh2-+ (13...fe6?! 14.Nf4 Qh4 15.h3 Bf4 16.ef4+=) 14.Kh1 fe6 Threatening mate... how? 15.Nf4 (15.Ng1 Qh4 16.Nh3 Rf2 17.Rf2 Nf2 18.Nf2 Be5 19.Kg1 Bb2-+) 15...Qh4 (better is 15...Rf4 16.ef4 Qh4 17.Qg4 Qg4 18.Kh2 Qf4 19.Kg1 Qd2-+) 16.f3 (16.Nh3 Rf2! 17.Rf2 Nf2 18.Nf2 Be5 19.Kg1 Bb2 20.Ra2-+) 16...Bf4 17.Kg1 Bh2 (17...Qh2) 18.Kh1 Be5 0–1. esso78 – PiedPiper, ChessWorld.net, 2004.

6.c4 Bf5 (better is 6...e4!? 7.Nd4 Nd4 8.Bd4 dc4 9.Bc4 a5+=) 7.b5 (7.c5 Be7 8.Ne5 Ne5 9.Be5 0-0+=) 7...e4 (better is 7...Ne7 8.Be5 Be5 9.Ne5 d4+=) 8.Nd4 (better is 8.bc6 ef3 9.cb7+/–) 8...Nd4+= 9.Bd4 0-0 (9...dc4 10.Bc4 0-0 11.Nc3=) 10.c5 (10.Nc3 c6+=) 10...Be7 11.Nc3 (11.Be2 Nd7 12.Qc2 c6+=) 11...h6 (11...c6 12.Rb1+=) 12.Be2 (12.d3 c6=) 12...Qd7 (12...Nd7 13.Bg4 Be6 14.c6 bc6 15.Be6 fe6 16.bc6+=) 13.Qb3 (13.0-0 Qe6=) 13...Rab8 (13...c6 14.0-0=) 14.a4 (better is 14.0-0=) 14...Ng4? (14...Rbd8 15.0-0=) 15.h3 (better is 15.Qd5 Nf6 16.Qd7 Nd7 17.c6 bc6 18.bc6+-) 15...Nf6= 16.g4 (16.0-0 c6=) 16...Bg6 (16...Be6 17.d3=) 17.g5 (17.h4!? c6 18.g5 hg5 19.h5=) 17...hg5+= 18.Bf6 (better is 18.h4!? gh4 19.Rh4+=) 18...Bf6-/+ (18...gf6?! 19.Nd5 Rfd8 20.Ne7 Qe7 21.Qc3+=) 19.Qd5?? (better is 19.Rd1 d4 20.Nd5-/+) 19...Qd5-+ 20.Nd5 Ba1 21.0-0 Be5 22.Ne7 Kh8 23.Nd5 Rbc8 24.Ne7 Rcd8 25.Ng6 fg6 26.Rd1 Rd7 27.d4 Bf6 28.a5 Kg8 29.Bg4 Re7 30.d5 Re5 31.Be6 Kh8 32.Kg2 Rd8 33.Rg1 b6 34.ab6 (34.cb6 cb6 35.a6 Be7-+) 0–1. michas – mcac, internet, 2007. (=1.a3 e5 2.b4 d5 3.Bb2 Nc6 4.e3 Nf6)

6.d4 0-0?? 7.Be2?? (better is 7.de5 Ne5 8.Be5 Be5 9.Ne5+-) 7...ed4 8.Bd4 Nd4 9.Qd4 Qe7 10.0-0 Ne4 (10...a5 11.b5+=) 11.Nc3 (11.Qd5 Rd8 12.Qc4=) 11...Qe6 (better is 11...Nc3!? 12.Qc3 Bf5+=) 12.Nd5+/– Bh2?? (better is 12...c5 13.Qd3 Bd7+/–) 13.Kh2 Qh6 (13...Qd6 14.Kg1 Re8 15.Bd3+-) 14.Kg1 Bf5 (14...Nd6 15.Nc7 Nf5+-) 15.Ne7 Kh8 16.Nf5 Qg6 17.Ne7 (better is 17.Qe4 Rfe8 18.Qf4 Qf6+-) 17...Qg4 18.Rad1 Qh5 (18...Qe6 19.Bd3 Nf6 20.Nf5+-) 19.Bd3 (better is 19.Qe4!? c6+-) 19...Ng3 (19...Nf6+-) 20.fg3 Rad8 21.Qe4 f5 22.Nf5 Rf5 23.Qf5 Qf5 24.Bf5 Rd1 25.Rd1 Kg8 26.Rd8 Kf7+- 27.Rd7 Kf6 28.Rc7 Kf5 29.Rg7 Ke4 30.Rh7 Ke3 31.Rb7 a5 32.Ra7 Ke2 33.Ra5 Kd1+- 34.c4 Kc1 35.c5 Kb2 36.c6 Kb3 37.c7 Ka2 38.c8Q Kb2 39.Re5 1–0. pieeater – interloper, ChessWorld.net, 2011.

6.d4 e4 7.Nfd2 0-0 8.Be2 Be6 9.c4 dc4 10.Nc3 Nd5 11.Nde4 Nc3 12.Nc3 Ne7 13.d5 Bf5 (better 13...Bd5 14.Nd5 Nd5=+) 14.e4+/- Bg6 15.h4 h6 16.h5 Bh7 17.Bc4 c6 18.Qg4 f5? (18...Be5!? 19.0-0 Rc8+/-) 19.Qh4 (19.ef5!? Bf5 20.Qd4 Rf7 21.dc6 Nc6 22.Bf7 Kf7 23.Qd5 Be6+-) 19...Kh8 20.0-0-0?? (better 20.Rd1+-) 20...fe4=+ 21.Ne4?? (better 21.Qg4 Rf2 22.dc6 bc6 23.Ne2=+) 21...Bf4-+ 22.Rd2 (22.Nd2 cd5 23.g3 Bd2 24.Rd2 Rc8-+) 22...cd5 (better 22...Be4 23.Kd1 cd5-+) 23.Qg4 Bd2 24.Nd2 Nf5 25.Bd3 Rc8 26.Kb1 Qd7 27.Re1 Rfe8 28.Re3 Re3 (28...Ne3 29.Qd7 Bd3 30.Ka2+-) 29.fe3 Qf7 30.Ka1 Re8 31.Nf3?? (31.Bf5 Bf5 32.Qd4-+) 31...Ne3 32.Ne5 (32.Qd4 Bd3 33.Qd3 Qh5-+) 32...Ng4 (better 32...Re5 33.Qf3 Qf3 (33...Bd3? 34.Qf7 Nc2 35.Ka2+-) 34.gf3 Rh5-+) 33.Nf7 Kg8 34.Bh7 Kh7 35.Nd6 Re1 36.Ka2 Re2 37.Nb7 (37.Kb3 Rg2 38.Nb7 Rg3 39.Ka4 Ne3-+) 37...Rg2 (better 37...d4!? 38.Nc5 Nf2 39.Kb3-+) 38.Nc5 Nf6 39.Kb3 Nh5 40.b5 Nf6 41.a4 h5 42.a5 h4 (better 42...Rg3!? 43.Kb4 Rg4 44.Ka3-+) 43.b6 ab6 44.a6 (44.ab6 Rg3 45.Ka4-+) 44...h3 45.a7 (45.Be5 bc5 46.a7 c4 47.Ka3 Rg1-+) 45...h2 46.Ne6 (46.Na4 h1Q 47.a8Q-+) 46...h1Q 47.Nf8 Kg8 (47...Kh6 48.a8Q Qb1 49.Qa1 Qc2 50.Ka3 Qc5 51.Ka2 Qc4 52.Ka3 Qa6 53.Kb4 Rg4 54.Bd4 Qa1 55.Kb5 Rd4 56.Kc6 Rc4 57.Kb7 Qa4 58.Nh7 Qc6 59.Ka7 Ra4 60.Kb8 Nd7) 48.a8Q Qh3 (48...Qb1 49.Nd7 Kh7 50.Nf6 gf6 51.Qa7 Kg6 52.Qa3 Re2 53.Ka4 Qc2 54.Qb3 b5 55.Kb4 Re4 56.Bd4 Rd4 57.Ka5 Qb3 58.Kb6 Ra4 59.Kc6 Qc4 60.Kb6 Ra8 61.Kb7 Qc8 62.Kb6 Ra6 63.Kb5 Qc4) 49.Ka2 Qf5 (better 49...Kf7 50.Qb8-+) 50.Nd7 (50.Ne6 Kh7 51.Nf8 Kh6-+) 50...Kf7 51.Ne5 (51.Qf8 Kg6 52.Nb6-+) 51...Qe5 52.Qb7 Kg6 53.Qg7 Kg7 54.Ka3 Qb2 55.Ka4 b5 (55...b5 56.Ka5 Ne4 57.Kb6 Qf6 58.Ka5 Ra2 59.Kb5 Kg6 60.Kb4 Qb6; 55...Rg4) 0-1. Arka50 (2660) - susamkapara (2440), Rated Bullet tournament 0FwSbhhi, lichess.org, 2015.

6.Be2 Kf8 (6...0-0!?+=) 7.0-0 Bh3?? (7...a6 8.d3+=) 8.Ng5?? (better is 8.gh3 a6+-) 8...e4?? (better is 8...Bf5=) 9.Nh3+- (9.gh3?! h6 10.Ne4 de4+/–) 9...Qe7 (9...Kg8 10.f4+-) 10.d3 (10.f3 Be5 11.Nc3 Kg8+-) 10...ed3 (10...Kg8 11.Nd2 Rd8 12.Kh1+-) 11.Qd3 Rd8 12.Nc3 Be5 13.b5 Bc3 14.Bc3 Ne5 15.Be5 Qe5 16.a4 Ne4 17.c4 Nc5 18.Qd4 Qd6 19.Ra3 Kg8 20.Ng5 Ne4 21.Ne4 Qa3 22.cd5 f6 23.Bc4 Qa4 24.Nc5 Rd6 25.Nb7 Rb6 26.Nc5 Qb4 27.d6 Qc4 28.dc7 Qd4+- 29.c8Q Kf7 30.Qh8 Qc5 31.Qh7 Qg5 32.Rc1 Qe5 33.Rc7?? Ke6 34.Qg8 Kf5 35.Qc8 Ke4 36.Qg4 Kd3 37.Qc4 Kd2 38.Qc2 Ke1 39.Qc1 Ke2 40.Rc2 Kd3 41.Qd2 Ke4+- 42.Rc3 Qc3 43.Qd1 Rb5-+ 44.f3 Kf5 45.e4?? Kg5 46.h4 Kh4 47.g3 Kg3 48.Qd6 Kf3 49.Qd1 Ke4 50.Qg4 Ke5 51.Qe2 Kd6 52.Qb5 Qc5 53.Qc5 Kc5 54.Kf1 g5 55.Kg1 f5 56.Kg2 a5 0–1. pieeater – interloper, ChessWorld.net, 2010.

6.Nd4 Nd4 7.Bd4 Be7 8.c4 0-0 9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 (11.dc3 a5=) 11...b6 (11...Bf5 12.Qh5 Qd7 13.Be2+=) 12.Be2 Bb7 13.0-0 Bf6 (13...Bd6 14.f3=) 14.Bf6+= Qf6 15.f3 a5 16.b5 Rad8 17.fe4 Qh4 (17...Qe5!?=) 18.Rf4+/– Qg5 19.d4 (19.Qc2 Qg6+/–) 19...Rde8 (19...f5 20.Rc1+=) 20.Bf3 (better is 20.Qc2!?+/–) 20...Qb5+= 21.e5 Bf3 22.Qf3 Qb2 (22...Qb3!?=) 23.Qf2?? (better is 23.Rf1 Re7 24.a4+=) 23…Qa1-+ (23...Qa1 24.Qf1 Qa3-+) 0–1. Fournier,Frederic (1820) – JACAROL, Active, 2007.

6.Nd4 Bd6 7.Be2 (7.Nc6 bc6 8.Nc3 0-0 9.Be2 Qe7 10.0-0 Bd7 11.Na4 a5 12.Nc5 ab4) 7...Bd7 (7...0-0 8.Nc6 bc6 9.Nc3 Qe7 10.0-0 Bd7 11.Rb1 Rfb8 12.Ba1 h6) 8.Nc6 bc6 9.Nc3 a5 10.b5 0-0 11.0-0 Qe7 12.a4 Rfb8.

6.Nd4 Bd7 7.Bb5 Nd4 (7...a5 8.Nc3 ab4 9.ab4 Bb4 10.Ra8 Qa8 11.0-0 Nd4 12.Bd7 Kd7) 8.Bd7 Qd7 9.ed4 (9.Bd4!? Be7 10.Nc3+= 0-0 11.0-0 a5 12.b5 Qe6) 9...Bd6-/+ 10.0-0 (10.Nc3 0-0 11.0-0 a5 12.b5 c5) 10...c6 (10...0-0 11.d3-/+ (11.Nc3 Rfe8 12.Qe2 c6) 11...a5 12.ba5 Ra5) 11.Re1 (11.d3 Qc7 (11...0-0 12.de4 de4) 12.h3 (12.Nc3 0-0) 12...0-0+=; 11.f3 0-0 12.fe4 Ne4) 11...Bc7 (11...Qf5 12.f3-/+ (12.Qe2 0-0) 12...0-0; 11...0-0 12.Nc3 a5) 12.Nc3 Bb6 (12...Qd6 13.g3 0-0 14.d3+=; 12...0-0-/+) 13.Ne2 (better is 13.d3!?+/–) 13...Qd6 14.c3 Ng4 (14...Bc7 15.Ng3 0-0+=) 15.g3 (15.Ng3 h5 16.h3 Nf2=) 15...Qf6 (better is 15...Qh6!? 16.h4 g5-/+) 16.Nf4= Qg5 (better is 16...Qf5!?=) 17.d3 Bc7 (17...Nf6 18.f3+/–) 18.Bc1 (18.h4!? Qf5 19.f3+/–) 18...Bf4= 19.Bf4 Qf5 (19...Qh5!? 20.h4 Qg6+/–) 20.de4 de4 21.c4 (21.f3 Nf6 22.fe4 Qg6+/– (22...Ne4?? 23.Qf3+-)) 21...Qh5? (21...0-0-0!?=) 22.h4 (22.Re4!? Kd7 23.h4+-) 22...f5 23.d5 Rd8 24.d6 Rd7 25.c5 0-0 26.Qd4 b6?? 27.cb6+- ab6 28.Qb6 Rc8 29.Rac1 Qg6 30.a4 Nf6 31.a5 Nd5+/– 32.Be3?? Qd6 33.Qd4 Nb4?? 34.Qd6+- Rd6 35.Rc3?? Ra8 36.Bc5 Nd5 37.Bd6 Nc3-/+ 38.Kg2 Ra5?? 39.Kh3?? Nb5 40.Bf4 c5 41.Rd1 g6 42.Rd8 Kf7 43.Rd7 Ke6 44.Rh7 Ra2 45.Be3 c4 46.Rg7 Kf6 47.Rb7 c3?? 48.Rb5+/– c2 49.Rb6 Ke5 50.Rg6+- Ra1 51.h5 Kd5 52.Rg5 c1Q? 53.Rf5?? Ke6+/– 54.Kg4?? Qd1-+ 55.Kf4 Qf3 56.Kg5 Qf5 57.Kh4 Rh1 0–1. pieeater – allknight, ChessWorld.net, 2010.

6.Nd4 Bd7 7.c4 dc4 (7...a5 8.b5 Ne5 9.cd5 Nd5 10.Qc2 Qh4 11.Be2 f5 12.Nf5 Nd3) 8.Nc6 Bc6 9.Bc4 Bd6 10.Bd4 b5 11.Be2 Qd7 12.0-0 0-0.

6.Nd4 Bd7 7.Nc6 bc6 8.Nc3 a5 9.b5 Bd6 10.Be2 0-0 11.0-0 Qe8 12.a4 Qe5.

6.Nd4 Bd7 7.Be2 Nd4 (7...Bd6 8.Nc6 bc6 9.Nc3 a5 10.b5 0-0 11.0-0 Qe7 12.a4 Rfb8) 8.Bd4 a5= 9.Nc3 Bd6 10.Qb1 ab4 11.ab4 Ra1 12.Qa1 0-0.

6.Nd4 Be7 7.Be2 Qd6 (7...0-0 8.0-0 Qd6 9.Nc6 bc6 10.Nc3 a5 11.b5 h6 12.bc6 Qc6) 8.0-0 0-0 9.Nc6 bc6 10.Nc3 a5 11.b5 h6 12.Rb1 c5.

6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.Nc3 a5 10.Be2 Bd7 11.ba5 Ra5 12.Qb1 b6.

6.c4 d4 7.c5+= Be7 8.Nf3 Bf5 (better is 8...de3 9.de3 Qd1 10.Kd1 e4=) 9.Nh4?? (9.b5 Na5 10.Qa4 b6 11.Ne5 de3 12.de3 Qd5 13.cb6 ab6=) 9...Qd7 (better is 9...Be6!? 10.Nf3 0-0-/+) 10.Nf5+= Qf5 11.Qb3?? (11.Bb5 0-0+=) 11...0-0 (better is 11...Ne4 12.Bd3 Qf2 13.Kd1 Qg2 14.Be4 Qe4-+) 12.Be2+= Rfd8 13.ed4 (13.0-0!?+=) 13...Nd4-/+ 14.Bd4 Rd4 15.0-0 Nd5 16.Nc3 Nf4 17.Bf3? (better is 17.Bg4 Qg6 18.Ne2 Ne2 19.Be2 Rd2 20.Qe3-/+) 17...Nh3! 18.gh3 (18.Kh1 Rh4 19.Nd5-+) 18...Qf3 19.Rae1 Qh3 20.Re3 Rg4 21.Rg3 Rg3 22.fg3 Qg3 23.Kh1 Qh3 24.Kg1 Rf8 25.Qd1 Rd8 26.Qf3 Qh4 27.Qf7 Kh8 28.Nd5 Qg4 29.Kf2 Rf8 30.Qf8 Bf8 31.Ke1 Qh4 32.Kd1 Qg4 33.Ke1 Kg8 34.Rf6 Qh4 (34...Qh4 35.Rf2 Qh1 36.Ke2 Qd5-+) 0–1. Darkseid – pieeater, ChessWorld.net, 2012.

6.Nf3 e4 7.Nd4 +=.

7.b5 Ne7 8.Be5 Be5 9.Ne5 0-0 +=.

7.Bb5 a6 8.Be2 (better is 8.Bc6!? bc6 9.Ne5 Be5 10.Be5+=) 8...Qd7 (8...Qe7 9.d4-/+) 9.d4 0-0-0?? (better is 9...ed4 10.Nd4 Be5-/+) 10.de5+- Ne5 11.Be5 Be5 12.Ne5 Qe7 13.f4 (better is 13.Nf3 Ne4+-) 13...Ne4 14.g4?? (14.0-0 f6 15.Bg4 g6+-) 14...Ng3 (14...Qh4 15.Kf1 Qf2) 15.Rg1+- (15.gf5?! Nh1 16.Qd4 Kb8+/–) 15...Qh4 16.gf5 Ne4 17.Kf1 Qh3 18.Rg2= Qe3?? 19.Nf7+- Ng3 20.Ke1 d4 21.Nh8 h6 22.Nf7 Re8 23.Ne5 Qf4 24.Qd3 Qe5 25.Nd2 h5 26.Rg3 h4 27.Rg2 Kb8 28.Rg7! Qh2 29.Nf1 Qh1 30.Qd4 h3 31.Kd2 h2 32.Rh7 Qg2 33.Rh2 Qg5 34.Ne3 Rd8 35.Rh8 Rh8 36.Qh8 Ka7 37.Qd4 b6 38.a4 Kb7 39.Qc4 Qf6 40.Qa6 Kb8 41.Rg1 Qd6 42.Bd3 c6 43.Qb6 Kc8 44.Rg8 Qd8 45.Rd8 1–0. 488 – pieeater, ChessWorld.net, 2012.

7.Bb5 Bd7 8.Bc6+= Bc6 9.Ne5 0-0 (9...Ba4 10.Nc3 Be5 11.Na4 Bb2 12.Nb2+/–) 10.Nc6+/– bc6 11.0-0 Qe7 12.Nc3 (12.Qf3 Nd7+/–) 12...a5+= 13.ba5 Ra5 14.Qe2 (14.Ne2 Rb8 (worse is 14...Ba3 15.Nd4+-) 15.Nd4 Ra6+=) 14...Qe5 (14...Ba3 15.Nb1 Bb4 16.Ra5 Ba5 17.Qa6=) 15.f4+= Qh5 (15...Qe7!?+=) 16.Qh5+/– Nh5 17.Ne2 Re8 (17...Rb8 18.Ra2+/–) 18.g4 Nf6 19.Bf6 gf6 20.Ra2 (20.Nd4 c5 21.Nf5 c4+-) 20...Kg7 (20...Ra3!? 21.Ra3 Ba3+/–) 21.Nd4 c5 (21...c5 22.Nf5 Kg6 23.Nh4 Kg7+-). thedesertfox (1920) – shelob, net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

7.Bb5 Nd7!? =.

7.Bb5 Qe7 8.d4 ed4 9.Nd4 Bd7 +=.

5.Bb5 a5 A) 6.Nf3 Bd7 (6...ab4 7.ab4 Ra1 8.Ba1 Bd7 9.Bf6 ef6 10.c3 Ne5 11.Bd7 Qd7+=) 7.ba5 Na5 8.Bd7 Nd7 9.d3 Nc6 10.0-0 e5 11.Nbd2 Bd6=; B) 6.ba5 Bd7 (6...Ra5 7.Bc6 bc6 8.Nf3 Bg4 9.h3 Bh5 10.g4 Bg6 11.Ne5 Qd6=) 7.Nf3 Na5 8.Bd7 Nd7 9.d3 Nc6 10.0-0 e5 11.Nbd2 Bd6=; C) 6.Bc6 bc6 7.Ne2 ab4 8.ab4 Ra1 9.Ba1 Bd7 10.Nf4 Bf5 11.Bf6 ef6=.

5.Bb5 Qd6 A) 6.Nc3 a6 (6...Bd7 7.Be2 a6 8.Na4 Bf5 9.Nc5 0-0-0 10.Nf3 e5 11.d4 ed4=) 7.Be2 Bf5 8.Nf3 e5 9.0-0 d4 10.Na4 0-0-0 11.b5 ab5=; B) 6.Ne2 Bg4 (6...Bd7 7.c4 e5 8.c5 Qe6 9.d4 e4 10.0-0 a6 11.Nf4 Qf5=) 7.f3 Bd7 8.0-0 a5 9.Ba4 Ne5 10.Be5 Qe5 11.Bd7 Nd7=; C) 6.Nf3 Bg4 (6...0-0-0 7.Be2 Bf5 8.b5 Na5 9.0-0 e6 10.Ne5 Bg6 11.Bd4 Kb8+=) 7.h3 Bd7 8.0-0 a6 9.Bc6 Qc6 10.d3 a5 11.Nbd2 b5+=.

5.Bb5 Bd7 A) 6.Nf3 a5 (6...e6 7.Be2 Bd6 8.b5 Nb8 9.Be5 Be5 10.Ne5 a6 11.ba6 Na6=) 7.ba5 Na5 8.Bd7 Nd7 9.d3 Nc6 10.Nc3 e6 11.0-0 Bc5=; B) 6.Bc6 Bc6 (6...bc6 7.Nf3 e6 8.Bd4 a5 9.c3 Bd6 10.0-0 0-0 11.Ne5 Qe7=) 7.Nf3 a5 8.Nc3 Qd6 9.Ne2 e6 10.Bf6 gf6 11.c3 e5=; C) 6.Be2 a5 (6...e6 7.Nf3 Bd6 8.b5 Na5 9.Ne5 c6 10.a4 a6 11.0-0 0-0=) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 e6 11.Nc3 Rc8=.

5.Bb5 Bg4 A) 6.Bc6 bc6 7.f3 Bd7 8.Ne2 e6 9.0-0 c5 10.Bc3 cb4 11.ab4 Bd6=; B) 6.Ne2 a5 (6...Qd6 7.f3 Bd7 8.0-0 a5 9.Ba4 Ne5 10.Be5 Qe5 11.Bd7 Nd7=) 7.ba5 Bd7 8.a6 ba6 9.Bc6 Bc6 10.Bf6 ef6 11.Nd4 Bd7=; C) 6.Nf3 a5 (6...Qd6 7.h3 Bd7 8.0-0 a6 9.Bc6 Bc6 10.Be5 Qd7 11.Nd4 e6+=) 7.Ba4 e6 8.h3 Bf3 9.Qf3 ab4 10.ab4 Bb4 11.Bf6 gf6=.

5.Be2 Qd6 A) 6.d3 a6 (6...Bf5 7.Nf3 a6 8.Nbd2 Rd8 9.c4 dc4 10.Nc4 Qd7 11.Nfe5 Ne5+=) 7.Nd2 Bf5 8.c4 d4 9.ed4 Nd4 10.Ne4 Ne4 11.de4 Be4=; B) 6.Nf3 Bg4 (6...Bf5 7.b5 Na5 8.Bc3 Nc4 9.d3 Nb6 10.Be5 Qd7 11.Nd4 Bg6+=) 7.b5 Bf3 8.Bf3 Nd8 9.0-0 e5 10.Nc3 Ne6 11.Rb1 0-0-0=; C) 6.Nc3 Bf5 (6...a6 7.Nf3 Bf5 8.b5 ab5 9.Nb5 Qd7 10.Ne5 Ne5 11.Be5 Rc8+=) 7.Nb5 Qd7 8.Nf3 a6 9.Nbd4 Nd4 10.Bd4 g6 11.Ne5 Qa4+=.

5.Be2 Qd7 A) 6.d3 a5 (6...0-0-0 7.Nf3 Bg4 8.0-0 e6 9.Nbd2 h6 10.b5 Na5 11.Ne5 Be2+/–) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 Rc8 11.Nbd2 Bg4=; B) 6.Nc3 d4 (6...0-0-0 7.Nf3 d4 8.ed4 Nd4 9.Nd4 Qd4 10.d3 Bd7 11.Bf3 e5=) 7.ed4 Nd4 8.Nf3 0-0-0 9.Nd4 Qd4 10.d3 Bd7 11.Bf3 e5=; C) 6.Nf3 a6 (6...Bg4 7.0-0 e6 8.b5 Ne7 9.Ne5 Be2 10.Nd7 Bd1 11.Nf6 gf6+=) 7.0-0 Bg4 8.d3 0-0-0 9.Nbd2 Qf5 10.d4 Qg6 11.b5 ab5+=.

5.Be2 Bd7 A) 6.f4 e6 (6...Bf5 7.Nf3 Qd6 8.Bb5 Bd7 9.0-0 a6 10.Be2 Bf5 11.Be5 Qd8+=) 7.Nf3 Bd6 8.0-0 0-0 9.Nc3 a6 10.Qe1 Ne7 11.Ne5 c5=; B) 6.Ra2 a5 (6...e6 7.Nf3 Bd6 8.0-0 0-0 9.b5 Nb8 10.Be5 Qe7 11.Bd6 Qd6=) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 e6 11.Nc3 Rc8=; C) 6.Nf3 e6 (6...Bg4 7.0-0 e6 8.Nc3 Bd6 9.Nb5 e5 10.Nd6 Qd6 11.d3 Bf3=) 7.b5 Na5 8.Ne5 Bd6 9.0-0 c6 10.a4 0-0 11.f4 Qc7=.

5.Be2 Bf5 A) 6.b5 Nb8 (6...Na5 7.Nf3 Nc4 8.Bf6 ef6 9.Nd4 Bc8 10.Bc4 dc4 11.Qe2 Qd5+=) 7.Nf3 a6 8.Nc3 ab5 9.Nb5 Bg4 10.Be5 Na6 11.0-0 e6=; B) 6.Bb5 a5 (6...Qd6 7.Nf3 0-0-0 8.0-0 h6 9.Be2 e6 10.b5 Ne7 11.Be5 Qd7+=) 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Qd6 10.Bc3 Bd7 11.Bc6 Bc6=; C) 6.Nf3 a6 (6...Qd6 7.b5 Na5 8.d3 a6 9.Be5 Qb6 10.ba6 Ra6 11.Nbd2 Nc6+=) 7.0-0 Qd6 8.b5 ab5 9.Bb5 Bg4 10.a4 e6 11.Ba3 Qd7=.

5.Nf3 Qd6 A) 6.Bd3 a6 (6...Bg4 7.h3 Bf3 8.Qf3 a5 9.ba5 e5 10.Bb5 Ra5 11.Bc6 bc6=) 7.0-0 Bg4 8.h3 Bh5 9.c4 dc4 10.Bc4 e5 11.d3 Rd8+=; B) 6.Bb5 Bg4 (6...0-0-0 7.Be2 Bf5 8.b5 Na5 9.0-0 e6 10.Ne5 Bg6 11.Bd4 Kb8+=) 7.h3 Bf3 8.Qf3 a6 9.Ba4 b5 10.Bb3 e5 11.0-0 Rd8=; C) 6.b5 Nd8 (6...Na5 7.Bc3 Nc4 8.d3 Nb6 9.Be2 Bg4 10.Be5 Qd7 11.a4 e6=) 7.Be5 Qd7 8.Nd4 c5 9.Ne6 Qe6 10.d4 Nd7 11.Bf4 Qf6=.

5.Nf3 Bd7 A) 6.Be2 e6 (6...Bg4 7.0-0 e6 8.Nc3 Bd6 9.Nb5 e5 10.Nd6 Qd6 11.d3 a6=) 7.b5 Na5 8.Ne5 Bd6 9.0-0 c6 10.a4 0-0 11.f4 Qc7=; B) 6.b5 Na5 (6...Nb8 7.Nc3 e6 8.Bd3 c5 9.bc6 Nc6 10.Nb5 a6 11.Bf6 gf6=) 7.Ne5 Bf5 8.Bc3 c5 9.bc6 Nc6 10.Bb5 Qb6 11.Qe2 a6=; C) 6.Bd3 e6 (6...Bg4 7.h3 Bh5 8.Bb5 Qd6 9.g4 Bg6 10.Be5 Qd7 11.Bf4 a6+=) 7.b5 Na5 8.Ne5 c5 9.bc6 Nc6 10.0-0 Bd6 11.Nd7 Qd7=.

5.Nf3 Bg4 A) 6.Bb5 a5 (6...Qd6 7.h3 Bf3 8.Qf3 a6 9.Bc6 Qc6 10.Bf6 gf6 11.Nc3 Rd8+=) 7.ba5 Ra5 8.Bc6 bc6 9.0-0 e6 10.d3 Bd6 11.h3 Bh5=; B) 6.Bd3 e6 (6...e5 7.b5 e4 8.bc6 bc6 9.Be2 ef3 10.Bf3 Bf5 11.Bd4 Be7=) 7.b5 Na5 8.Bc3 c5 9.bc6 Nc6 10.h3 Bh5 11.Ra2 Rb8+=; C) 6.h3 Bd7 (6...Bh5 7.Bb5 Qd6 8.g4 Bg6 9.Be5 Qd7 10.Bf4 a6 11.Ne5 Qe6+=) 7.Be2 e6 8.b5 Na5 9.Ne5 Bd6 10.0-0 0-0 11.f4 Ne4=.

6.b5 ab5 (6...Nb8 7.Ne5 ab5 8.Bb5 c6 9.Be2 Bf5 10.0-0 e6 11.Nf3 Bd6=) 7.Bb5 Bd7 8.Nc3 e6 9.0-0 Bd6 10.a4 0-0 11.Be2 e5 =.

6.Bd3 Qd6 (6...Bg4 7.Be2 e6 8.0-0 Bd6 9.d3 e5 10.c4 dc4 11.dc4 e4=) 7.0-0 Bg4 8.h3 Bh5 9.b5 Bf3 10.Qf3 Ne5 11.Qe2 Nd3 =.

6.Be2 Qd6 7.0-0 Bf5 8.Nh4 Bd7 9.f4 g6 10.Nf3 Bf5 11.Be5 Qd8 +=.

6.Be2 Bf5 7.0-0 Qd6 8.b5 ab5 9.Bb5 Bg4 10.h3 Bh5 11.a4 e6 =.

6.Be2 g6 7.Bf6 ef6 8.d4 Bd6 9.Nbd2 b5 10.Nb3 0-0 11.h4 h5 12.c3 f5 13.g3 Re8 14.Nc5 Qb8 15.0-0 Qb6 16.a4 Ne7 17.ab5 ab5 18.Qb3 Ra1 19.Ra1 c6 20.Qa3 Qb8 21.Kg2 Qc8 22.Qa6 Qa6 23.Ra6 Bc5 24.bc5 Kf8 25.Ne5 Rc8 26.f4 f6 27.Nd3 Rd8 28.Nb4 Bd7 29.Kf2 Kg7 30.Bd1 Kg8 31.Bb3 Kf7 32.Ra7 Kf8 33.Kf3 Nc8 34.Ra8 Re8 35.Kf2 Rd8 36.Ra6 Ne7 37.Ke2 Kg8 38.Kd2 Kf7 39.Ra7 Ke8 40.Bc2 Nc8 ½–½. orangutandu – naojp, internet, 2013.

6.Bf6 ef6 7.d4 Bd6 8.Bd3 0-0 9.0-0 Re8 10.Nbd2 a5 11.b5 Na7 =.

6.Bf6 gf6 7.Be2 (7.d4 Rg8 8.Rg1 Bg4 9.h3 Bf5 10.c4 dc4 11.Bc4 e6+=) 7...Bg7 (7...Rg8 8.Rg1 Bf5 9.d4 e5 10.c4 ed4 11.cd5 Qd5=) 8.0-0 (8.d4 Bf5 9.c4 dc4 10.Bc4 e5 11.Nc3 ed4+=) 8...f5 (8...Rg8 9.d4 Bg4 10.h3 Bf5 11.Nh4 Bd7+=) 9.c3 (9.d4 Rg8 10.Bd3 Qd6 11.Nbd2 0-0-0+=) 9...Qd6 (9...f4 10.ef4 Qd6 11.b5 ab5=) 10.Ng5 (10.d4 f4 11.Nbd2 Bf5=) 10...Ne5 (10...Rg8 11.d4 Bd7=) 11.d4 (11.Ne6 Qe6=) 11...Ng6 (11...Ng4=) 12.Ne6 Qe6 13.Nd2 f4 14.ef4 Nf4 15.Re1 0-0-0?? (better is 15...Qg6 16.g3 Ne2 17.Qe2 e6=) 16.Bg4+- Qg4 1–0. mckenna215 (1985) – diggerdogwoofwoof (1655), ChessWorld.net, 2011.

5.c4 dc4 6.Bc4 e6 7.d4 (7.Nf3 a6=) 7...Ne7 (7...Bd6 8.Nf3=) 8.Bd3 Bd3 9.Qd3 Ned5 (9...a5 10.b5=) 10.Ne2 (10.Qb5 Nd7 11.Qb7 a5+=) 10...Bd6 (10...a5 11.b5=) 11.Nbc3 (11.e4 Nf4 12.Nf4 Bf4+=) 11...0-0 12.0-0 a6 13.e4 Nc3 14.Nc3 Nd7 15.e5 Be7 16.Ne4 (16.f4 a5+=) 16...Bg5 (better is 16...Ne5!? 17.Qc3 Ng6=+) 17.Qg3 Bh6 18.Bc1 Bc1 19.Rac1 a5 20.b5 c6? (better is 20...Nb6+/–) 21.bc6+- bc6 22.Nd6 (22.Rc6 Nb6 23.Rd6 Qc7+-) 22...Rb8 23.Rc6 Rb2 (23...Nb6 24.f4+-) 24.Rfc1 (24.f4 Nb6+-) 24...Qa8 (24...a4 25.Rc8 Qe7 26.R8c7+-) 25.R6c2 (better is 25.Qc3 Rfb8 26.Rc7+-) 25...Qd5?? (better is 25...Rc2 26.Rc2 Qd5+-) 26.Rb2+- Qd4 27.Rbc2 (27.Re2 f6 28.ef6 Rf6+-) 27...h6 (27...Ne5 28.Nb5 Qe4 29.Rc5+-) 28.Rc4 (better is 28.Re1!? Rd8 29.Rcc1 a4+-) 28...Qe5 29.Ne4 (better is 29.Rc7 Qg3 30.hg3+-) 29...Rc8 (29...Qg3 30.hg3 Nb6+-) 30.Rc8 Nf8 31.R1c5 Qd4?? 32.h3 Kh7 33.Rf8 Qc5 34.Nc5 g5 35.Ne6! (35...Kg6 36.Qf3 f6 37.Qf6 Kh5 38.g4 Kh4 39.Qh6) 1–0. slavisa3 – CharliecChess1, Live Game Caissa's Web, 2004.

5.c4 e5 6.Nf3 (6.b5 Na5=) 6...e4=+ 7.Nd4 Nd4 8.Bd4 a5 9.b5 Be7 10.Be2 (10.d3 0-0=) 10...dc4 (10...0-0 11.0-0=) 11.Bc4 0-0 (11...c6 12.bc6 bc6 13.0-0=) 12.Qc2 (12.0-0 c5 13.bc6 bc6=) 12...Bd6 (12...Rc8 13.Nc3=) 13.h3 (13.f3 Qe7=) 13...Qe7 (13...c5 14.bc6 bc6 15.Nc3=+) 14.f4 (14.Nc3 Be5=+ (worse 14...Ba3 15.Bf6 gf6 16.g4+=)) 14...Nh5 (14...Rfc8=+) 15.Kd1 (15.0-0!? Ng3 16.Rf2=+) 15...Ng3-/+ 16.Rg1 Rfc8 (16...Be6 17.Be6 Qe6 18.Qa2-/+) 17.Qa2 (17.Qb2 Qf8=+) 17...Bg6-/+ 18.Nc3 Bh5 (18...c6 19.Na4 Bh5 20.Ke1 cb5 21.Bb5-/+) 19.Kc2 (19.Ke1 Nf5 20.g4 Nd4 21.ed4 c5 22.bc6 Rc6+-) 19...c5 (19...c6 20.b6-/+) 20.bc6 (20.Nd5 Qh4 21.Bc3 Rd8=+) 20...bc6 (20...Rc6 21.Bd5 Rc7 22.Kb2-+) 21.Na4 (21.Bb6 Rcb8 22.Rgb1 Rb7-/+) 21...Bc7 (21...Rcb8 22.Bb6-+) 22.Rab1 (22.Nb6 Bb6 23.Bb6 Rcb8-/+) 22...Ne2 (22...Rab8 23.Rb8 Rb8 24.Rb1 Rb1 25.Bc5-/+) 23.Bc5 (23.Rgf1 c5 24.Bg7 Kg7=) 23...Qd7 24.g4 Bg6?? (better 24...Ng1 25.Rg1 Bg6=) 25.Be2+- Rd8 26.Kc1 1–0. jaddwarrior (1980) – harn (1925), ChessWorld.net, 2015.

5.d4 e6 6.c4 dc4 7.Bc4 Bd6 8.Nf3 0-0 9.Nc3 Qd7 10.Nh4 Be4 11.Ne4 Ne4 12.Bd3 Nf6 13.0-0 e5? (13...a6 14.Qc2+=) 14.d5?? (Better is 14.b5 Nd4 15.ed4+-) 14...Ne7 (14...Nd5 15.Nf3=) 15.e4+= Ng6 16.Ng6 fg6 17.f3 a5 18.Qd2 ab4 19.ab4 b6 20.Ra8 Ra8 21.Ra1 Ra1 22.Ba1 Qa4 23.b5?? Qa1 24.Kf2 Qa3 25.Qc2 Qb4 26.Be2 Qc5 27.Kg3 Qc2 0–1. slavisa3 – Charliechess1, Live Game Caissa's Web, 2004.

5.d4 e6 6.c4 Be7 7.Nf3 0-0 8.Nc3 Re8 9.c5 Ne4 10.Bd3 Bf6 11.0-0 Qd7 12.Be4 de4 13.Nd2 e5 14.Nde4 Kh8? (Better is 14...ed4!? 15.Nf6 gf6+/–) 15.Nf6+- gf6 16.d5 Ne7 17.e4 Bg6 18.f4 Ng8? (18...f5+-) 19.f5 Bh5 (19...Rad8 20.Qf3+-) 20.Qh5 Rf8 21.Rf3 Ne7 (21...Rfd8 22.Rd1+-) 22.Rh3 1–0. Loulou – adamant, HCL–B1732 playchess.de, 2003.

5.d4 e6 6.Bd3 Bg4 7.Nf3 Bd6 8.h3 Bh5 9.Nbd2 Ne7 10.c4 dc4 11.Nc4 0-0 12.0-0 Ned5? (12...Bg6 13.Rc1=) 13.Nd6 (better is 13.e4+-) 13...Qd6 14.Be2 Bg6 15.Ne5 Bf5 16.g4 Bg6 17.Bd3 Ne4 (17...Bd3 18.Qd3 Nb6 19.Rad1=) 18.Qc2 (18.Ng6 Nf2 19.Rf2 (19.Kf2 fg6 20.Ke1 Ne3-+) 19...fg6 20.Qe1 Qg3 21.Rg2 Qh3 22.Bc1+/–) 18...f6?? (better is 18...Ng5 19.Bg6 fg6=) 19.Nc4 (better is 19.Ng6 Ne3 20.fe3 Qg3 21.Qg2 Qe3 22.Kh2 Qd3 23.Nf8 Rf8 24.Rae1+-) 19...f5?? (better is 19...Qc6 20.Be4 Be4 21.Qe4 Qc4 22.Qe6 Kh8+/–) 20.Nd6+- cd6 21.Be4 (better is 21.gf5!? ef5 22.Rac1 Rfe8+-) 21...fe4 22.Rac1 Rf3 23.Qe2 Rh3 24.Kg2 (better is 24.Qb5!? Nb6 25.Rc7 d5+-) 24...Rh4 (24...Rf3 25.Qb5 Rf7 26.Rc2+-) 25.Rh1 (25.Rh1 Rh1 26.Rh1+-) 1–0. Fournier,Frederic (1935) – lapin (1955), Echecs21, 2003.

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nc6).

5.Be2 Be2 6.Ne2 e5 7.b5 Na5 8.Be5 Nc4 9.Bd4 Ne4? 10.d3+- c5 11.bc6 bc6 12.dc4 c5 13.Be5 Qa5 14.c3 f6 15.Qd5 Rd8 16.Qe4 fe5 17.Qe5 Be7 18.Qg7 Kd7 19.Nf4 Rdg8 20.Qf7 Rf8 21.Qd5 Bd6 22.Nd2 Qc3 23.Qb7 Bc7 24.Qc7! Kc7 25.Nd5 Kc6 26.Nc3 Rf5 27.Nde4 Rhf8 28.Rd1 Rf2. Trkn – guest7272, ICC, 2004.

5.Be2 Bf5 6.Nf3 e6 7.c4 Ng4 8.d4 Bb1 9.Rb1 Qb8 10.cd5 ed5 11.Bb5 Qd8 (11...a6 12.Bc6 bc6 13.0-0+/–) 12.h3 Qh4?? (better is 12...Nf6 13.Ne5 a6 14.Nc6 Qd6+-) 13.Nh4 0-0-0 14.hg4 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

5.a3 Nc2 6.Qc2 Bd7 7.Bf6 (7.Nf3 c6+-) 7...ef6 8.Nc3 g6?! (8...Be6+-) 9.Nd5 Bf5 10.Nc7 Kd7 11.e4 Be4 12.Qe4 Qc7 13.Be2 (13.Ne2 Qb6+-) 13...Re8 (13...Ba3 14.b6 (14.Ra3?! Qc1 15.Bd1 Rhe8 16.Rd3 Kc7+/–) 14...ab6 15.Bb5 Kd8 16.Ne2+-) 14.Qd4 Kc8 (14...Bd6 15.Qf6 Re7 16.Qh8+-) 15.Qa7 Qe5 (15...Bc5 16.Qa4 Kd8+-) 16.Rc1 Kd7 17.Qb7 Kd8 (17...Ke6 18.Rc3 Bc5 19.Qc6 Qd6 20.Rc5 Qc6 21.Rc6 Ke7 22.Rc7 Ke6+-) 18.Rc8 1–0. Caissa – Checker, Live Game Caissa's Web, 2006.

5.a3 Nc2 6.Qc2 e5 7.Be5 g6 8.Bc7 Qe7 9.Nf3 (9.b6!? ab6 10.Bb6 Bg7+-) 9...Bf5 10.d3 b6 (10...Rc8 11.b6 ab6 12.Qa4 Qd7 13.Qd7 Nd7 14.Bf4 Bd3 15.Nbd2+- (worse 15.Bd3 Rc1 16.Kd2 Rh1+-)) 11.Be5 (better 11.Qc6 Qd7 12.Qa8 Qc8 13.Qa7 Bg7+-) 11...Bh6 (11...Rc8 12.Nc3 Bg7+-) 12.Qc6 Nd7 13.Qa8 Qd8 14.Qd8 Kd8 15.Bh8 Nc5 16.Ne5 Nb3 17.Nf7 Ke8 18.Nh6 1–0. GuestMNLQ – GuestQJVC, freechess.org, 2017.

5.a3 Nc2 6.Qc2 Bf5 7.Qf5 e6 8.Qc2 Bd6 9.Nf3 0-0 10.Be2 Ne4 (10...a6 11.Nc3+-) 11.Bd3 (better 11.Nc3 Nc3 12.Bc3+-) 11...Qf6 (11...f5+-) 12.Be4 (12.Bf6 Nf6 13.Nc3 e5+-) 12...de4 13.Bf6 gf6 14.Qe4 f5 15.Qh4 Kh8 16.Ng5 (better 16.Qf6 Kg8 17.Ng5+-) 16...h6 17.Qh6 Kg8 18.Qh7 1–0. Fettito – Dream3016, lichess.org, 2018.

5.a3 d4 6.ab4 de3 7.fe3 Qd5 8.Nc3 Bg4 (8...Qd6+-) 9.Nd5 Bd1 10.Nc7 Kd8 11.Na8 (11.Na8 Bc2 12.Ra7+-) 1–0. GuestYRTR – GuestZQJD, freechess.org, 2019.

5.a3 d4 6.ab4 de3 7.fe3 e5 8.Be5 Bb4 9.Nf3+-.

5.a3 d4 6.ab4 de3 7.fe3 Bg4 8.Be2 Be2 9.Ne2 (9.Ke2?! Qd5 10.Kf2 Ne4 11.Ke1 Qb5+-) 9...e6 10.0-0 Bb4 11.Bf6 gf6 12.Ra4 Bd6 13.Nec3 (13.Nbc3 Rf8+-) 13...f5 14.Qf3 Qe7 (14...Qb8 15.e4+-) 15.Qb7 0-0 16.Ra7 Qh4 17.h3 (17.Qa8?? Bh2 18.Kh1 Bg3 19.Kg1 Qh2) 17...Qg3 (17...Ra7 18.Qa7 Qg3+-) 18.Ra8 Qh2 19.Kf2 Bg3 20.Ke2 Bd6 21.d4 h5 (21...Ra8 22.Qa8 Kg7 23.Qf3+-) 22.Rf8 Kf8 23.Nd2 Kg7 (23...h4 24.Ra1 Kg7 25.Ra8+-) 24.Nc4 e5 (24...h4+-) 25.Nd6 cd6 26.Rf5 ed4 (26...Kh6 27.Rf6 Kg5 28.Qe7 Qg2 29.Rf2 Kh6 30.Rg2 Kh7 31.Qf7 Kh6 32.Rg6) 27.Qf7 Kh6 (27...Kh8 28.Rh5) 28.Rh5 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.a3 Qd6 6.ab4 Qb4 7.Ba3 Qa5 8.Nf3 e6 9.Bb2 Qb6 10.Bd3 Bc5 (10...c5 11.Bf6 gf6 12.c4+-) 11.0-0 Ne4 (11...c6 12.Bf6 gf6 13.bc6 bc6 14.Be2+-) 12.Bg7 Rg8 13.Bd4 Bd7 14.Nc3 (14.c4 h6+-) 14...Bd4 15.ed4 Nc3 16.dc3 Bb5 17.Ne5 Bd3 18.Qd3 h5 (18...a5 19.Rfb1 Qa6 20.Qa6 ba6 21.Ra5+-) 19.Rfb1 (19.Rfb1 Qd6 20.Rb7+-) 1–0. DEFFM – GuestYFPL, freechess.org, 2018.

5.a3 Qd7 6.ab4 e5 (6...Qd6 7.Nf3+-) 7.Be5 Bb4 8.Nc3 0-0 (8...c6 9.Bf6 gf6 10.Ra4 Bc3 11.dc3 cb5 12.Qb1+-) 9.Bf6 gf6 10.Bd3 f5 11.Nge2 d4 (11...a6 12.Ra4 Bc3 13.Nc3+-) 12.Nd4 Bc3 13.dc3 Qd5 14.0-0 Kh8 15.Qh5 (15.c4 Qe5+-) 15...Rg8 16.e4! Qc5 (16...fe4 17.Qd5 Double attack (17.Qd5 Pinning; 17.Qd5 Deflection; 17.Qd5 Decoy)) 17.ef5 Qd5 18.g3 c5 19.bc6! bc6 20.Qh6 c5 (20...Qd7+-) 21.f6 Rg6 22.Bg6 fg6 (22...Qg2 23.Kg2 Bb7 24.Kg1 cd4 25.Qh7) 23.Qg7 1–0. Guest – GuestDreu, internet, 2020.

5.a3+- Bg4 6.f3 Nc2 7.Qc2 Be6 8.Ne2 a6 (8...Bd7 9.Bf6 ef6 10.Nd4+-) 9.a4 (better is 9.ba6!? ba6 10.Nf4 Bc8 11.Bf6 ef6 12.Qc6 Bd7 13.Qd5 Be7+-) 9...ab5 10.ab5 Ra1 11.Ba1 g6 (11...Bd7 12.Nf4+-) 12.Be5 Bf5 13.d3 Qd7 (13...Bg7 14.e4 de4 15.de4+-) 14.Nd4 (14.g4!? Bg4 15.fg4 Bh6+-) 14...Kd8 (14...Bg7 15.g4 Be6 16.Nd2+- (16.Ne6?! Qe6 17.d4 0-0+-)) 15.Nf5 (better is 15.g4!? Bh6 16.gf5 Be3+-) 15...gf5 16.Bf6 ef6 17.d4 Bb4 18.Kf2 Qe6 19.f4 Re8 20.Qd3 Qe4 21.Qe4 (better is 21.Be2 Rg8 22.Rg1 Re8+-) 21...Re4? (21...fe4 22.Be2 Kd7+-) 22.Bd3 Re8 23.Bf5 h5 24.Rc1 h4 25.Nc3 c6 26.bc6 bc6 27.Rc2 (27.e4!? Bd6 28.Kf3 Ba3+-) 27...Bc3 28.Rc3 Kc7 29.g3 Rh8 30.Kg2 Rg8 (30...hg3 31.Kg3 Rg8 32.Kf3+-) 31.g4 Ra8 32.Kh3 Ra2 33.Rc2 Rc2 (33...Ra3 34.Re2+-) 34.Bc2 Kb6 (34...Kd6 35.Bb3+-) 35.Kh4 (35.Bb3 c5 36.Bd5 f5 37.Kh4 fg4 38.Kg4 cd4 39.ed4 f6+-) 35...c5 36.dc5 Kc6 37.g5 (37...Kc5 38.gf6+-) 1–0. hal1958 – The_Kasparov, playchess.de, 2002.

5.Be5 e6 6.c4 dc4 7.Bc4 Ne4 (7...Nd7 8.Bc3+-) 8.d3 (8.Nh3 Nd6 9.Qb3 Bd7+-) 8...Nf6 (8...Qg5 9.Nf3 Qg2 10.Rf1+- (10.de4?! Qh1 11.Ke2 Qd1 12.Kd1 Bd7+/–)) 9.Nf3 Bb4 10.Bc3 Bc3 11.Nc3 Nd5 (11...0-0 12.d4+-) 12.Qb3 Nc3 13.Qc3 0-0 14.0-0 c6 (14...a6 15.a4+-) 15.a4 (15.bc6 bc6 16.d4 Qd6+-) 15...cb5 16.Bb5 a6 17.Bc4 b5 18.ab5 Bd7 19.ba6 Bc6 20.Ne5 Qb6 21.Rfb1 Qc5 22.d4 f6 23.Be6 (23...Kh8 24.Qc5 Bg2 25.Nf7 Rf7 26.Bf7+-) 1–0. wlittle (2245) – johansson, net–chess.com, 2004.

5.Be5 Bf5 6.Nf3 Ne4 7.Bd3 f6 8.Bb2 e5 9.Be2 Qd6 10.0-0 0-0-0 (10...Qe6 11.d4 Bd6 12.c4 dc4 13.Qa4 ed4 14.Bd4+- (14.Qc4?! Qc4 15.Bc4 de3+-)) 11.Ne1 (11.d4 ed4 12.Nd4 Bg6+-) 11...g5 (11...Qb4 12.Ba3 Qa4 13.Bf8 Rhf8 14.f3+-) 12.Bg4 (12.d4 Qe6+-) 12...Bd7 (12...Bg4 13.Qg4 Qd7 14.Qd7 Kd7 15.d4 ed4 16.Bd4+-) 13.f3 (13.d4!? Bg7+-) 13...Bg4 14.fg4 Bh6 (14...Qb4 15.Bc1+-) 15.a4 Bg7 16.a5 (16.d3 Nc5+-) 16...h5 (16...Qb4 17.Ba3 Qb5 18.d3+-) 17.b6 (17.d3 Qb4 18.Ba3 Qb5 19.de4 de4+-) 17...a6 (17...cb6 18.gh5 b5 19.d3+-) 18.bc7 Kc7 19.Ba3 (19.d3 Nc5 20.gh5 Qc6+-) 19...Qe6 20.h3 (better 20.d3 Nd6 21.gh5+-) 20...hg4 21.Qg4 (worse 21.hg4 Ng3 22.Kf2 Nf1 23.Kf1 Rh1 24.Kf2 e4=) 21...f5? (better 21...Qg4 22.hg4 Rh4+-) 22.Qd1 (better 22.Qf5 Rh6 23.c3+-) 22...g4= 23.c4 gh3 (23...dc4 24.Bb4 Combination) 24.cd5?? (24.Qf3 h2 25.Kh1-+) 24...Qd5 (24...h2 25.Kh1 Ng3) 25.Nc3?? (better 25.Qf3+=) 25...Nc3 (25...h2 26.Kh1 Ng3) 26.Rc1 (26.Qc1 Qd2 27.Bb2-/+) 26...hg2?? (better 26...e4 27.Qe2 Qa2-+ (27...Qa5?! 28.Bb2=)) 27.Rf3?? (better 27.Rc3 Kb8 28.Ng2 Qa5 29.Qc2+-) 27...Bf6 (better 27...e4 28.Rf4 Qc6-+) 28.Rc3-/+ Kb8 29.Rd3?? (better 29.Ng2 e4 30.Rc5-/+) 29...Qd3 (29...Rh1 30.Kg2 Rdh8 31.Bd6 Ka8 32.Be5 Qg8 33.Kf2 Qg1 34.Ke2 R8h2 35.Bh2 Rh2 36.Ng2 Rg2 37.Rf2 Qf2) 30.Nd3-+ Rh1 31.Kg2 Rd1 32.Rf5 (32.Nf2 Rg8 33.Rg3 Rg3 34.Kg3 Rd2-+) 32...Rd2 (better 32...Rd3 33.Bb4 Bh4 34.Kf3 Rf1 35.Ke4 Rf5 36.Kd3-+) 33.Nf2 Bh4 34.Bc5 Rf2 (34...Ra2 35.Bb6 Rg8 36.Kf1 Bf2 37.Rf2 Ra1 38.Ke2-+) 35.Rf2 Bf2 36.Kf2 Kc7 (36...Rd5 37.Bb6-+) 37.Bb6 Kc8 38.Bd8 Kd8 39.Kf3 Kd7 40.Ke4 Kc6 (better 40...Ke6 41.Kd3 Kd5-+) 41.Ke5-/+ Kb5 42.Kd6 (42.e4 Ka5 43.Kd5 Kb6-/+) 42...Ka5 43.Kc7 (43.e4!? b5 44.e5-/+) 43...b5-+ 44.e4 b4 45.e5 b3 46.e6 b2 47.e7 b1Q 48.e8Q Qb6 49.Kc8 Qc5 50.Kd8 Qd6 51.Kc8 Kb4?? (51...Kb6!? 52.Qf7 Qc6 53.Kb8-+) 52.Qe4 (52.Qe1 Ka4 53.Qa1 Kb5 54.Qf1 Kc5 55.Qc1 Kb6 56.Qb1 Kc6 57.Qb6 Kd5=) 52...Kc5 (better 52...Ka3!?-/+) 53.Qc2= Kb4 54.Qb2 Ka4 55.Qc2 Ka3 56.Qc1 Kb3 57.Qb1 Kc3 58.Qa1 Kc2 59.Qa2 Kc1 60.Qa1 Kc2 61.Qa2 Kd3 62.Qb1 (62.Kb7 Ke3=) 62...Kc4 (62...Ke2 63.Qa2 Kf3 64.Kb7=) 63.Qa2 Kb5 (better 63...Kd4 64.Qd2 Ke5 65.Qh2 Ke6 66.Qh3 Kf6 67.Qh6 Ke7 68.Qh7 Kf8 69.Qh8 Kf7 70.Qh7 Ke8 71.Qh5 Ke7 72.Qh7 Ke6 73.Qh3 Kd5 74.Qg2 Kd4 75.Qd2 Ke5 76.Qh2 Kd5 77.Qg2 Kd4 78.Qd2=) 64.Qb3?? (better 64.Qe2 Kb6 65.Qa6 Ka6=) 64...Qb4-+ 65.Qd5?? (better 65.Qf3-+) 65…Qc5 (65...Qc5 66.Qc5 Kc5-+) 0–1. Akrapovik – OsamaMo (1630), lichess.org, 2020.

5.a3 Ne4 6.d3+/– a6? (better is 6...Nf6+/–) 7.Bc6+- (7.de4?! ab5 8.ed5 Ne7 9.Be5 Nd5+/–) 7...bc6 8.de4 Bd6 9.Nf3 (better is 9.c4!? dc4 10.Nf3 f6+-) 9...de4 10.Nfd2 a5 11.Ne4 ab4 12.g3 (better is 12.Nd6!? cd6 13.ab4 Ra1 14.Ba1 0-0+-) 12...ba3 13.Na3 Bb4 14.c3 (14.Ke2 Qd5 15.f3 f5+-) 14...Be7 (14...Qd1 15.Kd1 Ba3 16.Kc2+- (16.Ra3?! Bg4 17.Kc2 Ra3 18.Ba3 Bf3 19.Nf6 gf6+=; worse is 16.Ba3 Bg4 17.Kd2 Bf3+=)) 15.Qb3 (better is 15.Qd8!? Kd8 16.h4+-) 15...Qd5+/– 16.Qd5 cd5 17.Nd2 e4? (17...Rb8!? 18.0-0-0 c6+/–) 18.Nb5 (18.c4 Be6+-) 18...Rb8 19.Nc7 Kd8 20.Nd5 Bc5?? (better is 20...Rb2 21.Nc4 Rb7+-) 21.Ne4 (better is 21.0-0-0 f5+-) 21...Bf8 (21...Rb2 22.Nb4 Rb4 23.cb4 Bb4 24.Ke2 f5 25.Rhd1 Kc7+-) 22.Rb1 (22.0-0-0 Bg4 23.Rd4 Bf3+-) 22...Bf5 23.f3 h5 24.0-0 Rb5 25.c4 Rb3 26.Bd4 Rd3 27.Bb6 Kc8 28.Rfd1 Ra3 29.c5 Kb7 30.Bc7 Kc6 31.Rb6 Kd7 32.Nb4 Kc7+- 33.Nd5 Kd7 34.Ndc3 Ke8 35.Nd6 Bd6 36.Rbd6 Rc3 37.Rd8 Ke7 38.Rh8 Rc5 39.Rhd8 Bc2 40.R1d7 Ke6 41.Rb7 Be4 42.fe4 Ke5 43.Re7 Kf6 44.Red7 Re5 45.Kf2 Re4 46.Kf3 Rc4 47.Rd6 Kg5 48.Rd5 f5 49.Rg8 Kf6 50.Rf8 Kg6 51.Rff5 Rg4 52.Rh5 Kf7 53.Kg4 g6 54.Rh7 Ke6 55.Rhd7 Kf6 56.e4 Ke6 57.Ra7 Kf6 58.Ra6 Kg7 59.Kg5 Kf7 60.Rg6 Ke7 61.h4 Kf7 62.h5 Ke7 63.h6 Kf7 64.Rd7 Ke8 65.Rgg7 Kf8 66.e5 Ke8 67.e6 1–0. Willi_weizenkeim – LADY, playchess.de, 2002.

5.Be5 Bb4 6.Nc3 =.

5.Nf3 Bd6 6.Ne5+/– Be5 7.Be5 Bd7 8.Bc6 Bc6 9.0-0 0-0 10.Nc3 a6 11.d4 Bd7 12.Qf3 Ne4 13.Ne4 de4 14.Qe4 Bc6 15.Qf4 Qe8 16.Bc7 Qe6 17.Rfd1 (17...Bd5 18.Be5+-) 1–0. Wall,Bill – Landrio,Bruno, Internet, 2006.

5.Nf3 Bd7!? =.

4.a3 c5 5.Nc3 cb4 (5...Nc6!?=) 6.Nb5+- Qb6 (better 6...Qd7!? 7.ab4 Nc6+-) 7.Be5+- Na6 8.ab4 Bd7?? (better 8...Ng4 9.Ra6! ba6 10.Nc7 Kd8 11.Na8 Qc6 12.Bc7 Ke8+-) 9.Ra6! ba6 (9...Qa6 10.Nc7 Double attack (10.Nc7 Decoy); 9...ba6 10.Nc7 Double attack) 10.Nc7 Kd8 11.Na8 Qb4 12.Nc7 e6 13.Na6 (13.Ba6?! Bd6 14.Ne6 Be6+-) 13...Qa3 14.Nf3 (14.Qb1 Bd6 15.Nf3 Ke7+-) 14...Bd6 (14...Ne4 15.Bc7 Ke8 16.Ne5+-) 15.Bd3 Ke7 16.0-0 Rc8 (16...Bc8 17.Qe2 Be5 18.Ne5+-) 17.Qe2 Rc6 (17...Be5 18.Ne5 Ba4 19.c3+-) 18.Ra1 Qb2 (18...Ra6 19.Ba6 Qb4 20.Bd6 Qd6+-) 19.Bb2 1–0. Pierre – Bel Mondo, internet, 2020.

4.a3 Nc6 5.Nf3 Ne5?? (better is 5...Bg4=) 6.Be5+- Qb6 7.Bd4 Qc6 8.Be2 e6 9.0-0 Bd6 10.d3 (10.Nc3 a6+-) 10...0-0 11.Bf6 gf6 12.Nbd2 e5 13.c4 e4 (13...Rd8 14.cd5 Qd5 15.Qc2+-) 14.de4 (14.cd5!? Qd5 15.Ne4 Be7+-) 14...de4 15.Nd4 Qd7 (15...Qe8 16.c5 Be5 17.Ne4 Bh2 18.Kh2 Qe4 19.Rh1+-) 16.Ne4 Kh8 17.Nd6 cd6 (17...Qd6 18.Bd3+-) 18.Nf3 (18.Nb5!? Rd8+-) 18...Rg8 19.g3 Qe6 20.Nd4 Qd7 (20...Qe7 21.Qd3+-) 21.Bf3 Qe7 22.Bg2 Rb8 (22...Be6 23.Qd3+-) 23.Rc1 b6 (23...Bg4 24.Qd3+-) 24.Qc2 (better is 24.Nc6 Qc7 25.Nb8 Qb8+-) 24...Bb7 25.Nc6 Bc6 26.Bc6 Rbc8 27.Bd5 Qe5 28.Qe4 f5 29.Qe5 de5 30.Bf7 Rg7 31.Be6 f4 (31...Rf8+-) 32.Bc8 fg3 33.fg3 1–0. Fournier,Frederic (1955) – sucusucu, Active, 2011.

4.a3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.e3 Nf6).

4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 e5 8.Nf3 e4 9.Nd4 Be7 10.c4 0-0 11.cd5 Nd5 (11...Qd5 12.Nc3 Qe5 13.d3=) 12.Nc3 (12.d3 Qg6=) 12...Nc3 13.Bc3 Bf6 (13...c5 14.Ne2=+) 14.Qc2= Re8 15.Be2 (15.Bc4 Nd7=) 15...Bd7 (15...c6 16.bc6 Nc6 17.Nb5=) 16.0-0 c5 (16...Be5 17.f4 Bf6 18.Nb3=) 17.bc6 Nc6 (17...bc6 18.Nb3=) 18.Nb5 Qc5 19.Rc1 (19.Qb1 Be5=) 19...Nb4 20.Qb2 (better 20.Bb4 Qb4 21.Rb1=) 20...Bc3 (20...Rc8 21.Nd4=) 21.Rc3 (21.Nc3 Qf8+-) 21...Qe7 (21...Qf8 22.Rb3 Nc6 23.Nc3+=) 22.Rc7+- Nd3 (22...Na6 23.Rb7 Nc5 24.Rc7+-) 23.Qd4 Rd8 24.Rb7 (24.Nc3 Ne5+-) 24...Qh4 (better 24...Nc5!? 25.Ra7 Qf8+-) 25.g3+- (25.Bd3?! Bc6 26.g3 Rd4 27.gh4 Bb7 28.Nd4 ed3+=) 25...Qh3 26.Bd3 (26.Qe4?! Nc5 27.Rd7 Qd7= (27...Ne4?? 28.Rd8; 27...Nd7?? 28.Bg4 Qh6 29.Bd7+-)) 26...ed3 27.Qb6 (27.Qd3 Qg4+-) 27...Rc8 (27...Rf8!?+-) 28.Rb8+- h5 (28...Be8 29.Qc7 Rb8 30.Qb8+-) 29.Rc8 Bc8 30.Qd4 (30.Qd8 Kh7 31.Qd3 Kg8+-) 30...Kh7 (30...Qd7 31.Nd6 Ba6+-) 31.Qd3 g6 (31...Kg8 32.Nd6 Qg4 33.f3+-) 32.Nd6 Be6 33.Ne4 (33.e4 Qg4+-) 33...Qf5 34.Qd4 (34.f4 Kg7+-) 34...Qb5 (34...g5 35.f4 gf4 36.ef4+- (36.gf4?! Qg4 37.Ng3 h4 38.Qe4 Kg7+-)) 35.h4 Qb1 36.Kh2 Qf1 37.Ng5 Kg8 38.Qd8 (38.Qf6 Bc4+-) 38...Kg7 39.Ne6 fe6 40.Qe7 Kh6 41.Qf8 Kh7 42.e4 (42.Qf7 Kh6+-) 42…Qd3 1–0. Hanscombe,Richard (1755) – Evans,Paul A (1955), British Chess Championships: Week, 2015.

4.b5 Bd7 5.a4 c5 (5...e5 6.Nf3 e4 7.Nd4=) 6.c4 (6.Nf3 Bg4=) 6...d4 (6...e5 7.cd5 Qd5 8.Nf3=) 7.Nf3 (7.ed4 cd4 8.Nf3 Bg4+=) 7...de3 (7...e5 8.ed4 ed4 9.Bd3=+) 8.fe3= g6 (8...Bf5!?=) 9.Be5+- Qe6 (9...Qb6 10.Nc3 Bg7 11.Nd5 Nd5 12.Bg7+- (12.cd5?! Be5 13.Ne5 Qd6=)) 10.Nc3 Bg7? (better 10...Rg8+-) 11.Nd5!+- 0-0 (11...Nd5 12.Bg7 Pinning (12.Bg7 Deflection)) 12.Nc7 Qf5 13.Na8 Ne4 (13...Nc6 14.bc6 Bc6 15.d4 cd4 16.ed4 Ra8 17.Bd3+-) 14.Bg7 Kg7 15.Bd3 a6 (15...Qg4 16.0-0 Nf6+-) 16.Qb1 ab5 (16...Nd2 17.Qb2 Qf6 18.Qf6 ef6 19.Nd2+-) 17.Be4 (17.Be4 Qe6 18.cb5+-) 1–0. DEFFM – GuestZDNY, freechess.org, 2018.

4.b5 Nbd7 5.Nf3 e5 6.Be2 c5 7.c4 (7.0-0!?=) 7...e4-/+ 8.Nh4 Ne5 (8...dc4 9.Na3-/+) 9.0-0 (9.cd5 Nd5 10.f4 Ng6 11.Ng6 Qg6+= (worse is 11...fg6 12.Be5 Qd8 13.0-0+=)) 9...Neg4 (9...Nfg4!? 10.g3 Nc4 11.Bc4 dc4-/+) 10.g3 Ne5 11.a4 (11.cd5 Bh3 12.Ng2 A) 12...Qd5? 13.Nf4 Qd7 14.Nh3+- (14.Be5?! Bf1 15.Bf1 Bd6 16.Bf6 gf6+-); B) 12...Nd5+=) 11...Bh3-/+ 12.Re1 Nc4 13.Bc4 dc4 14.Qc2 Rd8 (14...Qd3 15.Rc1 Be7 16.Na3-/+) 15.Qc4 (better is 15.Bf6!? Qf6 16.Qe4 Be6 17.Ra2+=) 15...Be7-+ 16.Ng2 0-0 17.Nf4 Be6 (17...Bf5 18.a5-+) 18.Qc2 (better is 18.Ne6!? fe6 19.a5+=) 18...Bg4-/+ 19.Nc3 (19.Bf6!? Bf6 20.Ra3-/+) 19...Qd2-+ 20.Qd2 (20.Rec1 Rd7-+) 20...Rd2 21.Ba3 Rd7 (21...g5 22.Bc1 Rd7 23.Nfe2-+) 22.Ra2 Rfd8 23.Raa1 g5 24.Ng2 Rd3 25.Ne2 b6 26.Bb2 (26.Nc1-+) 26...Rd2 27.Rab1 Re2 28.Re2 Be2 29.Bc3 (29.h4 h6 30.hg5 hg5-+) 29...Rd1 30.Rd1 Bd1 31.a5 Be2 32.ab6 ab6 33.Ne1 Bb5 34.Nc2 (34.f3 Bc6 35.Kf2 b5-+) 34...Nd5 35.Bb2 (35.Be5 Bd3 36.Ne1 c4-+) 35...Bd3 36.Ne1 b5 0–1. Valpa – Orange, playchess.de, 2002.

4.Bf6 Qf6 5.Nc3 e6 =+.

5.ba5 Ra5 A) 6.Bc3 Ra8 (6...Ra7 7.Nf3 Bg4 8.Bd4 Ra5 9.Ra2 Nbd7 10.Bc3 Ra7+=) 7.Nf3 Bg4 8.Ra2 Nbd7 9.Rb2 b6 10.d4+= (10.h3 Bf3+=) 10...Ne4+=; B) 6.Nf3 Bg4 7.Nc3 Nbd7 8.Nb5 Qb6 9.Rb1 e5 10.Bc3+= Ra8+=.

5.ba5 e5 6.Nc3 Ra5 7.Nb5 (7.Nf3 Nbd7 8.a4 c6 9.Ba3 Qc7 10.Bf8+= Nf8+=) 7...Qe7 8.d4 Qd7 9.de5 Rb5 10.ef6 Rb2 =.

5.ba5 e5 6.d4 A) 6...e4 7.c4 Be6 8.c5 Qd7 (8...Qd8 9.Ne2 Be7 10.Nf4= 0-0=) 9.Qb3 Nc6 10.Bc3 Ra7=; B) 6...Nbd7 7.de5 Ne5 8.Nd2 Ra5 9.Ngf3 Nf3 10.Nf3 Be7=; C) 6...Nc6 7.Nf3 e4 8.Ne5 Na5 9.Bc3 Qe6 10.Qd2 Qb6+=; D) 6...ed4 7.Bd4 Nc6 8.Bc3 Be7 9.Nf3 0-0 10.Bd3 Ne4+=.

5.ba5 e5 6.Be2 Ra5 (6...Be7 7.Nf3 Nbd7 8.d4 e4 9.Ne5 0-0 10.c4 Qa6=; 6...Nbd7 7.d4 Ra5 8.de5 Ne5 9.Nd2 Be7 10.Ngf3 Nf3=; 6...Bf5 7.Nf3 Nbd7 8.c4 Ra5 9.Bc3 Ra8 10.d4 dc4+=) A) 7.Bc3 Ra8 8.Nf3 Nbd7 (8...e4 9.Nd4 Be7 10.0-0 Na6+=) 9.0-0 Qe6 10.Bb2+= 10...Bd6+=; B) 7.d4 ed4 8.Bd4 Ne4 9.Nf3 Nc6 10.0-0 Nd4+=.

5.ba5 e5 6.Nf3 Nbd7 7.d4 e4 A) 8.Ne5 A1) 8...Ra5 9.c4 Qe6 10.Qd2= (10.Nd2 Qf5=) 10...b6=; A2) 8...Be7 9.c4 0-0 10.Nd2 Qe6=; B) 8.Nfd2 Ra5 9.c4 Qe7 10.Bc3 Ra7=.

5.Nc3 e5 6.Nf3 e4 7.Nb5 Qd8 8.Be5 Na6 9.Ng1 Be7 10.ba5 0-0 +=.

5.Nc3 A) 5...a6 6.d4 (6.f4 e5 7.fe5 Ne5 8.Be2 Qe7 9.Na2 Bg4 10.Be5 Qe5+=) 6...a5 (6...e5 7.de5 Ne5 8.Be2 Nc4 9.Bc4 dc4 10.Nf3 Bg4=) 7.b5 e6 (7...e5 8.de5 Ne5 9.Qd4 Ng6 10.Rd1 Be6=) 8.Nf3 Be7 9.Bd3 0-0 10.0-0= c5=; B) 5...c6 B1) 6.Nge2 e5 (6...Nb6 7.Ng3 e5 8.Be2 d4 9.ed4 ed4 10.Nce4 Ne4=; 6...b5 7.a4 ba4 8.Ba3 e5 9.b5 Qc7 10.bc6 Qc6=; 6...a5 7.b5 e5 8.Ng3 Nb6 9.Rb1 Be7 10.bc6 bc6+=) 7.Ng3 b5 8.Be2 (8.a4 ba4 9.b5 a6 10.ba6 Qb8+=) 8...a5 9.ba5 Ra5 10.0-0 (10.d4+= e4+=) 10...Qe6+=; B2) 6.d4 B21) 6...a5 7.b5 e5 8.de5 Ne5 9.Qd4 (9.Be2 Bg4 10.Nf3 Bf3=) 9...c5 (9...Ng6 10.Nf3= Be7=) 10.Qf4 d4=; B22) 6...e6 7.Nf3 Be7 8.Bd3 b5 9.0-0 a5 10.ba5 Ra5=; C) 5...e5 C1) 6.Nf3 C11) 6...a6 7.Be2 Be7 8.0-0 0-0 9.Ne1 (9.Ra2 Re8 10.Qa1+= Qe6+=) 9...Rd8 10.Nd3 b6+=; C12) 6...c6 7.Be2 Be7 8.0-0 0-0 9.Nh4 Nb6 10.Nf3 a5+=; C2) 6.f4 a6 (6...c6 7.fe5 Ne5 8.Be2 Neg4 9.Nf3 Ne4 10.Ne4 de4=) 7.fe5 Ne5 8.Be2 Qe7 9.Na2 Bg4 10.Be5 Qe5+=; C3) 6.Be2 c6 (6...a6 7.Nf3 Be7 8.0-0 0-0 9.Ng5 h6 10.Nf3 Re8+=; 6...Be7 7.Nf3 a6 8.0-0 0-0 9.Ng5 h6 10.Nf3 b5+=) 7.Nf3 Be7 8.0-0 0-0 9.Nh4 Nb6 10.Nf3 a5+=; C4) 6.Nb5 Qc6 (6...Qb6 7.d4 e4 8.c4 c6 9.Nc3 Be7 10.Qb3 0-0=) 7.f4 ef4 8.ef4 Be7 (8...Bd6 9.Nd6 Qd6 10.Qe2 Kd8=) 9.Be2 (9.Nf3 0-0 10.Be2+= a5+=) 9...a5 10.Nd4 Qb6=.

5.c4 a5 A) 6.Qa4 dc4 (6...e5 7.d4 c6 8.c5 Qe6 9.de5 e5 10.Nh3 Ne4=) 7.Bc4 Nd5 8.Bd5 Qd5 9.Nf3 c6 10.Nc3 Qd3+=; B) 6.b5 e5 7.d4 Be7 8.de5 Ne5 9.cd5 Nd5 10.Nd2 0-0=; C) 6.c5 Qc6 7.Nf3 ab4 8.Nd4 Qa4 9.Qc1 Qa7 10.ab4 Qb8+=.

5.c4 dc4 6.Bc4 Qc6 7.Bf1 e5 8.d4 e4 9.Nc3 a5 10.Rc1 Qb6=.

5.c4 dc4 6.Bc4 Ne5 7.Be5 Qe5 8.d4 Qh5 (8...Qd6 9.Nf3+=) 9.Qh5 Nh5 10.Nc3 Bf5 (10...c6!?+=) 11.Nb5+- Rd8 (better 11...Rc8!? 12.Na7 Rd8+-) 12.Nc7+- Kd7 13.Bf7 Kc7 (13...Nf6 14.Rc1 Rc8 15.Rc5 Rc7 16.Rf5+-) 14.Rc1 Kd7 (14...Kb6 15.Bh5 e6 16.Bf3+-) 15.Bh5 e6 16.Nf3 (better 16.Bf3 a5 17.e4+-) 16...b6?? (16...Bd6 17.Ng5 Rc8+-) 17.Ne5 Kd6 (17...Ke7 18.Rc7 Kd6 19.Ra7+-) 18.Nf7 Ke7 19.Nh8 1–0. DEFFM – GuestQMKW, freechess.org, 2018.

5.c4 e5 6.d4 a5 (6...e4 7.Nc3 dc4 8.Bc4 Nb6 9.Bb3 a5 10.Qc2 Qe7=) 7.b5 Be7 8.Nd2 0-0 9.de5 Ne5 10.cd5 Nd5=.

5.Nf3 e5 6.c4 A) 6...e4 7.c5 Qe7 8.Nd4 Ne5 9.f4 (9.Nc3 Bg4 10.f3 Bh5=) 9...ef3 10.Nf3= 10...Ned7=; B) 6...a5 7.c5 Qe6 8.Nc3 Be7 9.Nb5 Bd8 10.Be2 0-0=.

5.Nc3 Bg7 6.Nb5 Qd8 7.Be5 Na6 8.c4 c6 9.Nc3 Nc7 10.d4=.

5.d4 a5 (5...Bg7 6.c4 (6.Nf3 0-0 7.c4 Bg4 8.Nc3 a5 9.b5 dc4 10.Bc4+=; 6.Bd3 a5 7.b5 Bf5 8.Bf5 gf5 9.Qf3 Qd7 10.Qe2=; 6.Be2 Bf5 7.Nf3 0-0 8.c4 dc4 9.Bc4 Nbd7 10.0-0=; 6.Nd2 0-0 7.c4 Bg4 8.Ngf3 a5 9.ba5 Nc6 10.cd5+=) 6...0-0 7.Nc3 Bg4 8.Nf3 a5 9.b5 dc4 10.Bc4+=; 5...Bf5 6.c4 a5 7.Qa4 Qd7 8.b5 Qd8 9.Nc3 Nbd7 10.Qb3+=; 5...Bg4 6.Nf3 Bg7 7.Be2 Nbd7 8.Nbd2 0-0 9.c4 a5 10.b5=) 6.c3 (6.b5 Bg7 7.c4 Bg4 8.Nf3 0-0 9.Nc3 dc4 10.Bc4=; 6.ba5 Bg7 7.c4 0-0 8.Nc3 Ra5 9.cd5 Nd5 10.Nd5=) 6...Bg7 7.Nd2 (7.Nf3 Bg4 8.Be2 0-0 9.0-0 Nbd7 10.Nbd2=) 7...0-0 8.Ngf3 Bg4 (8...Bf5 9.Be2 Nbd7 10.Nh4=) 9.Be2 (9.Bd3 Nbd7 10.Qc2=) 9...Nbd7 10.c4 (10.b5=) 10...c6 (10...Bf3 11.Bf3 ab4 12.Qb3=) 11.c5 Qc7 12.b5 cb5 (12...b6 13.Rc1 Rfc8 14.0-0=) 13.Bb5+= Ne4 14.Qb3 Bf3 15.Nf3 a4 16.Qb4 Nb8 17.Nd2 (17.Bd3 Nc6 18.Qb6 Qb6 19.cb6 Nc5 20.dc5 Bb2=) 17...Nc6= 18.Bc6 bc6 19.Ne4 de4 20.Qc4 Rfb8 21.Bc3 Qb7 22.Bb4 (22.Rc1 Qb3 23.Bb4 e5 24.de5 Be5 25.Qe4 Bb2+=) 22...Qb5 23.Rc1 (23.Qc2 e5 24.de5 Re8=) 23...Qc4 24.Rc4 f5 25.Ke2 Kf7 26.Rd1 Ke6 27.f3 Kd5 28.Rc2 Rc8 29.f4 Bf6 30.Rb1 Rab8 31.Rcb2 Rb5 32.Bd2 Rcb8 33.Rb5+= cb5 34.g3 g5 35.fg5 Bg5 36.Rc1 e6 37.Ba5+= Rc8 38.Rf1 h5 39.Rb1 Kc6 40.Bb4 Rg8 41.h4 Bd8+= 42.Be1 Bc7 43.Bf2 Rg4 44.Rg1 e5 45.Kd2 ed4 46.ed4 f4 47.gf4 Bf4 48.Ke2? Rg1 49.Bg1 b4! 50.Kd1 ba3 51.Kc2 e3 52.Kb1 e2 53.Bf2 Be3!! (53...Be3 54.d5 Kd5-+) 0–1. Begaj,Agron – Ari,Zeki (2175), 23rd ECC Men, Kemer TUR, 2007.

5.Nf3 Nbd7 6.c4 c6 7.Nc3 Bg7 (better 7...e5+=) 8.cd5+- cd5 9.Nb5 (9.Nb5 Qb8 10.Rc1+-) 1–0. PeterRs (2580) – mizuzul (2120), ChessWorld.net, 2019.

5.Nf3 Nbd7 6.c4 Bg7 7.Nc3 dc4 8.Bc4 0-0 9.Nb5 Qb6 10.Rc1+=.

5.Nf3 Bg7 6.Be5 Qd8 7.Be2=.

5.Be5 Qa5=.

5.Be5 c6 6.a3 (6.Nc3 a6 7.a4 Nbd7 8.bc6 bc6=) 6...Qa5= 7.a4 (7.Nf3 a6 8.a4 Nbd7 (8...cb5? 9.ab5 Qd8 10.ba6+-; worse 8...ab5 9.ab5 Qa1 10.Ba1 Ra1 11.Qc1+-) 9.bc6 bc6=) 7...cb5 (better 7...Nbd7!? 8.Nf3 Ne5 9.Ne5 Nd7=+) 8.ab5+= Qb6 (8...Qb4 9.Bf6 gf6 10.Nc3+=) 9.c4 (9.Bd4 Qd6 10.f4+=) 9...Qe6 (9...Nbd7!? 10.Bd4 Qd6+=) 10.Nf3 Ng4? (better 10...Nbd7 11.Bd4 Qf5 12.cd5 Nd5+-) 11.cd5+- Qd5 12.Nc3 (12.Qc2 Be6 13.Nc3 Qd7+-) 12...Qe6? (better 12...Qd8+-) 13.b6! Ne5 (13...ab6 14.Ra8 Pinning (14.Ra8 Deflection); 13...Qb6 14.Nd5 Decoy) 14.Ra7 Nf3 (14...Nbd7 15.Ra8 Nb6 16.Bb5 Nc6 17.Ra2+-) 15.Qf3 Ra7 (15...Nd7 16.Ra8 Nb6+-) 16.ba7 (16.ba7 Nc6 17.a8Q+-) 1–0. DEFFM – GuestCDVN, freechess.org, 2019.

5.Be5 Nbd7 6.a3 Qa5 7.Bc3=+.

5.Bf6 ef6 6.a3 (6.Nc3 Be6=) 6...Qa5 7.Nf3 c6 8.a4 Bd7 9.c4 a6 (9...dc4 10.bc6 Nc6 11.Bc4=) 10.Nc3 (10.bc6 Nc6 11.Nc3 dc4 12.Bc4 Bb4=) 10...ab5=+ 11.cb5 Bb4 12.bc6 bc6 13.Rc1 (13.Qc2 Na6=) 13...0-0 14.Be2 Bc3 15.Rc3 Qa4 16.0-0 Qd1 17.Rd1 Rc8 18.d4 Kf8 19.Bd3 h6 20.Kf1 Ke7 21.Ke2 Kd6 22.Kd2 (22.Rb1 Ra2 23.Ke1 Be6=+) 22...Na6 (22...Bg4=+) 23.e4 (better 23.Rb1!?=+) 23...Nb4-/+ 24.ed5 (24.Ne1 Ra2 25.Nc2 c5 26.dc5 Rc5-/+) 24...cd5 (24...Ra2 25.Ke1-+) 25.Rc8-/+ Bc8 26.Ke3 Ra3 27.Ne1 f5 28.Ke2 Nd3 29.Nd3 Ba6 30.Ke3? (better 30.f4-/+) 30...f4!-+ 31.Ke2 (31.Kf4 Rd3 Deflection) 31...g5 (31...Ra4 32.Kf3 Rd4 33.Nb2-+) 32.f3 (32.Rd2 Ra4 33.Kd1 Rd4-+) 32...f5 33.Rd2 h5 34.h3 h4 0–1. GuestHYTV – GuestQSGX, freechess.org, 2017.

5.c4 e5 6.Qb3 (6.cd5!? Nd5 7.Nc3=) 6...Be6+= 7.Nf3 Nbd7 8.Ng5 dc4 (8...Bf5 9.cd5 e4 10.d3 ed3 11.e4 Ne4 12.Bd3+=) 9.Bc4 Bc4 10.Qc4 Qd5 11.Qd5 Nd5 12.Nc3 Nb4 13.0-0 Be7 14.Nf3 c4 15.Ne4 Nd3 16.Bc3 f5 17.Ng3 0-0 Black prepares f4 18.Ne1 N3c5 19.Nc2 f4 20.ef4 ef4 (20...Rf4?! 21.Ne2 Rh4 22.Ne3=) 21.Ne2 Rae8 22.Ned4 Nb6 23.Rfe1 Nd3 24.Re2 Nd5 25.Ne1 Bc5 26.Nd3 cd3 27.Re8 Re8 28.Nb3 Bb6 29.Bd4 Re2 30.Bb6 Nb6 (worse is 30...ab6 31.Rd1=) 31.Kf1 Nc4 32.Rd1 b6 33.Kg1 (33.f3 g5+=) 33...Kf7 (33...Re5!?-/+) 34.Nc1= Nd2 (34...Re5!? 35.Nd3 Rb5 36.Nf4 Ra5+=) 35.Ne2+= de2 36.Re1 f3 37.Kh1 fg2?? (better is 37...Ne4 38.gf3 Nf2 39.Kg2 Nd3 40.Re2 Nf4 41.Kf2 Ne2 42.Ke2 Ke6-/+) 38.Kg2+- Ne4 39.Re2 Nc3 40.Rb2 Ke6 (40...Nd5 41.Rc2+-) 41.a4! Kd5 (41...Na4 42.Ra2 Decoy) 42.Rd2 Ke6 43.Rc2 Ne4? (43...Na4 44.Rc7 g6+-) 44.Rc7 Kf6 45.Ra7 Nc5 46.a5 ba5 47.Ra5 Nd7 48.b6! Ke7 (48...Nb6 49.Ra6 Decoy) 49.b7 Kd8 (49...Kd6 50.Rf5 Nb8+-) 50.Rc5! (50.Rc5 Nb8 51.Rc8 Kd7 52.Rb8+-) 1–0. purplegadge (1685) – sastro (1745), gameknot.com, 2011.

5.Nf3= Bg4 6.Be2 Nbd7 7.a4 (7.h3 Bf3 8.Bf3 e5=) 7...a6 (7...e5 8.0-0=+) 8.c4 (8.ba6 Bf3 9.ab7 Rb8 10.Bf3 Rb7 11.Bf6 Nf6+/–) 8...e5 9.cd5 Nd5 10.Nc3 Nb4 11.d3 f5 12.0-0 Be7 13.Ne1 Be2=+ 14.Qe2 Bf6 15.Rd1 0-0 16.Qf3 Qe6 17.Qb7 Rfb8 18.Qf3 ab5 19.ab5 e4 20.de4+/– fe4 21.Qe4 Qe4 22.Ne4 Bb2 23.Rd7 c4? 24.Nd6+- c3 25.Nc4?? Ra1? 26.Nd3?? Nd3 27.Ra1+= Ba1 28.Na3?? Ra8 29.b6 Ra3 30.b7 Rb3-+ 31.Rd8 Kf7 32.b8Q Rb8 33.Rb8 c2 34.Rc8 c1Q 35.Rc1 Nc1 36.h3 Kf6 37.g4 Nd3 38.f4 Bc3 39.Kg2 Ke6 40.Kf3 Ne1 41.Ke4 Bd2 42.f5 Kf6 43.h4 Be3 44.Ke3 Ng2 45.Ke4 Nh4 46.Kf4 h6 47.Kg3 Nf5 48.gf5 Kf5 49.Kf3 g5 50.Kg3 h5 51.Kf3 h4 52.Kg2 Kf4 53.Kh3 Kf3 54.Kh2 g4 55.Kg1 g3 56.Kh1 g2 57.Kg1 h3 ½–½. Riveline,Maurice – Banderet,Bertrand, FRA–ch op–B Paris, 1994.

5.Ba3 Qe6 6.Bf8 Kf8 7.Nf3 g6 8.Be2 Kg7 9.0-0 c6 10.bc6 bc6 11.d3 h6 12.Nbd2 Nbd7 13.c4 Rd8 14.Qc2 Ba6 15.Rab1 Rac8 (15...dc4 16.dc4 c5 17.Bd3=) 16.h3 (16.Rfd1 dc4 17.dc4 Rb8+=) 16...dc4= 17.Nc4 Bc4 18.dc4 Nc5 19.Rfd1 Nfd7 20.Qc3 Rb8 21.Qa3 Qe8 22.Rb8 Rb8 23.Qa7 (23.Rd6 Rb1 24.Bf1 Ne4=) 23...Ra8= 24.Qc7 Ra2 25.Bf1 Qe6 (25...e4!? 26.Nd4 Ne5=) 26.Rd6+= Qf5 27.Qc6 (27.Rc6?? Qc2 28.Rc5 Qf2 29.Kh2 A) 29...Nc5?! 30.Qe5 Kf8 31.Qd6 (worse 31.Qc5 Kg8-/+) 31...Ke8 32.Qc5=+; B) 29...Qf1-+) 27...Ra1? (better 27...e4 28.Rd5 Qf6 29.Qf6 Kf6+=) 28.e4!+- Qf4 (28...Ne4 29.Qd7 Deflection; 28...Qe4 29.Rd7 Deflection) 29.Rd7 Nd7 30.Qd7 Qe4 31.Qd6 Ra5 (31...Rf1 32.Kf1 Qc4 33.Ke1 Qc1 34.Ke2 Qc4 35.Qd3 Qa2 36.Nd2+-) 32.c5 Qf5 (32...Ra1 33.Qe5 (worse 33.Ne5 Qe2 34.Kh2 Rf1=+) 33...Qe5 34.Ne5+-) 33.Ne5 g5 (33...Qf6 34.Nc4 Ra2 35.Qf6 Kf6 36.Nd6+-) 34.Ng4 Rc5 (34...Qe6+-) 35.Qh6 Kg8 36.Nf6 Qf6 37.Qf6 1-0. cipiripi (2255) - Nimrod64 (2340), Rated Blitz game, lichess.org, 2015.

5.c4 a6 6.Nf3 ab5 7.Be5 Qe6 8.cb5 Qb6 0–1. bispo (2000) – pallen (2120), net–chess.com, 2011.

5.c4 c6 6.a4 (6.Nf3 Nbd7=) 6...Nbd7 7.Nf3 e4 8.Nd4 Ne5 9.cd5 c5 10.Ba3 (10.f4 Neg4 11.Nc2 Nd5=+) 10...Nd5 11.Qc2 f5 (11...Nf6 12.Nc3 Qd8 13.Nb3 Nd3 14.Bd3 ed3 15.Qd1=+) 12.Nc3 (12.d3 Qc7 13.Nb3 ed3-+) 12...Nb4 13.Bb4 cb4 14.Na2 Be7 15.Rb1 0-0 (15...Ng4 16.h3 Ne5 17.Nb4=) 16.Nb4 Bd7 (16...Be6 17.Ne6 Qe6 18.Qb3 Qb3 19.Rb3 Bb4 20.Rb4=) 17.Be2 (17.Qb3 Kh8=) 17...Rac8 (17...Rfc8 18.Qb3 Kh8 19.Qd5+=) 18.Qa2 Kh8 19.0-0 (19.Qd5 Rc7=) 19...Qh6 (19...f4!?=) 20.Qd5+= Bd6 21.g3 (21.f4 ef3 22.Bf3 Nc4=+) 21...Rf6 22.d3 Qh3+= 23.f4 Rh6 24.Rf2 Bb4? 25.Bf1?? Rc5 26.Qe5 Re5 27.Bh3 Rc5 28.Bf5!! Bf5 29.Nf5 Rf5 30.de4 Bc5 31.ef5 Be3 32.Re1 Bf2 33.Kf2 33...Kg8 34.h4 Kf7 35.Rc1 Rd6 36.Rc7 Kf6 37.Rb7 a6 38.g4 ab5 39.ab5 Rd2 40.Ke3 Rb2 41.Rb6 Kf7 42.h5 Rb4 43.g5 Rb1 44.f6 g6 45.Rb7 Kg8 46.hg6 1–0. Danek,Vaclav – Koenig,Vlastislav, Klatovy op, 1995.

5.c4 Bg4 6.Nf3 Nbd7 7.cd5 =+.

5.d4 Nbd7 6.de5 Ne5 7.Qd4 =.

5.Nf3 Qb4?? 6.Be5+- Nfd7 (6...Qe7!?+-) 7.Bc7+- Na6?? (better 7...Be7+-) 8.ba6 Qc5 (8...ba6 9.Nc3 Qc5 10.Bf4+-) 9.ab7 Bb7 10.Bg3 Qb6 (10...Bd6 11.d4 Qc6 12.Bd6 Qd6 13.Nbd2+-) 11.c4 (better 11.Nc3 a6+-) 11...Qb2 (11...dc4 12.Bc4 Rc8+-) 12.Nc3 Nc5 (12...Qb6 13.Rb1 Qc6 14.Nd5+-) 13.Rb1 Qa3 14.Nb5 Nd3 (14...Qa2 15.Nc7 Ke7 16.Na8 Ba8 17.Bh4 f6+-) 15.Bd3 Qd3 16.Nc7 Ke7 17.Rb7 Rc8 18.Nd5 Kd8 19.Ne5 (19.Qa4 Qf1 20.Rf1 Rc6 21.Qc6 Bd6 22.Qd7) 19...Rg8 20.Nf7 Ke8 21.Qa4 (21.Qa4 Rc6 22.Qc6) 1–0. DEFFM – GuestRYVQ, freechess.org, 2018.

5.Nf3 Nbd7 6.Be2 Qe6 7.d3 Bd6 8.Nbd2 0-0 9.h3 Rd8 10.Qc1 Nf8 (better is 10...a6!? 11.a4 Nc5+=) 11.c4= Ng6 12.cd5 Nd5 13.d4 ed4 14.Nd4 Qe7 15.0-0 Ne3 16.fe3 Qe3 17.Kh1 Qg3 18.N4f3?? (better is 18.N2f3 Nf4 19.Rg1 Nh3 20.Re1+=) 18...Nf4-+ 19.Rg1 Ne2 20.Qc2 (20.Qe1 Ng1 21.Kg1 Qe1 22.Re1-+) 20...Qh2! 21.Nh2 (21.Nh2 Ng3) 21...Ng3 0–1. Bach,Matthias (2250) – Brunello,Sabino (2590), Copenhagen Denmark, Politiken Cup, 2013.

5.Nf3 Nbd7 6.c4=.

5.Nf3 Nbd7 6.Be2 Bg7 7.Ba3 Qe6 8.Nc3 0-0 (8...Ne4!? 9.Bb2 0-0=) 9.Nd4+= Qe5?? (better 9...Qb6 10.Na4 Qa5+-) 10.f4+- Qd4 11.ed4 Re8 12.h4 Nb6 (12...h5 13.f5!+-) 13.h5 Nc4 (13...gh5 14.Bh5 Nc4 15.Bc1+-) 14.Bc4 dc4 15.hg6 fg6 (15...hg6 16.Qe2 Be6 17.Qf3+-) 16.Qe2 Bg4 (16...a6 17.Qc4 e6 18.Qc7+-) 17.Qc4 Kf8 (17...e6 18.Qc7 Nd5 19.Qb7+-) 18.Qc7 Nh5 (18...b6 19.Rc1+-) 19.Rh4 Nf6 (19...Bc8 20.Nd5 Bd4 21.Be7 Kf7 22.0-0-0+-) 20.Kf1 (20.Qb7 a6 21.ba6 Rab8+-) 20...h5 (20...Bf5 21.Re1 Ng8 22.Rh7 Bc2 23.Qb7+-) 21.Re1 Rac8 (21...Ng8 22.Nd5 Rac8 23.Qb7+-) 22.Be7 Kg8 23.Qd6 Bf5 (23...Nh7 24.Qg6 Nf8 25.Bf8 Kf8 26.Re8 Re8 27.Qd6 Kf7 28.Qd5 Kf8 29.Qc5 Kf7 30.Qa7+-) 24.Bf6 (24.Bf6 Bf6 25.Re8 Re8 26.Qf6+-) 1–0. Janek – Tempoh, internet, 2017.

5.Nf3 Bg7 6.c4 Bg4 (6...0-0 7.cd5 Qd5 8.Nc3=) 7.h3 (7.h3 Bf3 8.Qf3+=). Ral – prisonbreak, internet, 2007.

5.Ba3 Qa5 6.c4 dc4 7.Bc4 e6 8.Bf8 Kf8 9.Nc3 Nc6 10.0-0 Ne5 11.Ne5 Qe5 12.d4 Qa5 13.Qb3 c6 14.Rab1 Ke7 15.e4 Rd8 16.e5 Ne8 17.Rfd1 Kf8 18.Ne4 Qc7 19.Qh3 h6 20.Rd3 Qe7 21.g4 (21.a4 Kg8=) 21...Kg8 22.g5 hg5 23.Qh5 g6 (23...f6 24.Rh3 Rd4 25.ef6 Nf6 26.Nf6 Qf6 27.Qe8 Qf8 28.Be6 Be6 29.Qe6 Qf7 30.Rh8 Kh8 31.Qf7+-) 24.Qh6= Qf8 (24...g4 25.Ng5 Nf6 26.ef6 Qf6 27.Ne4+-) 25.Qg5+= Ng7?? (better is 25...Rd7+=) 26.Nf6 (26.Nf6 Kh8 27.Qh6) 1–0. Moehring,Norbert (1810) – Kycler,Jan (1760), Alpenpokal Obersdorf op, 2004.

5.Qc1 Nbd7 6.a4 c6 7.Nc3 Qa5 8.Ba3 e6 9.Bf8 Nf8 10.Ne5 N8d7 11.Nd7 Nd7 12.Qa3 c5 13.Rb1 a6 14.Qb2 0-0 15.Be2 d4 16.Ne4 Qa4 17.0-0? (better is 17.Bf3!?-/+) 17...de3-+ 18.d3 ef2 19.Rf2 b5 Black plans c4 20.c3 c4 (20...b4 21.cb4 Rb8 22.Qd2 cb4 23.d4-+) 21.d4 (21.dc4 bc4 22.Qc1 Ne5-+) 21...Bb7 (21...Qa5!? 22.Rbf1-+) 22.Ra1 Qa1! (22...Be4?! 23.Ra4 ba4 24.Bc4+=) 23.Qa1 Be4 24.Bf3 Bf3 25.Rf3 a5 26.Qa3 Nf6 27.Qc5 Rab8 (27...Rfb8 28.h3-+) 28.Qe5 (28.h3 a4-+) 28...Nd5 Black prepares b4 29.Rg3 g6 30.h4 b4 31.h5 Rb6 (31...bc3?! 32.h6 f6 33.Qe6 Rf7 34.Qd5=; 31...Nc3 32.h6 f6 33.Qc7 Ne2 34.Kf2 Rf7 35.Qb8 Rf8 36.Qc7 Rf7 37.Qc8 Rf8 38.Qe6 Rf7 39.Qe8 Rf8 40.Rg6 hg6 41.Qg6 Kh8 42.Qg7) 32.hg6 fg6 (32...hg6 33.Rh3 f6 34.Qh2=; 32...Nc3?? 33.gh7 Kh7 34.Qg7) 33.Qh5 Rf7 (33...Nc3?! 34.Rg6 hg6 35.Qg6 Kh8 36.Qh6 Kg8 37.Qg6 Kh8 38.Qh6 Kg8 39.Qg6=) 34.Qe2 b3 35.Qc4 (35.Qe4 b2 36.Qb1 a4-+) 35...b2 36.Qc8 Kg7 37.c4 b1Q 38.Kh2 Nf6 (38...Nf6 39.Qc5 Qe4-+) 0–1. Sinclair,Colin – Wells,Daniel J (2015), GBR–ch Major op, 2008.

4.a3 e6= A) 5.Be2 c5 (5...a5 6.b5 c6 7.Nc3 e5 8.Nf3 Bd6; 5...Bd6 6.Nf3 0-0 7.0-0 a5 8.b5 c6) 6.bc5 Bc5 7.Nf3 Nc6 8.Ne5 Ne5; B) 5.Bd3 c5 (5...a5 6.b5 c6 7.Qe2 Bd6 8.Nf3 0-0; 5...Bd6 6.Nf3 0-0 7.0-0 Qe7 8.Be5 a5; 5...Nc6 6.Nf3 Bd6 7.b5 Na5 8.Ne5 c5) 6.bc5 Bc5 7.Nf3 0-0 8.0-0 Nc6; C) 5.c4 Be7 (5...a5 6.b5 Be7 7.Nc3 0-0 8.Rc1 c6; 5...Bd6 6.c5 Be7 7.Nf3 a5 8.Be2 0-0; 5...dc4 6.Bc4 Bd6 7.Nc3 Nc6 8.Nf3 e5) 6.Nc3 0-0 7.Nf3 dc4 8.Bc4 a5; D) 5.Nf3 c5 (5...Bd6 6.Be2 0-0 7.0-0 a5 8.b5 c6; 5...a5 6.b5 c6 7.bc6 Nc6 8.Be2 Be7) 6.bc5 Bc5 7.Be2 Nc6 8.Ne5 Ne5.

4.b5 c6 5.a4 a6 6.c4 (6.Nf3 e6=) 6...dc4=+ 7.Bc4 (7.ba6 b5=+) 7...ab5 8.ab5 Ra1 9.Ba1 cb5 10.Be2 Bc6 (10...e6 11.Nf3=+) 11.Nf3 e6 12.0-0 Be7 (12...Bd6 13.Nc3=+) 13.d4 (13.Bf6 Bf6 14.d4 0-0=) 13...0-0=+ 14.Nbd2 (14.Bd3 b4=+) 14...Nbd7 (14...Na6 15.Qb1=+) 15.Qb3 Exerts pressure on the isolated pawn (15.Qb1 Qa5=+) 15...Nb6 (15...b4 16.Rc1=+) 16.Bb5= Bd5 (16...Bb5 17.Qb5 Qc7 18.e4=) 17.Qb1+= Ne4?? (better 17...Qa8+=) 18.Ne4+- Be4 1–0. GuestSSGD – GuestRCSY, freechess.org, 2018.

4.b5 e5 5.a4 (better is 5.Be5!? Bf5 6.Nf3+=) 5...e4 6.Be2 Bf5 (6...Bd6 7.Nc3+=) 7.f3 (7.a5 Be6+=) 7...c5 (7...Bd6 8.a5+=) 8.d4 (8.Nc3 Bd6+=) 8...cd4 (8...c4!?-/+) 9.Bd4= ef3 (9...Bb4 10.Nd2=) 10.Nf3+= Ne4 (10...Qa5 11.Nbd2+=) 11.0-0 b6 (11...Qc8 12.a5+=) 12.Nfd2 Qg5 13.Qe1 (13.c4 Bc5 14.Nf3+/– (14.cd5 Bd4 15.ed4 Qe3 16.Kh1 Nf2 17.Rf2 Qf2-/+)) 13...Bb4? (13...Bd6 14.a5 ba5 15.Ra5 Nd2 16.Nd2+=) 14.Ne4 (better is 14.Rf5 Bd2 15.Qf2+- (15.Nd2?! Qf5 16.c4 Nd7=)) 14...Be1?? (better is 14...Be4 15.Qf2 0-0=) 15.Ng5+- f6 16.Rf5 fg5 17.c3 (17.Bf3 Nd7 18.Bg7 Rg8 19.Bd5 Rg7 20.Ba8 Re7+-) 17...Rf8 (17...g4 18.Re5 Kf7 19.Bg4+-) 18.Rf8 Kf8 19.g3 h5 (19...Nd7 20.Na3 Bc3 21.Rf1 Nf6 22.Bc3+-) 20.Na3 Bg3 21.hg3 g6 22.Rf1 Kg8 (22...Ke7 23.c4 Nd7 24.cd5+-) 23.c4 (better is 23.Bf3 Kh7 24.Bd5 Nc6 25.Bc6 Rd8+-) 23...Nd7 24.cd5 (better is 24.Bf3 Rf8 25.Bd5 Kh7 26.Rf8 Nf8+-) 24...Nf8 (24...Rf8 25.e4+-) 25.Bc4 Kh7 26.Rf7 Kg8 27.d6 Rd8 28.Rd7 Ne6 29.Be6 Kf8 30.Rd8 1–0. tanto – gkristiansen, net–chess.com, 2000.

4.b5 e6 A) 5.Nf3 a6 (5...Bd6 6.Be2 a6 7.a4 Qe7 8.Ne5 ab5; 5...c6 6.a4 Bd6 7.Be5 Be5 8.Ne5 Ne4; 5...Bc5 6.Be2 0-0 7.0-0 a6 8.a4 ab5) 6.a4 Bd6 7.Be2 Qe7 8.Ne5 0-0; B) 5.Be2 a6 (5...Bd6 6.Nf3 a6 7.a4 Qe7 8.Ne5 0-0) 6.a4 Bd6 7.Nf3 Qe7 8.Ne5 ab5; C) 5.Be5 Ne4 (5...Be7 6.Nc3 0-0 7.Qf3 c6 8.Rb1 cb5; 5...Bc8 6.Nf3 Nbd7 7.d4 Ne5 8.de5 Nd7) 6.Nc3 a6 7.Ne4 de4 8.Qg4 ab5.

4.c4 a6 5.a4 (5.a3 e6=) 5...e6=+ 6.b5 a5 (6...Be7 7.Qf3=+) 7.Nc3 Bb4 8.cd5 Nd5 (better 8...ed5!? 9.Nf3 0-0=) 9.Nd5+- ed5 10.Bg7 Rg8 11.Bd4 Qg5 (11...c5 12.bc6 Nc6 13.Nf3+-) 12.Nf3 Bg4?? (better 12...Qf5+-) 13.Be2 (better 13.Ng5 Bd1 14.Nh7+- (14.Rd1?! Rg5 15.Rc1 c6+-; 14.Kd1?! Rg5 15.Rc1 c6+-)) 13…Qg6 0–1. GuestXKFT – GuestNYPK, freechess.org, 2018.

4.c4 e5 5.Qb3= d4 (5...Nc6 6.cd5 Nb4 7.Be5=) 6.Nf3 (6.ed4 ed4 7.Nf3 Qe7 8.Be2 Nc6=) 6...Nc6 (6...de3 7.de3 (worse 7.Be5 ef2 8.Kf2 Ng4 9.Kg1 Ne5 10.Ne5 Be6 11.Qa4 c6-/+; worse 7.Ne5 ef2 8.Kf2 Be6=+; 7.Qe3?! Bb4 8.a3 Ng4=+) 7...e4 8.Ne5=) 7.a3 (7.b5 Na5 8.Qa4 a6 9.Ne5 ab5 10.cb5 de3 11.de3 Be6+=) 7...Be7 (7...Bg4 8.ed4 Nd4 9.Nd4 ed4 10.f3=+) 8.ed4 (8.b5 Na5 9.Qa4 a6 10.Ne5 ab5 11.cb5 Be6 12.b6 c6 13.Qd4 Bd5=+) 8...ed4= 9.Nd4 (9.c5 0-0=) 9...0-0 10.Be2 (10.Ne2=) 10...b6 (10...Nd4!? 11.Bd4 Bg4=) 11.0-0 (11.Nc6 Bc6 12.0-0 Re8+-) 11...a5 (better 11...Nd4 12.Bd4 Bg4 13.Bg4 Qd4+=) 12.b5 (better 12.Nc6 Bc6 13.b5+-) 12...Nd4=+ 13.Bd4 Bg4 14.Bf6 Be2 (better 14...Bf6!? 15.Bg4 Ba1=) 15.Be7+- Qe7 16.Re1 Bc4 (16...Qe6 17.Nc3 Qc4 18.Qc4 Bc4 19.Re4+=) 17.Re7 Bb3 18.Rc7 Rac8 19.Rc8 Rc8 20.Nc3 a4 (20...Rd8 21.Rb1 a4 22.Rb2+-) 21.Re1+- g6 (21...Rd8 22.Re7+-) 22.f4 (22.Re7 Rd8+-) 22...Rd8 23.Re2 Rd4 24.f5 (24.g3 Kf8+-) 24...gf5+= 25.Kf2 Bc4 (25...f4 26.Re8 Kg7 27.Ke1+=) 26.Re8 (26.Ke3 Rd3 27.Kf4 Kg7+-) 26...Kg7 27.Ke1 (27.Rc8 Rd2 28.Ke1 Rd4+=) 27...Rg4 (27...Rf4!? 28.d3 Bd3=) 28.g3+- (28.Na4? Bb5 29.Rb8 Re4 30.Kf2 Rf4 31.Ke3 Ra4 32.Rb6 Ra3 33.Kf2 Bd3-+) 28...f4 (better 28...h5+-) 29.gf4 (29.Re4 Bb3 A) 30.Na4? f5 31.Rf4 Rf4 (31...Ba4?! 32.Rf5 Bb3 33.Rf4 Rf4 34.gf4-/+) 32.gf4 Ba4-+; B) 30.gf4?! Rg1 31.Kf2 Rh1+-; C) 30.Ke2+-) 29...Rf4= 30.d4? (30.Kd1!?=) 30...Rd4 (30...Rf3 31.Kd2 Rd3 32.Kc2 Rd4 33.Rb8 Bb3 34.Kc1-/+) 31.Rb8 (better 31.Ra8 Rd3 32.Na4 Ra3 33.Nb6 Ra8 34.Na8 Bb5 35.Nc7-+) 31...Bb3 (better 31...Rd3!? 32.Na4 Ra3 33.Nb6 Bb5-/+) 32.Rb6= Rd3 (32...Rh4=) 33.Ne2?? (better 33.Rc6+-) 33...Bc4-/+ 34.Rb8? (34.Ng3!? Rd5 35.h4-/+) 34...Ra3 (34...Re3 35.Kd2 Re2 36.Kc3-+) 35.b6? (better 35.Ng3-+) 35...Re3 36.b7 Ba6 (better 36...Re2 37.Kd1 Rb2-+) 37.Rg8= Kg8 38.b8Q Kg7 39.Qa7 (39.Qb2 Kg8 40.Qd4 Re2 41.Kd1 Re6=) 39...Re2 40.Kd1 Re6 41.Qd4 ½–½. jaddwarrior (1800) – mikeinator (1685), ChessWorld.net, 2014.

4.Be2 e6 A) 5.b5 a6 (5...Bd6 6.Nf3 a6 7.a4 Qe7 8.Ne5 ab5) 6.a4 Bd6 7.Nf3 Qe7 8.Ne5 ab5; B) 5.a3 c5 6.bc5 Bc5 7.Nf3 0-0 8.Ne5 Bd6.

4.f4 e6 5.a3 =.

4.f4 Bg4 5.Be2= Qd7 (5...Be2 6.Qe2 e6 7.Qb5 Nc6 8.a3=) 6.a3 Nc6 (6...a5 7.Bg4 Ng4 8.b5=) 7.Nf3 0-0-0 (7...e6 8.0-0=) 8.b5+= Na5 (8...Nb8 9.Ne5 Be2 10.Qe2+/–) 9.Ne5+/– Qf5?? (better is 9...Be2 10.Qe2 Qe8+/–) 10.Ng4+- Nd7 (10...Nc4 11.Bd4 Kb8 12.0-0+-) 11.d3 e6 (11...b6 12.Nd2+-) 12.Bc3 b6 13.Ba5 ba5 14.d4 Qe4 (14...h5 15.Nf2+-) 15.0-0 Qg6 16.c4 Nb6 (16...dc4 17.Bc4 Bd6 18.Nc3+-) 17.Ne5 Qf6 18.Qe1 a4 19.Qa5 c5 (19...Kb7 20.Qa6 Ka8 21.c5+-) 20.Qa6 Kc7 (20...Kb8 21.Nc6 Kc7 22.Qa7 Kc8 23.Qb6 cd4 24.cd5+-) 21.Qa7 Kd6 22.dc5 1–0. Kucharkowski,Jens – Graefe,Hartmut, CiF, 2002.

5.a4 ab5 6.ab5 Bb5?? (better 6...Ra1 7.Ba1 Bf5=) 7.Ra8+- (worse 7.Bb5 Nbd7+-) 7...Bf1 8.Kf1 e6 (8...Nfd7 9.d3+-) 9.Bf6 Qf6 (9...gf6 10.Nc3 Bc5+-) 10.Rb8 Ke7 (10...Kd7 11.Nc3 g6 12.Rb7+-) 11.Rb7 Kd7 12.c3 (12.Nc3 Bd6+-) 12...Bd6 (12...e5 13.Rb8 Qc6 14.Qg4 Ke7 15.Nf3+-) 13.Qa4 Ke7 14.Nf3 (14.Na3 Qf5 15.Nb5 Qe4+-) 14...Rc8 (14...Qf5 15.Ke2+-) 15.Nd4 (15.Na3 Qg6+-) 15...Kf8 16.Qd7 Rd8 17.Qb5 e5 (17...Qg6 18.Rb8 Rb8 19.Qb8 Ke7 20.Nc6 Kd7 21.Qb5+-) 18.Nc6 Rd7 19.Rb8 Rd8 20.Rd8 (20.Rd8 Qd8 21.Nd8+-) 1–0. DEFFM – GuestTBDR, freechess.org, 2019.

5.ba6 Na6 6.Nf3= (6.Be2 e6 7.Nf3 Be7 8.Ne5 0-0) 6...Bg4 7.Bb5 c6 8.Ba6 Ra6.

5.c4 dc4-/+ 6.ba6 Na6 7.Bc4 Bc6 8.Nf3 e6 9.Nc3 Be7 10.Ne5 Nc5? (10...Bg2 11.Rg1 Bd6 12.Nf7 Kf7 13.Rg2 Be7+=) 11.Nc6+/– bc6 12.Qc2 0-0 13.0-0 Rb8 14.d4 Nb7 15.Rab1 (15.Rfd1 Nd5+/–) 15...Na5 (15...c5!?+/–) 16.Bd3+- Nd5 (16...Qd6 17.Rfc1+/–) 17.Nd5 (17.Bh7 Kh8 18.Be4 Bd6+-) 17...Qd5 18.Bc3 Nc4 19.e4 Na3 20.ed5 Nc2 21.Bc2 ed5 (21...cd5 22.a4+-) 22.Rfe1 Bd6 (22...Rb1 23.Rb1 Ra8 24.Rb7 Ra2 25.Bb1+-) 23.a4 (23.Ba4 Rb6+-) 23...Rfe8 (23...c5 24.dc5 Bc5 25.a5+-) 24.Re8 Re8 25.Bd3 f6 26.Rb7 Ra8 27.a5 c5 (27...Kf7 28.a6+- (28.Bh7?! g6+-)) 28.dc5 Bc5 29.Rc7 d4 30.Bd2 Bd6 31.Bc4 Kf8 (31...Kh8 32.Rd7 Bc5 33.Kf1+-) 32.Rf7 Ke8 33.Rg7 Rc8 34.Bd3 Bb4 (34...Rc7 35.Rc7 Bc7+-) 35.Bb4 Rc1 36.Bf1 Rb1 37.a6 Rb4 38.Rb7 Ra4 39.Bb5 1–0. Fritz 11 – anony, internet, 2013.

5.Bf6 ef6 6.Nc3 Be6 7.ba6 Na6 8.Qb1 Qc8.

5.c4 e6 (5...a6 6.Bf6 ef6 7.ba6 Na6 8.cd5=) 6.Nf3 (6.d4 a6 7.cd5 ed5 8.dc5 Bc5 9.ba6 Na6=) 6...a6 7.a4 (7.Nc3 ab5 8.Nb5 Bb5 9.cb5 c4=+) 7...ab5 (7...Bd6 8.d4=) 8.ab5= Ra1 9.Ba1 Bd6 (9...Be7 10.d4=) 10.Be2 (10.d4 0-0=) 10...0-0 (10...dc4 11.Bc4 0-0 12.0-0=) 11.h3 (11.d4 dc4 12.Bc4 cd4 13.Qd4 Qc7=) 11...Ne4 (11...Qe7 12.0-0=) 12.Nc3 Nc3 (12...Nf6 13.0-0=) 13.Bc3 f6 (13...Qe8 14.Qb3=) 14.0-0+= b6 (14...dc4 15.Bc4 Kh8 16.d4+=) 15.Qc2 (15.d4 cd4 16.Qd4 Bc5+=) 15...Bc8 (15...Be8 16.cd5 ed5 17.Bd3+=) 16.Ra1 Qc7 17.d4 Nd7 (17...cd4 18.Nd4 e5 19.Nf5+=) 18.cd5 (18.e4 Bb7 19.ed5 ed5+=) 18...ed5 19.Bd3 f5? (better 19...g6!?+-) 20.Bf5+- Nf6 21.dc5 Qc5 22.Bd3 (22.Bd4 Qc2 23.Bc2 Bd7+-) 22...Ne4 23.Be4 de4 24.Qb3 (24.Ra7 Bc7 25.Ng5 Qc4 26.Qe4 Qe4 27.Ne4 Rf7+-) 24...Kh8 25.Nd4?? (25.Ra7 Rg8 26.Nd2 Bf5+-) 25...Bh3 (25...Qe5 26.Nf3 Qc5 27.Ra7+-) 26.gh3 (better 26.Ra7!? Be7 27.gh3 Qg5 28.Kf1+-) 26...Qg5= 27.Kf1 1–0. DEFFM – certis, freechess.org, 2016.

5.Be2 c4 (5...a6 6.ba6 Na6 7.Nf3 e6 8.Be5 Ng4; 5...e6 6.Nf3 c4 7.Nc3 Bb4 8.Rb1 Qa5; 5...Qb6 6.a4 a6 7.a5 Qd6 8.ba6 ba6) 6.Bf6 gf6 7.Nc3 e6 8.Rb1 Rg8.

5.Nf3 Bg4 (5...e6 6.Be2= c4 7.Nc3 Bb4 8.Rb1 Qa5; 5...a6 6.Nc3 Qc7 7.ba6 Na6 8.a4 c4; 5...c4 6.Nc3 e6 7.Be2 Bb4 8.Rb1 Qa5) 6.Nc3 (6.h3 Bf5= (6...Bh5 7.g4 Bg6 8.Ne5 e6) 7.Be2 a6 8.0-0 ab5) 6...e5 (6...e6 7.h3 Bf3 8.Qf3 Bd6) 7.h3 Bh5 (7...Bf3!? 8.Qf3 e4=) 8.g4+= Bg6 (8...d4 9.Nb1 e4 10.gh5 ef3 11.Qf3+/–) 9.Ne5+/– Bd6 (9...Be4!? 10.f3 Bd6 11.Ne4 de4+/–) 10.Ng6+- hg6 11.g5 Ng8 (11...Nh7 12.Bg2 Ng5 13.Bd5+-) 12.Nd5 (better is 12.Bg2+-) 12...Ne7? (better is 12...Qg5 13.Qf3 Nd7+-) 13.Bg7 Rg8 (13...Be5 14.Nf6 Bf6 15.Bf6 Qd5+-) 14.Nf6 1–0. marre – edvsr, internet, 2010.

5.a4 Bg4 6.c4 (6.h3 Bd7=) 6...dc4 7.Bc4 e6 8.b5 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.0-0 Bd6 12.h3 Bf3 (12...Bh5 13.d3=) 13.Qf3+= 0-0 (13...Qa8!? 14.Bc3 0-0=) 14.Qb7+- Nc5 (14...Nb6 15.Be2+-) 15.Qc6 Nce4 (15...Nd5 16.d4 Na4 17.Bb3+-) 16.d3+- Ng5? (better 16...Nc5+-) 17.f4 1–0. DEFFM – Pushkin, freechess.org, 2018.

5.c4 c6 6.Be2 e6 7.0-0 (7.c5 b6=) 7...Bb4 8.Qb3 Qb6 9.Bd4 c5 10.Bf6 gf6 11.cd5 ed5 12.Nc3 Be6 13.Nd5 Qc6 (13...Qd8!? 14.e4 b5+/–) 14.Nf6 Ke7 15.Qb2 Nd7 16.Nd7 Bd7 17.Ne5 Qd6 18.Nd7 Kd7 19.d4 cd4 (19...Rhg8 20.a3 Qd5 21.g3+-) 20.Rfd1 (20.Qd4?! Qd4 21.ed4 b5+/–; 20.ed4?! b5+-) 20...Ke6 (20...Bc3 21.Qb7 Qc7+-) 21.Rd4 Qb6 (21...b5+-) 22.Rb4 Qc6 0–1. cedgar – vaingrecsky (2285), net–chess.com, 2013.

5.a3 a5 6.b5 Bd6 7.Be2 c6 8.bc6 Nc6.

5.a3 c5 6.bc5 Bc5 7.Be2 Nc6 8.0-0 0-0.

5.a3 Bd6 6.Be2 0-0 7.0-0 a5 8.b5 c6.

5.b5 Bd6 6.Ne5 0-0 7.Nd7 Nbd7 8.c4 dc4 9.Bc4 Nb6 10.Be2 Nfd7 11.0-0 Be5 12.d4 Bf6 13.a4 Rc8 14.a5 Nd5 15.Bc4 c6 16.bc6 Rc6 17.Bd5 ed5 18.Qb3 Rc4 19.Qb7 Qc7 20.Qc7+- Rc7 21.Nc3 Rc3?! 22.Bc3 Rc8 1–0. Bonetti,Shane – inpassing, ICC, 2002.

4.a3 g6 5.c4 dc4 6.Bc4 a6 7.d3 (7.Nf3 Nb6 8.Bb3 Bg7=) 7...Bg7= 8.Qb3 0-0 9.Nf3 b5 10.Bd5 Nd5 11.Bg7 Kg7 (11...Nb4 12.ab4 Kg7 13.Nbd2=) 12.Qd5 Nb6 13.Qd8 Rd8 14.d4 (14.Ke2 Bg4=) 14...Bb7 (14...a5 15.ba5 Ra5 16.0-0=) 15.Nbd2 (15.Ke2 a5 16.Nc3 ab4 17.ab4 Na4=) 15...Bf3 16.Nf3 Nd5 (16...a5 17.Kd2=) 17.Rc1 (17.Ne5 Rd6=) 17...Rac8 (better 17...a5!?=+) 18.Ne5+- f6 19.Nc6 Rd7 20.Na5 (20.Ke2 e6+-) 20...f5 (20...e5 21.de5 fe5 22.Nb7=) 21.0-0 (21.Nc6 h6+=) 21...Nf6 (21...Re8 22.Nc6+=) 22.f3 (22.Nb7 Ne4+-) 22...Nd5+= 23.Rfe1 Nb6 24.Rc6 Rd6 25.Rc5 Na4 (25...Nd7 26.Rcc1+=) 26.Rc2+- Nb6 27.Rec1 Exerts pressure on the backward pawn 27...Nd5 (27...h6 28.Kf2+-) 28.Kf2 (28.e4 Nf4 29.d5 Rf8+-) 28...Re6 (28...Re8 29.e4 fe4 30.fe4 Rf8 31.Kg1+-) 29.Re2 (29.Rc6 Rf6+-) 29...g5+= 30.g3 h5 31.Nb3 Rd6 32.e4 White gets the initiative 32...fe4 33.fe4 Nb6 34.e5 Rdd8 (34...Rg6 35.Nc5+=) 35.Nc5+- Rf8 (35...Kf7 36.Ke3+-) 36.Kg2 (better 36.Ke3 Nc4 37.Rc4 bc4 38.Ne6 Kg6 39.Nf8 Rf8 40.Rc2+-) 36...g4? (better 36...Rf5+-) 37.Ne6+- Kg8 38.Nf8 Kf8 39.Rc6 Nc4 40.Ra6 c6 41.a4 (41.Rf2 Kg7+-) 41...ba4 42.Ra4 e6 (42...Nb6 43.Ra6 Nd5 44.Rb2+-) 43.Rf2 (better 43.Ra6 Kf7+-) 43...Ke8 (43...Kg8 44.Rf6 Ne3 45.Kh1 Nf5 46.Re6 Nd4+-) 44.Ra7 (44.Rf6!? Ne3 45.Kg1 Nd5 46.Re6 Kf7+-) 44...Ne3 45.Kh1 (45.Kg1 Nd5+-) 45...Nf5 (45...Rb8 46.Rf6 Rb4 47.Re6 Kd8+-) 46.Rh7 Rd8 (46...Ne7 47.Rh5 Kd8+-) 47.Rh5 (better 47.Ra2 Ng7 48.Rg7+-) 47...Rd4 Do you see the mate threat? 48.Rf4 Rf4 (48...Rd5 49.Rh8 (49.Rg4?! Ne3 50.h3 Ng4 51.hg4 Rb5+-) 49...Kf7 50.Rc8+- (50.Rg4?! Ne3 51.Rh7 Kf8+-)) 49.gf4 g3 (49...Ne3 50.Rg5+-) 50.Kg2 (better 50.Rf5 gh2 51.Rf6+-) 50...gh2 51.Kh2 Ng7 (51...Ne3 52.Rh8 Kf7 53.Rc8+-) 52.Rh8 Kf7 (52...Ke7+-) 53.Rc8 Nf5 54.Rc6 Nd4 55.Rd6 (better 55.Rc4!? Nb5+-) 55...Nb5 56.Rb6 (56.Rb6 Nd4 57.Kg3+-) 1–0. Delboy Smith (1770) – Javid47 (1765), ChessWorld.net, 2016.

4.a4 e5 5.b5 (---> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6 5.a4).

4.b5 e5 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.Bb5 c6 5.Be2 e5 =+.

4.d4 g6 5.c4= c6 (5...dc4 6.Bc4 Nb6 7.Be2=) 6.c5 (6.Nf3 Bg7=) 6...Bg7 7.Nd2 (7.Nf3 b6=) 7...Qc7 (7...b6 8.Ngf3=) 8.f4 (8.Ngf3 b6=) 8...Nf8 (8...b6 9.Qc2=) 9.Bd3 (9.Ngf3 Bf5=) 9...Ng4 10.Qf3 (10.Qe2 Bf5=) 10...Nh6 (10...Bf5 11.Bf5 gf5 12.Ne2=) 11.h3 f6 (11...Bf5 12.Be2=) 12.g4 (12.Ne2 Bf5 13.e4 de4 14.Ne4 0-0-0+=) 12...e5 (12...f5 13.g5 Nf7 14.h4=) 13.fe5 (13.e4 de4 14.Ne4 ef4+=) 13...fe5 (Black gets in control) 14.e4 Be6 15.Qg3 0-0-0 16.de5 Nf7 17.Ngf3 Nd7 (17...de4 18.Be4 Nd7 19.0-0 Nde5 20.Nd4 Rd4 21.Bd4 Nf3 22.Qf3 Bd4 23.Kg2-+) 18.ed5 (18.Nd4 Be5 19.Qe3 Rhe8=+) 18...Bd5 19.Be4 Nde5 20.Ne5 Ne5 21.0-0-0 (21.0-0 Nf3! 22.Rf3 Bb2 23.Qc7 Kc7-/+) 21...Ba2 22.Qa3 Rd2 23.Rd2 Nc4 24.Qa2 Bb2 25.Kc2 Nd2-+ 26.Qe6 Kb8 27.Kb2 Qf4 28.Re1 Rd8 29.Kc2?? Qf2 30.Qe5 Ka8 31.Bd5 Nf3 (32.Re2 Nd4 33.Kb2 Ne2-+) 0–1. Roczniak,Jan – Switala,S, Poland, 1980.

4.Be2 g6 5.Nf3= Bg7 6.0-0 0-0 7.c4 (7.d4 Nb6=) 7...c6 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.a3 Qc7 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.Qc2 Nb6 (9...dc4 10.Qc4 a5 11.Nc3+=) 10.d3 (10.cd5 Nbd5 11.Be5+=) 10...Bf5? (better is 10...dc4!? 11.dc4 Bf5=) 11.cd5+/– Nbd5? (better is 11...Bd7!?+/–) 12.e4+- Ne4? (12...Be6 13.ed5 Bd5+-) 13.Bg7 Kg7 14.de4 Be4 15.Qe4 f5 16.Qh4 h6 17.Nbd2 Nf4 18.Bc4 g5 19.Ng5 Ng6 20.Ne6 Kh7 21.Qd4 Qe5 22.Nf8 Rf8 23.Qe5 Ne5 24.Rfe1 (24...Ng6 25.Nb3+-) 1–0. Olsen,Birger – Methi,Harald, Vadsosjakken op, 1992.

4.f4 b6 5.Nf3 e6 6.b5 Bb7 (6...a6 7.a4=) 7.a4 (7.Be2 a6=) 7...c5 (7...Bb4 8.Be2=) 8.bc6 Bc6 9.Nc3 (9.Bb5 Rc8=) 9...a6 10.Ne2 (10.Be2 Bc5=) 10...Nc5 Exerts pressure on the isolated pawn 11.Ne5 (11.a5 b5=) 11...Bb7 (11...Na4 12.Nc6 Nb2 13.Qb1+=) 12.Nd4= Be7 (12...Bd6 13.Be2=) 13.Be2 Rc8 14.0-0 (14.a5 b5=) 14...0-0 15.Rf3 (15.Qe1 Qc7=) 15...Rc7 (15...Qc7 16.Rf1=+) 16.Rh3= Nce4 (16...Nfe4 17.d3 f6 18.Bg4+=) 17.Bd3 (17.Rf3 Qd6=) 17...Bd6 (17...Bb4 18.c3 Bc5 19.Qe2=) 18.Ng4 Be7 19.Nb3 (19.Nf6 Bf6 (19...Nf6?? 20.Bh7 Nh7 21.Qh5+-) 20.Qe2 Qd7=) 19...Ne8 (better 19...Nd7!?=) 20.Nh6 Kh8? (20...gh6 21.Qg4 Bg5 22.fg5 Qg5 23.Qe2+=) 21.Nf7! Kg8?? (21...Rf7 22.Qh5 Double attack (22.Qh5 Decoy)) 22.Ne5 (better 22.Nd8 Bd8 23.Bd4+-) 22...N8f6+- 23.Nd4 (23.Nd4 Qc8 24.Be4 Ne4 25.d3+-) 1–0. Wiesel,Laszlo – Blum,M, Budapest, 1936.

4.f4 c6 5.Nf3 Qc7 6.c4 e6 7.a3 a5 8.cd5 ed5 9.b5 Bc5 10.Qc2 Bb6 11.bc6 bc6 12.Ne5+= c5 13.Nd7 Bd7 14.Bf6 gf6 15.Nc3 Bc6 16.Rb1 c4 17.Qf5 Qd8 18.g4 0-0 19.Bg2+- d4? 20.Bc6 dc3 21.dc3 (21...Be3 22.Rd1+- (22.Ba8?? Qd2 23.Kf1 Qf2); 21.Be4 Qd2 22.Kf1 Rfb8 23.Qh7 Kf8+/–) 1–0. marus – mantoon, internet, 2001.

4.f4 g6 5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Nbd7).

4.g4 h6 5.h4 e5 6.Nh3 Nb6 7.Rg1 Bd6 8.a3 h5 9.g5 Ng4 10.Nc3 d4 11.Ne4 de3 12.fe3 Bf5 13.Ng3 Bg6 14.Bd3 Qd7 15.Qf3 0-0-0 16.Nf5 Kb8 17.0-0-0 Rhe8 18.Rdf1 Na4 19.Ng7 Nb2 20.Kb2 e4 21.Ne8 ef3 22.Nd6 Qd6 23.Nf4 Bd3 24.Nd3 Ne5 25.Rf2 Nd3 26.cd3 Qd3 27.Rc1 Qe4 28.Rc3 Rd5 29.d4 c6 30.Kc1 Rf5 31.Kd2 Qg4 32.Rc1 Qh4 33.Rcf1 Qg5 34.Kd3 Qg6 35.e4 Rf4 36.Rf3 Qg4 37.Kc4 Rf3 38.Re1 Qf4 39.Rc1 Qf6 40.Kc5 Qe7 41.Kc4 Qd7 42.b5 Qe6 43.Kb4 Qe4 44.Rc5 Qd5 45.bc6 Qd4 46.Ka5 Qc5 47.Ka4 Qc6 48.Ka5 Rf5 49.Kb4 Qc5 50.Kb3 Rf3 51.Kb2 Qc3 52.Ka2 Rf1 53.a4 Rf2 54.Kb1 Qb2 Normal 0-1. FeegLood (2565) - Metamorfos (2305), Rated Bullet game, lichess.org, 2015.

(--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

5.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

6.Bb3 Bf5 7.Nc3 e6 8.a3 a5 9.Nf3 (better is 9.b5!?=+) 9...ab4-/+ 10.ab4 Ra1 11.Ba1 Bb4 12.0-0 Bd3 13.Re1 0-0 14.Bc2 c5 15.Ne5 (15.Na2 Ba5-/+) 15...Ba6 16.Ng4 (16.Nb1 Qd5-/+) 16...Ng4-+ 17.Qg4 f5 (17...Qd2 18.Bh7 Kh7 19.Rd1-+) 18.Qg3?? (better is 18.Qd1-/+) 18…Qd2-+ (19.Rb1 Bc3 (19...Qc2 20.Nd1 Kf7 21.Qc7 Ke8 22.Qb6-+) 20.Bc3 Qc3-+) 0–1. wlittle (2185) – millirem (2000), net–chess.com, 2004.

6.Bb5 c6 7.Be2 =+.

6.Be2 e5 A) 7.Qc2 A1) 7...Bd6 8.Nf3 (8.a3 0-0 9.d4 e4 10.Nc3 Bf5 11.Nb5 a6 12.Nd6 cd6 13.Qd2=+; 8.e4 Bd7 9.b5 0-0 10.f4 ef4 11.e5 Ng4 12.Bg4 Qh4 13.Kf1-/+) 8...Qe7 9.a3 0-0 10.d4 e4 11.Ne5 a5 12.b5 Be6 13.0-0=; A2) 7...Qd6 8.Na3 (8.Nc3 c6 9.a3 a5 10.ba5 Ra5 11.Nf3 Be6 12.d4 ed4 13.Nd4=; 8.a3 a5 9.Nf3 e4 10.Nd4 Nbd5 11.Nc3 Nc3 12.dc3 Qe5 13.Rd1=; 8.b5 Nbd5 9.d4 Nb4 10.Qd2 Ne4 11.Qc1 ed4 12.ed4 Qg6 13.Bf1-/+) 8...c6 9.b5 Bd7 10.Nf3 e4 11.Ne5 Nbd5 12.bc6 Bc6 13.Nb5+=; A3) 7...Nbd7 8.a3 (8.Nf3 Bd6 9.0-0 0-0 10.d3 Re8 11.a3 c5 12.bc5 Nc5 13.d4=; 8.b5 Bd6 9.Nf3 e4 10.Nd4 Nc5 11.0-0 Qe7 12.f3 Qe5 13.f4=) 8...Bd6 9.d4 ed4 10.Bd4 a5 11.b5 Nf8 12.Nf3 Ne6 13.Bb2+=; A4) 7...Nbd5 8.a3 Bd6 9.Nf3 e4 10.Ng5 Bf5 11.Bc4 0-0 12.f3 Nb6 13.0-0=; B) 7.Be5 Bb4 8.Nf3= (8.Qc2 Bd6 9.Nf3 0-0 10.d4 Nbd5 11.0-0 Be6 12.Nbd2 Rc8 13.Ng5=; 8.a3 Bd6 9.Nf3 Be5 10.Ne5 Qd5 11.Nf3 0-0 12.Nc3 Qa5 13.Qb3=) 8...Bd6 9.d4 0-0 10.Qc2 Be6 11.0-0 Nbd5 12.Nbd2 Rc8 13.Ng5=.

6.Be2 e6 A) 7.a3 A1) 7...a5 8.b5 Bd6 9.Nf3 Bd7 10.0-0 0-0 11.Nc3 e5 12.d4 e4 13.Ne5=; A2) 7...c5 8.b5 (8.bc5 Bc5 9.Bf6 Qf6 10.d4 Be7 11.Nd2 0-0 12.Bd3 Qg5 13.Qc2=) 8...Bd7 9.Nf3 c4 10.a4 a6 11.a5 Nbd5 12.b6 Rc8 13.0-0+=; A3) 7...Bd7 8.Nf3 c5 9.bc5 Bc5 10.d4 Be7 11.0-0 Rc8 12.Nc3 Nc4 13.Bc4=; A4) 7...Bd6 8.Nf3 0-0 9.0-0 Bd7 10.d4 Na4 11.Bc3 Qe8 12.Qc2 a5 13.Bd2=; B) 7.Qb3 B1) 7...Bd6 8.f4 (8.Nf3 Qe7 9.a3 e5 10.0-0 a5 11.b5 0-0 12.d4 e4 13.Ne5=) 8...Nbd5 9.a3 a6 10.Nf3 0-0 11.0-0 b6 12.Nc3 Bb7 13.Nd5=; B2) 7...Nbd5 8.a3 (8.b5 Bd6 9.Nf3 0-0 10.Nc3 Nc3 11.Bc3 Nd5 12.0-0 Nc3 13.Qc3=) 8...Bd6 9.Nf3 0-0 10.0-0 a5 11.b5 a4 12.Qc2 Bd7 13.Nc3=; B3) 7...Nfd5 8.a3 (8.b5 a6 9.ba6 ba6 10.Nf3 Bd6 11.Nc3 0-0 12.Nd5 Nd5 13.0-0=) 8...a5 9.b5 Bd6 10.Nf3 0-0 11.0-0 Bd7 12.Nc3 a4 13.Qc2=; B4) 7...Bd7 8.Nc3 (8.Bd4 Bd6 9.Nf3 Qe7 10.Bf6 Qf6 11.d4 Ba4 12.Qb2 Nd5 13.a3=; 8.Bf6 Qf6 9.d4 e5 10.Nf3 ed4 11.Nd4 Be6 12.Qb2 Rd8 13.Nc3=+; 8.b5 c6 9.Nf3 Bd6 10.Be5 Be5 11.Ne5 cb5 12.Bb5 0-0 13.Nd7=; 8.Bf3 Ba4 9.Bf6 Qf6 10.Qc3 Bb4 11.Qf6 gf6 12.Bb7 Rb8 13.Bf3=+) 8...Bd6 9.Nf3 a5 10.ba5 Ra5 11.Nb5 Be7 12.Bd4 Nbd5 13.0-0=; C) 7.b5 C1) 7...Bd6 8.Nf3 (8.d4 0-0 9.Nf3 a6 10.ba6 ba6 11.0-0 Bb7 12.Nc3 Nbd5 13.Rb1=; 8.Qc2 a6 9.e4 e5 10.f4 Nfd7 11.ba6 ba6 12.Nf3 ef4 13.Bg7=) 8...0-0 9.0-0 a6 10.Nc3 e5 11.ba6 ba6 12.Qc2 Qe7 13.d4=; C2) 7...Bd7 8.a4 (8.Be5 c6 9.Nc3 Nfd5 10.Nd5 Nd5 11.Rb1 f6 12.Bg3 Qa5 13.bc6=; 8.Nf3 c6 9.a4 Be7 10.0-0 0-0 11.d4 Rc8 12.Ba3 Nbd5 13.Ne5=; 8.Nc3 Bd6 9.Nf3 0-0 10.0-0 c6 11.a4 Nbd5 12.Nd5 Nd5 13.Be5=) 8...Bd6 9.Nf3 Nbd5 10.0-0 0-0 11.Be5 a6 12.Nc3 ab5 13.ab5=; C3) 7...Nbd5 8.Nf3 (8.Nc3 e5 9.Nd5 Qd5 10.Rc1 Bd6 11.Nf3 e4 12.Bf6 gf6 13.Bc4=; 8.Qc2 Bd7 9.Nf3 c6 10.bc6 Bc6 11.0-0 Rc8 12.Ne5 Nd7 13.Nc6=; 8.Qb3 Bd6 9.Nf3 0-0 10.Nc3 Nc3 11.Qc3 Bd7 12.0-0 c6 13.Qd3=) 8...Bd6 9.Na3 a6 10.ba6 ba6 11.Nc4 0-0 12.Bf6 Nf6 13.Rb1=; C4) 7...a6 8.ba6 (8.Bd4 Nbd7 9.ba6 e5 10.Bc3 b6 11.Bb5 Bd6 12.d4 ed4 13.Bd4=+) 8...ba6 9.Nf3 Rb8 10.0-0 Bd6 11.Nc3 0-0 12.Qc2 Bb7 13.e4=.

6.Be2 Bf5 7.d3 (7.a3 A) 7...e6= 8.Nf3 (8.d3 c6 9.e4 Bg6 10.h4 h6 11.h5 Bh7 12.Nh3 Be7 13.0-0=+) 8...a5 9.b5 Bd6 10.d3 Qd7 11.Bf6 gf6 12.Nc3 c5 13.0-0=; B) 7...a5 8.b5 e6 9.d3 Qd7 10.Nc3 Nfd5 11.e4 Nc3 12.Bc3 Bg6 13.h4=; 7.Nf3 e6 8.a3 a5 9.b5 Bd6 10.d3 Qd7 11.Bf6 gf6 12.Nc3 c5 13.0-0=) 7...e6 (7...e5 8.a3 a5 (8...Bd6 9.e4 Bd7 10.f4 Qe7 11.Nf3 Ng4 12.Qd2 f6 13.h3=) 9.b5= Bd6 10.e4 Bd7 11.f4 Qe7 12.Nf3 Ng4 13.fe5=; 7...c6 8.e4 (8.a3 e6 9.e4 Bg6 10.h4 h6 11.h5 Bh7 12.Nh3 Be7 13.0-0=+; 8.Qd2 e6 9.e4 Bg6 10.Nf3 c5 11.bc5 Bc5 12.0-0 0-0 13.Rc1=; 8.Nf3 e6 9.Qd2 Bg4 10.0-0 Bd6 11.a3 0-0 12.Rc1 Na4 13.Be5=) 8...Bd7 9.Nf3 e6 10.Qb3 Rc8 11.a4 Qe7 12.Bc3 Rd8 13.a5+=) 8.a3= Bg6 (8...c5 9.g4 (9.e4 Bg6 10.Qb3= cb4 11.ab4 Be7 12.Nf3 0-0 13.0-0=) 9...Bg6 10.bc5 Bc5 11.g5 Qd5 12.Bf3 Qg5 13.h4+=) 9.Nf3 Be7 (9...Bd6 10.0-0= a5 11.b5 0-0 12.Ne5 Nfd5 13.Nd2=) 10.0-0 0-0 (10...c6 11.Nc3= a5 12.b5 cb5 13.Nb5+=; 10...c5 11.bc5 Bc5 12.Ne5 0-0 13.Qb3+=) 11.Nh4 (11.Ne5 c5 12.Ng6 fg6 13.Qb3+=) 11...Nfd5 (11...c5 12.Ng6 fg6 13.Qb3+=) 12.Ng6 hg6 (12...fg6 13.Nc3+=) 13.Nd2 (13.Nc3 Nc3 14.Bc3 Nd5+=) 13...Qd7 (13...a5 14.b5+=) 14.d4 (14.Nb3 Na4 15.Qc2 Nb2 16.Qb2 c6+=) 14...Na4 15.Qb3 b5 16.e4 (16.Ne4!?+=) 16...Nf4= (worse 16...Nb2 17.ed5 (worse 17.Qb2 Nf4 18.Nb3 Kh7+=) 17...Na4 18.de6 fe6 19.Bg4 Qd4 20.Qe6 Kh7 21.Qe7 Qg4 22.Qc7+-) 17.Bf3 (17.Rfe1!?=) 17...Rad8=+ (worse 17...Nb2 18.Qb2 a5 19.Nb3 ab4 20.Qd2=) 18.Rfd1 (18.Rad1 Nb2 19.Qb2 Qd4 20.Qd4 Rd4=+) 18...Nb2 (18...Nd3 19.Bc3 Nc3 20.Qc3 Qd4 21.Qd4 Rd4 22.Nb3-/+) 19.Qb2 Qd4 (19...Nd3!? 20.Qc2 Qd4-/+) 20.Qd4= Rd4 21.Nb3 Rd1 22.Rd1 Rd8 23.Rd8 Bd8 24.g3 Nh3 25.Kg2 Ng5 26.Nd4 a6 27.Nc6 Nf3 28.Kf3 Bg5 29.Nb8 Bc1 30.Na6 Ba3 31.Ke3 Kf8 ½–½. Levin,Anatoly – Bromberg,Joshua, US Amateur Team East, Parsippany USA (6), 2005.

6.a3 a5 7.b5 =+.

6.a3 a6 7.Nf3 b5 8.Bb3 (8.Be2 Bb7=) 8...c5=+ 9.bc5 Bc5 10.0-0 0-0 11.d4 Bb6 12.Nc3 Bb7 13.Rc1 Rc8 14.Bc2 (14.Qe2 Ba5=) 14...Qe7 15.e4 (15.Ng5 Rfd8=+) 15...Rc7 (15...b4!? 16.Na2 ba3-/+) 16.e5 Nd5 17.Qd3 g6 (17...f5 18.Nd5 Bd5 19.Bb3=) 18.Ne2 (18.Nd5 Bd5 19.Bb3 Bc6=) 18...Rfc8 19.Bb3 Rc1 20.Rc1 Rc1 21.Bc1 Qd8 22.Bg5 f6 (22...Qf8!? 23.a4 Nb4=) 23.ef6+= N7f6 24.Ne5 Qf8? (24...Qd6 25.a4 ba4 26.Bc4=) 25.Ng6 (better 25.Qh3 Qd6 26.Bf6 Nf6 27.Be6 (27.Qe6?! Qe6 28.Be6 Kf8+=) 27...Kf8 28.Qh6 Ke8 29.Bf7 Kd8 30.Bg6 Qa3 31.Bd3+-) 25...hg6 26.Qg6 (better 26.Bd5 Nd5 27.Qg6 Qg7 28.Qe8 Kh7 29.Qh5 Kg8 30.Qe8 Kh7 31.Qh5 Kg8 32.Qe8=) 26...Qg7-+ 27.Qh6 Qh6 28.Bh6 Kf7 29.Be3? (better 29.Kf1-+) 29...Ne3 30.fe3 Bd5 (better 30...Ng4 31.Nf4 Bc8 32.Kh1 Ne3 33.d5 ed5 34.Nd5 Nd5 35.Bd5 Kf6 36.h3-+) 31.Bc2? (31.Bd5 ed5 32.h3 Bc7-+) 31...Ne4 (better 31...Ng4-+) 32.g4 (32.Be4 Be4 33.Nc3 Bg6-+) 32...Ba5 33.h4 (33.Be4 Be4 34.Kf2 Bc7-+) 33...Bd2 34.Be4 (34.Kg2 Nd6 35.Kf2-+) 34...Be4 (better 34...Be3 35.Kf1 Be4-+) 35.Kf2-/+ Bd3 36.Nf4 Bc2 37.h5 (37.Ne2 Ba5-+) 37...Bc1 38.g5 Ba3 39.h6 1–0. GuestCLQG – GuestKWVN, freechess.org, 2017.

6.a3 b6 7.Nf3= Bb7 8.Nc3 (8.0-0 c5=) 8...c5 9.b5 g6 (9...Bd6 10.0-0=) 10.a4 (10.d3 Bg7+=) 10...Bg7 (10...Bf3 11.Qf3 Ne5=) 11.Qc2 (11.d3!?=) 11...Bf3=+ 12.gf3 0-0 (12...Ne5 13.Be2=+) 13.h4 (13.f4!?=) 13...Ne5-/+ 14.Be2 h5 (14...c4 15.Na2 Nd3 16.Bd3 cd3 17.Qb3=+) 15.Rg1 (15.f4 Neg4=) 15...Rc8 Black plans c4 (15...c4=+) 16.0-0-0 (better 16.f4 Neg4 17.d3=) 16...c4-/+ 17.Kb1 Nd3 18.Rg2 (18.Bd3 cd3 19.Qb3 Qc7-/+) 18...Nd5-+ 19.Nd5? (better 19.Ba3 Re8 20.Nd5 Qd5 21.Rdg1-+) 19...Nb2 (19...Bb2?! 20.Bd3 cd3 21.Qd3-/+; 19...ed5?! 20.Bg7 Kg7 21.f4=) 20.Nf4 (20.Nc3 Nd1 21.Nd1 Qh4-+) 20...Nd1 21.Bd1 Qf6 22.Qa2 Rfd8 23.Be2 (23.Kc1 e5 24.Nh3 c3-+) 23...Qh4 (23...Rd2 24.Nd5 Rb2 25.Kc1 ed5 26.Qa3 Re2 27.Rg3-+) 24.Bc4 (24.Qc2 g5 25.Ne6 fe6-+) 24...Qh1 25.Kc2 e5 (25...Qe1 26.d4 Bd4 27.Nd3 Qc3 28.Kd1 Rc4 29.Ke2 Be3 30.fe3 Rd3 31.Rg6 fg6 32.a5 Re3 33.Kf1 Rf3 34.Qf2 Qd2 35.Kg2 Rf2 36.Kg3 Qe3) 26.Rg6 (26.Ng6 Qg2 27.Ne7 Kf8 28.Nc8 Rc8-+) 26...ef4 27.Rc6 Qf3 28.Bf7 Kh8 29.Qc4 (29.Qd5 Rc6 30.bc6 Rd5 31.Bd5 Qd5 32.c7 Qc4 33.Kd1 Qa4 34.Ke1-+) 29...Rc6 30.bc6 fe3 (better 30...Qf2 31.Qd3 Rd3 32.Kd3 fe3-+) 31.fe3 Qf6 (better 31...Qg2 32.Qb4 Qc6 33.Bc4 Qe4 34.Kd1 Qe3-+) 32.c7 (32.Kd1 Qa1 33.Ke2-+) 32...Qb2 33.Kd1 Qd2 0–1. combijack (1880) – borisrub (1655), gameknot.com, 2013.

6.a3 Bd6 7.Nf3 Nb6 8.Bb3 (8.Be2 0-0=) 8...Bd7 9.0-0 Ng4 (9...a5!?=+) 10.Bg7+= Rg8 11.Bb2 (11.Bc3 Nh2 12.Nh2 Bh2 13.Kh2 Qh4 14.Kg1 Qh3-+) 11...Bc6 (11...Nh2 12.Nh2 Bh2 13.Kh2 Qh4 14.Kg1 Qh3-+) 12.g3+= Qe7 (12...a5 13.ba5 Ra5 14.d3+=) 13.Nc3 (13.h3 Nf6 14.Nd4 Bd5+=) 13...0-0-0 (13...Qf6 14.e4 Be4 15.Ne4 Qb2+-) 14.b5+- Bf3 (14...Bd7 15.a4+-) 15.Qf3 Nh2? (better 15...Ne5 16.Qe2 Kb8+-) 16.Kh2+- Qh4 (16...h5 17.Ne4 (worse 17.Qh5 Rh8 18.Qh8 Rh8 19.Kg2 Rg8=+) 17...f5 18.Nd6 Rd6 19.e4+-) 17.Kg2 Rg3 (17...Qe7+-) 18.fg3 Rg8 (18...Qg5 19.a4+-) 19.Ne4 Be7 (19...Nd7 20.Rh1 Qe7 21.Rh7+-) 20.Qf4 Qh5 (20...Qf4 21.Rf4 Nd5 22.Rf7+-) 21.Qf7 Qe2 22.Rf2 (22.Rf2 Qd3 23.Be6 Kb8 24.Qg8 Qd8 25.Qd8 Bd8 26.Rf8+-) 1–0. DEFFM – GuestNVGZ, freechess.org, 2018.

6.a3 Be7 7.Nc3 (7.Nf3 a5=) 7...0-0 (7...a5 8.ba5 0-0 9.a6=) 8.Nf3 b6 (8...Nb6 9.Be2=) 9.Rc1 (9.d4 Bb7=) 9...Bb7 10.d4 a5 (10...c5 11.bc5 bc5 12.dc5 Nc5 13.0-0=) 11.b5 Rc8 (11...c5 12.0-0=) 12.Qe2 (12.d5 Nc5 13.de6 Ne6=) 12...c6 (12...c5 13.bc6 Bc6 14.e4=) 13.0-0+= c5 14.Rfd1 Rc7 (14...Bf3 15.Qf3 cd4 16.Rd4=) 15.dc5 (15.d5 ed5 16.Nd5 Bd5 17.Bd5 Nd5 18.Rd5 Bf6+=) 15...Bc5 16.Na4 Qa8 (16...Qe7 17.Nc5 Rc5 18.Nd4+=) 17.Nc5 (17.Ne5 Bg2 18.Nd7 Rd7 19.Rd7 Bh3+-) 17...Rc5 18.Bd4 Rc7 (18...Bf3 19.Qf3 Qf3 20.gf3 Rc7+=) 19.Qb2 (19.Bd3!? Bf3 20.Qf3 Qf3 21.gf3 Rc1 22.Rc1=) 19...Bf3=+ 20.gf3 Qf3 21.Be2 Qb7 22.f3 Rfc8 23.Rc7 Qc7 24.Bd3?? e5-+ 25.Bf5 ed4 26.Qd4 Rd8 27.Rd2 Kf8 28.Rc2 Nc5 29.Qb2 Qd6 30.Rc1 Qd2 31.Qd2 Rd2 32.e4 g6 33.Bh3 Ke7 34.Bf1 Nh5 35.Bc4 Nf4 36.Bf1 Nfd3 37.Bd3 Rd3 38.Kg2 0–1. Hoelldorfer,August (1625) – Schuberth,Thomas (1620), Bayern–ch Seniors op, 1997.

6.Qb3 =+.

6.b5 Nb6 7.Be2 Nbd5 8.Nc3 (8.Nf3=) 8...g6 (8...e5!?=) 9.Nf3 Bg7 (9...Nc3 10.Bc3 Bd6 11.Qa4+=) 10.0-0 (10.Nd5 ed5 11.Rc1 Bd7+-) 10...0-0 11.Qb3 (11.Rc1 Ne4+=) 11...b6 (11...a6 12.ba6 b6 13.Qa4+=) 12.Rad1 (12.Nd5 Qd5 13.Rfc1 Qb3 14.ab3 Nd5+-) 12...Bb7 (12...a6 13.Qa3+=) 13.Ba3 (13.Qa4 Re8+=) 13...Re8= 14.Ne5 (14.d4 a6=) 14...Ne7 (14...Nc3 15.dc3 Nd5 16.Nf3 Nc3 17.Rd8 Ne2 18.Kh1 Rad8 19.Bb2 Bf3 20.Bg7+-) 15.Bc4 (15.d4 a6+=) 15...Nfd5 16.f4 (16.d4 Nc3 17.Qc3 a6 18.ba6 Ba6 19.Ba6 Ra6 20.Be7 Qe7=) 16...Nf5 17.Ne4 (17.Rf2 Nf6=) 17...f6 (17...a6 18.Bb2=) 18.Nc6+= Bc6 (18...Qd7 19.Nc3 Nc3 20.dc3+= (worse 20.Qc3 Bc6 21.bc6 Qc6=+)) 19.bc6+- Nd6? (better 19...Kh8+-) 20.Bd6+- cd6 (20...f5 21.Ng5 Qd6 22.Ne6 Re6 23.Bd5+-) 21.Bd5 ed5 22.Qd5 Kh8 (22...Kf8 23.Ng5! (23.Nd6?! Ke7 24.Qf7 Kd6 25.Qg7 Qe7+-; 23.Qd6?! Qd6 24.Nd6 Re6+-) 23...Qc7 24.Rc1+- (24.Nh7?! Ke7+-)) 23.Nd6 h5 (23...Re7 24.Nf7 Rf7 25.Qf7 f5+-) 24.Nf7 (24.Nf7 Kh7 25.Nd8 Red8 26.Qf3+-) 1–0. DEFFM – GuestVDQF, freechess.org, 2018.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Nbd7).

5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

5.a3 a5 =+.

5.Qb3 Nb6 6.Be5+= Be7 7.c5 Nbd7 8.Bb2 0-0 9.Nf3 a5 10.a3 ab4 11.ab4 Ra1 12.Ba1 Re8 13.Be2 b6 14.c6 Nb8 15.b5 Be6 16.0-0 Ne4 17.Bd4 Bf6 18.d3 Bd4 19.Nd4 (19.de4 de4 20.Bc4 Bc4 21.Qc4 ef3 22.ed4 fg2=) 19...Nc5 (19...Nf6 20.Nd2+-) 20.Qc2+- Qg5 (20...Bc8 21.Nc3+-) 21.Nc3 Bh3 (21...h6+-) 22.Bf3 f5?! (22...Be6+-) 23.Nd5 Re5 1–0. GuestBHHG – GuestGTJS, freechess.org, 2018.

5.b5 Bd6 6.Nf3 0-0 7.Be2 dc4 8.Bc4 Nb6 9.Be2 Bg4 10.0-0 e4 11.Nd4 Be2 12.Ne2 Nc4 13.Bd4 a6 14.a4 ab5 15.ab5 Ra1 16.Ba1 Ne5 17.Be5 Be5 18.Nbc3 Qd6 19.g3 Rd8 20.Qc2 Qd2 21.Qb3 Qd7 22.Rd1 Qe8 23.Rd8 Qd8 24.Qc4 h6 25.Kg2 Bc3 26.Nc3 Qe7 27.h3 b6 28.Qa4 Kh7 29.g4 g6 30.Qd4 Qe6 31.Qd8 Qe5 32.Qd2 h5 33.gh5 Nh5 34.Nd5 Nf6 35.Nf4 Qd6 36.Qc2 Qe5 37.h4 Nh5 38.Nh5 gh5 39.Qc4 Kg7 40.Qc6 f5 41.Qd7 Kg6 42.Qc8 Qg7 43.Qe6 Kh7 44.Kh2 Qg4 45.Qf7 Qg7 0–1. brother – bororo75 (1755), kurnik, 2013.

5.c5 c6 6.Nf3 Qc7 7.d4 e4 8.Nfd2 Be7 9.Nc3 0-0 10.Qc2 Ne8 11.0-0-0 f5 12.a4 a5 13.b5 cb5 14.Nb5 Qc6 15.g3 b6 16.Nb3 bc5 17.dc5 Nc5 18.N3d4 Qb6 19.Ba3 Bd7 20.Kb1 Rc8 21.Qb2 Na4 22.Qa2 Nc3 0-1. James_Flynn (2065) - blindchess32 (2255), Rated Bullet game, lichess.org.

5.c5 c6 6.Nf3 e4 7.Nd4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Ne5 11.Nc3 Bg4 12.Qb3 Nd3 (better is 12...b6!? 13.cb6 Qb6+=) 13.Bd3+= ed3 14.f3 Bh5 15.0-0 Be7 16.e4 0-0 17.ed5 Nd5 18.Nd5 Qd5 19.Qd5 (worse is 19.Qd3 Bg6 20.Qe3 Re8+/–) 19...cd5 20.Nf5 Bf6 (better is 20...Bg5 21.Bg7 Ra8+-) 21.Bf6 gf6 22.Ne7 Kg7 23.Nd5 Rd8 24.Ne3 Bg6 25.Rc1 Rd4 26.Rc4 Rd8 27.b5 White intends c6 27...Kf8 28.c6 bc6 29.Rc6 Ke7 30.b6 Rb8 31.Nd5 Kd7 32.Rf6 Rb7 33.h4 h5 34.Kf2 Rb8 35.Ke3 Re8 36.Kd4 Kc8 37.Nf4 Rd8 38.Kc5 Kb7 39.Ng6 fg6 40.Rg6 Rc8 41.Kb5 (better is 41.Kd4 Rd8 42.Ke4 Re8 43.Kd3 Rd8 44.Ke3 Re8 45.Kf4 Rd8+-) 41...Rc2 42.Rg7 Kb8 43.g4 Rd2 44.Kc4 hg4 45.fg4 Rd1 46.Kc3 Rb1 47.Kd3 Rb6 48.h5 Rh6 49.Ke4 Kc8 50.Kf5 Kd8 51.Rg6 (better is 51.Kg5 Rb6 52.h6 Rb5 53.Kg6 Rb6 54.Kh5+-) 51...Rh7 (51...Rh8 52.h6 Ke8 53.g5+-) 52.Kf6 (better is 52.Rg8 Ke7 53.Kg6 Rf7+-) 52...Ke8 (52...Rh8+-) 53.Rg8 Kd7 54.Rg7 Rg7 55.Kg7 Ke7 56.h6 1–0. combijack (1765) – alibekof (1655), gameknot.com, 2009.

5.cd5 Bb4 6.Be5 0-0 7.a3 Ne5 (worse 7...Nd5 8.Bg7 Kg7 9.ab4+=) 8.ab4 Nd5=+.

5.cd5 Bb4 6.Be5 0-0 7.Bb2 Nd5 8.Nf3 Re8 (8...Bd6 9.Nc3 Nc3 10.Bc3=+) 9.Be2 Qe7 (9...N7f6 10.0-0=+) 10.0-0 N7f6 11.Ne5 (11.Nc3 Bg4=+) 11...Bf5 12.Bc4 c6 13.Qf3 g6 (13...Qe6 14.d4=+) 14.d4= Rad8 (14...Ne4 15.Rd1=) 15.a3 Ba5 16.Rc1 Ne4 17.Bd3 (17.Bd5 Rd5 18.Nc3 Bc3 19.Bc3 c5=) 17...Ng5 18.Qe2 (18.Qd1 Bd3 19.Qd3 Bc7=+) 18...Bd3=+ 19.Nd3 Ne4 20.a4 Qh4 21.Ra3 (21.Ne5 Bc7=+) 21...f6 (21...Bc7 22.h3=+) 22.Rb3= Rd7 23.Ba3 Rf7 (23...Bc7 24.g3 Qh6 25.Nd2= (worse 25.Rb7 Bg3 26.hg3 Rb7-+)) 24.h3 (24.Qb2 Nb6=) 24...Ng5 (24...Kg7 25.Nc5 Nc5 26.Rc5=) 25.Qg4 (25.Qc2 Rd8=) 25...Qh6 (25...Qg4 26.hg4 Ne4 27.Nc5 Nc5 28.Bc5=) 26.Qe2 Re4 (26...Qh4 27.Qc2=) 27.Qf1 (27.Bd6 Rd7 28.Bb8=) 27...Bc7 (27...Qh4 28.Bd6 Re8 29.Nc5=) 28.Re1 (28.Rb7 Bh2 29.Kh2 Rb7 30.Nc5+-) 28...Rg4-/+ 29.Kh1 (29.Rb7?? Nh3 30.Kh1 Ng5 31.Kg1 Qh2) 29...Rh4 30.Nf4 Kg7 (30...Bf4 31.ef4 Rf4 32.Re8 Kg7 33.Rb7 Rb7 34.Bf8 Kf7 35.Bh6 Ke8 36.Bg5 fg5 37.Qe1 Kd7 38.Nd2 Rd4 39.Ne4-/+) 31.Nd2 (31.g3 Nf4 (worse 31...Bf4 32.gh4 Nf3 33.ef4 Ne1 34.Qe1+-) 32.gh4 Nfh3 33.Bf8 Kf8-+) 31...Nf4 (31...Bf4 32.ef4 Rf4 33.Nc4 Rd4 34.Bc5=+) 32.ef4 Bf4 (32...Rf4 33.Rb7 Rd4 34.Bc1=+) 33.Nc4=+ Qh5 (33...b6 34.a5 b5 35.Ne3-/+) 34.a5 Bc7 35.Bc5 Ne4 36.Ba7 Qd5 Attacks the isolani on a5 37.Qe2 (37.Ra1 Rf4 38.Ra2 Nd6-/+) 37...c5 (37...Nd6 38.Nd6 Qd6 39.Rg3 Ba5 40.Rb1-/+) 38.Rd1 (38.Re3 f5 (38...cd4?! 39.Re4 Re4 40.Qe4 Qc4 41.Bd4=) 39.Kg1 cd4=+) 38...Ng5 (38...Nd6 39.Nd6 Qd6 40.g3 Qd5 41.Qf3 Qf3 42.Rf3 Rd4 43.Rd4 cd4 44.Bd4 Ba5 45.Kg2-/+) 39.Kg1 Rd4 40.Rd4 cd4 41.Bb6 Bb6 42.ab6 Ne4 43.Ra3 Rd7 44.Nd2 (44.Qd3!?-/+) 44...Nd2-+ 45.Qd2 d3 (45...Qb5 46.Qe1 Qb6 47.Ra8-+) 46.Ra1 (46.h4 Qb5-+) 46...Qd4 (46...Qb5 47.Qe3-+) 47.Rc1 (47.Rb1 Re7 48.Rb4 Qa1 49.Kh2 Qe5 50.g3 Qd5-+) 47...Qb6 48.h4 (48.Rc8 Qe6-+) 48...Qd4 49.h5 gh5 50.Re1 b5 0–1. Wantoch_Rekowski,Jacek (2305) – Kubicki,Tadeusz (2310), Roman Kaminski Memorial Poland, 2006.

5.cd5 Bb4 6.Be5 0-0 7.Bc3 Nd5 8.Bb4 Nb4 9.d4 =+.

5.cd5 Nd5 6.a3 a5 7.Bc4 (7.b5 Bd6=+) 7...N5b6 (7...N7b6 8.ba5 Nc4 9.Qa4 c6 10.Qc4-/+) 8.Bb3=+ ab4 9.ab4 Ra1 10.Ba1 Bb4 (10...Qf6-/+) 11.Nc3 (11.Bf7!? Kf7 12.Qb3 Ke8 13.Qb4=+) 11...0-0 (11...Nc5 12.Bc2-/+) 12.Nf3 (12.Ne4 Nf6 13.Nf6 Qf6-/+) 12...Qe7 (12...Bc3 13.dc3 e4 14.Nd4-/+) 13.0-0 (13.Ne4 Kh8-/+) 13...Nc5 (13...e4 14.Nd4 Nf6-/+) 14.Re1 (better is 14.Bc2!? e4 15.Nd4-/+) 14...Nb3 (14...Bg4 15.Bc2 e4 16.h3-+) 15.Qb3 Be6 (15...e4 16.Nd4-+) 16.Qb2 (16.Qb1 f6-/+) 16...Nc4 (16...f6 17.Rb1 Ra8 18.Qc2-+) 17.Qc2 g6 (17...f6 18.Rd1-+) 18.d3 (better is 18.d4-/+) 18...Nb6 (18...Na3 19.Qe2-/+) 19.Rb1 (19.Ne5 Ra8 20.Bb2 Ra5=) 19...Bc3 (19...f6 20.d4-/+) 20.Qc3 (better is 20.Bc3!? Nd5 21.Ne5= (< 21.Rb7 Qc5 22.Rb3 Ne3 23.fe3 Qe3 24.Kh1 Bb3 25.Qb3 Qd3-/+)) 20...f6=+ 21.d4 e4-/+ 22.Nh4? Nd5 23.Qc2 c6?? 24.Qe4= Nc3?? 25.Qd3 Nb1-+ (Black gets in control) 26.Qb1 Bd5 27.Qd3 Qe4 28.Qe4 Be4 29.f3 Bd3 30.g4 Ra8 31.Bc3 Ra2 32.Ng2 b5 33.Nf4 Bc4 34.e4 Rc2 35.Be1 Rb2 36.d5 cd5 37.ed5 b4 38.d6 Bb5 39.Nd5-/+ Kf7 40.Nc7?? b3 41.Nb5-/+ Rb1 42.Kf2 b2 43.Nc3?? Ra1 44.Bd2 b1Q?? 45.Nb1=+ Rb1 46.d7? Ke7-+ 47.f4 Kd7 48.g5 fg5 49.fg5 Rb2 50.Ke3 Ke6 51.h4?? Kf5 52.Ba5 Rb3 (53.Kd4 Rh3-+) 0–1. tambor17 – boneheadplay19, Live Game Caissa's Web, 2005.

5.cd5 Nd5 6.a3 Bd6 7.Bc4 N5b6 8.Bb3 0-0 9.Nf3? (9.d4 a5=+) 9...c5 (better is 9...e4!? 10.Ng1 Ne5 11.Be5 Be5-+) 10.bc5 Nc5 11.Ba2?? (better is 11.d3-/+) 11...e4 12.Nd4 (12.0-0 Bg4 13.h3 ef3 14.Bd4-+) 12...Be5 (better is 12...Nd3 13.Kf1 Nb2-+) 13.0-0 Nd3 14.Bc3 Bd7 15.a4 a5 16.Bb3 Qc7 17.Bc2 (17.f4 Bf6-/+) 17...Nc5 (17...Bh2!? 18.Kh1 Bd6-+) 18.h3 Kh8 19.Kh1 Qc8 (19...Nd5 20.Qh5 f5 21.f4-/+) 20.Qh5 Bf6 (20...f5!?-/+) 21.Ne2 Nd3 (21...Qc6 22.f3 Nba4 23.Ra4=) 22.Bf6 gf6 (22...Qc2 23.Nbc3 Bc6 24.Nd4+-) 23.Qh4 (23.Nbc3 Qc5 24.Qh4 Qg5 25.Qe4 Bc6+/–) 23...Rg8 (better is 23...Qc2 24.Qf6 Kg8 25.Qb6 Qc6 (25...Ba4? 26.Nbc3 Qb3 27.Na4 Qb6 28.Nb6+-) 26.Qc6 Bc6+=) 24.Qf6 Rg7 25.Bd3 ed3 26.Nf4 (better is 26.Ng3 Qc6 27.Qd4 Bh3 28.e4+=) 26...Bf5?? (26...Nd5 27.Qd6 Nf4 28.Qf4 Bh3-+) 27.Nh5+- Qg8 28.Ng7 (better is 28.Qf5 Rg6 29.Nc3+-) 28...Qg7 29.Qg7 Kg7 30.Nc3 Nd7 (30...Nc4 31.Ra2 Rc8+-) 31.Rab1 b6 32.Rb5 Be6 33.f4 f5 34.e4 fe4 35.Ne4 Bc4 36.Rg5 Kh8 37.Nd6 (37...Bb3 38.Ra1+-) 1–0. revbodio1 – Bennyhill, Live Game Caissa's Web, 2004.

5.cd5 Nd5 6.Qb3 Nb4!? 7.d4 ed4 8.Bd4 Nc5 9.Bc5 Bc5 -/+.

5.cd5 Nd5 6.Qb3 N5f6 7.Bc4 Qe7 8.Nf3 g6?? (better is 8...c6=+) 9.Ng5+- Bg7 10.Bf7 Kf8 11.Ne6 Kf7 12.Nc7 Kf8 13.Na8 Nb6 (13...Qd6 14.Qc3 Qc6 15.0-0+-) 14.Nb6 ab6 15.d4 Be6 16.Qa4 Kf7 17.de5 Ng4 18.0-0 Rf8 (18...Rd8 19.b5 Ne5 20.Bd4+-) 19.Nd2 Ne5 20.Qc2 Ng4 (20...Kg8 21.a4+-) 21.Bg7 Kg7 22.Nf3 (22.a3 Kg8+-) 22...Nf6 (22...Rf3 23.gf3 Nh2 24.Qc3 (24.Kh2?! Qh4 25.Kg1 Qg5 26.Kh1 Qh4 27.Kg1 Qg5 28.Kh2 Qh4 29.Kg1=) 24...Kg8 25.Rfd1 (25.Kh2?! Qh4 26.Kg1 Qg5 27.Kh1 Qh5 28.Kg2 Qg5 29.Kh2 Qh4 30.Kg1 Qg5 31.Kh2 Qh4=) 25...Nf3 26.Kf1+-) 23.Nd4 Bd5 24.Rac1 Qe5 (24...Qb4 25.a4+-) 25.Qc7 Kg8 (25...Qc7 26.Rc7 Rf7 27.Rf7 Kf7+-) 1–0. radica – chaaaarge, Live Game Caissa's Web, 2004.

5.a3 c5 6.Qb3 b6 (6...Qb6 7.Nf3=+) 7.d4 (7.Nf3 Bb7=) 7...Qc7 (7...Bd6 8.Nf3=+) 8.Nf3 Bb7 9.Nc3 Bd6 (9...cd4 10.Nb5 Qd8 11.Nbd4= (< 11.Bd4 a6-/+)) 10.h3 (10.Nb5 Qb8+=) 10...0-0 (10...a6!?=) 11.Nb5+= Qb8 12.Be2 (12.Nd6 Qd6 13.dc5 bc5 14.Bf6 Nf6 15.bc5 Qc7=) 12...Bc6 (12...cd4 13.Nbd4 a6 14.Rd1=) 13.Nd6 Qd6 14.Ne5 (14.dc5 bc5 15.Qc3 cb4 16.ab4 dc4 17.Qc4 Rfb8 18.Bf6 Nf6=+) 14...dc4= 15.Nc4 Qc7 16.Rg1 (16.0-0!?=) 16...Bd5 (16...Qh2 17.Kf1-/+) 17.Qd3 (17.bc5 Qh2 18.0-0-0 bc5 19.dc5 Rfc8-/+) 17...Rfd8 (17...Qh2 18.Kf1-/+) 18.Nd2 (18.dc5 bc5 19.g3 cb4 20.ab4 Rab8-/+) 18...Qb7 (18...Qh2 19.Kf1-/+) 19.Bf3 (19.dc5 bc5 20.Qb5 Qc7=+) 19...Bf3 20.Nf3 (20.gf3 e5=+) 20...cb4 (20...Rac8 21.Qe2-/+) 21.ab4=+ Rac8 22.Ke2 Nd5 23.Qb3 Rc7 24.Rgc1= Rdc8 25.Kf1 N5f6 26.Nd2 Qd5 27.Qd1 Qb5=+ 28.Kg1 Rc1 29.Bc1 Rc7 30.Rb1 Nd5-/+ 31.Qf1 Qf1 32.Kf1 Nb4! 33.Rb4 Rc1 34.Ke2 Rc7 35.Ne4 Kf8 36.Nd6 Rc2-+ 37.Kf3 Ra2 38.Rc4 a5 39.Nb5 Ke7-/+ 40.Rc7 Rb2 41.Na3 Kd6 42.Ra7 Kc6 43.Nc4-/+ Rb4 44.Na5? ba5-+ 45.Ra5 Nf6 46.Ra7 Rb7 47.Ra6 Kb5 48.Ra1 Nd5 49.Rb1 Kc6 50.Rc1 Kb5?? 51.Rb1 Nb4 52.Ra1 Rc7 53.Ra8 g6 54.Rb8 Ka4 55.Ra8 Kb3 56.Rb8 Kc3 57.Ra8 Kd2 58.Ra4 Nd5 59.Ra2 Rc2 60.Ra7 Rc7?? 61.Rb7?? Kd3 62.Rb3 Rc3 63.Rb7 Rc1 ½–½. Dessing,Bastiaan – Langerak,Wouter, NED–ch U14 Rijswijk, 2000.

5.a3 c5 6.bc5 Bc5 7.d4 Be7=.

5.a3 c5 6.cd5 Nd5 7.b5 (7.bc5 Nc5 8.Nf3 Bd7=) 7...N7f6 8.Nf3 b6 (8...Be7 9.d4=) 9.Ne5 (9.d4 a6=) 9...Bb7 (9...Bd6 10.d4=) 10.Be2 (10.Qf3 Bd6=) 10...Bd6 11.f4 (11.d4 0-0=) 11...0-0=+ 12.0-0 Qe8 (12...a6 13.Qc2=+) 13.a4 (13.Qc2 a6 14.e4 Ne7+=) 13...Nd7 (13...Rd8 14.Qc1=) 14.Nc4 White plans a5 14...Bc7 (14...Qe7 15.a5=) 15.Bf3 (15.a5 N7f6+=) 15...Rd8 (15...e5 16.Nc3 Nc3 17.dc3=) 16.a5+= N7f6 (16...f6 17.ab6 ab6 18.Ra7+=) 17.ab6+- ab6 18.Ra7 Rb8 19.Bf6 gf6 20.Nc3 (20.Nba3 Qc8+-) 20...Nc3+= 21.dc3 Bf3 22.Qf3 (worse 22.gf3 Qb5 23.Nd2 Qc6=+) 22...Qb5 23.Nd2 (worse 23.Rc7 Qc4 24.e4 Rbd8=) 23...Rbc8 24.Qg4 (24.Ne4 Kg7+=) 24...Kh8+= 25.Qh4 Bd8 (better 25...Kg7+=) 26.Qh6+- Qe8 (26...Kg8 27.Rf3 Qd3 28.f5 Qf5 29.Rf5 ef5 30.Nf3+-) 27.Ne4 Rg8 28.Nd6 (28.Nd6 Rg6 29.Qg6 fg6 30.Ne8+- (30.Nc8?! Qc6 31.Rd1 Qc8=); 28.Nf6?! Bf6 29.Qf6 Rg7+-) 1–0. DEFFM – Reckert, freechess.org, 2018.

5.a3 Be7 6.Nf3 0-0 7.Qc2 c5 8.b5 Qc7 9.d3 b6 10.Nbd2 Bb7 11.Be2 Rad8 12.Rc1 Qb8 13.Ba1 Ne8 14.Nb3 Bf6 15.d4 cd4 16.Bd4 e5 17.Bc3 dc4 18.Bc4 Nd6 19.Bb4 Rfe8 20.0-0 Nc4 21.Qc4 Qa8 22.Qg4 Bd5 23.Nbd2 Nf8 24.Ng5 Bg5 25.Qg5 h6 26.Qg3 Ng6 27.Nc4 Bc4 28.Rc4 Qd5 29.Rc7 Rd7 30.Rd7 Qd7 31.a4 Rc8 32.Qf3 Rc4 33.Rb1 e4 34.Qe2 Ne5 35.Rd1 Nd3 36.Be1 Ra4 37.Qc2 Qb5 38.Qc8 Kh7 0–1. Coquelle,Arnaud – Dehesdin,Wilfried (2090), La Fere, 2002.

5.Qb3 Be7 6.Nf3 0-0 7.Be2 dc4 8.Bc4 c5 9.b5 Nb6 10.Be2 Qd5 11.Nc3 (11.Qc2 Rd8=) 11...Qb3=+ 12.ab3 Rd8 13.0-0 Bd7 (13...Bd6 14.Na4 Nbd7 15.Bf6 gf6 16.Rfd1=) 14.Rfd1 Nbd5 15.Nd5 Nd5 16.d4 Be8 17.Rac1 cd4 18.Nd4 (18.Bd4 f6=) 18...Bf6 19.h3 Rac8 20.Bc4 Nb6 21.f4 Nc4 22.bc4 Be7 (22...a6 23.ba6 ba6 24.Kf2=) 23.Kf2 Bc5 24.Ke2 a5 25.Nf3 (25.ba6 ba6 26.Rd3 a5+=) 25...Rd1 26.Rd1 Bb4 27.Rc1 a4 28.Nd4 (28.Kd3 a3 29.Bc3 Bd6=+) 28...a3 29.Ba1 Kf8 (29...f6 30.Ne6 Bb5 31.Kd3=+) 30.Kd3 Bd7 31.Nb3 f6 32.Bc3 (32.Bd4 Be8=+) 32...Be7 (32...Bc3 33.Rc3 a2 34.Kc2=+) 33.b6 (33.Bd4!?=+) 33...Bc6-/+ 34.g4 Rd8 35.Ke2 Bg2 36.h4 Bh3 (36...Ra8!?-/+) 37.Rg1= f5 38.gf5 Bf5 (38...ef5!? 39.Bg7 Ke8=) 39.Bg7+= (39.Rg7 Rd3 40.Re7 Ke7 41.Bb4 Ke8-+) 39...Kf7 40.Bd4 h5 41.Rg7 (better 41.Ra1!?+=) 41...Kf8=+ 42.Rg1 Bh4 (42...Rc8 43.c5 Bg4 44.Kd3 Ra8+=) 43.Bc5 (better 43.Nc5 Bg4 44.Kd3+/-) 43...Kf7 44.Nd4 (44.Ba3 Bg4 45.Rg4 hg4-/+) 44...Bg4 (44...a2 45.Ra1 Rg8 46.Nf5 ef5 47.Bd4-+) 45.Kd3 a2 46.Ra1 Ra8 47.Nb5 Ra4 (47...Ra6 48.Nc3=) 48.Nc3 (48.Nd6!? Kg6 49.Nb7+/-) 48...Bf6= 49.Bd4 (worse 49.Ra2 Ra2 50.Na2 h4=) 49...Bd4 50.Kd4 Ra3 51.Ra2 Ra2 52.Na2 h4 53.Nc1 h3 54.Nd3 h2 55.Nf2 Ke7 56.Ke5 Kd7 57.e4 White plans f5 (57.c5 Bf3=+) 57...Bf3 (57...Kc6 58.f5 ef5 59.ef5 Bf5 60.Kf5 Kb6 61.Ke4=) 58.f5=+ ef5 59.ef5 h1Q 60.Nh1 Bh1 61.Kf6 (61.Kd4 Kd6-/+) 61…Be4 0-1. Mely (2305) - Sinuhe (2240), ChessWorld.net, 2016.

5.c5 a5 6.a3 b6 (better 6...ab4!? 7.ab4 Ra1 8.Ba1 Be7=) 7.c6+/- Nb8 8.b5 a4 (8...Bd6 9.Nf3+/-) 9.Nc3+/- e5 10.Na4 Bd6 11.Nc3 (11.Nf3 Bg4+/-) 11...0-0 (11...d4 12.Na4+=) 12.Nf3 Be6 (12...d4 13.ed4 ed4 14.Nd4 Re8 15.Be2 Bh2 16.Nf3+/- (16.Rh2 Qd4 17.Kf1 Nc6 18.bc6 Re2 19.Ne2 Qb2+/-)) 13.d4 (13.Be2 Re8+/-) 13...e4 14.Ne5 Ne8 15.a4 (better 15.f4+/-) 15...f6=+ 16.Ng4 (16.Nd7!? Nd7 17.cd7 Qd7 18.Qb3=+) 16...h5-/+ 17.h3 (17.Nh6 gh6 18.Qb3 h4-/+) 17...hg4-+ 18.hg4 Qc8 (18...Bb4!?-/+) 19.Be2 f5 20.gf5 (better 20.Qb3=+) 20...Bf7?? (better 20...Rf5 21.f4 ef3 22.gf3 Nf6-/+) 21.g4+/- Nf6 (21...Qd8 22.Qb3+/-) 22.Qb3 (better 22.g5 Qf5 23.gf6 Qf6 24.Qb3+-) 22...g6? (better 22...Nh7+/-) 23.fg6+- Bg6 24.Kd2 (better 24.g5 Nh7 25.Nd5+-) 24...Qe6+/- (24...Ng4 25.Rag1 Rf2 26.Rh4 (26.Rg4? Qg4 27.Rf1 Qf5 28.Rf2 Qf2-+) 26...Nc6 27.Rhg4+-) 25.Rag1 Kg7 26.g5 (26.Rg2 Rd8+/-) 26...Nh7 (26...Ng8 27.Rg2 Ne7 28.Ba3+/-) 27.Nd5 (27.Rg2 Rd8 28.Bd1+/- (28.Nd5?! Nc6 29.bc6 Qd5 30.Qd5 Bb4 31.Kc2 Rd5=)) 27...Nc6 (27...Rf2 28.Ke1 Re2 29.Ke2 Nc6=) 28.bc6+- Ra5? (better 28...Rf2 29.Qb5 Qf7+-) 29.Bc4 Rf2 30.Kc1 Qf5 31.Bc3 (better 31.Nc7 Rb2 32.Kb2 Bc7 33.Rg2+-) 31...Ra8 (31...Rd5 32.Bd5 Ng5+-) 32.Nf4! Bf4 33.ef4 e3?? (33...Qf4 34.Kb1 e3 35.Ka1 Qe4+/- (35...Ng5 36.d5 Qf6 37.Bf6 Rf6 38.Rg5+-)) 34.d5+- Kf8 35.Qb4 (better 35.Bb4 Ke8 36.Qe3 Qe4 37.Re1 (37.Qf2?! Qc4 38.Kd1 Qb3 39.Ke2 Qd3 40.Ke1 Qb1 41.Ke2 Qd3 42.Ke1 Qb1 43.Ke2 Qd3=) 37...Rc2 38.Kd1 Rc4 39.Qb3 Rd4 40.Kc1+-) 35...Ke8-+ 36.Qb3 Qf4 (36...Ra4 37.Re1 Rc4 38.Re3 Kd8 39.Rhh3 Rc2 40.Kd1 Qg4 41.Rhf3 Qg1 42.Be1 Rc1 43.Kd2 Qg2 44.Bf2 R4c2 45.Qc2 Rc2 46.Kd1 Ra2 47.d6 Qf1 48.Re1 Qc4 49.dc7 Kc8 50.Re8 Be8 51.Bb6 Qe2 52.Kc1 Qc2) 37.Rh7?? (better 37.d6 Rc2 38.Qc2 Bc2 39.d7 Ke7 40.Kc2 Qc4 41.Rh7 Kd6 42.Rd1 Kc6 43.Rh6 Kb7 44.d8Q Rd8 45.Rd8=+) 37...e2-+ 38.Kb2 (38.Bd2 Ra4 39.Qa4 (39.Bf4 Ra1 40.Kb2 e1Q 41.Be2 Re2 42.Bd2 Rd2 43.Qc2 Rc2 44.Kb3 Qc3) 39...Rf1 40.Rf1 ef1Q 41.Bf1 Qa4 42.Rh8 Ke7 43.Bb4 Qb4 44.d6 Qd6 45.Bb5-+) 38...e1Q (38...Bh7?! 39.Re1=) 39.Ka3 Qg1 (39...Qd6 40.Bb4 Ra4 41.Ka4 Ra2 42.Kb5 Qc5 43.Bc5 Ra5) 40.Kb4 (40.Rh8 Qf8! 41.Rf8 Rf8 42.d6-+) 40…Bh7 (40...Bh7 41.Be5 Qe1 42.Ka3 Qfe5 43.Qc2 Bc2 44.Bb3 Bb3 45.Kb3 Q1c3; 40...Qd6 41.Kb5 Qc5) 0-1. Toadofsky (2120) - ImprovingSkill (2335), Rated Bullet game, lichess.org, 2015.

5.cd5 Bb4 6.de6 fe6 =.

5.cd5 ed5 6.a3 Bd6 7.Nc3 0-0 8.Nf3 c6 (8...a5 9.b5=) 9.d4 (9.Be2 Nb6=+) 9...Nb6=+ 10.Qc2 g6 (10...Re8 11.Bd3=+) 11.Be2 Bf5 12.Qd2 (12.Qb3 Re8=) 12...Qc7 (12...Ne4 13.Ne4 Be4 14.0-0=) 13.h3 Be4 (13...Nc4 14.Bc4 dc4 15.Rc1=+) 14.Rc1 (14.Ne4 Ne4 15.Qc2 Rae8=) 14...Bf3=+ 15.Bf3 (15.gf3 Qe7=+) 15...Nc4-/+ 16.Qc2 Rfe8 (16...a5 17.Be2-/+) 17.0-0 Re6 (17...a5 18.b5=+) 18.e4 (better is 18.Be2!?=) 18...de4-/+ (18...Nb2 19.ed5 cd5 20.Qb2+/–) 19.Ne4 Ne4 (19...Nb2?! 20.Nf6 Rf6 21.Qb2=) 20.Be4 Nb2 21.Bd5?? (21.Bf3 Rae8=+) 21...Rf6 (better is 21...cd5 22.Qc7 Bc7 23.Rc7 b6-+) 22.Qb2=+ Bf4 23.Rc2 Qd6 24.Bf3 Re8 25.Rd1 Bh6 26.d5 cd5 27.Bd5+= Qb6 28.a4 Bg7 29.Qb3 Kf8 30.b5 a6 31.Qb4 Kg8 32.Qc4 ab5 33.ab5 Bf8 34.h4 h5 35.Rb1 Bd6= 36.Qc3 Be5 37.Qb3 Kg7 38.Kf1 Bd4=+ 39.Rd1? Bf2-+ 40.Bf3 Bh4 41.Rd7 Re1 0–1. wlittle (2235) – mic (2235), net–chess.com, 2004.

5.cd5 ed5 6.a3 Be7 7.Nc3 0-0 8.Nf3 c6 (8...a5 9.b5=) 9.Be2= Qc7 10.0-0 Re8 11.Rc1 Qd8 12.h3 Nb6 13.d3 Be6 14.Nd4 Bd7 15.Nf3 (15.Nb3 Bd6=) 15...Rc8 (15...a5 16.ba5 Ra5 17.Qb3=) 16.Ne5 Be6 17.f4 d4 (17...Nbd7 18.Na4=) 18.ed4 (18.f5 Bd7 A) worse is 19.Nd7 dc3 20.Nb6 A1) worse is 20...cb2 21.Nc8 bc1Q 22.Ne7 (22.Qc1? Qc8 23.d4 Qd8-+) 22...Qe7 23.Qc1+=; A2) 20...Qb6 21.Bc3 Qe3 22.Kh1 Nd5-/+; B) 19.Qb3=) 18...Qd4+= 19.Kh1 Nbd5?? (19...Nbd7 20.Nc4 Bc4 21.dc4=) 20.Qd2?? (better is 20.Na4 Nc3 21.Bc3+-) 20...Nc3 21.Bc3 Qd5 (21...Qd6 22.Bf3+=) 22.f5= Bd7 23.Bf3 Qd6 24.Qg5?? (24.Rce1 Bd8 25.Nc4+=) 24...Nd5?? (better is 24...Ne4! 25.Qg4 Bf5 26.Nf7 Ng3 (26...Bg4?! 27.Nd6 Ng3 28.Kg1 Bd6 29.Bg4+=) 27.Kg1 Qg6 (27...Bg4?! 28.Nd6 Bd6 29.Bg4+=; worse is 27...Kf7 28.Qg7 Ke6 29.Bg4+=) 28.Qg6 Bg6-+) 25.Nf7+= Bg5 (25...Nc3? 26.Nd6 Bg5 27.Rc3+-) 26.Nd6 Bc1 27.Rc1 (27.Bd5 cd5 28.Rc1 d4=) 27...Nc3 28.Rc3 Re1 29.Kh2 Rb8 30.Be4 (30.d4 Kf8 31.Rc5 Re3=) 30...h6 (30...Kf8 31.b5 cb5 32.Rc7+=) 31.Rc2 (31.Kg3 Kf8=) 31...Kf8+= 32.g4 Ke7 33.Nc4 Kf6 (33...Be8 34.Kg3=) 34.Rg2 (34.Kg2 Be8=) 34...b5 (34...Be8 35.Rg1 Rg1 36.Kg1+=) 35.Nd2 (better is 35.Na5!?=) 35...Ra1-/+ 36.Nf3 (36.Nb3 Ra3 37.Nc5 Be8-/+) 36...Ra3 37.g5 (37.d4!? Rb3 38.Ra2 Rb4 39.Ra7-/+) 37...hg5-+ 38.Ng5 (38.Rg5 Be8-+) 38...Bf5 0–1. zabazaba (1635) – lazermuti (1615), gameknot.com, 2014.

5.cd5 Nd5 6.a3= N7f6 (6...N5f6 7.d4=) 7.Nf3 (7.Qf3 a5 8.b5 Be7=) 7...Be7 (7...a5 8.b5=) 8.Be2 0-0 9.0-0 b6 (9...a5 10.b5=) 10.h3 (10.Nc3 Bb7=) 10...c5 (10...Bb7 11.Nc3=) 11.b5 (11.bc5 Bc5 12.d4 Be7=) 11...Bb7 (11...a6 12.d4=+) 12.d3 (12.d4 a6=) 12...Qc7 (12...a6 13.ba6 Ba6 14.Qc2=+) 13.Nbd2= Rad8 (13...a6 14.ba6 Ba6 15.Qc2=) 14.Rc1 (14.Nc4 Qd7 15.a4 Qe8=) 14...Qb8 (14...Qd7 15.d4=) 15.Ne5 (15.Be5 Qc8=) 15...Bd6 (15...Qa8 16.Qa4=) 16.Ndc4+= Nd7 (16...Bc7 17.f4+=) 17.f4 (17.Nd6 Qd6 18.Nc4 Qe7+=) 17...f6 18.Nc6 (18.Nd7 Rd7 19.Bg4 Nc7+=) 18...Bc6= 19.bc6 b5 20.Nd6 (worse 20.cd7 bc4 21.Qd2 cd3 22.Bd3 Rd7=+) 20...Qd6 21.cd7 (21.e4 Ne3 22.Qe1 Nf1 23.cd7 Qf4 24.Bf1 Qd6+-) 21...Ne3 22.Qb3 Nf1 23.Rf1 (23.Bf1 Rd7 (worse 23...Qd7 24.Rc5 a6 25.d4+-) 24.f5 Re7=) 23...Kh8 (23...Rd7 24.Bg4 (24.Qb5? Rb8 25.Qc4 Rb2-+) 24...Re8 25.Re1 (25.Qb5? h5 26.Bh5 Rb8-+) 25...Qd3 26.Be6 Kh8 27.Qd3 Rd3 28.f5-/+) 24.Rf3 (24.d4 Rd7 25.dc5 Qc5 26.Kh2 Rd2 27.Bb5 Rb8-/+) 24...a6 (24...Rd7 25.Re3 (25.Qb5? Rb8 26.Qc4 Rb2-+) 25...Re7 A) 26.Qb5? Rb8 27.Be5 Qe5 (27...Rb5 28.Bd6 Re8 29.a4 Rb1 30.Kf2+-; 27...fe5?! 28.fe5 Qe5 29.Re5 Rb5 30.a4-+) 28.fe5 Rb5-+; B) 26.Qc3=+) 25.Qc2 (25.Re3!?=) 25...Rd7=+ 26.Kh1 (26.Re3 Re7=+) 26...Qb6 (26...Re8 27.Bc1=+) 27.Rg3 (27.Rg3 Rc8 28.Re3=+; 27.Re3 Re8=+). GuestWHXM – GuestBDLJ, freechess.org, 2017.

5.Nf3 Bb4-/+ 6.h3 (6.cd5 ed5 7.Nc3 c6-/+) 6...0-0 7.g4 (7.cd5 ed5 8.Be2 Re8-/+) 7...c6 (7...dc4 8.Bc4 Nb6 9.Be2-+) 8.g5 (8.Qc2 Bd6-+) 8...Ne4 9.h4 (9.Rg1 Be7-+) 9...Qe7 (9...Re8 10.Qc2 e5 11.cd5 cd5 12.Bd3-/+) 10.Qc2 (10.a3 Ba5-+) 10...Bd6 (10...e5 11.cd5 cd5 12.a3-/+) 11.d3-/+ Bb4 (11...Nec5 12.d4 Ne4 13.Nc3-/+) 12.Kd1 (12.Ke2 Nd6 13.cd5 ed5 14.Bg7 Kg7 15.Qb2 Kg8 16.Qb4 Re8=) 12...Nd6 (12...Nec5-/+) 13.Rg1 (13.Bg7 Kg7 14.Qb2 e5 15.Qb4 dc4 16.dc4 e4=+) 13...e5 (13...c5!?-/+) 14.cd5=+ cd5 15.Qb3 Ne8 16.Qd5 (16.Nc3 Bc3 17.Qc3 Nd6=+) 16...Nc7 (16...Bd6 17.h5-/+) 17.Qe4 (17.Qc4 Bd6=+) 17...Bd6-/+ 18.d4 (18.h5-/+) 18...ed4 (18...f5 19.Qc2-/+) 19.Qd4 (better is 19.Qe7!? Be7 20.Nd4=) 19...Ne6-/+ 20.Qg4 (20.Qd5-/+) 20...Nec5 (20...Ndc5!? 21.Qh5 Ne4-/+) 21.Qd4=+ Ne6 (21...f6=+) 22.Qg4-/+ Rd8 (22...Ndc5 23.h5 Bd7-/+) 23.Kc2 (23.Nbd2-/+) 23...Ne5?? (23...Nb6 24.Qe4 Qc7 25.Nc3 Nc5-+) 24.Ne5= Be5 (better is 24...Qc7!? 25.Qc4 Be5 26.Qc7 Bc7=) 25.Be5+/– Nd4 26.Bd4?? Bg4-/+ 27.Rg4 Qd7 28.Rf4-+ Qa4 29.Kd2 Qb4 30.Kc2 Rd4! (31.Rd4 Rc8 32.Bc4 Rc4 33.Rc4 Qc4 34.Nc3 Qh4-+) 0–1. Caminade,Christian – Boutteville,Cesar, FRA–ch Dieppe, 1967.

6.Bc4 Nb6 7.Be2 Bd6 8.Bf6 Qf6 9.d4=+.

6.Bc4 Nb6 7.Be2 Bd7 8.a4 Bb4 (8...Nbd5 9.Nf3=) 9.Nf3 0-0 10.0-0 a6 (10...Bd6 11.Nc3 Nbd5 12.Nd5 ed5 13.Ne5=) 11.Nc3 (11.ba6 ba6 12.Nc3 Nbd5+=) 11...ab5 12.ab5 Ra1 13.Qa1 Qa8 (13...Bd6 14.Bd3+=) 14.Qb1 (14.Ne5 c6+-) 14...Be7 (14...Bd6 15.Qc2+=) 15.Ne5+- Be8 16.Qc2 (16.Qd3 Nfd5+-) 16...c6 (16...Nfd5 17.Nd5 Nd5 18.e4+-) 17.bc6 (17.Ra1 Qb8 18.f4 Nbd5 19.Nd5 cd5+-) 17...Bc6+- 18.Nc6 (18.Ra1 Qb8 19.Nc6 bc6+-) 18...bc6 19.Rb1 (19.Bd3 Nbd5 20.Nd5 cd5+-) 19...Nbd5 20.Nd5 (20.h3 Rb8+=) 20...cd5+= 21.Qc7 (21.Rc1 Bd6+=) 21...Qd8 22.Qc3 (22.Qd8 Rd8 23.Bd4 Ne4+=) 22...Qc8 (22...Qd7 23.Qb3+=) 23.Bd3 (23.Qd3 Qd7+=) 23...Qc3= 24.Bc3 Rc8 (24...Ne4 25.Be4 de4 26.f3 ef3 27.gf3=) 25.f3 (25.Rb7 Bd6+-) 25...Kf8 (25...Nd7 26.Bb5 Rb8 27.Kf2+=) 26.Rb7+- g6 27.Kf2 Bd6 1–0. DEFFM – GuestFBPS, freechess.org, 2018.

6.Bc4 Nb6 7.Be2 Bd7 8.Nf3 Be7 (8...c6 9.bc6 Bc6 10.0-0=+) 9.0-0 0-0 10.Nc3 c6 11.a4 cb5 12.ab5 Nbd5 (12...Bd6 13.d4=) 13.Ne5 Qe8 14.Qb3 Nc3 15.Bc3 Ne4 16.Nd7 Qd7 17.d4 Nc3 18.Qc3 Rfc8 19.Qb2 Bd8 (19...Bd6 20.Rfc1=) ½–½. Myslowski,Karol – Vacca,Georges, FRA–ch op Veterans, 1994.

6.Bc4 Be7 7.Nf3 0-0 8.a4 b6 9.0-0 Bb7 10.d4 c5 11.Nbd2 cd4 12.Nd4 Rc8 13.Rc1 Nd5 (13...Nc5 14.Qc2=) 14.Qb3 (14.Bd5 Rc1 15.Qc1 Bd5=) 14...Nc5= 15.Qa2 Bf6 16.N2f3 Nb4 17.Qa1 (17.Qa3!? Bf3 18.gf3=) 17...Nbd3 18.Bd3 Nd3 19.Rc8 Qc8 20.Bc3 Qc4 21.Nd2 Qd5 22.e4 Qh5 (22...Qc5 23.N2b3 Qc7 24.Nc6 Bc6 25.Bf6 gf6 26.bc6 Qc6 27.Qd4-/+) 23.N4f3 e5 24.Rd1 (24.a5 ba5 25.Qa5 Qg6=+) 24...Rc8=+ 25.Be5?? (better 25.Nf1 Be4 26.Ng3=) 25...Ne5-+ 26.Qa3 h6 (26...Nf3 27.Qf3 Qf3 28.gf3-+) 27.h3 (27.Re1 Rc2-+) 27...Rd8 28.Qb3 (28.Re1 Nd3 29.Re3 Nf4-+) 28...Nf3 29.Nf3 Rd1 30.Qd1 Be4 31.Qe2 Bf3 32.gf3 (32.Qf3 Qf3 33.gf3 Kf8-+) 32...Qg5 (32...Qh3!? 33.Qe8 Kh7 34.Qf7 Qf3 35.Qc4-+) 33.Kf1 Qe5 34.Qc4 g6 35.f4 (35.Qb4 Qh2 36.Qg4 h5 37.Qc8 Kg7-+) 35...Qc5 (35...Qb2 36.f5 Bd4 37.Qe2 Qb1 38.Kg2 Qf5 39.Qf3-+) 36.Qe4 Kg7 37.Kg2 Qd4 38.Qf3 (38.Qd4 Bd4 39.Kf3 Kf6-+) 38...Qa4 39.h4 (39.Qe2 Qf4 40.Qd3 Bd4-+) 39...Qb5 40.h5 (40.f5 Bh4 41.fg6 Qg5 42.Kf1 fg6-+) 40...Qh5 41.Qb7 Qg4 42.Kf1 Qf4 43.Qa7 Bd4 44.Qa2 Qf2! 45.Qf2 Bf2 46.Kf2 Kf6 47.Kf3 Ke5 48.Kg4 f5 (48...f5 49.Kf3 Kd4-+) 0-1. zembelek (2065) - PRESA (2265), Rated Blitz game, lichess.org, 2014.

6.d4 Rb8 =.

6.Nf3 a5 7.a3 Be7 (7...b6 8.b5=) 8.d4 0-0 (8...b6 9.Ne5 Ne5 10.de5=+) 9.Bd3 (9.b5 e5=) 9...ab4 (9...b6 10.Ne5 Ne5 11.de5=) 10.ab4 Ra1 11.Ba1 Ne4 (11...b6 12.0-0=) 12.0-0 f5 13.Nbd2 (13.Qc2 b6=) 13...Rf6 (13...b5 14.Bb2+=) 14.b5 (14.Ne5 Qc7+=) 14...Nf8 (14...Rf7 15.Bb2+=) 15.Ne5+/– Bd7 (15...cb5 16.Bb5 Nd7 17.Ndf3+=) 16.bc6 (16.b6 Ng6 17.Ndf3 Be8+/–) 16...bc6 (16...Bc6 17.Ndf3+/–) 17.f3 (17.Ndf3 Qc7+/–) 17...Nd2 18.Qd2 Be8 19.e4 (19.Bc3!?+/–) 19...fe4 20.fe4 Rf1 21.Kf1 Bg5 (21...de4 22.Be4 Bc5 23.Bc3=) 22.Qf2+= Qa5 23.Bb2 Qa4 24.ed5 ed5 25.Bc3 Qd1 26.Be1 Qh5 27.Qf5+= g6 28.Qc8+/– Qh2? 29.Qe8+- Qh1 30.Kf2 Bh4 31.Kf3 Qe1 32.Qf7 (32...Kh8 33.Qf8) 1–0. Wall,Bill – Breezy, Internet, 2005.

6.Nf3 b6 7.Qa4 Rb8 +=.

6.Nf3 Qc7 7.d4 (7.Bf6 gf6 8.d4 b6+=) 7...Be7 8.Nc3 (8.Nbd2 b6=) 8...0-0 (8...b6 9.Rc1=) 9.a4 (9.h3 e5=) 9...Re8 (9...b6 10.cb6 Qb6 11.b5=) 10.Qb3 (10.a5 h6=) 10...e5 (10...b6 11.Qc2=) 11.de5 Ne5 12.Ne5 Qe5 13.Ne2 Qg5 14.Nd4 A comfortable square for the white knight (14.a5 Bd8 15.Bd4 Ng4=) 14...Ne4 15.Qc2? (15.a5 Qh4 16.g3 Qh6+=) 15...Bd7?? Black loses the upper hand (15...a5 16.Bd3 Bd8 17.Ne2 ab4 18.Be4 Re4 19.0-0-+) 16.g3? (16.Nf3 Qf5 17.Nd4 Qg6+=) 16...Qh6 (better is 16...a5!? 17.h4 Qh6-+) 17.Bg2-/+ Rac8 (17...a5 18.Qb3+=) 18.a5 White gets more space 18...Bh3 Black threatens to win material: Bh3xg2 19.0-0 a6 Secures b5 20.Rae1 (20.Bh3 Qh3 21.f3 Ng5=) 20...Bf6 21.f3 White threatens to win material: f3xe4 21...Ng5 22.Bc1 Bg2 23.Qg2 Qg6 24.Qd2 Re7 25.g4 Bd4 26.ed4 Ne6 27.Re5 Rce8 28.Rfe1 Kf8 29.Qe3?? f6-+ 30.Re6 Re6 31.Qe6 Re6 32.Re6 Kf7 33.Re1 Qd3 34.Be3 Qc3 35.Kf2 Qb4 36.h4 Qa5 37.h5 Qa2 38.Re2 Qb1 39.Bf4 h6 40.Bd6 a5 41.Re7 Kg8 42.Re8 Kh7 43.Rc8 Qb2 44.Ke3 Qc1 45.Kd3 Qc4 46.Ke3 Qc3 47.Kf4 Qd4 48.Kf5 Qe3 49.Rc7 Qf3 50.Ke6 Qg4 51.Ke7 Qh5 52.Kf8 Kg6 53.Rg7 Kf5 54.Rb7 d4 55.Rd7 Qe2 56.Bc7 d3 57.Ba5 h5 58.Rd6 Qe4 59.Bc3 h4 60.Rf6 Kg5 61.Rf7 h3 62.Bd2 Kg4 63.Rf2 Qf3! Black should return some of the goodies he has collected 64.Rf3 Kf3 65.Ke7 h2 66.Kd6 h1Q 67.Kc6 Ke2 68.Kd7 Qd5 (68...Qd5 69.Kc7 Kd2 70.c6 Ke3 71.Kb6 d2 72.c7 d1Q 73.c8Q Q1d4 74.Ka6 Qa1 75.Kb6 Qaa5; 68...Kd2 69.c6 Ke3 70.c7 Qb7 71.Ke6 Qc7 72.Kf5 d2 73.Kf6 d1Q 74.Ke6 Qg7 75.Kf5 Qdg4) 0–1. Kalanyos,Ferenc – Fekete,Lajos (2015), HUN–chT2 Asztalos, 2003.

6.Nf3 g6 7.d4 Bg7 8.Bd3 (8.Nc3 0-0=) 8...0-0 9.0-0 (9.Nbd2 e5 10.Ne5 Ne5 11.de5 Ng4=) 9...Re8 (9...e5 10.Be2 a5 11.a3 ab4 12.ab4 Ra1 13.Ba1=) 10.Nbd2 (10.h3 a5 11.a3 ab4 12.ab4 Ra1 13.Ba1 b5+=) 10...h6 (10...e5 11.Ne5 Ne5 12.de5=) 11.a4 (11.b5 e5 12.Ne5 Ne5 13.de5 Ng4 14.bc6 bc6+=) 11...Nh7 (11...e5 12.Ne5 Ne5 13.de5=) 12.b5 (12.Qc2 Qc7+-) 12...e5 (12...Nc5 13.Be2=) 13.Ne5 Ne5 14.de5 Be5 15.Be5 Re5 16.Nf3 (16.bc6 bc6 17.Rb1 Nf6+=) 16...Re8 (16...Bg4!?=) 17.Qc2 Qf6 18.Rad1 (better 18.bc6!? bc6 19.Rab1+=) 18...Bg4=+ 19.Be2 Bf3 20.Bf3 Ng5 21.Be2 h5 22.Bd3 h4 23.h3 Ne4 (23...Rab8 24.Rfe1=) 24.Be4 (24.Rb1!?=) 24...Re4=+ (worse 24...de4 25.Rd6 Re6 26.bc6 bc6 27.Rfd1+-) 25.Rc1 Rd8 Black intends d4 (25...Rb4 26.Qa2=+) 26.Rfd1 (26.Qb3 Kg7=) 26...Qe5 (26...Rb4 27.Rb1 Rc4 28.Qb3=+) 27.Kh1 (27.Qb3 Qc7=) 27...d4 (27...Rb4 28.Rd2=+) 28.Qd3 (28.bc6!? bc6 29.Kg1=+) 28...Rd5-/+ 29.f4? (better 29.bc6 bc6 30.ed4 Red4 31.Qf3-/+) 29...Qf5-+ 30.Rc4 (30.bc6 bc6 31.Qb1 de3 32.Rd5 Qd5 33.Re1-+) 30...de3 31.Qe4 Rd1 32.Kh2 Qe4 (better 32...e2 33.Qe2 Qb1 34.Qd1 Qd1-+) 33.Re4-/+ Re1 (33...Rd3 34.g4-/+) 34.bc6 (34.g4 Re2 35.Kg1 Rc2 36.bc6 bc6 37.Re3 Rc5-/+) 34...bc6 35.a5 (35.g4 Re2 36.Kg1 Kg7-/+) 35...Kf8 (35...f5!? 36.Re7 Kf8 37.Re5-+ (37.Ra7?? Rf1 38.Ra8 Ke7 39.Ra7 Kf6-+)) 36.g4 e2 37.Kg2 Rc1 38.Re2 Rc5 39.Ra2 Ke7 40.Ra3 Kd7 (40...Rb5 41.a6-+) 41.Kf3-/+ Kc7 42.Ke4 (42.g5 Rf5 43.Ke4 Kd6-+) 42...Kb7 (42...Kd6-/+) 43.Kd4? (43.f5!?-/+) 43...Rd5 44.Kc4? (44.Ke4 Ka6 45.Rc3 f5 46.Kf3 c5-+) 44...Kc7?? (better 44...Ka6-+) 45.Re3? (better 45.Ra4-/+) 45…Kd6-+ (45...Ra5?! 46.Re7 Kd6 47.Rf7 Ra4 48.Kd3-/+) 0–1. De Leon Navarro,Claudio – Sosa Suarez,CC, Gran Canaria Spain, Cabildo Memorial, 2015.

6.f4 Be7 7.Nf3 0-0 8.Be2 Ne4 (8...a5 9.Qa4=+) 9.g3 (9.d3 Bh4 10.g3=+) 9...Bf6 10.Ne5 Be5 11.fe5 f5 (11...b6 12.d3 Ng5 13.h4 bc5 14.bc5+- (< 14.hg5 Qg5 15.Qc2 cb4+=)) 12.d3+= Ng5 13.Nd2 b6 14.Nb3 (14.d4 bc5 15.bc5 Rb8+=) 14...bc5 15.bc5 Qc7 16.h4 Nf7 17.d4 g5? (17...a5!?=) 18.Rb1 (18.hg5 Ng5 19.g4 fg4 20.Bg4 Rb8+/–) 18...g4 19.Bc3 Nb8 20.Na5 Na6 (20...Kg7 21.0-0+/–) 21.Kf2 (21.Qa4 Rb8 22.Nb3 Qb7+/–) 21...Rb8 22.Qa4 Rb1 23.Rb1 Nb8 24.Qb3 (24.Nb7 Bb7 25.Qa7 Qc8 26.Rb7 Qd8+-) 24...Na6 25.Nb7 Bb7 26.Qb7 Qb7 27.Rb7 Nb8 28.Ra7 Re8 (28...Nd8 29.a4 Rf7 30.Ra8+-) 29.a4 Kf8 30.Rb7 Rc8 31.a5 (31...h6 32.a6+-) 1–0. Furlong,Kevin – Heslop,Anthony G, Oxford op, 1998.

6.Nf3 0-0 7.Be2 c6 8.0-0 b6 (8...a5 9.a3 ab4 (9...Qc7 10.Nc3 ab4 11.ab4 Ra1 12.Qa1 b6 13.d4 Bb7 14.Qc1 Ra8) 10.ab4 Ra1 11.Ba1 Qc7 12.Nc3 b6 13.d4 Bb7 14.Bb2 Ra8) 9.d4 (9.b5 Bb7 10.bc6 Bc6 11.Nd4 Rc8 12.Ba6 bc5 13.Bc8 Qc8 14.Nc6 Qc6; 9.Qc2 Bb7 (9...bc5 10.bc5 Nc5 11.d4 Nce4 12.Ne5 Qb6 13.Nc3 Ba6 14.Ne4 de4) 10.cb6 Bb4 11.ba7 Ra7 12.Nc3 e5 13.d4 ed4 14.ed4 Re8; 9.Nc3 bc5 (9...Bb7 10.d4 a5 11.a3 ab4 12.ab4 Ra1 13.Qa1 Qc7 14.Qd1 Ra8) 10.bc5 Nc5 11.d4 Nce4 12.Ne5 Bd6 13.Qc2 c5 14.f3 Nc3; 9.Nd4 Bb7 (9...Qc7 10.cb6 ab6 11.a3 Ne5 12.f4 Nc4 13.Bc4 dc4 14.Nc3 c5) 10.b5 Rc8 11.bc6 Bc6 12.Ba6 bc5 13.Bc8 Qc8 14.Nc6 Qc6) 9...a5 10.a3 (10.b5 Bb7 11.cb6 Qb6 12.Nc3 cb5 13.Bb5 Bc6 14.a4 Rfc8) 10...Rb8 (10...ab4 11.ab4 Ra1 12.Ba1= Bb7 13.Nc3 Qc7 14.Bb2 Ra8) 11.Qc2 Qc7 (11...Ra8 12.Ne5 (12.Nc3 Bb7 13.h3 h6 14.Bd3 Qc7) 12...Ne5 13.de5= Nd7 14.cb6 Qb6) 12.Nbd2+= (12.Nc3 bc5 13.bc5 e5 14.Rab1 e4) 12...bc5 13.bc5 e5 (13...Qa7 14.Rab1 Ba6) 14.Ne5 (14.Rab1 e4) 14...Ne5 15.de5 Nd7 16.Nb3?? (better 16.Bd4 Ne5 17.Rab1+=) 16...Qb7-/+ 17.Bd3 (better 17.Na5!? Qb2 18.Qb2 Rb2 19.Nc6 Bc5 20.Bf3-/+) 17...Qb3-+ 18.Bh7 Kh8 (18...Kh8 19.Rfb1 Bc5-+) 0–1. Torres Herrero,F – Ortega Lozano,MA, Valladolid, 1987.

6.Nf3 0-0 7.Be2 c6 8.Nc3 A) 8...Qc7 A1) 9.0-0 b6 (9...a5 10.a3 ab4 11.ab4 Ra1 12.Qa1 b6 13.d4 Bb7 14.Qb1 Ra8; 9...e5 10.d4 e4 11.Nd2 b6 12.h3 Bb7 13.Rb1 g6 14.Qc2 Kg7) 10.d4 a5 11.cb6 Qb6 12.b5 cb5 13.Bb5 Ba6 14.a4 Rfc8; A2) 9.a3 b6 (9...e5 10.0-0 e4 11.Nd4 Ne5 12.Qc2 b6 13.f4 ef3 14.Nf3 Nf3; 9...h6 10.0-0 b6 11.d4 e5 12.Qc2 bc5 13.bc5 Rb8 14.Rab1 Bb7; 9...g6 10.0-0 b6 11.d4 bc5 12.bc5 Rb8 13.Qc2 Re8 14.Rab1 e5; 9...a5 10.0-0 ab4 11.ab4 Ra1 12.Qa1 b6 13.d4 Bb7 14.Qd1 Ra8) 10.cb6 ab6 11.0-0 Ba6 12.Ba6 Ra6 13.Rc1 Raa8 14.Qc2 Qd6; A3) 9.d4 b6 (9...Rb8 10.0-0 b6 11.Qc2 bc5 12.bc5 e5 13.Rab1 Re8 14.h3 h6; 9...e5 10.0-0 e4 11.Nd2 b6 12.h3 Bb7 13.a4 Rfb8 14.Rb1 Nf8) 10.0-0 a5 11.cb6 Qb6 12.b5 cb5 13.Bb5 Ba6 14.a4 Rfc8; B) 8...a5 9.a3 Qc7 (9...e5 10.0-0 e4 11.Nd4 Ne5 12.h3 Qc7 13.Na4 ab4 14.ab4 Be6; 9...b6 10.d4 ab4 11.ab4 Ra1 12.Qa1 Qc7 13.0-0 Bb7 14.Qb1 Ra8) 10.Nd4 Ne5 11.0-0 Nc4 12.Bc4 dc4 13.f4 e5 14.fe5 Ng4; C) 8...b6 9.d4 a5 (9...bc5 10.bc5 Rb8 11.Qc2 Qa5 12.Nd2 Rd8 13.0-0 e5 14.Rab1 Bb7; 9...Rb8 10.Qc2 a5 11.a3 bc5 12.bc5 e5 13.Rb1 e4 14.Nd2 Qc7; 9...Qc7 10.0-0 a5 11.cb6 Qb6 12.b5 cb5 13.Bb5 Ba6 14.a4 Rfc8; 9...Bb7 10.Qb3 a5 11.ba5 Ra5 12.0-0 Ba6 13.Ba6 Ra6 14.cb6 Rb6) 10.a3 ab4 11.ab4 Ra1 12.Ba1 g6 13.0-0 Qc7 14.Bb2 Bb7.

6.Nf3 0-0 7.Be2 c6 8.d4 A) 8...Ne4 A1) 9.Nc3 Qc7 (9...Nc3 10.Bc3 Nf6 11.0-0 Ne4 12.Qc2 Nc3 13.Qc3 Qc7 14.Bd3 f6; 9...a5 10.b5 Ndf6 11.0-0 Nc3 12.Bc3 Ne4 13.Qc2 cb5 14.Bb5 Bd7; 9...Ndf6 10.0-0 Qc7 11.Qc2 Nc3 12.Bc3 Ne4 13.Bd3 Nc3 14.Qc3 f6; 9...h6 10.0-0 a5 11.b5 a4 12.a3 Ndf6 13.Qc2 Nc3 14.Bc3 cb5; 9...b6 10.0-0 bc5 11.dc5 Qc7 12.Qc2 Ndf6 13.Bd3 a5 14.Ne4 de4) 10.0-0 Ndf6 11.Ne4 Ne4 12.Nd2 Nd2 13.Qd2 Bd7 14.a4 Bf6; A2) 9.Nfd2 a5 (9...Ndf6 10.Nc3 a5 11.Nde4 Ne4 12.a3 f5 13.0-0 Bd7 14.f3 ab4) 10.Ne4 de4 11.Nc3 ab4 12.Ne4 b6 13.cb6 Qb6 14.f4 f5; A3) 9.0-0 a5 10.ba5 e5 11.Nc3 ed4 12.ed4 Qa5 13.Qc2 f5 14.Nd2 Qc7; A4) 9.Qc2 a5 10.b5 e5 11.Nc3 ed4 12.ed4 Ndf6 13.bc6 bc6 14.Ne5 Qc7; A5) 9.Nbd2 a5 (9...Ndf6 10.0-0 a5 11.Ne4 Ne4 12.b5 a4 13.bc6 bc6 14.Rb1 Qc7) 10.b5 Ndf6 11.0-0 cb5 12.Bb5 Bd7 13.Bd3 b6 14.Qc2 Nd2; B) 8...a5 B1) 9.a3 ab4 (9...Qc7 10.Nc3 Ne4 11.Ne4 de4 12.Nd2 f5 13.0-0 ab4 14.ab4 Ra1; 9...Ne4 10.Nc3 h6 11.0-0 Qc7 12.Ne4 de4 13.Nd2 f5 14.ba5 Nf6) 10.ab4 Ra1 11.Ba1 Qc7 12.Nc3 b5 13.Qc2 Bb7 14.0-0 Re8; B2) 9.b5 a4 (9...cb5 10.Bb5 Ne4 11.0-0 Ndf6 12.Ne5 Nd7 13.Nd3 Nb8 14.f3 Nf6; 9...e5 10.Nc3 ed4 11.ed4 a4 12.0-0 a3 13.Bc1 Ne4 14.Qc2 f5; 9...Ne4 10.Nc3 a4 11.Ne4 de4 12.Nd2 f5 13.0-0 Nf6 14.bc6 bc6) 10.0-0 Ne4 11.Qc2 e5 12.Nc3 a3 13.Bc1 Nc3 14.Qc3 e4; C) 8...Qc7 C1) 9.0-0 a5 (9...b6 10.Qc2 a5 11.cb6 Qb6 12.ba5 Qa5 13.Bc3 Qa4 14.Qa4 Ra4) 10.b5 b6 11.cb6 Qb6 12.a4 Bb7 13.Nc3 Rac8 14.h3 Bd6; C2) 9.Qc2 b6 (9...b5 10.a4 ba4 11.Nc3 Bb7 12.Ra4 a6 13.0-0 h6 14.Rfa1 Rfb8; 9...a5 10.b5 cb5 11.Bb5 e5 12.Nc3 e4 13.Nd2 Nb8 14.Be2 Nc6) 10.Nbd2 a5 11.cb6 Qb6 12.ba5 Qa5 13.Bc3 Qc7 14.0-0 Ba6; C3) 9.Nc3 b6 (9...a5 10.b5 e5 11.Qc2 ed4 12.ed4 Re8 13.0-0 a4 14.a3 Ne4) 10.0-0 a5 11.cb6 Qb6 12.b5 cb5 13.Bb5 Ba6 14.a4 Rfc8; D) 8...b6= D1) 9.0-0 a5 10.b5 Bb7 11.cb6 Qb6 12.Nc3 cb5 13.Bb5 Bc6 14.a4 Rfc8; D2) 9.Nbd2 a5 (9...Bb7 10.0-0 a5 11.a3 ab4 12.ab4 Ra1 13.Ba1 Qc7 14.Qc2 Ra8) 10.a3 ab4 11.ab4 Ra1 12.Ba1 Qc7 13.Qc2 Bb7 14.0-0 Ra8; D3) 9.Nc3 Bb7 (9...a5 10.a3 ab4 11.ab4 Ra1 12.Qa1 Qc7 13.0-0 Bb7 14.Qb1 bc5; 9...Qc7 10.Qc2 a5 11.cb6 Nb6 12.Ne5 Nc4 13.Nc4 ab4 14.Ne5 bc3; 9...Rb8 10.Qc2 a5 11.a3 bc5 12.bc5 e5 13.Rb1 e4 14.Nd2 Qc7; 9...bc5 10.bc5 Rb8 11.Qc2 Qa5 12.0-0 Ba6 13.Ba6 Qa6 14.Rab1 h6) 10.0-0 a5 11.a3 ab4 12.ab4 Ra1 13.Qa1 Qc7 14.Qa4 Ra8.

6.Nf3 0-0 7.Be2 Re8 8.d4 Nf8 (8...c6 9.0-0=) 9.Nbd2 (9.0-0 N8d7+=) 9...Bd7= 10.Ne5 Ng6 (10...a6 11.0-0=) 11.Ndf3 (11.Ng6 fg6 12.0-0 a6+=) 11...Ne4 (11...Ne5 12.Ne5 a5 13.b5+=) 12.Ng6 hg6 (12...fg6 13.Ne5+=) 13.h4 (13.Ne5 a6+-) 13...a5 14.b5 Bf6 (14...a4 15.Qc2=) 15.Qc2 b6 (15...a4!?+=) 16.c6+- Bc8 17.a4 (17.Bd3 Be7+-) 17...Be7 18.0-0-0?? (better 18.Bd3+-) 18...Nf2-/+ 19.Rdf1 (19.h5 Bg5 (worse 19...Nd1 20.hg6 f5 21.Qd1=) 20.Qc3 Nd1 21.Bd1 gh5 22.Rh5 Bf6-/+) 19...Nh1 20.Rh1 e5! 21.de5 (21.de5 Bc5 Decoy; 21.Ne5 Bh4 Deflection) 21...Bf5 (21...Bc5 22.h5 Be3 23.Kb1-/+) 22.Bd3 Bd3 (22...Be6 23.h5 gh5 24.Rh5-/+) 23.Qd3=+ Bc5 24.h5 Re6 (24...gh5 25.Rh5 g6+-) 25.h6 (better 25.hg6!? fg6 26.Kb1+=) 25...gh6-/+ 26.Rh6 1–0. Gross,Wilhelm – Merten,Rainer, xiii/15, 1986.

6.f4 0-0 7.Nf3 c6 (7...a5 8.a3=+) 8.Qc2 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 b6 12.d4 (12.Bd4 bc5 13.bc5 Ne4=+) 12...Ne4-/+ 13.Bd3 f5 (13...Ndf6 14.Nc3 Nc3 15.Bc3=) 14.0-0= Bb7 (14...Qc7 15.Nc3=) 15.Bc3 Qa8 (15...Qc7 16.Nbd2=) 16.Nbd2 (16.cb6 Nb6 17.Ne5 Qa4=) 16...Ba6 17.Ra1 Bd3 18.Qd3 Qb7 19.Ne5 Ne5 20.fe5 b5 (20...Qc7 21.Ra6=) 21.Ne4 (21.Rf1 Rf7=) 21...fe4 22.Qe2 Bg5 23.Bd2 Qf7 24.Ra6 Qb7 25.Ra3 (25.Ra1 Qc7=) 25...h6 (25...Bh4 26.Be1 Bd8 27.Qg4=) 26.Be1 Ra8 (26...Qf7 27.Ra6=) 27.Ra8 Qa8 28.h4 (28.Bc3 Qb7=) 28...Be7 29.Qg4 Qc8 30.Qg6 Qd7 31.Bg3 Bd8 32.Kh2 (32.h5 Be7+=) 32...Qf7 33.h5 (33.Qf7 Kf7 34.Kh3 g6=) 33...Bg5 (33...Qg6 34.hg6 Bg5 35.Bf2=+) 34.Qf7= Kf7 35.Bf2 ½–½. Soukup,Alois – Friml,Antonin, Klatovy op–A, 1994.

5.a3 Nb6 6.Nc3 (6.Nf3 a5=) 6...Bd7 (6...Bd6 7.Nf3=+) 7.Nf3= Bd6 8.Bd3 0-0 9.0-0 (9.Ne5 a5=) 9...a5 10.ba5 (10.b5 Qe8=) 10...Ra5=+ 11.Qd2 Ra7 (11...Qa8 12.Ne5=) 12.Nb5 (12.Ne5!?=) 12...Bb5-/+ 13.Bb5 Qe7 14.Qc3 (14.Rfb1 Rfa8-/+) 14...Ne4 (14...Rfa8 15.Rfb1-/+) 15.Qb3 Rfa8 16.Bd3 Nf6 17.Rfc1 (17.c4 dc4 18.Bc4 Nc4 19.Qc4 Ba3 20.Ba3 Ra3 21.Ra3 Ra3=+ (21...Qa3?! 22.Qc7 b5 23.Rc1=)) 17...Ba3 18.Ba3 Ra3 19.Qb2 g6 (19...Qd6 20.Ne5=+) 20.Ra3 (20.Ne5 R8a4=+) 20...Qa3 21.Qb1 Nfd7 (21...Na4 22.c4-/+) 22.Nd2 (22.Re1 c5-/+) 22...Qc3 (22...e5 23.Rd1-/+) 23.Nb3 (23.Nf3 e5 24.de5 Ne5 25.Ne5 Qe5-/+) 23...Kf8 (23...e5 24.de5 Ne5 25.Nd4-/+) 24.Kf1 (24.e4 Kg7-/+) 24...Nc4 (24...e5 25.de5 Ne5 26.Rd1-/+) 25.Ke2 (25.Kg1 e5-/+) 25...b6 26.Rd1 (26.Rf1 e5-/+) 26...Nf6 (26...c5 27.Bc4 Qc4 28.Ke1 cd4 29.Nd4-/+) 27.f3 (27.Kf1 Nb2 28.Rc1 Ra3-+) 27...h6 (27...Nb2 28.Rh1-+) 28.g4 (28.Rf1 Nb2-/+) 28...Ra3 (28...e5 29.Kf2-+) 29.h4 (29.Qc1 Nb2 30.Bb5 Ra2-+) 29...Nb2 30.Rd2 Nc4 31.Rd1 Ne8 (31...Kg8 32.h5-+) 32.Qc1 (32.Bc4 dc4 33.Qc1 Ra2-+) 32...Ra4 (32...Ra2 33.Nd2-+) 33.Qb1 (33.h5 g5-/+) 33...Ned6 (better 33...e5-+) 34.Kf2? (34.Rh1 Nb2 35.Qe1 Qc6-+) 34...Qb2?? (better 34...Nb2-+) 35.Ke2 (35.Qb2 Nb2 36.Ra1 Ra1 37.Na1 c5-/+) 35...Qb1 (35...Qa3 36.Nd2-+) 36.Rb1-/+ Nb5 (36...e5-/+) 37.Ra1 (37.Kf2!?-/+) 37...Ra1-+ 38.Bc4 (38.Na1 Nc3 39.Ke1 Ne3-+) 38...Nc3 (38...dc4?! 39.Na1 Ke7 40.g5-/+) 39.Kd2 Rd1 (39...Rh1 40.Kc3 dc4 41.Kc4 Rh4 42.Kd3-+) 40.Kc3 dc4 41.Kc4 c6 (41...Rh1 42.g5-+) 42.e4 (42.Kb4 Rh1-+) 42…Rh1 0–1. Savrda,J – Dvorak,Tomas (2115), Klatovy op–B, 1999.

5.a3 Bd6 =+.

5.a3 Be7 6.c4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 Nbd7 7.c4).

5.a3 Be7 6.Nf3 0-0 7.Bd3 b6 (7...a5 8.b5=) 8.Nbd2 (8.Ne5 Bd6=) 8...c5 9.bc5 bc5 10.dc5 (10.c4 Rb8 11.Qc2 cd4 12.Bd4 Qc7 13.cd5 Qc2 14.Bc2 Nd5 15.Ba7 Ra8+=) 10...Bc5 (10...Rb8 11.Rb1=) 11.c4 Ba6 12.0-0 Nb6 (12...Qe7=) 13.Qc1 (13.Ne5!?=) 13...Rc8=+ 14.Qc2 (14.Bf6 Qf6 15.Qb1 Rfd8=+) 14...dc4 (14...Bc4 15.Nc4 dc4 16.Be2-/+) 15.Nc4 (15.Be2 Nfd5=+) 15...Bc4-/+ 16.Bc4 Nc4 (16...Be3 17.fe3 Nc4 18.Bf6 Qf6 19.Rac1-/+) 17.Qc4 Ba3 18.Qe2 Bb2 19.Qb2 Ra8 (19...Qe7 20.Rfd1-/+) 20.Rfd1 (20.Ra6 Qe7=+) 20...Qe7 (20...Qc7 21.Rdc1 Qd6 22.Rd1-/+) 21.Qb5 (21.Ne5 Rfc8=+) 21...Rfb8-/+ 22.Qg5 h6 23.Qh4 a5 24.e4 Qb4 25.Re1 a4 26.h3 a3-+ 27.Reb1?? Qb1 28.Rb1 Rb1 29.Kh2 a2 30.e5 Nd5 31.Nd2 a1Q (32.Nb1 Qb1-+) 0–1. PawnPower – tyler_durdan, internet, 2006.

5.b5 Bb4 6.Bc3 Bd6 7.Nf3 =+.

5.b5 c6 6.c4 (6.bc6 bc6 7.Nf3 Rb8=+) 6...dc4 (6...cb5 7.cb5 Bb4 8.Bc3=) 7.Bc4 (7.bc6 Nb6=+) 7...cb5 (7...Nb6 8.Bd3=+) 8.Bb5= a6 9.Be2 Bb4 10.Nd2 Qa5 (10...0-0 11.Ngf3=) 11.Ngf3 0-0 12.0-0 b5 (12...Rd8 13.a3 Be7 14.Nc4=) 13.a3 (13.a4 ba4 14.Ra4 Qb6+=) 13...Be7= 14.Qb3 (14.Rc1 Rd8=) 14...Bb7 15.Rfd1 (15.Bc3 Qd8=) 15...Rac8=+ 16.Rac1 Rc1 (16...Rfd8 17.Qd3=+) 17.Bc1 (17.Rc1 Nb6=) 17...Nb6 (17...Rc8 18.Bd3=+) 18.Bb2 (18.Ne5 Bd5 19.Qd3 Rc8=) 18...Nbd5 (18...Bd5 19.Qd3=+) 19.e4 (19.Rc1 Rd8=) 19...Nc7 (19...Nf4 20.Bd3 Rc8=+) 20.Ng5 (better is 20.Nc4 bc4 21.Qb7+=) 20...h6-/+ 21.Nh3 (21.e5 Bd5 22.Qe3 hg5 23.ef6 Bf6=+) 21...Ne4 22.Nf4?? (better is 22.Nc4 bc4 23.Qb7-/+) 22...Nd2-+ 23.Bc3 Qa3 24.Qa3 Ba3 25.Bd2 Bd6 26.Bf3 Bf3 27.gf3 Ne8 28.Nd3 Nf6 29.Bb4 Bb4 30.Nb4 Nd5 31.Na6 Ra8 32.Nc5 Ra2 33.Rb1 Nf4 34.h4 Ne2 35.Kg2 Nd4 36.Kg3 Nf5 37.Kf4 Nh4 38.Kg3 (38...Nf5 39.Kf4-+; 38.Rb5 g5 39.Ke3 Nf5 40.Kd3 Rf2 41.Ke4-+). toll (1665) – A6648, ICC, 2003.

5.b5 Bd6 6.c4 c6 7.c5= Bc7 8.a4 (8.Nf3=) 8...cb5 (better 8...e5 9.Nf3 0-0=+) 9.ab5+= b6? (better 9...Ne4+=) 10.c6+- Nf8 11.Nf3 Ng6 12.h3 (12.Bd3 0-0+-) 12...0-0 13.Bd3 Ne4 14.Be4 (better 14.Nc3+-) 14...de4+= 15.Nfd2 (15.Ne5 Ne5 16.de5 Qd1 17.Kd1 Rd8 18.Kc2 Rd5+=) 15...f5 (15...Qg5 16.Nc3 (16.Ne4?? Qg2 17.Nf6 gf6-+) 16...Qg2 17.Ke2=) 16.0-0 (16.Qe2 Qg5 17.g3 Ne7+-) 16...Qd6 (16...Qg5 17.Qe2 a5+-) 17.g3 Nh4?? (17...Qb4 18.Qa4 Qe7+- (18...Qb2? 19.Ra2 Qa2 20.Qa2+-)) 18.Ba3+- Qd8 19.Bf8 (19.gh4?! Qh4 20.Bf8 Qh3=) 19...Kf8 20.gh4 Qh4 21.Qe2 Qh3 22.f4 (22.f3 Qh6 23.Nc4 ef3 24.Rf3 g5+-) 22...ef3?? (22...Qg3 23.Kh1 Qh3 24.Qh2 Qe3 25.Qh7 Qd4+-) 23.Nf3+- a5 (23...Qg4 24.Qg2 Qe4 25.Re1+-) 24.Qg2 Qh6 25.Qg5 Qh3 (25...Qg5 26.Ng5 h6 27.Nf3+-) 26.Qh4 (26.Nc3 h6 27.Qg2 Qg2 28.Kg2 Ke7+-) 26...Qg3 (26...Qh4 27.Nh4 Ke7 28.Nf3+-) 27.Qg3 Bg3 28.Kg2 f4 (28...Bd6+-) 29.Ne5 (29.ef4 Bf4 30.Ng5 e5 31.de5 Ke7 32.Rf4 Be6+-) 29...Ke7 (29...g5+-) 30.ef4 Bh4 31.Rh1 Bf6 32.Rh7 Kd6 33.Nc3 Ke7 34.Ne4 a4 35.Nf6 Kf6 36.Nc4 (36.Rh8 Ke7 37.Kf3 Kd6+-) 36...Kg6 37.Rg7! Kg7 38.Nb6 Rb8 39.Na4 (better 39.Nc8 Rc8 40.Ra4+-) 39...Rb5 40.Nc3 (better 40.Nc5!? Rb6 41.Ra7 Kh6+-) 40...Rb2 41.Kg3 (41.Kf3!? Rb3 42.Rc1 Rb4+-) 41...Rb3 42.Rc1 e5?? (better 42...Kf6+-) 43.fe5 Be6 (43...Rb4 44.Ne2+-) 44.Kf4 Rb4 45.Kg5 (45.Ke4 Rc4 46.Ne2 Rc1 47.Nc1 Kf7+-) 45...Rd4 46.Nb5 Rg4 47.Kh5 Rf4 (47...Rg2 48.c7 Re2 49.Rc5+-) 48.Nd6 (better 48.Rg1 Kh7 49.Nd6+-) 48...Kf8 (48...Rf3 49.Rg1 Kh7 50.Ra1+-) 49.c7 (better 49.Rb1 Rf3 50.Kg6+-) 49...Ke7 50.Kg5 (better 50.c8B+-) 50...Rg4= 51.Kh5 Rg8?? (51...Rf4 52.c8B Bc8 53.Rc8 Kd7+-) 52.Kh6 Bd7 53.Rf1 Ke6 54.Kh7 (54.Nc4 Kd5 55.Nb6 Kc6+-) 54...Rg5? (54...Rg2 55.Nc4 Bc8+-) 55.Nc4 Kd5 (55...Ke7 56.Kh6 Rg2+-) 56.Nb6 Kc6 57.Nd7 Kd7 (57...Kc7 58.Rf7 Kc6+-) 58.Rc1 (better 58.Rf7 Kc8 59.e6+-) 58...Kc8= 59.e6 Re5 60.Kg7 Re6 61.Kf7 Rh6 62.Ke7 Rh7 63.Kd6 Rd7 64.Ke6 Rh7 65.Kd6 Rh6 66.Kc5 Kc7 67.Kd5 Kd7 68.Rb1 Rh5 69.Ke4 Kc7 70.Rc1 Kd6 71.Rd1 Kc5 72.Ra1 Rh4 73.Kd3 Kb4 0–1. lucipurka (1880) – Amun (1845), lichess.org, 2016.

5.a3 c5 6.bc5 Bc5 7.Nf3 Bd6 8.0-0 Qc7 9.g3 (9.Nh4 Nb6=) 9...Nb6 10.d3 0-0 11.Nbd2 Bh3 12.Re1 Rac8 13.c4 dc4 14.Rc1 Qe7 15.Nc4 Nc4 16.dc4 Rfd8 17.Qb3 Ne4 18.Qc2 Nc5 19.Red1 b6 20.Rd5 f6 21.Nh4 Bb8 22.Rcd1 Be6 23.Nf5 Qe8 24.R5d2 Rd2 25.Rd2 Rd8 26.Rd8 Qd8 27.Nh4 Qd7 28.Bc3 Bc7 29.Bb4 Bd6 30.Bc5 Bc5 31.Bd3 g6 (31...g5 32.Nf5-/+) 32.Qb3 (32.Bg6!? hg6 33.Qg6 Kf8 34.Qf6 Qf7 35.Ng6 Ke8 36.Qh8 Qg8 37.Qh5+=) 32...Qb7 33.Ng2 Bd7 34.Ne1 Bc6 35.Be2 Qa6 The isolani on a3 becomes a target 36.Nc2 Ba4 37.Qb2 Bc2 38.Qc2 Qa3 (worse is 38...Ba3 39.c5 b5 40.Qd3+=) 39.Qd2 Qa4 40.Qd5 Kg7 41.Bf3 a5 (41...Qe8!?-/+) 42.Qb7+= Kh6 43.Bd5 Qe8 44.Bc6 Qf8 45.Qd7 Qe7 46.Qh3 Kg7 47.Qg2 f5 48.g4 f4 49.ef4 ef4 50.Qf3 Qf6 51.Kg2 Qd4 52.Bd5 (better is 52.Qe2-+) 52...a4 53.Qe2 a3 54.Kh3 (54.Kf3-+) 54...Qf2 55.Qf2 Bf2 56.c5 bc5 (56...Bc5!? 57.Kg2-+) 57.Kg2 Be3 58.Kf3 (58.g5 h6 59.h4 h5-+) 58...g5 (58...Kf6!? 59.Ke4-+) 59.Ke4 Kf6 60.Bc4 Kg6 61.h3 h5 62.Bd5 hg4 63.hg4 Kf6 64.Bc4 Ke7 65.Kf5 (65.Bd5-+) 65...f3 66.Ke4 f2 67.Ke3 f1Q! 68.Bf1 a2 69.Bd3 a1Q 0–1. mikebaldini (1725) – dc_chess (1700), gameknot.com, 2014.

5.a3 Bd6 6.Nf3 0-0 7.0-0 Nb6 (better is 7...a5!?+=) 8.Ne5 Re8 9.Ng4 (9.f4 a5 10.b5 Bf5+=) 9...Bg4 10.Bg4 Nc4 11.Bd4 b6 12.Qf3 (12.Be2 c5 13.Bc4 cd4+=) 12...Ne4+= 13.Rd1 c5 14.bc5 bc5 15.Bg7?? (better is 15.Bc3=) 15...Kg7-+ 16.d3 Nb2 (better is 16...Nf2 17.dc4 Nd1 18.Qd1 Qg5-+ (worse is 18...dc4 19.Nd2-+)) 17.de4-/+ Nd1 18.Qd1 de4 (18...Re4?! 19.Bf3 Re8 20.Bd5=) 19.Nd2 Qf6 20.Rb1 Qe5 (20...Rad8 21.h3-/+) 21.g3+= Rab8 22.Rb8 Rb8?? (better is 22...Bb8 23.Bd7 Rd8 24.Qg4 Kf8 25.Ne4 Rd7 26.Qd7 Qe4 27.Qc8 Qe8 28.Qc5 Qe7 29.Qc8 Qe8=) 23.Nc4+- Qf6 24.Qd6 Qa1 (24...Rb1 25.Kg2 Rc1 26.Qd2+-) 25.Kg2 Re8 (25...Rb1 26.Nd2 Rg1 27.Kh3 Rh1+-) 26.Qc5 1–0. mikebaldini – bacho777, gameknot.com, 2013.

5.b5 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6 5.Be2).

5.b5 Nb6 6.a4 Bg4 7.Be2 Bf3 (7...e6 8.0-0=) 8.Bf3 Nc4 (8...e6 9.d3=) 9.Qc1 (9.Bf6!? gf6 10.d3+=) 9...Nb2= ½–½. Kiss,T – Csukerda,A, HUN tt2, 1998.

5.b5 g6 6.a4 Bg7 7.Be2 0-0 8.0-0 Re8 (8...Nc5 9.d3=) 9.d4= Ne4 10.c4 dc4 11.Bc4 Nd6 (11...Nb6 12.Bd3 Nd6 13.Nbd2=) 12.Be2 e5 (12...Nb6 13.Nbd2=) 13.de5+= Ne5 14.Be5 Be5 15.Ne5 Re5 16.Nc3 Re8 17.Rc1 Be6 18.Nd5 (18.Qd4 Nf5 19.Qc5 b6+=) 18...Bd5 (18...Nb5!? 19.Bb5 c6=) 19.Qd5+- Re7 20.Rfd1 Qe8?? (20...b6 21.Bf3 Rb8 22.Qd4+-) 21.Bf3 (better 21.b6+-) 21...Re5 (21...Rd8 22.Qb3+-) 22.Qd2 (22.Qd4!? Re7 23.Qf4 Qf8+-) 22...Ne4+- 23.Be4 (23.Qd4 Re7+-) 23...Re4 24.Rc7 Ra4 25.Rb7 Rc4? (25...Rb4 26.Qd5+-) 26.h3 (26.b6 Rb4 27.Qd6 Qf8 28.Qf8 Rf8+-) 26...a4 27.Qd5 (27.b6 Qe5 28.Rd7 Rf8+-) 27...Rac8 (27...Rcc8 28.Qa2 Rcb8 29.Rb8 Rb8 30.Qa4 Rb5 31.Kh2+-) 28.Rd7 (better 28.b6 R4c5 29.Qd2+-) 28...R4c7?? (better 28...R4c5 29.Qd3 Qe6+-) 29.Rc7+- Rc7 30.b6 Re7 (30...Rc8 31.b7 Rb8+-) 31.b7 Qb8 32.Qd8 Re8 33.Qd7 a3 34.Qa4 a2 (34...Rf8 35.Rb1 Qd6+-) 35.Rd7 Rd8 (35...Rf8 36.Qa2 Qe5+-) 36.Rd8 Qd8 37.Qa2 Qd1 38.Kh2 (38.Kh2 Qd6 39.f4+-) 1–0. Glaeser,Wilfried (2105) – Cleve_Prinz,Wolfgang (1955), 17th RLP–Senioren–Open, 2019.

5.a3 Bb7 6.Be2 g6 (6...e6 7.b5=) 7.c4 Bg7 8.cd5 Bd5 9.Nc3 Bb7 10.h4 (10.0-0 0-0+=) 10...0-0= 11.h5 Nh5 12.Rh5 (better 12.d4!?=+) 12...gh5-+ 13.Nh4 e6 14.g3 c5 15.Bh5 (15.bc5 bc5 16.Rb1 Rb8-+) 15...cb4 (15...Ne5!? 16.Be2-+) 16.ab4 Ne5 17.d4 Nc4 18.Bc1 Qg5 (18...Qc7 19.Nb5 Qe7 20.Qb3-+) 19.Be2 Rad8?? (better 19...Rfc8-+) 20.Bc4+- e5 (20...Rc8 21.Qd3 a5+-) 21.d5 (better 21.e4 Qf6 22.d5+-) 21...e4+- 22.Bd2 (22.Ne4?! Qe7 23.Ra7 Qe4 24.Rb7 Qc4=) 22...b5 (better 22...Bd5 23.Bd5 Bc3 24.Bc3 Rd5+-) 23.Ne4?? (better 23.Ra7 Bd5 24.Bb5+-) 23...Qe5=+ 24.Ra7 Qe4 25.Bb5 (25.Rb7 bc4 (25...Qc4?! 26.Nf5=) 26.Qf3 Qb1 27.Qd1 Qd3-+) 25...Bd5 26.Bf1 Bc4 27.Bg2? (better 27.Bc4 Qc4 28.Qc1 Qc1 29.Bc1 Bc3 30.Ke2=+) 27...Qd3-+ 28.Ra5?? (better 28.Rc7 Bc3 29.Nf3-+) 28...Bc3 29.Rg5 (29.Ra2 Rfe8 30.Nf5 Ba2 31.Bd5 Bd5 32.Nd4 Qd4 33.Kf1-+) 29...Kh8 30.Nf3 (30.Ng6 fg6 31.Rd5 Rd5 32.f3 Bd2 33.Qd2 Qd2) 30...Bf6 (30...Rfe8 31.Re5 Re5 32.Nd4 Rd4 33.b5 Bd2 34.Qd2 Qd2) 31.Rg4?? (better 31.Ne5!? Be5 32.Re5-/+) 31...Ra8?? (better 31...Bb3 32.Bf1 Qd5-+) 32.Nd4=+ Ra1?? (better 32...Ra2 33.Bc1 Rc8 34.Qd3 Bd3-+) 33.Qa1+- Rd8 (33...Rc8+-) 34.Rf4 (34.Qc3 Qb1 35.Bc1 Rc8+-) 34...Bg7 (34...Bd4 35.Qd1 Bc3 36.Rd4 Bd4 37.g4 Bc3 38.Bc3 Qc3 39.Qd2 Qd2) 35.Kd1 (better 35.Qc3 Qb1 36.Bc1+-) 35…Qe2 (35...Qe2 36.Ne2 Bb3 (36...Ba1?? 37.Rc4 Kg7 38.Nd4+-) 37.Ke1 Ba1+-). FeegLood (2660) – Blitzstream_twitch (2620), lichess.org, 2015.

5.b5 Bb7 6.d4 e6 7.Nbd2 Bd6 8.c4 dc4 9.Bc4 Ne4 (9...a6!?=) 10.Ne4+= Be4 11.0-0 Nf6 12.a4 Qe7 (12...0-0 13.Ne5+=) 13.Bd3 Bb7 14.Re1 (14.Ne5 0-0+=) 14...Bb4 15.Rf1 Bd6 16.Qe2 0-0 17.e4 Nh5 18.g3 Rfd8 19.Bc1 Bb4 20.Bg5 f6 21.Be3 g6 22.Rfc1 Rd7 (22...Rac8 23.Bd2+=) 23.e5 Rf8 24.Bh6 (24.ef6 Nf6 25.Ne5 Rd6+/–) 24...Rf7 (24...Rfd8 25.Be4 Be4 26.Qe4+=) 25.Be4 Bd5 (25...Be4!? 26.Qe4 Rd5+=) 26.Bd5+/– Rd5 27.ef6 Qf6 28.Ne5 Ng3? (better is 28...Rd4 29.Nf7 Qf7+-) 29.hg3 g5 (29...Rd4 30.Nf7 Qf7 31.Rc6+-) 30.Nf7 Qf7 31.Rc4 Bd6 32.Re1 e5 (32...Qg6 33.Qe6 Qe6 34.Re6 Kf7 35.Rd6 cd6 36.Rc7 Kg6+-) 33.de5 Re5 34.Re4 (34.Re4 Qe6 35.Re5 Be5 36.Qf3 Qh6 37.Re5+-) 1–0. Krivoshapko,Alexander – Petrenko,Andrey, 2008.

5.Bb5 Bb7= 6.Ne5 e6 7.Qf3 Be7?? (better 7...Qe7=) 8.Bd7+- Kf8 9.0-0 Bd6 10.Bb5 c6 11.Nc6 Bc6 (11...Qc7 12.Bf6 gf6 13.Nd4 (13.Qf6?! Bc6 14.Qh8 Ke7 15.Qh7 Be5 16.Qh4 Bf6+-) 13...Bh2 14.Kh1+-) 12.Bc6 Rc8 13.b5 a6 (13...h5 14.Qe2+-) 14.a4 e5 (14...h5 15.Qh3+-) 15.Nc3 d4 (15...e4 16.Qh3 Rc6 17.bc6+-) 16.Ne4 Bb4 (16...Ne4 17.Qe4 ab5 18.ab5 de3 19.fe3+-) 17.ed4 Ne4 18.Qe4 ed4 (18...a5 19.de5 h5 20.d4+-) 19.ba6 Qd6 20.a7 Qc6 21.Qc6 (21.Qc6 Rc6 22.a8Q Ke7 23.Qc6 f6 24.Qc7 Kf8 25.Rae1 h5 26.Qc8 Kf7 27.Qh8 Kg6 28.f4 Bf8 29.f5 Kf7 30.Ba3 Ba3 31.Qe8) 1–0. GuestXFHR – GuestCQJB, freechess.org, 2020.

5.c4 e6 6.a3 c5 7.b5 (7.cd5 ed5 (worse is 7...cb4 8.de6 fe6 9.ab4+/–) 8.Bb5 a6= (worse is 8...cb4 9.Bc6 Rb8 10.Be5+/–)) 7...Bb7 8.Be2 Be7 9.0-0 0-0 10.d4 Ne4 11.Nbd2 Rc8 12.Qa4 (12.Ne4 de4 13.Ne5 Rc7=) 12...Qc7 13.Rac1 (13.Qa7?? Nd2 14.Nd2 Ra8 15.Qa8 Ra8-+) 13...cd4 14.Bd4 (14.Qa7? Ra8 15.cd5 A) 15...Ra7? 16.Rc7 Nef6 17.de6 de3 18.fe3 (18.Rd7?! Nd7 19.ef7 Kf7 20.fe3 Ba3 21.Ba3 Ra3=) 18...fe6 19.Bf6 Bf6 20.Rd7 Bf3 21.Ra7 Be2 22.Rf2 Bb5 23.Ne4+-; B) 15...Nc3 16.Qa8 Ra8-+; 14.ed4?! Nd2 15.Nd2 Qb8=) 14...e5 15.cd5? (better is 15.Bb2 Nd2 16.Nd2=) 15...Qc1-+ 16.Rc1 (16.Ne4 Qa3 17.Qa3 Ba3 18.Ne5 Ne5 19.Be5 Bd5 20.Ng3-+) 16...Rc1 17.Bf1 Nd2 (17...ed4?! 18.Ne4 de3 19.fe3 Bd5 20.Qa7 Be4 21.Qd7-/+) 18.Nd2 ed4 19.Qa7 (19.Qd4 Ba3 20.Nb3-+) 19...de3 20.fe3 Rc7 21.Qa4 Bd5 22.Qd4 Be6 23.a4 Ra8 24.g3 Nc5 25.Qe5 Rd7 26.Ne4 (26.Nc4 Na4 27.Qe4 Rd5-+) 26...Ne4 (better is 26...f6!? 27.Qc3 Ra4 28.Nf2-+) 27.Qe4 Rda7 28.Bd3 g6 (28...Ra4?? 29.Qh7 Kf8 30.Qh8) 29.Bc2 Bf5 30.Qc4 Rc8 (30...Rc8 31.Qc8 Bc8-+) 0–1. Nikolic,Jovani – Piassi,Kildare (1910), Americana op, 2009.

5.a3 a6 6.d3 Na4 (6...a5 7.b5=) 7.Bc1 (7.Bd4 e6+=) 7...Bg4 (7...a5 8.b5=) 8.Be2 e6 9.c3 (9.c4 b5=) 9...Qd7 (9...Nb6 10.0-0=) 10.0-0 (10.Ne5 Be2 11.Qe2 Qd6=) 10...Bd6 11.h3 (11.c4 dc4 12.dc4 0-0-0=) 11...Bh5 (11...Bf5 12.Qb3=) 12.Qb3 (12.Qc2 c5=) 12...0-0 (12...c5 13.c4=+) 13.Nbd2 (13.c4 c5=+) 13...b5 14.Bb2 (14.c4 c5=+) 14...Nb2 (14...c5 15.bc5 Nc5 16.Qc2-/+) 15.Qb2 c5 (15...e5 16.c4 e4 17.de4 de4 18.Nd4 Be2 19.Ne2=+) 16.bc5 (16.e4 de4 17.Ne4 Ne4 18.de4 Qc7=+) 16...Bc5 17.d4 Bb6 (17...Bd6 18.a4 ba4 19.c4=+) 18.Ne5 (18.a4 Ba5=) 18...Qd6 (18...Qc7 19.Bh5 Nh5 20.a4=) 19.Bh5 (19.g4 Bg6 20.a4 ba4+=) 19...Nh5= 20.Ndf3 (20.a4 f6 21.Nef3 ba4 22.Ra4 Bc7+=) 20...f6 (20...Qc7 21.a4 Ba5 22.Rfc1=) 21.Nd3 Rac8 (21...Bc7 22.Rfb1=) 22.Rac1 (22.a4!?+-) 22...Bc7 (22...f5 23.Qb4 Bc7 24.a4=) 23.Qb4 (23.a4 ba4 24.Qa2 f5=) 23...Qb6 (23...g6 24.a4 Rb8 25.ab5 Rb5 26.Qa4=) 24.Nc5 (24.g4 e5 25.Qb3+=) 24...e5 (24...Qd6 25.a4 Rb8 26.ab5 Rb5 27.Qa4+=) 25.Qb3 (better 25.Nd7!? Qd6 26.Nf8 Rf8 27.g4+-) 25...Qc6= 26.Rfd1 e4 (26...f5 27.Nd3 e4+=) 27.Nd2 (better 27.Ne4!? f5 28.Nc5+=) 27...f5=+ 28.Nf1 (28.a4 Bd6=+) 28...Nf6 (28...Bd6 29.a4-/+) 29.Qb2 (29.a4 ba4 30.Qa4 Qa4 31.Na4 Bd6=+) 29...f4 (29...Bd6 30.a4-/+) 30.ef4 (30.a4!?=+) 30...Bf4-/+ 31.Rc2 Bd6 32.Nb3 Nh5 33.Nbd2 (33.Ne3 Nf4-/+) 33...Nf4-+ 34.Nb3 (34.Ne3 Rf7-/+) 34...Rf6 35.g3 (better 35.Ne3-+) 35...Nh3 36.Kg2 Ng5 (36...Qd7!? 37.Ne3 Rcf8 38.Nc5 Bc5 39.dc5 Rf2 40.Rf2 Rf2 41.Qf2 Nf2 42.Rd5-+) 37.Ne3 Nf3 (37...Be7 38.Rh1-+) 38.Rh1 (38.Qa2!?-+) 38...Be7 (38...Rg6 39.Nd2 Nd2 40.Rd2 Qc3 41.Qc3 Rc3 42.Nd5 Ra3 43.Re2-+) 39.Nc5 1–0. Fournier,Frederic (1715) – fegatello (1680), Active, 2006.

5.a3 Bg4 6.h3 Bf3 7.Qf3 Qd6 8.c4 dc4 (better is 8...Nbd7+=) 9.Bc4?? (better is 9.Qb7 c6 10.Bf6 Qf6 11.Nc3+/–) 9...Nc4-+ 10.Bf6 0-0-0?? (better is 10...Qf6 11.Qb7 Nb6-/+) 11.Bd4 e5 12.Qf7 ed4 13.Qc4 de3 14.Qg4 Kb8 15.de3 Qa6 (15...Qd5 16.0-0 Qe5 17.Ra2=) 16.Nd2+= Be7 17.Qc4 (17.Qg7? Bf6 18.b5 Qd6-+) 17...Qg6 18.Rc1 (18...Qg2 19.Qc7 Ka8 20.Rh2=). b4_player (2150) – JULION12 (1800), GameColony.com, 2004.

5.a4 e6 6.a5 Nc4 7.Bc4 dc4 8.b5 Bc5 9.0-0 (9.Qe2 a6 10.ba6 Ra6+=) 9...Bd7 (9...a6 10.ba6 Ra6 11.Qe2+=) 10.a6 (10.Nc3 Bb4+=) 10...b6 (10...ba6 11.ba6 Rb8 12.Ba3=) 11.Nc3+= 0-0 (11...Bb4 12.Rb1+-) 12.Qe2+- Nd5 (12...c6 13.Qc4 Rc8 14.Qb3+-) 13.Qc4 Nc3 14.Bc3 (14.dc3?! Qe8 15.Qh4 Bb5=) 14...Qe8 15.Rfb1 f6 16.d4 (16.d4 Bd6 17.e4+-) 1–0. GuestJKVR – GuestFWGY, freechess.org, 2020.

5.bc5 Qa5 6.c4 e6= 7.cd5 ed5 8.Qb3 (8.Bc3 Qc5 9.Bd4 Qa5=) 8...Bc5 (8...Nc5 9.Qb5 Qb5 10.Bb5 Bd7 11.Bd7 Ncd7 12.Bd4=) 9.Bf6 (9.Ne5 Be7=) 9...Nf6 10.Bb5 Ke7 11.0-0 (11.Nc3 Be6=) 11...Be6 (11...Qb4 12.d4 Qb3 13.ab3=) 12.d4 Bd6 13.Bd3 Rab8 (13...Qb4 14.Qd1=) 14.Nc3+= a6 (14...Qb4 15.Nb5+=) 15.Ng5 (15.Rfc1 Rhc8 16.Rab1 Qa3=) 15...Rhc8 (15...Qa3 16.g3=) 16.Rfc1 (16.Ne6? Rc3 17.Qb1 fe6-+) 16...b5 17.Ne6 (17.Rab1 Qa3+=) 17...fe6= 18.e4 (18.Rab1!?=) 18...Bb4=+ 19.Nd5 (19.Nd1 de4 (19...Ne4?! 20.Be4 de4 21.Rab1=) 20.Rc8 Rc8-/+) 19...ed5-/+ 20.e5 (20.Rc8 Rc8 21.e5 Ne4 22.Qd5 Ng5 23.Qb7 Rc7-/+) 20...Ne8 (20...Nh5 21.Qd5 Nf4 22.Qe4 Nd3 23.Rc8 Rc8 24.Qd3-/+) 21.Qd5 (better is 21.Rc8 Rc8 22.Qd5-/+) 21...Qd8 (better is 21...Rd8!? 22.Qb3 Qa3-/+) 22.Qe4= Bc3?? (better is 22...Nc7=) 23.Qh4+- Kf8 24.Qd8+/– Rd8 25.Rc3 g6 26.h4 Rd4 27.h5 b4 28.Rb3 a5 29.Bc2 gh5 30.Bh7 Kg7 31.Bc2 Nc7 32.Rg3 (White gets kings attack) 32...Rg4 33.Rg4 hg4 34.Bf5 g3 35.fg3 a4 36.Rd1+- Nb5 37.Rd7 Kh6 38.g4 Rh8 39.Rb7 b3 40.ab3 a3 41.Rb5 Ra8 42.Rb6 Kg7 43.Rb7 Kg8 44.Bb1 a2 45.Ba2 Ra2 46.e6 Re2 47.e7 Kf7 48.Kh2 Re3 49.b4 (49...Ke8 50.b5+-) 1–0. Lorenc,Tomas (2175) – Navratil,Frantisek (2210), CZE–chTV, 2001.

5.bc5 Qa5 6.Be2 e6 =.

6.Nc3 Nce4 =.

6.Bf6 gf6 7.Bb5 Bd7 8.Bd7 Qd7 9.d4 =.

7.a4 Bb5 8.ab5 Qb6 9.0-0 (9.Qe2 a5+=) 9...g6 (9...Qb5!? 10.Bf6 gf6=) 10.Bd4+= e6?? (better is 10...Bg7+=) 11.Bf6+- Rg8 12.Nc3 Bg7 13.Bg7 Rg7 14.d4 Ne4 15.Ne4 de4 16.Ne5 f6 17.Nc4 Qb5 (17...Qc7 18.Ra4 a6+-) 18.Nd6 (18...Kf8 19.Nb5+-) 1–0. b4_player – gos63, gamecolony.com, 2006.

7.a4 Bb5 8.ab5 Qb6 9.Nc3 e6 10.0-0 Bd6 11.d4 (11.Qe2 0-0=) 11...Nce4=+ 12.Qe2 Nc3 (12...0-0 13.Ne4 Ne4 14.c4 dc4 15.Qc4=) 13.Bc3= Ne4?? (better 13...Qc7 14.Bb2 0-0=) 14.Ba5+- Bh2 15.Nh2 Qd6 16.c3 Qe7 (16...Rc8 17.Bb4 Qb6 18.Ra3+-) 17.Bb4 Qf6 (17...Qc7 18.Ra3+-) 18.Nf3 h5 (18...Qd8+-) 19.b6 a6 20.Ne5 (better 20.Qb5 ab5 21.Ra8 Qd8 22.Rd8 Kd8 23.Ra1+-) 20...h4 (20...Qd8 21.Qd1 Nf6 22.Qa4 Nd7 23.e4+-) 21.Ra5 (21.Qb5 ab5 22.Ra8 Qd8 23.Rd8 Kd8 24.Ra1 Nd6 25.Bd6 h3 26.Ra8) 21...h3 (21...Rc8 22.Ng4 Qg5+-) 22.Ra6 (better 22.Qb5! ab5 23.Ra8 Qd8 24.Rd8 Kd8 25.Nf7 Kd7 26.Nh8+-) 22...ba6-+ 23.Ra1 (23.g3 h2 24.Kh1=) 23...h2 24.Kh1 Nf2 25.Qf2 Qf2 26.b7 Rb8 27.Nf3 Rb7 28.Nh2 Qe3 (28...Qe3 29.Ba3 Qg3 30.Kg1 Rh2 31.Kf1 Qg2 32.Ke1 Qe2) 0–1. GuestLXMK – Guestjag, freechess.org, 2017.

7.a4 Bb5 8.ab5 e6 9.0-0=.

7.a4 Qb6 8.Nc3 g6? (better is 8...e6=) 9.Nd5!+- Nd5? (better is 9...Qd6 10.Bc4 Rc8+-) 10.Bd7 Kd7 (10...Nd7 11.Bh8 Qc7 12.0-0+-) 11.Bh8 Bh6 (11...f6 12.0-0+-) 12.Rb1 Qa6 13.Bd4 Na4 (13...Rc8+-) 14.c4! Ndb6 (14...Qc4 15.Ne5) 15.Ra1 (15...Ke8 16.c5+-) 1–0. marekt – KenAdams, ChessHere.com, 2005.

7.a4 e6 8.Be5 =.

7.Bd7 Qd7 8.0-0 g6 (8...Qf5 9.Nc3=) 9.Bd4 (better 9.Bf6 ef6 10.Nd4+=) 9...e6?? (better 9...Rc8+=) 10.Bf6+- Rg8 11.Ne5 (11.Nc3 Na4+-) 11...Qc7 12.Nc3 a6 13.Qg4 1–0. DEFFM – flavo, freechess.org, 2018.

7.Bd7 Ncd7 8.0-0=.

7.Be2 e6 =.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.c4 Qc7 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Qc7 5.c4 Nbd7).

5.c4 e6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 c6).

5.a3 e6=.

5.d3 Nd6 6.c4+= dc4 7.dc4 b6 (7...c5 8.a3+=) 8.Bd3 a5 9.a3 ab4 (9...Bb7 10.Nbd2 e5 11.Be5 Ne5 12.Ne5+=) 10.ab4 Ra1 11.Ba1 e5 (11...c5 12.b5+-) 12.Ne5 c5 (12...Ne5 13.Be5 f6 14.Bc3+-) 13.Nc6+- Qg5 14.0-0 Qh6? (better 14...cb4 15.Nb4 Bb7+-) 15.b5+- Bb7 (15...Nf6 16.Qa4 Be7 17.Qa7+-) 16.Nc3 Nc8 17.Nd5 Bc6 18.bc6 Nb8 (18...Qc6 19.Bc2 Nd6+-) 19.c7 Bd6 20.f4 0-0 (20...Nc6 21.Qa4 0-0 22.Qc6+-) 21.cb8Q Bb8 22.Qg4 Bd6 23.Nf6 Kh8 24.Rf3 b5 25.Rh3 Qh3 (25...Bf4 26.ef4 Ne7 27.Rh6 gh6 28.Ne8 f6 29.Qg7) 26.Qh3 h6 27.Qf5 g6 28.Nd7 Kg8 (28...Be5 29.Be5 f6 30.Qg6 Rf7 31.Qf7 fe5 32.Qh7) 29.Qf6 (29.Qf6 Be5 30.Be5 bc4 31.Qg7) 1–0. Massudy (2450) – SusiSwift (2240), lichess.org, 2020.

5.Be2 e5 6.Ne5 (better is 6.a3=) 6...Qf6 (better is 6...Ne5 7.Be5 Qg5+=) 7.Nd3+/– Qd8 (7...Qh6 8.0-0+/–) 8.0-0 f6 (8...Qh4 9.Nc3 c6 10.f4+/–) 9.a3 (9.Bd4 Bd6+/–) 9...Be7 (9...Nb6 10.Bd4+/–) 10.Nf4+- White is in command 10...Ne5 (10...Nb6!?+-) 11.d3 Ng5 12.Nh5 0-0 (12...g6 13.f4 gh5 14.fe5 0-0+-) 13.f4 Nh3 (13...Ngf7 14.fe5 fe5 15.d4+-) 14.gh3 Bh3 (14...Nf7 15.Bg4 Nh6 16.Bc8 Rc8 17.Qf3+-) 15.fe5 Bf1 16.Qf1 (16.Kf1?! fe5 17.Kg2 Bh4+-) 16...fe5 17.Qg2 (17.Qh3 Bd6+-) 17...Bf6 Black intends d4 (17...Bg5 18.Be5 Be3 19.Kh1+-) 18.Nd2 (better is 18.Nf6 Qf6 19.Qd5 Rf7 20.Kh1+- (20.Qb7 Qf2 21.Kh1 Qe1 22.Kg2 Qe2 23.Kg3 Qe3 24.Kh4 Rf4 25.Kg5 Qg1 26.Qg2 Qg2 27.Kh5 Qg4)) 18...d4 (18...Bg5 19.Be5 Be3 20.Kh1 g6+-) 19.Ne4 Qe7 20.Nef6 Rf6 21.Nf6 Qf6 22.Rf1 Qc6 (22...Qd6 23.Qb7 Rd8 24.Qa7 Qg6 25.Kf2+-) 23.Qc6 bc6 24.ed4 ed4 25.Bd4 Re8 26.Bf3 Re6 27.Ba7 Rg6 28.Kh1 h6 29.Re1 (29.Re1 Rf6 30.Kg2 Rg6 31.Kf2+-; 29.a4 Rf6+-) 1–0. Woelfelschneider,Peter – Willoughby,Peter, FICGS, 2006.

5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

5.Ne5 Bb4 6.Nd3 Bd6 7.Be2 0-0 8.Ba3 Ba3 9.Na3 Re8 10.c4 b6 11.0-0 Bb7 12.Ne1 Qe7 13.Nb5 Nc5 14.d4 Nce4 15.Qc2 a6 16.Nc3 dc4 17.Bc4 h5 (17...c5 18.dc5 Rac8 19.Ne4 Be4 20.Qe2+=) 18.Be2 (18.Rb1 Rac8=) 18...Ng5 (18...c5 19.dc5 Qc5 20.Ne4 Ne4 21.Qb2=) 19.Rd1 Qd6 20.h3 Qc6 (20...Rad8 21.Qf5 Nge4 22.Ne4 Be4 23.Qg5=) 21.Nf3 Rab8 (21...Nf3? 22.Bf3 Ne4 23.Be4 Re4 24.d5+-) 22.Rc1 Nf3 23.Bf3 Qd7 24.Bb7 Rb7 25.Na4 Ne4 26.Qc6 Qc6 27.Rc6 Re7 28.Rfc1 g6 29.Nb2 Ng5 30.Nd3 Ne6 (30...Rd7 31.Ne5 Re7 32.Kf1+/–) 31.Nb4 a5 (better is 31...Rd7!?+/–) 32.Nd5+- Kf8 33.Ne7 Ke7 34.d5 Nc5 35.Rc4 f6 36.Rf4 Nd7 37.g4 hg4 38.hg4 g5 39.Re4 Kf7 40.f4 gf4 41.ef4 b5 42.Rce6 Nc5 Black plans a4 (42...Kg6 43.f5 Kg5 44.Re7+-) 43.Re7 Kg6 44.Re3 b4 45.Rh3 a4 (45...c6 46.Rb7 Nb7 47.dc6 Nd6+-) 46.Reh7 1–0. algernon (2325) – sgp (2405), net–chess.com, 2016.

5.Ne5 Bb4 6.Nd7 Bd7 =.

5.Ne5 Ne5 6.Be5 Bb4 7.a3 Bd6 8.Bb2 0-0 9.Be2 c5 10.0-0 Be6 11.d3 Nd7 12.Nd2 Be5 (12...Qc7 13.Nf3=+) 13.c3 (13.Be5 Ne5 14.f4 Nc6=) 13...Nf6 14.d4 cd4 15.ed4 (15.cd4 Bd6=) 15...Bd6=+ 16.Nf3 Rc8 17.Ng5 (17.Re1 Re8=+) 17...Qc7-/+ 18.h3 Bf5 19.Bd3 Bd3 20.Qd3 h6 21.Nf3 Qc4 22.Qf5 (22.Qc4 Rc4 23.Ne5 Rc7=+) 22...Rfe8 23.Rfe1 Re1 24.Re1 Qc7 25.Ne5 Re8 26.f3 (26.Re3 Ne4=+) 26...Re6 (26...Ba3!? 27.Qc2 Bc5-+) 27.a4 Qe7 0–1. GuestLXMK – Trifasica, freechess.org, 2017.

5.Ne5 Ne5 6.Be5 Bb4 7.Nc3 c6 8.Qf3 Qe7 9.Bf6 gf6 10.Ne2 Rg8 11.Nd4 Bg4 (11...Bd6 12.h3=) 12.Qg3 0-0-0 (12...Bc5 13.c3 Rg5 14.Qh4=) 13.Bd3 (13.Rb1 Bd6 14.Qh4 Be5+=) 13...h5 (13...Be6 14.Qf3=) 14.c3 Bc5 15.Bh7 Bd6 (15...Rh8 16.Bf5 Bf5 17.Nf5=) 16.Nf5 Bf5 17.Bf5 Kb8 18.Qf3 h4 19.Rb1 Rh8 20.0-0 Rdg8 21.Qh3 Rh5 22.f4 Bc5 (22...Ka8 23.a4+=) 23.a4 Qc7 24.Rb2 Qa5 25.Bd3 f5 26.Rfb1 b6 27.Be2 Rh7 28.Qf5 Rhg7 29.Bf3 Ba3 (better is 29...Kc7!?+/–) 30.Ra2+- Bc5 31.c4 dc4 (31...Bb4 32.cd5 h3 33.Qd7+-) 32.Qe5 Kc8 33.Qe4 Rg6 (33...Qa6 34.Qc6 Kd8 35.Qf6 Kd7 36.a5+- (36.Qh4?! c3+-)) 34.Qc4 h3 (34...Re6 35.Rc2 Kd8 36.f5+-) 35.d4 1–0. marekt – Bill Kargel, ChessWorld.net, 2004.

5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

5.a3 c5 6.b5 Bd6 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4 Nbd7).

5.a3 c5 6.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nbd7).

5.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7).

5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Bb4 9.Be2= 0-0 10.0-0 c5 11.c4 b6 12.d4 Bb7 13.Nbd2 (13.dc5 Nc5 14.cd5 Nd5=) 13...Qc7 14.Qb3 Ra8 15.Bb2 h6 (15...Ng4 16.dc5 bc5 17.Rd1=) 16.h3 (16.Ra1 Ra1 17.Ba1 Bd2 18.Nd2 cd4 19.Bd4 e5=) 16...Ne8 (16...Bd2 17.Nd2 cd4 18.ed4 dc4 19.Nc4=+) 17.dc5 Bc5 18.cd5 Bd5 19.Bc4 Ndf6 20.Rc1 Qb7 21.Bd5 Nd5 22.Nc4 f6 (22...Nd6 23.Nd6 Bd6 24.Qc4+=) 23.Nd4 Qf7 24.Rd1 Nec7 25.Nc6 e5?? (better 25...Qh5=) 26.e4+- Nf4 27.Nd8 Qf8? (27...Rd8 28.Rd8 Kh7+/-) 28.Nb6 Kh7 29.Na8 Qe8 (29...Na8 30.Ne6 Ne6 31.Qe6 Nb6+-) 30.Nc7 (30.Nc7 Qh5 31.Rd7 Bf2 32.Kh2+- (32.Kf2?? Qe2 33.Kg3 Qg2 34.Kh4 Qg5)) 1-0. onur604 (2320) - comfortable (2310), Casual Rapid game, lichess.org, 2021.

5.b5 b6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Nbd7 5.Nf3 b6).

5.b5 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

5.b5 c5 6.c4 b6 7.a4 Bb7 8.Be2 Bd6 9.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.b5 Bc5 6.d4= Bb4 7.Nbd2 Nb6 (7...c6 8.bc6 bc6 9.a3=) 8.a4 Bd2 (8...0-0 9.Bd3+=) 9.Nd2 (worse 9.Kd2 Ne4 10.Ke1 0-0=) 9...Qd6? (better 9...Bd7!?+=) 10.Ba3+- Qd7 11.a5 Nc4 12.Nc4 dc4 13.Bc4 Ne4 (13...a6 14.Qe2 ab5 15.Bb5+-) 14.Bd3 Nc3 (14...Nd6 15.Qh5+-) 15.Qh5 Nb5 (15...a6+-) 16.Bb5 c6 17.Bc4 b5 18.ab6! ab6 19.0-0 Ba6 (19...Ra4 20.Bd3 Ra5+-) 20.Ba6 Ra6 21.Qe5 f6 (21...Rg8 22.Qb8 Qd8 23.Qb7+-) 22.Qb8 Qd8 23.Qb7 Qa8 1-0. DEFFM – GuestHTYK, freechess.org, 2021.

5.b5 c6 6.a4 cb5 7.ab5= Qb6 (7...Bd6 8.d4=) 8.Be2 Bd6 9.0-0 Ne4? (better 9...e5!?=) 10.Bg7+- Rg8 11.Bd4 Qc7 12.d3 (worse 12.Ba7 b6=+; worse 12.Ra7 Ra7 13.Ba7 b6=+) 12...Ng5 (12...Nec5 13.Nbd2+-) 13.Ng5 Rg5 14.f4 (worse 14.Ra7 Ra7 15.Ba7 b6=+) 14...Rg8 15.c4 (15.Nd2 Bc5+-) 15...dc4 16.dc4 (16.Nc3 cd3 17.Qd3 f5+-) 16...b6 (16...e5 17.fe5 (17.Ra7?! Ra7 18.Ba7 b6+=) 17...Be5 18.Kh1+- (18.Ra7? Bh2 19.Kh1 Qg3-+)) 17.g3 (17.Bd3 Bb7 18.Ra2 e5 19.fe5 Ne5 20.Bh7 Rg7+-) 17...Bb7 (17...Nc5 18.Qc2 f5 19.Nc3+-) 18.Bd3 Nc5? (better 18...e5 19.Bh7 Rg7 20.fe5 Be5+-) 19.Bh7+- Rf8 20.Bg7 Ne4 (20...0-0-0 21.Bf8 Bf8 22.Qg4+-) 21.Bf8 (better 21.Nd2 Nc5 22.e4+-) 21...0-0-0 (21...Bf8 22.Be4 Be4+-) 22.Be4 Be4 (22...Bf8 23.Qf3 Be4 24.Qe4+-) 23.Bd6 Rd6 24.Ra7! Qc4 (24...Qa7 25.Qd6 Deflection (25.Qd6 Overloading)) 25.Qd6 (25.Qd6 Qc5 26.Qd7 Kb8 27.Ra3+-) 1–0. DEFFM – GuestPKTL, freechess.org, 2018.

5.b5 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

5.Be2 Bb4 6.0-0 0-0 7.c4 dc4 8.Bc4 Nb6 9.Qb3 (9.Be2 Bd7-/+) 9...Nc4 (9...Bd6 10.Na3-/+) 10.Qc4 (10.Qb4 Nb2 11.Qb2 b6-/+) 10...Bd6 11.Nc3 (11.e4 b5 12.Qe2 Nd7-/+) 11...e5 12.d4 (12.Nb5 Be6 13.Qh4 Ng4-/+) 12...e4 13.Nd2 Re8 14.d5 c6 15.Rfd1 (15.dc6 Bh2! 16.Kh2 Ng4 17.Kg3 Qd6 (17...Qd2?! 18.cb7 Bb7 19.Kg4-/+) 18.f4 Qd2 19.cb7 Ne3-+ (19...Qe3 20.Kh4 Nh6 21.bc8B Rac8 22.Qb5-+)) 15...cd5 16.Qb3 Bh2! 17.Kh2 Ng4 18.Kg1 Qh4 (19.Nde4 de4-+ (19...Re4?! 20.Ne4 de4 21.Rd2-+)) 0–1. St_Jean,Benoit – McDowall,Michael, CC.2003.0.00064, 2003.

6.a4 0-0 7.c4 Qe7 8.Be2 dc4 9.Bc4 a6 10.0-0 ab5 11.ab5 Ra1 12.Ba1 b6 (12...e5 13.d3=+) 13.d4 Bb7 14.Nbd2 Rd8 15.Bd3 e5 16.de5 Ne5 17.Ne5 (17.Be5 Be5 18.Qc2 Bd6=) 17...Be5 18.Be5 (better 18.Qc2!?=) 18...Rd3-/+ 19.Bf6 Qf6 20.Qe2 Rd7 (20...Qg5!? 21.Nf3 Qb5-/+) 21.f3 Qd6 22.Nc4 Qc5 23.Nb2 (23.Rb1 Bd5 24.Nb2 Re7=+) 23...h6 (23...Re7 24.Na4 Qe3 25.Qe3 Re3 26.Rd1-/+) 24.Kh1 (24.Rb1 Re7 25.Nd1 Bc8=) 24...c6 (24...Rd5 25.Rb1 Qb5 26.Qe1-/+) 25.bc6=+ Qc6 (25...Bc6 26.Rg1=+) 26.Rd1 (26.e4 Qc5=) 26...Rd1=+ 27.Nd1 b5 28.Qd2 Qc4 29.Nb2?? (29.Kg1=+) 29...Qc6 (29...Qf1) 30.Nd3 (30.Nd1 f5=+) 30...Qd6 31.h3 b4 32.Qb4 Qd3 33.Qb7 Qe3 34.Qa8 Kh7 35.Qa1 Qf4 36.Qf1 h5 37.Kg1 h4 38.Qf2 Qc1 39.Kh2 Qf4 40.Kg1 Qc1 41.Qf1 (41.Kh2 g5=+) 41...Qf1=+ 42.Kf1 Kg6 43.Kf2 Kf5 44.Ke3 g5 45.Ke2 Kf4 46.Kf2 f6 47.Ke2 Ke5 48.Ke3 f5 49.f4 gf4 50.Kf3 Ke6 51.Kf4 Kf6 52.Kf3 Kg5 53.Ke3 Kg6 54.Kf4 Kf6 55.Kf3 Kg6 56.Ke3 Kg5 57.Kf3 Kf6 58.Kf4 Kg6 59.Ke5 Kg5 60.Kd4?? (60.Ke6 Kg6=) 60...Kf6 (better 60...Kf4-+) 61.Ke3 Ke5 62.Kf3 Ke6 63.g3 Kf6 64.g4 fg4 65.Kg4 Kg6 66.Kh4 Kh6 67.Kg4 Kh7 68.Kf5 Kh8 69.Kg5 Kg8 70.Kh6 Kh8 71.Kg6 Kg8 72.Kh6 Kh8 73.Kh5 Kg8 74.Kg5 Kh8 75.h4 Kg8 76.Kf6 Kh8 77.Kg6 Kg8 78.Kh6 Kh8 79.Kh5 Kg8 80.Kg5 Kh8 81.Kg4 Kg8 82.Kh3 Kh8 83.Kg3 Kg8 84.Kf3 Kh8 85.Kf2 Kg8 86.Kg2 Kh8 87.Kh2 Kh7 88.Kg1 Kh6 89.Kh1 Kh5 90.Kg2 Kh4 ½-½. BeepBeepImAJeep (2715) - pohyi (2250), lichess.org, 2016.

6.a4 0-0 7.Be2 c6 (7...c5 8.bc6 bc6 9.Nc3=+) 8.c4 (8.0-0 e5=+) 8...Qc7 (8...cb5 9.cb5 e5 10.0-0=+) 9.0-0 (9.cd5 Nd5 10.0-0 e5=) 9...dc4 (9...e5 10.Ba3=+) 10.Bc4 (10.Na3 e5 11.Nc4 e4 12.Nd6 Qd6=) 10...cb5 (10...Ng4 11.h3 Nde5 12.Be5 Ne5 13.Ne5 cb5 14.Bb5 Be5 15.d4 Bh2 16.Kh1=) 11.Bb5 Qb6 (11...e5 12.Qc1=+) 12.Bd4 (12.Na3 Qd8=) 12...Qa5 (12...Qd8 13.d3=) 13.Bc3 Bb4 (13...Qd8 14.d4=) 14.Qb3 Bc3 15.Nc3 (15.Qc3 Qc3 16.Nc3 a6 17.Bd7 Bd7+=) 15...b6 (15...a6 16.Bd7 Bd7 17.d4= (17.Qb7?? Rfb8 18.Qb8 Rb8-+)) 16.d4+= Bb7 (better is 16...a6 17.Qb2 Bb7+= (17...ab5? 18.ab5 Bb7 19.Nd2+-)) 17.h3 (17.Nd2!? Bd5 18.Nd5 ed5 19.Qd3+=) 17...a6 (17...Bf3 18.gf3 a6 19.Be2=+) 18.Bd3 (18.Be2!?=) 18...Rac8 (18...Bf3 19.gf3 e5 20.Be4=+) 19.Rfc1 (19.Na2 Bf3 20.gf3 Nd5=+) 19...Rc7 (19...Bf3!? 20.gf3 e5-/+) 20.Nd2= Rfc8 21.Nc4 Qg5 22.g3? (22.e4 Be4 23.Ne4 Ne4 24.Be4=+) 22...Nd5?? (better is 22...Bd5 23.Nb1 e5-+) 23.Ne4+= Qe7 24.Rc2 Nb4 25.Ned6 Nc2 26.Qc2 Qd6 27.Nd6 Rc2=+ 28.Nc8?? Rc8-+ 29.Rb1 Kf8 30.a5 b5 31.Kf1 Nf6 32.Ke2 Be4 33.Be4 Ne4 34.Kf3 Nd2 (35.Kf4 Nb1-+) 0–1. Durgashankar,Giridharan – Dresher,Kevin (1775), Dos Hermanas Internet Section, 2003.

6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3).

6.c4 0-0 7.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.d4).

6.c4 0-0 7.Be2 c5 8.0-0 b6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6).

6.d4 c5 7.c4 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.d4).

6.d4 Qe7 7.c4 dc4 8.Bc4 Nb6 9.Be2 (9.Bd3 0-0=) 9...Bd7 (9...0-0 10.0-0=) 10.Nbd2 0-0 (10...c6 11.bc6 Bc6 12.Ne5=) 11.0-0 (11.e4 Bb4 12.a3 Bd2 13.Nd2 a6 14.ba6 ba6=) 11...c6 12.a4 cb5 13.ab5 Rfc8 14.Qb3 Nfd5 (14...Nbd5 15.e4 Nf4 16.Bc4+=) 15.Rfc1 (15.Ne4 Bb8+=) 15...Nc7 (better is 15...Qe8+=) 16.Ba3 (better is 16.Ne4+=) 16...Ba3=+ 17.Ra3 Bb5 18.Bb5 (18.Qb5 Nb5) 18...Nb5 19.Raa1 a6 20.Ne5 (20.Ne4 Rc1 21.Rc1 Nd7=+) 20...Nd5 21.Ne4 Qb4 (21...b6 22.Rc8 Rc8 23.Nc4=+) 22.Qb4 (22.Qd1 Rc1 23.Rc1 Qe7=+) 22...Nb4 (22...Rc1 23.Rc1 Nb4 24.Kf1-/+) 23.h3 (23.Nc5 Rc7-/+) 23...Nd5 (23...Rc1 24.Rc1 f6 25.Nc4-/+) 24.Nc5 (24.Rc8 Rc8 25.Nd3 Rc7-/+) 24...b6 25.Ne4 (25.Na4 Nd6-/+) 25...a5 26.Kf1 Kf8 27.Ke1 f6 28.Nf3 Ke7 29.Ned2 Nb4 30.Rc4?? Nc2 31.Rc2 Rc2 32.Rb1 Nc3 33.Ra1 Rc8 34.Ng1 a4 35.Ne2 b5 36.Nf4 b4 37.Nd3 Na2 38.Nc5 Ra8 39.Kd1 b3 40.f4 Nc3 41.Ke1 b2 42.Ra3 Rd2 (43.Kd2 b1Q 44.Rc3 a3-+) 0–1. Seitz,Dan – Norman,Ricky, Arlington CC–ch, 1999.

5.a3 Bg7 6.c4 dc4 7.Bc4 0-0 8.0-0 Nb6 9.Be2 c6 10.d4 e6 (10...Bf5!?=) 11.Nbd2 Nfd5 12.Nc4 Nc4 13.Bc4 Nf6 14.Rc1 b5 (14...Nd5 15.Qe2+=) 15.Bd3+/– Bb7 16.Qb3 (16.Ne5 Qd6+/–) 16...a5+= 17.Rfd1 a4 (17...Qd5 18.Qc3+=) 18.Qc2+/– Qd7 (better is 18...Rc8!?+/–) 19.Ne5+- Qd5 20.f3 (20.Nc6 Rfe8 21.Qc5 Qc5 22.Rc5+- (22.bc5? Bc6 23.Rb1 Rab8-+)) 20...Rac8+/– 21.e4 Qd8 22.Bf1 Nd7 23.Nd7 Qd7 24.Qf2 Rfd8 25.Rd2 e5 26.Rcd1 ed4 27.Bd4 Bd4 28.Rd4 Qe7 29.Qd2 Rd4 30.Qd4 Qg5 (30...c5 31.bc5 Qc5 32.Qc5 Rc5 33.Rd7=) 31.h3 h5 32.Qd7 Qe3 33.Kh1 Qb6 34.Qe7 Rf8 35.Rd7 Ba8 (35...Bc8!? 36.Rd6 Qf2 37.Bb5 cb5=) 36.Bd3 Qe3 37.Qf6 Qc1 38.Kh2 Qa3?? (better is 38...h4+/–) 39.e5+- Qc3 (39...Qa2 40.Bg6 Qe6 41.Bh7 Kh7 42.Qe6 h4 43.Qf5 Kh8 44.Qh5 Kg7 45.Qg5 Kh7 46.Rd4 c5 47.Rh4) 40.Bg6! h4 (40...fg6 41.Qg7) 41.Bf7 (41.Bf7 Rf7 42.Qf7 Kh8 43.Qg7) 1–0. Fournier,Frederic (1990) – Voronkov,Maksim A, ChessOK.com, 2013.

5.a4 Bg7 6.c4 c6 7.Qb3 0-0 8.d3 Re8 9.Ne5 (9.cd5 cd5 10.Nc3 a5=) 9...Ne5 10.Be5 Be6 11.Nc3 Rc8 (11...dc4 12.dc4 Ne4 13.Rd1 Be5 14.Ne4=) 12.d4 a5 13.c5 Ne4 14.Bg7 Kg7 15.f3 Nf6 16.Kf2 (16.ba5 Qa5 17.g4 Bd7+=) 16...h5 (16...b6!?=) 17.Bd3+= Rb8 18.b5 b6 19.bc6 (19.Qc2!?+=) 19...bc5= 20.Bb5 cd4 21.ed4 Qb6 (21...Qc7!?=) 22.Ne2+= Red8 23.Qa3 Qc7 24.Rab1 Bf5 25.Rb2 e5 26.de5 Qe5 27.Rd2 Re8 (27...Be6!?=) 28.Qc3+/– Re7 29.Qe5 (< 29.Qa5 Qe3 30.Ke1 d4=+) 29...Re5 30.Nd4 Kf8 31.Rc1 (31.Nf5 Rf5 32.c7 Rc8+/–) 31...Bc8 32.Nb3 Ra8 33.Nc5 Ra7 34.Nd3 Rf5 35.Kg1 Rc7 36.Re2 (36.Nc5 Re5+/–) 36...Ne8 (36...h4!?+=) 37.Ne5+/– Be6 38.Ng6! Kg7 (38...fg6 39.Re6) 39.Ne5 Nd6 40.Rce1 Rg5 41.Nd3 (41.h4 Rf5+-) 41...Kf6 (41...d4 42.Ne5+/–) 42.Nc5+- Bf5? (better is 42...Bc8+-) 43.Nd7 Kg7 44.Nb6 (better is 44.Re5 d4 45.Rd5+-) 44...Be6 45.Re5 Rg6? (better is 45...Rf5+-) 46.Nd5 Rc8 (46...Bd5 47.Rd5 h4+-) 47.Ne7 (47...Rh6 48.Nc8 Bc8 49.Bd3+-) 1–0. De Visser,Arno – Bergman,E, 1992.

5.b5 Bg7 6.a4 0-0 7.c4 c6 8.Be2 Re8 9.d4 Ne4 10.0-0 Ndf6 11.Nbd2 Bf5 12.Rc1 h6 13.Ne5 Rc8 14.bc6 bc6 15.cd5 cd5 (15...Qd5?? 16.Bc4 Qd6 17.Bf7 Kf8 18.Ndc4+-) 16.Bb5 Rf8 17.Ba3 Nd2 (17...Nc3 18.Qb3 Nb5 19.ab5 Rc1 20.Rc1 Re8+/-) 18.Qd2 Ne4 19.Qb4 Be5 20.de5 Rc1 (20...Rc7 21.Rc7 Qc7 22.f3+-) 21.Rc1+- (21.Bc1?! Qc7+=) 21...Qb6 (better 21...a5 22.Qe7 Qe7 23.Be7 Rb8+-) 22.Qe7 Rb8 23.Be8 (23.Rc7 Be6 24.Ra7 Nc3+-) 23...Be6 24.h3 (better 24.Rc7!? Qb3 25.Bf7 Kh8 26.h3+-) 24...d4+/- 25.Rc7 (better 25.Bc6!? de3 26.fe3 Qe3 27.Kh2=+) 25...de3= 26.Bf7 (26.Qf8!? Kh7 27.Rf7 Bf7 28.Qf7 Kh8 29.Qf8 Kh7 30.Qf7 Kh8 31.Qf8 Kh7 32.Qf7=) 26...Kh8-/+ 27.Be6?? (27.Kh2 ef2 28.Rc1-+) 27...ef2 28.Kh2 f1N 29.Kh1 Neg3 0-1. BeepBeepImAJeep (2705) - B0N0B0 (2305), lichess.org, 2016.

5.c4 dc4 6.Bc4 Nb6 7.Be2 =.

5.c4 dc4 6.Bc4 Bg7 7.Bf7! Kf8 (7...Kf7 8.Ng5 Combination) 8.Ng5 Nb6 9.Qb3 Nbd5 10.Be6 Qd6 11.Bc8 Rc8 12.e4 Qb4 (12...Ne4 13.Ne4 Qb4+-) 13.ed5 Qb3 14.ab3 Nh5 (14...a6 15.Kd1+-) 15.Ne6 Kf7 16.Bg7 Ng7 17.Ng7 Kg7 18.Ra7 b6 (18...Rhd8 19.Nc3 Ra8 20.Ra8 Ra8 21.Ke2+-) 19.0-0 Rhf8 20.Re1 Rf7 21.Nc3 1–0. Fournier,Frederic (2110) – San Luis,Lorenzo (2095), Chess.com (World League Match FRA–PHI ), 2012.

5.c4 e6 6.c5 Bg7 7.Be2 0-0 8.0-0 c6 9.a4 (9.d4 a5 10.ba5 Ne4+=) 9...a6 (9...a5 10.Qb3=) 10.a5 Re8 11.d4 Qc7 12.Nbd2 Re7 13.Qc2 h6 14.Bd3 Nf8 15.Ne5 Kh7 16.f4 N6d7 17.Rf2 f5 18.h3 (18.Bc3 Rb8+/–) 18...Nf6 (18...Rb8 19.Rb1+/–) 19.g4 Ne4 20.Rg2 Bd7 21.gf5 (21.Be2 Bf6+/–) 21...ef5+= 22.Ndf3 (< 22.Ne4 fe4 23.Be2 Bh3=+) 22...Be8 23.h4 Nf6 24.Qf2 Ne4 25.Qe2 Bf6 26.Rh2 (26.h5!?+=) 26...Rg7 27.Qg2 Qe7 28.Qh3 Rc8 (28...Bd7 29.h5 g5 30.Nd7-/+) 29.Kh1 (29.Ng5 Kg8 30.Ne4 de4 31.Be4 Rd8+/–) 29...Ne6 30.Rg1 Bf7? (better is 30...Be5!? 31.de5 Bd7+=) 31.Nf7 Qf7 32.Ng5 (32.h5 Rcg8 33.hg6 Rg6 34.Qf5+-) 32...N4g5?? (better is 32...Bg5 33.hg5 h5+=) 33.hg5+- (33...Bg5 34.Rg5+- (34.fg5?! h5+-); 33.fg5?! Be7+/–) 1–0. Kucharkowski,Jens – Enderlein, Freital, 1982.

5.c4 e6 6.cd5 ed5 7.Qb3 (7.Nc3 Bb4 8.Nd5 Bd6+=) 7...c6 (7...Bd6 8.Nc3 c6 9.Be2=) 8.d4 (8.Be2 Qe7=) 8...Bg7 (8...Bd6 9.Nc3=) 9.Bd3 (9.Be2 0-0=) 9...0-0 (9...a5 10.Bc3=) 10.Nbd2 (10.0-0 a5=) 10...Re8 (10...a5 11.Ba3=) 11.0-0 (11.Rc1 a6=) 11...Nf8 (11...a5 12.a3=) 12.Rfc1 (12.b5 cb5 13.Bb5 Bd7+=) 12...Bd7 (12...Ne4 13.b5 Bf5 14.bc6 bc6 15.Ba3 (15.Rc6? Rb8 16.Qc2 Nd2 17.Nd2 Bd3 18.Qd3 Rb2-+) 15...Nd2 16.Nd2+=) 13.a4 White intends b5 (13.Ne5 Ng4 14.Ng4 Bg4+=) 13...Ne4 14.b5 Rb8 15.Ba3 (better 15.Qc2+=) 15...c5? (better 15...Bf5+=) 16.Bc5+- Nc5 17.Rc5 (17.dc5?! Ba1 18.Ra1 Bg4=) 17...Be6 18.Rac1 Qa5 (18...Nd7 19.R5c2+-) 19.Qa2 (19.Qc3 Qd8 20.a5 Nd7+-) 19...Rec8 20.Nb3 (20.Rc8 Rc8 21.Rc8 Bc8+-) 20...Qd8 21.Rc8 (21.Qc2 Bf6+-) 21...Rc8 22.Rc2 Nd7 23.Ne1 (23.Rc8 Qc8 24.Qc2 Qc2 25.Bc2 b6+-) 23...Nf6 (23...Bf8 24.a5+-) 24.Nc5+- Qe7 (24...Rc7 25.Nf3+-) 25.Ne6 (25.Nf3 Bg4+-) 25...Qe6 26.Rc8 Qc8 27.Qc2 Qd7 (27...Qc2 28.Bc2 h6 29.Nd3+-) 28.Qc5 b6 29.Qc6 Qe7 30.Nc2 (30.Nf3 Bf8+-) 30...h6 31.Qc3 Bf8 32.Ne1 (32.Qc8 Kg7+-) 32...Kg7 (32...Ne4 33.Qb3 Qb4 34.Qb4 Bb4 35.Nc2+-) 33.Bc2 (33.Nf3 Ne4 34.Be4 Qe4+-) 33...Qd8 (33...Ne4 34.Be4 Qe4 35.Qb3+-) 34.Nd3 (34.Qc6 Qe7+-) 34...Bd6 35.Nb4 (35.Ne5 Qe7+-) 35...Ng4 (35...Ne4 36.Be4 de4 37.Nc6+-) 36.h3 (36.g3 Bb4 37.Qb4 Qc8+-) 36...Nf6 (36...Bb4 37.Qb4 Qc7 38.hg4 Qc2 39.g3+-) 37.Nc6 Qc7 38.Qb3 (38.Bd1 Ne4 39.Qc2 f5+-) 38...g5 (38...a6 39.Bd1+-) 39.Qd3 (39.Bd3 a6+-) 39...Ne4 (39...a6 40.Qf5 ab5 41.ab5+-) 40.f3 (40.Qe2 Qd7+-) 40...Bh2 41.Kf1 Ng3 42.Ke1 f5 43.Ne5 (43.Bb3 Qd6+-) 43...Qe7 (43...Bg1 44.Kd1+-) 44.Qc3 Nh5 (44...Bg1+-) 45.Bf5 Bg3 (45...Ng3 46.Bb1 Nh5+-) 46.Kf1?? (46.Kd1 Be5 47.de5 Ng3 48.e6 Kg8+-) 46...Nf6?? (better 46...Be5 47.de5 Ng3 48.Kf2 Nf5=+) 47.Qc8 (better 47.Kg1+-) 47...Be5+- 48.de5 Qe5 49.Qb7 Kf8 50.Qa8 Ne8 51.Bd7 (51.Bc2 Qe3 52.Qd5 Qc1 53.Qd1 Qd1 54.Bd1 Nc7+-) 51...Qe3 (51...Qa1!? 52.Kf2 Qb2 53.Kg3 Qe5 54.Kg4 h5 55.Kh5 Qh8 56.Kg5 Qf6 57.Kg4 Qg6 58.Kh4 Qh7 59.Kg3 Qd7+=) 52.Qd5+- Nf6 (52...Qc1 53.Ke2 Qc2 54.Ke1 Qc3 55.Kd1+-) 53.Qd6 Kf7 (53...Kg7 54.Bf5+-) 54.Bf5 h5 (54...Qc1 55.Ke2 Qc4 56.Kd2 Qf4 57.Qf4 gf4 58.Kd3+-) 55.Qc7+- Qe7 56.Bg6! Kf8 (56...Kg6 57.Qe7 Deflection (57.Qc2 Decoy)) 57.Qc8 Kg7 58.Qf5 (58.Bc2 Qe3+-) 58...Kh6 (58...Qc5 59.Qc5 bc5 60.Be4+-) 59.h4! gh4 60.f4 Kg7 61.Qg5 Ng8 62.Qh5 (62.Qe7 Ne7 63.Be4 Ng8+-) 62...Nh6? (62...Qf6!? 63.Qh7 Kf8+=) 63.Bd3 (better 63.Bc2!? Qf6 64.Qf3+-) 63...Qf6+= 64.Qg5 (64.Qf3 Qa1 65.Ke2 Qa4+=) 64...Qg5 65.fg5 Nf7 66.g6 Ne5 67.Bc2 Ng6 68.Kf2 Ne5 69.Ke3 Kf6 70.Kf4 Nc4 71.Bb3 Ne5 72.Bd5 Ng6 (72...Nd3 73.Kg4+=) 73.Kg4 Ke5 74.Bc6 (74.Bf3 Nf4+-) 74...Nf4 75.Kf3 (better 75.Kh4!? Ne6 76.g4+-) 75...h3 (75...Kf5 76.Be4 Ke5 77.Bc2=) 76.g3 Nd3 (76...Ne6 77.Kg4+=) 77.g4+= h2 78.Kg2 (78.Kg3 Nc5+=) 78...h1Q (78...Kf4 79.Kh2 Kg4 80.Be4-/+) 79.Kh1= Nf2 (79...Kf4 80.Kg2=) 80.Kg2 Ng4 81.Kf3 ½–½. Silva,Janderson R Da (1790) – Bueno,Marcos A Ferr (1735), Curitiba BRA, Open, 2014.

5.c4 Bg7 6.Qb3 dc4 7.Bc4 e6 (7...0-0 8.Ne5 Qe8 9.0-0=) 8.Nc3 0-0 9.0-0 Nb6 10.Be2 a6 11.Rac1 Bd7 12.Rfe1 Bc6 13.Ne5 Bd5 (13...Qd2?? 14.Rcd1 (14.Nc6?! Qd7 15.Ne5 Qe7+-) 14...Bd5 15.Nd5 (15.Rd2?! Bb3 16.ab3 Rad8 17.Rd8 Rd8+-) 15...Qe1 16.Re1 Nbd5 17.Rd1+-) 14.Nd5 Nfd5 15.d4 Qg5 16.g3 (16.e4 Nf4 17.Bf1 Rac8+=) 16...c6 17.e4 Nf4 18.Bd1 Nh3 19.Kg2 Nf4 20.Kf1 Nh3 (20...Be5 21.de5 Nh5 22.f4+-) 21.f4 Nf4 22.gf4 Qf4 23.Kg1 Qh4 (23...Be5!? 24.de5 Rad8+-) 24.Nf3+- Qg4 25.Kh1 a5 (25...Rad8 26.a4+-) 26.b5 a4 27.Qb4 cb5 28.Qb5 a3 29.Bc3 Na4 (29...Nc8 30.Bb4 Na7 31.Qb6+- (31.Qb7?! Rfb8 32.Qd7 Rb4+-)) 30.Bb4 (30.Ba4 Qf3 31.Kg1 Bh6-+; 30.Qb7 Rfb8 31.Qd7 Nc3 32.Rc3 Rb2+-) 30...Rfd8 (30...Nb2 31.Bf8 Nd1 A) 32.Rcd1?! Qf3 33.Kg1 Qg4 34.Kh1 Rf8=; B) 32.Red1? Qf3 33.Kg1 Qe3 34.Kg2 Qe4 (34...Rf8?! 35.Qd3 Qg5 36.Qg3=) 35.Kg3 Qe3 36.Kg2 Rf8-+ (36...Kf8?! 37.Qb7 Qe2 38.Kh3-/+); C) 32.Qe2 Rf8 33.Rcd1+-) 31.Nd2 (31.Ne5 Qh3 32.Rc7 Rd4 33.Rf7 Be5 34.Qe5 Kf7 35.Qd4 Kg8+-) 31...Qh4 (31...Qh3 32.Ba4 Bd4 33.Rf1+-) 32.Ba4 Bd4 33.Re2 (33.Ba3 Be3 34.Re3 Rd2+-) 33...Bb2 34.Rf1 Qg4 (34...Qh3 35.Ref2 Qe3 36.Bc2+-) 35.Be7 Rd2 (35...Rd4 36.Bd1 Qh3 37.Qb7+-) 36.Qb7 (36.Rd2?! Qe4 37.Rg2 Qa4 38.Qb7 Qe8+-) 36...Qe2 (36...Rdd8 37.Bd8 Rd8 38.Qf7 Kh8 39.Rb2 Qe4 40.Rg2 Qe5+-) 37.Qa8 Kg7 (37...Rd8 38.Qd8 Kg7 39.Qf8) 38.Qf8 1–0. Lejel – RueDeVue, internet, 2019.

5.d4 Bg7 6.Bd3 0-0 7.Nbd2 Re8 8.0-0 c6 9.c4 e6 10.a4 b6 11.a5 Bb7 (11...c5 12.dc5 bc5 13.cd5 ed5 14.bc5 Nc5 15.Bb5=) 12.a6+/- Bc8 13.b5 cb5 (13...c5 14.Rc1+/-) 14.cd5 (14.cb5!? Ng4 15.Qb3+/-) 14...Nd5+= 15.Bb5 Nc7 16.Bc6 Rb8 17.Qb3 (17.Ne4 Ba6 18.Re1 b5+=) 17...Ba6 (17...e5 18.de5 Nc5 19.Qc2+=) 18.Rfc1+/- Bb7 19.Ra7 Bc6 20.Rc6 Nd5 21.Rd6 Re7 22.Qb5 N7f6 1-0. wgr069 (2275) - Beckerbursche (2130), Hourly Blitz Arena, lichess.org, 2021.

5.Be2 Bg7 6.0-0 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0-0 6.0-0 Nbd7).

6.a3 Bg7 7.Qc2 0-0=+ 8.Be2 (8.cd5 cd5 9.Bd3 Re8=+) 8...Nb6 (8...dc4 9.Qc4 Nb6 10.Qh4=+) 9.c5= Bf5 (9...Nc4 10.Bc3 e5 11.d3+=) 10.d3 Nbd7 11.0-0 Re8 (11...Qc7 12.Nbd2=) 12.Nd4+= Nf8 (12...Bg4 13.f3 e5 14.Nc6 bc6 15.fg4+-) 13.Nf5+- gf5 14.d4 e6 15.Nc3 White plans b5 15...Ng6 16.b5 Qc7 17.g3 Rad8 18.a4 Qd7 (18...Qa5!?+-) 19.a5+- Ng4 (19...a6 20.ba6 ba6 21.Ba6+-) 20.a6 Re7 (20...Rb8 21.ab7 Qb7 22.Rfb1+-) 21.ab7 Qb7 22.bc6 Qc6 (22...Qc8 23.Ra3+-) 23.Ra6 Qc8 24.Rfa1 e5 25.Nb5 ed4 26.ed4 Nf6 (26...Rde8 27.Bf1 f4 28.Nd6+-) 27.Na7 (27.Na7 Qc7 28.Nb5+-) 1–0. marekt – mizuzul, ChessWorld.net, 2020.

6.Nc3 Nb6 7.c5 Nbd7 8.Be2 Bg7 9.a4 (9.d4 0-0+=) 9...0-0 10.a5 Re8 11.0-0 e5 12.Qb3 Qc7 13.e4 (13.d3 Ng4 14.h3 Ngf6=) 13...de4 (better is 13...d4!? 14.Na4 Ne4=) 14.Ng5+= Re7 15.Bc4 Nf8 16.Nce4 Ne4 17.Ne4 Be6 18.Nd6 Bc4 19.Qc4 Ne6 20.Rfe1 Nd4 (better is 20...Nf4+=) 21.f4!+- Nf5 (21...ef4 22.Re4 Double attack (22.Bd4 Deflection; 22.Re4 Decoy)) 22.fe5 Nd6?? (better is 22...Rd8+-) 23.cd6 Qd7 24.de7 Qe7 25.Bc3 (25.a6 Rb8+-) 25...Rd8 (25...Qe6 26.Qh4+-) 26.e6 (26.a6 Rd5+-) 26...Rd5 (26...a6 27.ef7 Qf7 28.Qf7 Kf7 29.Bg7 Kg7 30.Re7 Kh6 31.Rb7 Rd2 32.Rc1+-) 27.Bg7 (27.a6 fe6 28.ab7 Qb7 29.Re6 Bc3 30.dc3 Qf7+-) 27...Kg7 28.ef7 Qf7 29.Ra3 (29.a6 Rd7 30.Re6 Qf5+-) 29...Qf6 (29...Rd7 30.Qf7 Kf7 31.a6+-) 30.Qc3 (30.Rf3 Rf5 31.Rf5 gf5+-) 30...Rd4 (30...Rd7 31.a6 Qc3 32.Rc3+-) 31.Qe3 (31.Re8 Kf7 32.Rb8 Qe7+-) 31...Rd7 (31...a6 32.Qe8 Rh4 33.Qe7 Qe7 34.Re7 Kf6 35.Rb7+-) 32.Qe5 (better is 32.Qa7!? Qb2 33.Qe3 Rf7+-) 32...Qe5 33.Re5 Kf6 34.Re2 Rd4 (34...h6 35.a6+-) 35.Rf3 Kg5 36.Re5 Kg4 (36...Kh4 37.Rf7 h6 38.Rb7 Rd2 39.Ra7 Rd1 40.Kf2 Rd2 41.Kf3 Rd3 42.Re3+-) 37.h3 Kh4 38.Kh2 g5 39.Rf6 Kh5 40.g4 (40.g4 Rg4 41.Ree6 Rg2 42.Kg2 g4 43.Rf5 Kh4 44.Rh6#; 40.Ree6 g4 41.Rf5 Kh4 42.g3) 1–0. Lopez Garrido,Daniel (1915) – Novoa Blanco,Jose Manuel, Burgas op, 2009.

6.cd5 cd5 7.Nc3 Nb6 8.Bb5 Bd7 9.Bd7 Qd7 10.Ne5 Qf5 (10...Qd8 11.Na4+=) 11.Nb5 Rc8 12.Na7 Rd8 13.Nb5 Bg7 14.Nc7 Kf8 15.d4 h5 16.0-0 Ng4 17.Rc1 Ne5 18.de5 Be5 19.Bd4 Nc4 20.a4 (20.Re1 Nb2 21.Bb2 Bb2+/–) 20...Bc7 (20...h4!?+=) 21.Bh8+/– f6 22.Qd4 Kf7? (better is 22...Qe5! 23.Qe5 Be5+= (worse is 23...fe5 24.Rfd1+-)) 23.Rc4+- dc4 24.Qc4 Qd5 25.Qc7 Rh8 26.h3 Rd8 27.Rc1 Rd7 28.Qc4 Qc4+/– 29.Rc4 Ke6 30.Kh2 b6 31.Rc6 Rd6 32.Rd6 Kd6 33.Kg3 g5? 34.h4+- Kd5? 35.hg5 fg5 36.f4 gf4 37.ef4 Kc4 38.a5 Kb5 39.ab6 Kb6 40.Kh4 Kb5 41.Kh5 Kb4 42.g4 Kc5 43.g5 Kd5 44.g6 Ke6 45.Kg5 (45.Kg5 Kd5 46.g7+-) 1–0. Fournier,Frederic (2555) – Wychi(C) (2290), Active (3/5), 2004.

6.cd5 cd5 7.Nc3 Nb6 8.Be2 Bg7 9.0-0 0-0 10.d3 Bd7 (10...Qd6 11.Qb3=) 11.Ne5 Rc8 12.Nd7 Nbd7 (12...Qd7 13.a4=) 13.Qb3 e6 14.h3 (14.Rac1 Qe7+=) 14...a6 15.a4 Qe7 16.Rfc1 Rc7 17.Nd1 (17.d4 Rfc8+=) 17...Rfc8 18.Rc7 Rc7 19.f4 Nb8 20.Nf2 Nc6 21.e4 (21.b5!? Na5 22.Qd1=) 21...Qb4=+ 22.Qc2? (22.Qb4!? Nb4 23.Rb1=+) 22...Qb6 (better 22...Nd4 23.Qc7 Ne2 24.Kh2 Qb2-+) 23.Rb1-/+ Nb4 24.Qb3 de4 (24...Rc2 25.Bf6 Re2 26.Bh4-+) 25.Bf6 (better 25.Be5 Rc8 26.Qb2=+) 25...a5?? (better 25...Bf6 26.a5 Qe3 27.Qb4 Bd4-+) 26.Bd8 (better 26.Bg7 ed3 27.Be5+-) 26...Qc5?? (better 26...Bd4 27.Kh2 Bf2 28.de4 e5+-) 27.Bc7+- Qc7 28.de4 (worse 28.Ne4 Qf4 29.Re1 Be5+-) 28...Qf4 29.Qd1 h6 (29...Bf6 30.Ng4 Bg5 31.Bf3+-) 30.Qd8 Kh7 31.Qa5 Bd4 (31...Nc6 32.Qe1 Qc7+-) 32.Bf3 (better 32.Qb4 Qf2 33.Kh1+-) 32...Nd3+= 33.Rf1?? (33.Rd1 Qg3 34.Qd2 Bf2 35.Kh1 Ne5+=) 33...Qe3 (33...Nf2 34.Qe1 Ng4 35.Rf2 Nf2-+) 34.Qb5 (34.Qc7 Kg8 35.a5+= (35.Qb7? Nf2 36.Qb8 Kg7-+)) 34...Nf2-/+ 35.Kh2?? (better 35.Qe2 Qe2 36.Be2 Ne4 37.Kh2 Be5 38.Kg1=+) 35...Qf4-+ 36.g3 (36.g3 Qf3 37.a5-+). Hilbert,Stephan J (1650) – Mazo,Joel (1615), FICGS, 2013.

6.cd5 cd5 7.Nc3 Nb6 8.Ne5 Bg7 +=.

6.cd5 cd5 7.Nc3 e6 8.a3 Bg7 9.Be2 0-0 10.0-0 Re8 11.Rc1 (11.d4 a5+=) 11...e5 12.Nb5 e4 13.Nfd4 Ne5? (better 13...Re7+=) 14.Nc7+- Bd7 15.Ne8 (15.Na8 Qa8 16.f4 Nc6+-) 15...Qe8 16.d3 (16.f4 Nc6+-) 16...ed3 17.Bd3 Nd3 18.Qd3 Ne4 (18...Ng4 19.Ba1+-) 19.Rc7 (better 19.Rc2+-) 19...Bd4?? (better 19...Be5 20.Rc2 Ba4+-) 20.Qd4 (20.Bd4?! Bb5 21.Qc2 Bf1 22.Kf1 b6+-; 20.ed4?! Bb5 21.Qc2 Bf1 22.Kf1 Qe6=) 20...f6 (20...Kf8 21.f3 Ng5 22.Qg7 Ke7 23.Qf6 Kf8 24.Qg5+-) 21.f3 (21.f3 Ng3 22.hg3+-) 1–0. GuestHHGH – FuManChuJT, freechess.org, 2016.

6.cd5 cd5 7.Nc3 Bg7 8.Be2 0-0 9.0-0 (9.Rc1 Nb6=) 9...Re8 (9...Nb6 10.Rc1=) 10.Qb3 (10.Rc1 a5 11.Nb5 ab4+-) 10...Nb6= 11.a4 Be6 (11...Bg4 12.d4=) 12.Ng5+= Bf5 13.a5 Nc8 14.d3 h6 15.Nf3 Be6 (15...Qd6 16.Rac1 a6 17.Na4+-) 16.Nd4+- Bg4 17.Bg4 Ng4 18.Nd5 (18.Qd5 Bd4 19.Qd4 Qd4 20.ed4 Nf6+=) 18...Qd6 (18...e6 19.h3+=) 19.Nf4 (better 19.g3 e6 20.Nc3+-) 19...g5?? (19...e5 20.Nb5 Qd7+-) 20.Nf5+- e5 (20...Qd7 21.Ng7 Rd8+-) 21.Nd6 Nd6 22.Nd5 Rac8 23.h3 Nf6 24.f4 gf4 (24...Nd7 25.fe5 Be5 26.Be5 Re5 27.Nf6 Nf6 28.Rf6 Re3 29.Rd6+-) 25.ef4 (25.Nf6 Bf6 26.ef4 Re6+-) 25...Nh5 (25...Nd7 26.fe5 Ne5 27.Nf6 Bf6 28.Rf6+-) 26.fe5 Be5 27.Be5 (better 27.g4!? Ng3 28.Rfe1 Bd4 29.Bd4 Ne2 30.Re2 Re2+-) 27...Re5 28.Nf6 Nf6 29.Rf6 Re6 30.Re6 1–0. DEFFM – ninochess, freechess.org, 2018.

6.cd5 cd5 7.Be2 Bg7 8.0-0 0-0 9.Qb3 e6 10.Nc3+= Ng4 (10...Ne4 11.Rfc1+-) 11.d4+- Ndf6 12.Rac1 (12.Bd3 Nh6+-) 12...Bd7 (12...Ne4 13.Ne4 de4 14.Nd2+-) 13.b5 (better 13.h3 Nh6 14.Bd3+-) 13...Qe7? (better 13...Ne4+-) 14.Ba3+- Qd8 15.h3 Nh6 16.Bf8 Bf8 17.g4 Ne8 18.e4 de4 19.Ne4 Nd6 20.Nd6 Bd6 21.Ne5 Be8 22.Qe3 Qh4 (22...Kg7 23.a4+-) 23.Rc2 Be5? (23...f5 24.Rfc1 Rd8+-) 24.de5 (24.Qe5?! Qh3 25.f3 f6 26.Qe6 Kg7+-) 24...Rd8 (24...a6 25.Rfc1 Kg7 26.Rc8 Rc8 27.Rc8+-) 25.Rfc1 a6 (25...Kg7 26.Rc7 a6 27.b6+-) 26.Rc8 Kg7 27.ba6 ba6 28.Ba6 Qe7 (28...Rc8 29.Rc8 Ng4 30.Qf4+-) 29.R8c7 (better 29.Qf3 Nf5 30.Rd8 Qd8+-) 29...Rd7 30.Rc8 Ra7?? (30...Rd8 31.Qf3 Rd2+-) 31.Re8!+- Qe8 32.Qa7 Qa4 33.Rc7 Qa2 (33...Qd1 34.Bf1 Qf3+-) 34.g5 Qa1 35.Kg2 (35.Kg2 Qe5 36.gh6 Kh6 37.Rf7 Qe4 38.Kh2 Kh5 39.Rh7 Kg5 40.Qe7 Kf5 41.Rf7 Ke5 42.Qc7 Kd4 43.Qc4 Ke5 44.f4 Qf4 45.Qf4 Kd5 46.Rd7 Kc5 47.Qd6) 1–0. DEFFM – jangazy, freechess.org, 2018.

6.Be2 dc4 7.Bc4 Nb6 8.Be2 =.

6.Be2 Bg7 7.cd5 cd5 8.0-0 0-0 9.Qb3 a6 (9...Nb6 10.Rc1=) 10.Rc1+= b5 (10...Nb6 11.Be5 Bg4 12.d4+=) 11.a4 (11.Nc3+/–) 11...Qb6 (better is 11...ba4!? 12.Qa4 h6+=) 12.ab5+- a5? (better is 12...Nb8+-) 13.Qa4 Bb7 (13...Qd8 14.ba5 Re8 15.Qb4+-) 14.ba5 Qd6 (14...Qd8 15.Qb4+-) 15.Ba3 Qe6 16.Nd4 Qe4 (16...Qe5 17.a6+-) 17.Nc3 Qh4 18.Be7 Ne5 (18...Rfe8 19.a6+-) 19.Nf3 Nf3 (19...Qa4 20.Ra4 Rfe8 21.Bf6 Bf6 22.a6 Nf3 23.Bf3 Bc3 24.dc3+-) 20.Bf3 Qa4 21.Ra4 Rfe8 (21...Rfb8 22.a6 Ne8 23.Nd5+-) 22.Bf6 Bf6 23.Nd5 Bd5 24.Bd5 Red8 (24...Rab8 25.a6 Rb5+-) 25.Ba8 Ra8 26.b6 (26...Be5 27.a6+-) 1–0. b4_player – opponent, gamecolony.com, 2007.

5.c4 dc4 6.Bc4 e5 (6...Nb6!? 7.Bb5 c6=) 7.Be5+- Ne5? (better 7...Bb4!? 8.Bf7 Kf7 9.Qb3 Kg6 10.Qb4 Re8+-) 8.Ne5+- Bb4?? (better 8...Nd5 9.Bb5 c6 10.Nc6 Qc7 11.Nd4 Bd7+-) 9.Nf7 (9.Nf7 Qe7 10.Nh8+-) 1–0. Pierre – Vasches, internet, 2020.

5.c4 e6 6.c5 c6 7.Be2 Be7 8.d3 0-0 9.Nbd2 a6 10.0-0 b6 11.d4 bc5 12.dc5 Qc7 13.Qc2 Qb8 (13...a5 14.a3=) 14.a3 Re8 15.Qc3 Nf8 (15...a5!?+=) 16.Ne5+- N8d7 (better 16...Qc7!?+-) 17.Nc6+- Qb7? (better 17...Qc7 18.Ne5 Rd8+-) 18.Ne7 Re7 19.Nf3 (better 19.c6 Qa7 20.cd7 Bd7 21.Qc5 Qc5 22.bc5+-) 19...Qc6 20.h3 (better 20.Ne5 Ne5 21.Qe5+-) 20...Bb7? (better 20...e5+-) 21.Nd4 Qc7 22.Rfc1 (better 22.c6+-) 22...Ne4 23.Qc2 e5 24.Nf3 (24.Nf5 Re6+-) 24...Bc6 25.Nd2 Nd2 26.Qd2 Nf6 27.Bf3 Rd8 28.Qe2 Bb5 29.Qe1 e4 (29...Bd3!?+-) 30.Bf6+- gf6 31.Bg4 Qe5 32.a4 Bd3 33.Be2 Be2 (33...d4 34.Bd3 ed3 35.e4+-) 34.Qe2 d4 35.ed4 Rd4 36.Qa6 Rb4 37.Qc8 (37.a5 Rd4+-) 37...Re8 (37...Kh7 38.c6 Rc7 39.Qf8+-) 38.Qg4 Kh7 39.c6 Re7 (39...Rg8 40.Qd1+-) 40.a5 (40.Qg3 Qe6+-) 40...Rc7 41.a6 (41.a6 Rc6 42.Re1+-) 1–0. GuestZVZG – JustMicgo, freechess.org, 2017.

5.a3 c5 6.b5 b6 (6...Bd6 7.Nf3=) 7.Nf3= c4 8.d3 Bc5 9.Bd4 Qc7 (9...cd3 10.Bd3 a6 11.Nc3=) 10.Be2 (10.dc4 0-0+=) 10...Bd4 11.Nd4 Bb7 12.0-0 e5 (12...0-0 13.Qe1=) 13.fe5 Qe5 14.Qd2 0-0 15.Rf5 Qd6 16.Nc3 Bc8 (16...Ne5 17.Rg5 Ne8 18.Nf3+=) 17.Bf3 (better 17.Nd5!? Nd5 18.Rd5 Qd5 19.Bf3+-) 17...Ne5= 18.Rf6 Qf6 19.Bd5 Rb8 20.Nc6 (20.Bc4 Nc4 21.dc4 Bb7=) 20...Nc6=+ 21.bc6 (21.Bc6 Rd8=+) 21...Be6-/+ 22.Rf1 Qe5 23.Bf3 Qa5 24.d4 h5 (24...Qa3!? 25.d5 Rbd8=+) 25.Rd1 Rbc8 26.d5 Bg4 27.Nb1 Rfd8? (better 27...Qa4=) 28.Qa5+- ba5 29.Nc3 Bf3 30.gf3 f5 31.Rd4 Kf7 32.Rc4 Kf6 33.Rd4 (33.Ra4 Rc7+-) 33...a6 (33...g5 34.Kf2+-) 34.Ra4 Rd6 35.Ra5 Rcc6 (35...Ra8+-) 36.dc6 Rc6 37.Nd5 Kg5 38.Nb4 Re6 39.Kf2 g6 40.Ra6 (40.Ra6 Ra6 41.Na6+-) 1–0. Hyatt,Cliff – Headbird,R, Social Bi–Monthly, 1998.

5.a3 c5 6.c3 Ne4 (6...Bd6!?-/+) 7.Nf3+= Be7 (7...a5 8.Bb5+=) 8.d3 (8.c4 0-0+=) 8...Nd6 (8...Nef6 9.h3+=) 9.Be2 Bf6 (9...Qb6 10.Kf2+=) 10.0-0 (10.e4 Be7=) 10...cb4 (10...0-0!?+=) 11.ab4= 0-0 12.Qe1 (12.Na3 e5=) 12...Qb6 13.d4 Qc7 14.Bd3 Nc4 15.Bc1 Ndb6 16.Nfd2 (16.Na3 Bd7=) 16...Bd7 17.Na3 (17.Nc4 Nc4 18.Nd2 Nb6=) 17...Nd2 (17...a5!? 18.ba5 Na5-/+) 18.Bd2= a5 (18...g6 19.Qg3=) 19.Qb1 (19.ba5 Ra5 20.c4 Ra3 (20...dc4?? 21.Bh7 Kh7 22.Ba5+-) 21.Ra3 dc4+=) 19...g6 20.ba5 Nc4 (20...Ra5 21.c4 Ra3 22.Ra3 Nc4 23.Ra2+=) 21.Nc4+/– dc4 22.Be2 Bc6 (22...Ra6 23.Qb4 Rfa8 24.Bc4 Ra5 25.Ra5 Ra5 26.Bd3+/–) 23.Bc4 (23.Qb6!? Rfc8 24.Bc4 Bg2 25.Qc7 (worse is 25.Kg2 Qc4 26.Qb7 Rab8+=) 25...Rc7 26.Kg2 Rc4 27.Rfb1+/–) 23...Bg2+= 24.Kg2 Qc4 25.Qb7 Bh4 (25...Rfb8 26.Qf3 Bd8 27.Kg3+=) 26.Qf3+/– Ra6 27.Kh3 Bf6 28.Rfb1 Qd3 29.Rb2 Rfa8 30.Rba2 Bd8 31.Kg2 (31.Qf1 Qf5 32.Kg3 Ra5 (32...Ba5? 33.Qf3+-) 33.Ra5 Ra5 34.Ra5 Ba5+=) 31...Kg7 (better is 31...Ra5!? 32.Qa8 Ra8 33.Ra8 Qd2 34.Kf3 Kg7 35.Rd8 Qh2=) 32.e4+/– Qf3 (better is 32...Qb5!?+/–) 33.Kf3+- Ra5 34.Ra5 Ra5 35.Ra5 Ba5 36.Ke3 Kf8 37.c4 Bc7 38.h3 Ke8 39.Kd3 Kd7 40.c5 f5 41.d5 fe4 42.Ke4 ed5 43.Kd5 Bb8 44.c6 Kc8 45.Be3 Kd8 46.Kc4 Ke7? 47.Kb5 Kd6?? 48.Bd4 Kd5 49.Be5! (49.Be5 Be5 50.fe5+-) 1–0. Cebolla Moll,Ricardo (2045) – Benedito Salavert,Jaime (1925), Championship Provincial Individual ABSO, 2012.

5.a3 c5 6.Nf3 cb4 7.Be2 Bd6 =.

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Nbd7 5.f4).

5.b5 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Nbd7).

5.b5 c5 6.Nf3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Be7 6.Nf3 Nbd7).

4.b5 Nf2?? (better 4...Bf5=) 5.Kf2+- e6 6.g3 (6.Nf3 Nd7+-) 6...Be7 (better 6...a6+-) 7.Bg7 Bf6 (7...Rg8 8.Bc3 Nd7+-) 8.Bh8 Bh8 9.d4 Qf6 (9...e5 10.Kg2+-) 10.Qf3 Qf3 (10...c5 11.Qf6 Bf6 12.Nf3+-) 11.Nf3 c5 12.c4 cd4 (12...Nd7 13.Nc3 Nf6 14.Rc1+-) 13.ed4 dc4 14.Bc4 a6 15.Rc1 ab5 (15...Bd7 16.Nc3+-) 16.Bb5 Kd8 17.Nc3 Ra5 (17...Bd7 18.Rab1 Nc6 19.Ke3+-) 18.a4 Ra7 (18...f5 19.Ne2 Bd7 20.Ng5+-) 19.Ne4 b6 (19...Bd7 20.Nd6 Bg7 21.Nf7 Ke7 22.Rc7+-) 20.Nd6 Bb7 (20...Ba6 21.Ba6 Na6+-) 21.Nf7 Ke7 22.Nh8 (better 22.Rc7 Kf8 23.Nh8 Kg8+-) 22...Bf3 23.Kf3 Na6 24.Ba6 Ra6 25.Rc7 Kd6 26.Rd1 (26.Rac1 e5 27.R1c6 Kd5 28.Nf7 b5 29.Ra6 e4 30.Ke3 ba4 31.Rc5) 26...Kc7+- 27.Nf7 Kd7 (27...Ra4 28.Ng5+-) 28.Ra1 Ke7 29.Ne5 b5 30.a5 b4 (30...Kd6 31.Ke4+-) 31.Rb1 Ra5 (31...Kd6 32.Rb4 Kd5+-) 32.Nc6 Kd6 33.Na5 Kd5 34.Rb4 h5 35.Kf4 e5 36.de5 h4 37.g4 h3 38.Rb7 Kc5 39.e6 Kd6 40.e7 Ke6 (40...Kc5 41.e8Q Kd4 42.Qe3 Kd5 43.Qe5) 41.e8Q (41.e8Q Kd5 42.Qe5) 1–0. GuestGRDT – GuestAss, freechess.org, 2020.

4.c4 dc4 5.Bc4 e6 6.a3 (6.Qf3!? Nd6 7.Be2=) 6...Nf2+= 7.Bb5 (7.Kf2 Qh4 Double attack) 7...c6 8.Kf2 cb5 9.Nc3 Bd7 10.Nf3 Be7 11.Rf1 0-0 12.Kg1 a6 13.d4 Bc6 14.e4 b6 15.Qd3 Bb7 16.Rad1 f6 17.d5 ed5 18.ed5 Bd6 19.Ne4 a5 (19...Bc8 20.Rfe1=) 20.Bc3+= (worse is 20.Qb5 Ba6 21.Qa4 Bf1 22.Rf1 Bf4-/+; 20.Nd6?! Qd6 21.Nh4 Qd7=) 20...Na6 21.ba5 (better is 21.Qb5!? Bf4 22.Rfe1=) 21...Nc5-/+ 22.Nc5 Bc5 23.Kh1 ba5 24.Rfe1 (24.Qb5!? Qc7 25.Qb3-/+) 24...Ba3 25.Qb5 Ba6 (25...Rf7 26.Nd4 a4 27.Ra1-/+) 26.Qa5 (26.Qa4 Qd6=) 26...Qa5 (better is 26...Bc4!? 27.Qd8 Rfd8-/+) 27.Ba5= Be2 (27...Rf7 28.d6 Rd7-/+) 28.Re2+= ½–½. Schwichtenberg,Juergen (1870) – Dietze,Otto (1800), Halle GER, 2011.

4.d3 Nf2 5.Kf2 e6 6.a3 Qh4 7.g3 Qe7 8.Nf3 Nc6 (8...Nd7 9.c4+-) 9.b5 Nb4? (9...Nb8+-) 10.ab4 (10.c4 Qd8+-) 10...Qb4 11.Ba3 Qb5 12.Nc3 (better 12.d4 Qa5+-) 12...Qd7 (12...Qc6 13.Bf8 Rf8+-) 13.Ne5 Qc6 (13...Qd8 14.Qf3 Qf6+-) 14.Nc6 bc6 15.Bf8 Rf8 16.Qh5 g6 17.Qh7 Bd7 18.Ra6 0-0-0 19.Qh4 (better 19.Ra7 Rh8 20.Qg7 Kb8+-) 19...f5 20.Ra7 f4 21.Ra8 Kb7 22.Rd8 fe3 23.Ke2 Rd8 24.Qd8 d4 (24...c5 25.Bg2 Bc6 26.Rb1 Bb5 27.Rb5 Ka7 28.Qc7 Ka6 29.Qb6) 25.Bh3 dc3 (25...c5 26.Rb1 Bb5 27.Rb5 Ka7 28.Qc7 Ka6 29.Qb6) 26.Rb1 (26.Rb1 Ka7 27.Qc7 Ka6 28.Qb6) 1–0. DEFFM – hekktor, freechess.org, 2019.

4.f3 Ng5 (4...Nf6 5.a3=) 5.b5 (5.c4 dc4 6.Bc4 Qd6=) 5...e5 (5...Nd7 6.Nc3=) 6.Be5+= a6 (6...Nd7 7.Bb2+=) 7.Nc3 (better 7.f4 Ne4 8.Nf3+=) 7...d4 (better 7...ab5!? 8.Nb5 Ne6+=) 8.Bd4+- ab5 9.Bb5 c6 10.Bd3 (10.Bc4 b5 11.f4 Ne6 12.Be6 Be6+-) 10...c5 (10...Nd7 11.f4 Ne6 12.Nf3+-) 11.Be5 Nc6 12.Bb5 (12.Bg3 Bd6+-) 12...Bd7 13.Bc6 (13.Bg3 Be7+-) 13...Bc6+- 14.Nge2 (14.Rb1 Ra5+-) 14...Bf3 15.0-0 Bg2? (better 15...Bg4+-) 16.Kg2+- Qd7 (16...Bd6 17.Bf4+- (17.Bg7?! Rg8+-)) 17.Nf4 Qc6 18.Nfd5 (18.Kg1 f6 19.Nfd5 Be7+-) 18...h5 (18...Rd8 19.e4 Rd7 20.Qg4+-) 19.e4 h4 (19...Ra5+-) 20.Nc7 Kd7 (20...Ke7 21.N3d5 Kd8 22.Na8 Ne4 23.Bc7 Ke8 24.c4+-) 21.Qg4 Ne6 (21...Kd8 22.Na8 f6 23.Rab1+-) 22.Rf7 Kd8 23.Ne6 Kc8 24.Nd4 (24.Nd4 Kd8 25.Nc6 bc6 26.Qd7) 1–0. DEFFM – GuestCBRD, freechess.org, 2018.

4.Nf3 Nc6 5.b5 Nb4?? (better 5...Nb8+=) 6.a3+- e6 (6...Nc2 7.Qc2 Bf5 8.Bd3+-) 7.ab4 Bb4 (7...Nf6 8.Ra4+-) 8.Bg7 Rg8 9.Be5 Bd7 10.Nd4 f6 (10...Bd6 11.Bd6 cd6 12.Nf3+-) 11.Qh5 Rg6 (11...Kf8 12.Qh6 Rg7+-) 12.Qh7 fe5 (12...Rg5 13.Bf4 e5 14.h4+-) 13.Qg6 Ke7 14.Qg7 Kd6 15.Nf3 Nf6 (15...Qf6 16.Qf6 Nf6 17.Ra4+-) 16.Ne5! Ke5 Decoy to e5 17.Qg3 Kf5 18.Bd3 Ne4 19.f3 Qf6 (19...Qg5 20.fe4 Kg6 21.ed5 Kh6 22.Qc7 Qh4 23.g3 Qe7 24.Qf4 Kg7 25.Qg4 Kh8+-) 20.0-0 (20.fe4 de4 21.Rf1) 20...Qa1 (20...Qg5 21.fe4 Kg6 22.e5 Kh5 23.Qf3 Kh6 24.Qh3 Qh5 25.Rf6 Kg5 26.Qg3 Qg4 27.Rg6 Kh5 28.Qg4) 21.fe4 1–0. GuestYDSJ – GuestXQKN, freechess.org, 2020.

4.Nf3 e6 5.a3 Bd6 (5...a5 6.b5=) 6.Be2 (6.Bg7!? Rg8 7.Bb2+/–) 6...0-0 7.d3 Nf2? (better is 7...Ng5=) 8.Kf2+- Qf6?? (8...c5+-) 9.Bf6 gf6 10.Rf1 Nc6 11.Nbd2 Nd8 (11...a5 12.c3+-) 12.c4 b5 (12...c6 13.Kg1+-) 13.cb5 c5 14.bc5 Bc5 15.d4 Bd6 16.Qc2 Bb7 17.Bd3 f5 18.Rfc1 e5 (18...Kg7 19.Nb3+-) 19.de5 f4 20.ed6 Ne6 21.Bh7 Kh8 22.ef4 Nf4 23.Qf5 Rg8 24.Bg8 Kg8 (24...Rg8 25.Qf4 Kg7 26.Rc7 Rf8 27.Qg4 Kh6 28.Ne5 Bc8 29.Qf4 Kg7 30.Rf7 Kg8 31.Qg5 Kh8 32.Qg7) 25.Qf4 (25.Qf4 Bc8 26.Ng5 Bd7 27.Qf7 Kh8 28.Qh7#; 25.Ng5 Nd3 26.Kg3 Kg7 27.Qf7 Kh6 28.Kh4 Nc1 29.Qf6) 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

4.b5 a6 5.Be5 ab5 6.Bb5 c6 7.Be2 Bb4 8.a3 Ba5 9.Nf3 Bf5 10.Nd4 Bg6 11.0-0 Nbd7 12.f4 (12.Bd6 Ne4 13.Bf4 Qf6+=) 12...Ne5 13.fe5 Ne4 14.d3 (14.e6!?+=) 14...Nc3= 15.Nc3 Bc3 16.Rb1 Qg5 17.Qc1 Qe5 18.Rb7 Bd4 19.ed4 Qd4 (19...Qe2 20.Re1 0-0-0 21.Ra7+-) 20.Kh1 0-0 21.Rb4 Qc3 Attacking the isolated pawn on a3 (21...Qa7 22.Rb3=+) 22.Rb3= Qc5 23.Qb2 h6 24.Bf3 Ra4 25.Rc3 Qd6 (25...Qd4 26.Qa1 Ra6 27.Rb3=+) 26.Qb7 d4 27.Rc6 (worse 27.Bc6 Rb8 (27...dc3?! 28.Ba4 Qa3 29.Bb3=) 28.Qd7 Qd7 29.Bd7 Ra7 30.Rc8 Rc8 31.Bc8 Rc7=+; 27.Qc6?! Qc6 28.Rc6 Rd8=) 27...Qa3 28.Bd5 Increases the pressure on f7 28...Ra7 (28...Kh7!?=) 29.Qb6+/- Rd7 30.Qd4 Rfd8?? (better 30...Kh7+/-) 31.Rg6+- (31.Rg6 Qf8 32.c4+-) 1-0. onur604 (2320) - Oberlappen (2225), Casual Rapid game, lichess.org, 2021.

4.b5 c5 5.Be5 Bd6 6.Bd6 Qd6 7.Be2 0-0 8.Nf3 d4 (8...Bf5 9.d4=) 9.0-0+= b6 (9...Nbd7!?+=) 10.Na3+- Be6 11.Bc4 Nbd7 12.Be6 fe6 13.Nc4 Qd5 14.d3 e5 15.Qe2 e4 16.Nfd2 Ne5? (better 16...ed3 17.Qd3 Rae8+-) 17.de4+- Ne4? (17...Qe6 18.Ne5 Qe5+-) 18.Ne5 Qe5 (18...Nc3 19.Qc4 Qc4 20.Ndc4 Nb5 21.a4+-) 19.ed4 Qd4 (19...cd4 20.Ne4 Rac8 21.Rad1+-) 20.Ne4 (20.Qe4?! Qd2 21.Rad1 Qb4 22.Qd5 Kh8+-) 20...Rae8 21.Rfe1 Rf4 (21...Qd5+-) 22.Nf6! gf6 (22...Qf6 23.Qe8 Discovered attack; 22...Rf6 23.Qe8 Discovered attack; 22...gf6 23.Qe8) 23.Qe8 Kg7 24.Re7 Kh6 25.Qf8 Kg5 (25...Kh5 26.Rh7 Kg5 27.Qg8 Kf5 28.Rh5 Ke4 29.Re1 Qe3 30.Qd5) 26.Qg7 (26.Qg7 Kh5 27.Qh7 Kg5 28.Rg7) 1–0. DEFFM – GuestJPHR, freechess.org, 2019.

4.b5 Bc5 5.Be5+= Nbd7 6.Bb2 (6.Bf4 Ne4+=) 6...0-0 (6...a6 7.ba6 ba6 8.Nc3+=) 7.Nf3 Ne4 (7...a6 8.ba6 b6 9.Be2+=) 8.d4 (8.Be2 a6+=) 8...Bb4 9.c3 Be7 10.Nbd2 Nb6 11.Bd3 Nd6 12.Qc2+/– h6 13.Ne5 Bf6 14.Ba3 Be6 15.0-0 Re8 16.Rab1 g6 17.e4 c6? 18.bc6+- de4? 19.Ne4 Bc4 20.Nd6 Re6 21.Nef7 Qf8 22.Bc4 Re7 23.cb7 Rb8 24.Rb6! ab6 25.Ne5 (25.Ne5 Rf7 26.Bf7 Kh7 27.Qg6 Kh8 28.Ne8 Be5 29.Bf8 Bh2 30.Kh2 Re8 31.Qh6) 1–0. Plock,Joerg (2120) – Heineccius,August (1605), R.–Tobies–Gedenkturnier–D, 2003.

4.b5 d4 (--> 1.b4 e5 2.b5 d5 3.Bb2 d4 4.e3 Nf6).

4.b5 Nbd7 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.b5 Ne4 5.Be5 Nf2?? (better is 5...Nd7 6.Bd4 a6+=) 6.Kf2+- Qh4 (6...Nd7 7.Bd4 Nc5+-) 7.Bg3?? (better is 7.g3 Qe7 8.Nf3+-) 7...Qf6= 8.Nf3 Qa1 9.Bd3? (9.Be5!? Qa2 10.Nc3=) 9...Bd6 (9...c6!?-/+) 10.Bd6=+ cd6 11.Nc3 Qb2 12.Nd5+= Kd8 13.c4 Qa2 14.Nb4 Qa3 15.Qb1 Qa5 16.Qb2+/– Nc6?? 17.Nc6 bc6 18.Qg7 Re8 19.bc6 Re7?? 20.Qf8 Re8 21.Qd6 (21...Bd7 22.Qd7) 1–0. brit3456 – Pelle3, Live Game Caissa's Web, 2005.

4.b5 Bg4 5.f3 Bh5 (5...Bf5 6.Be5 Nbd7 7.Bd4=) 6.Be5 Nbd7 7.Bb2 Ne4 (7...Nb6 8.Nh3+=) 8.g3 Qg5? (better is 8...Nec5=) 9.Nh3+- Qe7 (9...Qh6 10.Nf4 Nec5 11.Nd5+-) 10.Nf4 Nef6 11.Nh5 (11.Nc3 Qd6+-) 11...Nh5 12.Bg2 (12.c4 Nb6 13.cd5 0-0-0+-) 12...Qb4 13.Ba3 (13.Qc1!?+/–) 13...Qb5+= 14.Nc3 Qa5 15.Bf8 Rf8 16.Rb1 0-0-0 17.Rb5 Qa3 18.Rd5 Nhf6 19.Rd4 Nb6 20.Rd8 Rd8 21.Qb1?? (better is 21.Bf1=) 21...Rd2?? (better is 21...Nc4 22.Nb5 Qa5-+) 22.Kd2+/– Nc4 23.Kd3 Nb2 24.Ke2 Qc3 25.Re1 (better is 25.Qc1 b6 26.Qd2 Qc4 27.Kf2 Qa2 28.e4+/–) 25...Nc4? (better is 25...Nd5 26.Qc1 Nc4+/–) 26.Qb3+- Qd2 27.Kf1 Qd5 28.Qd3 Qc5?? (28...b5+-) 29.Bh3 1–0. De Bock,Lennart (1895) – Toscani,Marco, Quebec CAN, 2014.

4.c4 dc4 5.b5 Nc6?? (better 5...Qd5-/+) 6.bc6+- bc6 (6...Bd6 7.Bc4 bc6 8.Nf3+-) 7.Be5 Bc5 (7...Bd6 8.Nf3+-) 8.Bc4 0-0 9.Nf3 Bg4 10.0-0 Nd7 11.Bc3 Bd6 12.d4 (12.Be2 c5+-) 12...Qf6 (12...c5 13.dc5 Bc5 14.Bd3+-) 13.Nbd2 Qh6 14.h3 Be6 15.Be6 fe6 (15...Qe6 16.e4+-) 16.Ne5 (16.Qa4 Rad8+-) 16...Nf6 (16...Be5 17.de5 Rfd8 18.Rb1+-) 17.Ndc4 (17.Nc6 Nd5 18.Qc2 Qh5+-) 17...Ne4 (17...c5 18.Rb1+-) 18.Qd3 (18.Bb2 Qh4 19.Qc2 c5+-) 18...Nc3 19.Qc3 Be7 (19...c5 20.Rab1+-) 20.Nc6 Bf6 (20...Bd6 21.e4 Bf4 22.Rab1+-) 21.N4e5 g5 (21...Qg5 22.Qc4 Rfe8 23.Rab1+-) 22.Qc4 Kh8 23.Qe6 Rae8 (23...Qg7 24.Nd7 Rae8 25.Qg4+-) 24.Qd5 (better 24.Qe8 Re8 25.Nf7 Kg7 26.Nh6 Kh6 27.Rab1+-) 24...Rg8 (24...Qg7 25.Qa5+-) 25.Ng4 (better 25.Nf7 Kg7 26.Nh6 Kh6 27.Na7+-) 25...Qg6 26.Nce5 (better 26.Na7 Bg7 27.Rfc1+-) 26...Qf5 (26...Be5 27.Ne5 Qf6+-) 27.Nf7 Kg7 28.Qf5 (28.Qf5 Be7 29.f4 Ref8 30.fg5 Rh8 31.Qe5 Kg6 32.Rf6 Kg7 33.Re6 Kf7 34.Rf1 Ke8 35.Re7 Kd8 36.Qc7) 1-0. BeepBeepImAJeep (2675) - StrongeMastar (1705), lichess.org, 2016.

4.Be2 Bb4 5.Be5 Nbd7 (5...0-0 6.Nf3 Nc6 7.Bb2 Re8 8.0-0+=; 5...Nc6 6.Bb2 0-0 7.Nf3 Re8 8.0-0+=; 5...Qe7 6.Nf3 Bg4 7.c3 Nc6 8.Bc7=) 6.Bc3 Bd6 7.Nf3 0-0 8.0-0 +=.

4.Be2 Bd6 A) 5.b5 e4 (5...0-0 6.Nf3 e4 7.Nd4 c5 8.bc6+=; 5...c5 6.Nf3 Qc7 7.d3 0-0 8.Nbd2+=; 5...Bf5 6.Nf3 Nbd7 7.0-0 0-0 8.Nc3+=) 6.f3 a6 7.ba6 Na6 8.Nc3-/+; B) 5.a3 a5 (5...Nbd7 6.Nf3 a5 7.b5 c5 8.bc6+=; 5...0-0 6.Nc3 Nbd7 7.Nf3 a6 8.0-0+=; 5...e4 6.Nc3 a5 7.Nb5 Be7 8.Be5+=) 6.b5 e4 7.d3 0-0 8.de4+=.

4.Be2 e4 5.a3 (5.b5 Be7 (5...Be6 6.Nc3 Bd6 7.f3 Nfd7 8.g3+=; 5...Bd6 6.d3 Be6 7.Nd2 Nbd7 8.Bd4+=; 5...a6 6.Nc3 Be6 7.d3 ab5 8.Nb5+=) 6.Nc3 0-0 7.a4 Be6 8.d3+=; 5.Bc3 Bd6 (5...Be6 6.d3 Bd6 7.Nd2 Nc6 8.a3+=; 5...Bd7 6.d3 Bd6 7.Nd2 Nc6 8.a3+=; 5...Be7 6.a3 0-0 7.d3 Be6 8.Nd2+=) 6.d3 0-0 7.de4 Ne4 8.Qd5+=) 5...Be7 (5...a5 6.b5 Bd6 7.d3 0-0 8.de4+=; 5...Be6 6.Nc3 a5 7.b5 Bd6 8.d3+=; 5...Bd6 6.Nc3 a5 7.Nb5 Be7 8.Be5+=) 6.d3 (6.Nc3 a5 7.b5 0-0 8.d3+=) 6...0-0 7.de4 (7.Nc3 a5 8.b5+=) 7...de4 8.Qd8 Rd8 9.Nd2 c5 10.b5 Nbd7 11.Nh3 Nb6 12.0-0-0 Na4 13.Bf6 Bf6 14.Ne4 Bb2 15.Kb1 Bh3 16.gh3 b6 17.Bc4 Be5 18.Bd5 Rac8 19.f4 Nc3 20.Nc3 Bc3 21.e4 Bd4 22.Rd3 Kf8 23.c3 Bf6 24.Kb2 c4 25.Rdd1 Rc5 26.a4 Be7 27.Rd4 Rd6 28.Re1 (28.Rc4? Rdd5 29.Rc5 Rc5-+) 28...Rh6 29.Bc4 Rh3 30.Kb3 White prepares e5 30...Rh2 31.Rd7 g6 (31...Rc8 32.Ra7 Rd8 33.Rb7+-) 32.Ra7 Rd2 (32...Rh4 33.Rf1 f5 34.Ra8 Kg7 35.Rg8 Kh6+-) 33.Rb7 Rd6 34.e5 (34.e5 Rd8 35.Rb6+-) 1–0. garcia2102 (2025) – soltpl (2045), gameknot.com, 2015.

4.Nf3 Bb4 5.Be5 0-0 6.a3 +=.

4.Nf3 e4-/+ 5.Nd4 Bb4 6.a3 Be7 7.Be2 0-0 8.0-0 c5 9.Nf5?? (better is 9.Nb3-/+) 9...Bf5-+ 10.c4 d4 11.ed4 cd4 12.d3 ed3 13.Bd3 Bd3 14.Qd3 Nc6 15.Rd1 Bc5 16.Nd2 Re8 17.Nb3 Ne5 (17...Qd6 18.Nc5 Qc5 19.Rab1-+) 18.Qg3 (18.Qb1 Nfg4 19.Qe4 Qh4-+) 18...Nc4 19.Bd4 Bd4 (19...Ba3?! 20.Bc5 Nd5 21.Ba3 Na3 22.Qf3-+). Neumann,Frank – Wood,Brian, OP–2011–0-01980, 2012.

4.a3 (--> 1.b4 e5 2.a3 d5 3.e3 Nf6 4.Bb2).

4.a3 Nc6 (--> 3.e3 Nc6 4.a3 e5).

4.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6).

4.a3 Bd6 5.c4 c6 6.Nf3 Nbd7 (---> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

4.a3 Nbd7 (--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.a3 Nbd7 5.c4 c6 6.cd5 cd5 7.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

4.a3 Nbd7 5.c4 c6 6.Nf3 Bd6 (---> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

4.a3 Nbd7 5.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

5.c4 cb5 6.cd5= Qd5 7.Nc3 Qd7 (7...Qd8 8.Bb5 Nc6 9.Nf3=) 8.Bb5 Nc6 9.Nf3 e4 (9...Qg4 10.0-0 Bd7 11.d4+=) 10.Ne5+= Qd6 (10...Qe6 11.Qa4 Bd7 12.Nd7 (12.Ne4 Ne5 13.Be5 Qe5 14.Nf6 Kd8=) 12...Kd7 13.Rd1+-) 11.Qa4+- Bd7 (11...Qe5!? 12.Bc6 Kd8+-) 12.Nd7+- Kd7 13.Ne4 Ne4 14.Qe4 a6 15.Qg4 (15.Bc4 f6+-) 15...Kc7 (15...Qe6 16.Be2+-) 16.Bc6 Qc6?? (better 16...bc6 17.0-0 Qg6+-) 17.Rc1 Bc5 18.Bg7 Rhd8 (18...Rhc8 19.0-0 b6 20.d4+-) 19.Be5 (19.d4 Bb4 20.Ke2 Bc3+-) 19...Rd6 (19...Kb6+-) 20.Bd6 (better 20.Qc4 Kb6 21.d4 Rg6 22.Qc5 Qc5 23.Rc5 f6+-) 20...Qd6 (20...Kd6 21.Qf4 Ke6 22.Qh6 f6 23.Qh3 Kd6 24.Qg3 Kd7 25.Qg7 Ke6+-) 21.d4 Kb8 (21...b6 22.dc5 bc5 23.Qh5+-) 22.dc5 Qc7 (22...Qc6 23.Qg8 Ka7 24.Qf7 Qg2 25.c6+-) 23.0-0 Ka7 24.c6! bc6 25.Qd4 c5 (25...Qb6 26.Rc6 Qd4 27.ed4 Rd8+-) 26.Rc5 Qb6 (26...Rc8 27.Rc7 Kb8 28.Qa7) 27.Rc7 Kb8 28.Qb6 1–0. GuestDLNX – GuestMSNB, freechess.org, 2019.

5.Be5 Nbd7 6.Bb2 c5 7.c4 dc4 8.Bc4 Bd6 9.Nf3 0-0 10.Na3 a6 (10...Nb6 11.Qc2+=) 11.ba6+- ba6 12.0-0 Bb7 13.Ng5 h6 (better 13...Qb8!? 14.g3 Qc7+=) 14.Nf7+- Rf7 15.Qb3 (15.Bf7?! Kf7 16.Nc4 Qe7+=) 15...Ne5?? (better 15...Bd5 16.Bd5 Nd5 17.Qd5 Nb6+-) 16.Be5 (16.Bf7?! Nf7 17.Bf6 Qc7+-) 16...Be5 17.Bf7 Kh7 (17...Kf8 18.Qb7 Rb8 19.Qa7+-) 18.Qb7 (18.Qb7 Rb8 19.Qa7 Ba1 20.Ra1+-) 1–0. GuestSBKR – GuestKXZN, freechess.org, 2018.

(--> 1.b4 e5 2.b5 d5 3.Bb2 Bd6 4.e3 Nf6).

5.Nf3 Qe7 (--> 1.b4 e5 2.b5 d5 3.Bb2 Bd6 4.Nf3 Qe7 5.e3 Nf6).

(--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5).

5.c4 c6 6.a4 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6 6.a4).

5.a3 a5 6.b5 Bd6 7.Nf3 0-0 8.0-0+=.

5.a3 c5 6.bc5 Bc5 7.Nf3 Bd6 8.Nc3+=.

5.a3 Bd6 6.d3 a5 7.Nd2 c6 8.Ngf3 0-0 9.c4 ab4 10.ab4 Ra1 11.Ba1 dc4 12.dc4 Bb4 13.0-0 Qe7 14.Qc2 Bd6 15.Nb3 Bc7 (15...e4 16.Nh4-/+) 16.Rd1 (16.c5 Rd8-/+) 16...Nb8 (16...e4 17.Ng5-/+) 17.Bc3 Na6 18.Nh4 g6 (18...Rd8 19.Rd8 Qd8 20.Nf3-/+) 19.g3 (19.Nf3 Bf5 20.Qb2 Nd7=+) 19...Re8-/+ 20.Kg2 Bd6 21.Qb1 Bb4 22.Bb2 Ba3 23.Bc3 Bb4 24.Bb2 Bd6 25.Bc3 Bb4 ½–½. Pierre – GuestMario, internet, 2020.

5.a3 Bd6 6.Nf3 a5 7.b5 c5 8.bc6+=.

5.a3 e4 6.Nh3 a5 7.b5 Bd6 8.0-0+=.

5.b5 c5 (5...Bd6 6.Nf3 c5 7.bc6 bc6 8.Nc3+=; 5...e4 6.Nh3 Bd6 7.Nf4 a6 8.a4+=; 5...a6 6.Nf3 Bd6 7.Nc3 0-0 8.0-0+=) 6.Nf3 Bd6 7.0-0 0-0 8.d3+=.

5.Bc3 Ne4 (5...a5 6.ba5 Bd6 7.Nf3 Ne4 8.0-0+=; 5...Bd6 6.Nf3 Qe7 7.a3 0-0 8.0-0+=; 5...a6 6.Nf3 Bd6 7.0-0 0-0 8.d3+=) 6.Nf3 Nc3 7.dc3 c6 8.0-0+=.

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 d5).

5.c4 0-0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5).

5.c4 0-0 6.Nf3 Re8 (---> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 Re8).

5.c4 Nc6 6.Bb2 0-0 7.cd5 Nd5 8.Nf3 Re8 9.Be2 Qe7 10.0-0 Bg4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 Nc6 5.Bb2 0-0 6.e3 d5 7.cd5 Nd5 8.Nf3 Re8 9.Be2 Bg4 10.0-0 Qe7).

5.f4 0-0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0-0 5.f4 d5).

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.Nf3 d5 5.e3).

5.Nf3 Nc6 6.Bb2 0-0 7.c4 (---> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 Nc6 7.Bb2).

5...Nc6 6.Bb2 0-0 7.Be2 Bg4 8.0-0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0-0 7.Nf3 Re8 8.0-0 Bg4).

5...Nc6 6.Bb2 Bf5 7.Be2 0-0 8.0-0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0-0 7.Nf3 Re8 8.0-0 Bf5).

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0-0 5.Nf3 d5).

6.a3 Be7 7.c4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.a3 Be7 7.Nf3).

6.c4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3).

6.c4 Nc6 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 Nc6).

6.c4 Nc6 7.Bb2 Be6 8.cd5 Nd5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 Nc6 5.Bb2 0-0 6.e3 d5 7.cd5 Nd5 8.Nf3 Be6).

6.c4 Nc6 7.Bb2 Bf5 8.cd5 Nd5 9.Be2 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 Nc6 7.Bb2 Bf5 8.cd5 Nd5 9.Be2).

6.c4 Be7 7.Bb2 Nc6 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 Nc6 7.Bb2 Be7).

6.Be2 Nc6 7.Bb2 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0-0 7.Nf3).

6.Be2 Nc6 7.Bb2 Bg4 8.0-0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0-0 7.Nf3 Re8 8.0-0 Bg4).

5.Bb2 Bb4 6.Nf3 Bg4 7.Be2 0-0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6. Be2 0-0 7.Nf3 Bg4).

5.Bb2 Nb4 6.a3 Na6 (6...Nc6 7.Nf3=) 7.Nc3 (7.Bb5 Bd7 8.Ba6 ba6=) 7...c5 (7...Nc5 8.Nf3=) 8.Nce2 (8.Ba6 ba6 9.Rb1 Bd6=) 8...g6 (8...Bd6 9.Nc3=+) 9.Nf4= Bg7 (9...Nc7 10.Nf3=) 10.c3 (10.Bb5!? Kf8 11.Ba6 ba6 12.Rb1+=) 10...0-0 (10...Nc7 11.Nf3=+) 11.d4 (11.Ba6 ba6 12.Nf3 Rb8=+) 11...b6 (11...Rb8 12.Nf3=+) 12.Nf3= Bg4?? (better 12...c4=) 13.Ba6+- Ne4 (13...Rb8 14.0-0+-) 14.Bb7 Rb8 15.Bd5 Bf3 (15...Re8 16.h3 Bf5 17.Qb3+-) 16.Qf3 (worse 16.gf3 Nf6 17.Be4 Qd6+-) 16...Nf6 17.0-0 (better 17.Bc6+-) 17...g5 18.Rfe1 (18.Bc6!? gf4 19.e4 Rc8+-) 18...gf4 19.Bc4 (19.Bc6 fe3 20.Re3 Qd6+-) 19...Re8 (19...fe3 20.fe3 b5 21.Bd3+-) 20.ef4 (20.Bb5 Re4+-) 20...Re1 (20...b5 21.Re8 Qe8 22.Be2+-) 21.Re1 Qd7 (21...b5 22.Bd3+-) 22.Bd3 Re8 23.Re8 Ne8 24.Qg3 (24.dc5 bc5 25.h3 Qc8+-) 24...Nd6 25.Qh4 (25.f5 Qe7+-) 25...h6 26.Bc1 (26.h3 cd4 27.cd4 a6+-) 26...Nf5 (better 26...cd4!? 27.cd4 Qa4 28.Qd8 Bf8+-) 27.Qh3 (better 27.Qh5 Ne7 28.Bc4+-) 27...cd4? (27...Qe6 28.dc5 Qe1 29.Bf1 Qc1 30.Qf5 Bc3+-) 28.Bf5 Qa4 (28...Qe7 29.Kf1 Qc5 30.Qd3+-) 29.Qd3 dc3 30.Qd8 (30.Be4!? Qd4+-) 30...Bf8 31.Bh7 (31.h3 Qb3+-) 31...Kg7?? (31...Kh7 32.Qd3 Kg8 33.Qg3 Bg7-/+) 32.h3 (32.Bb1!? Bc5 33.Qd3 Kf8+-) 32...Ba3? (better 32...Kh7 33.Qf8 Qd1 34.Kh2 Qc1 35.Qf7 Kh8 36.Qf8 Kh7+-) 33.Qg8+- Kf6 34.Qd8 (better 34.Be3!? Ke7 35.Qc8+-) 34...Kg7 35.Qg8 Kf6 36.Ba3 (better 36.Be3!? Ke7 37.Qc8 Qd1 38.Kh2 Bc5 39.Bc5 bc5 40.Qc5 Qd6 41.Qa7 Kf8+-) 36...Qa3 37.Qh8 Ke7 38.Qe5 Kf8 39.f5 (39.Qf6 Qc1 40.Kh2 Qd2+-) 39...c2 40.Qb8 Kg7 41.Qg8 Kf6 42.Qd8?? (better 42.Qh8 Ke7 43.f6 Ke6 44.Qc8 Kf6 45.Qc2 (45.Bc2?! Qc1 46.Kh2 Qf4 47.Kh1 Qc1 48.Kh2 Qf4 49.Kg1 Qc1 50.Kh2=) 45...Qa1 46.Kh2+-) 42...Kg7= 43.Qg8 Kf6 44.Qh8 Ke7 45.f6 (45.f6 Ke6 46.Qc8 Kf6 47.Qc2 (47.Bc2?! Qc1 48.Kh2 Qf4 49.Kh1 Qc1 50.Kh2 Qf4 51.Kg1 Qc1 52.Kh2=) 47...Qa1 48.Kh2+-) 1–0. Agiant – Fumblevore, lichess.org, 2018.

5.Bb2 Nb4 6.a3 Nc6 7.Nf3 (--> 1.b4 e5 2.Bb2 d5 3.Be5 Nc6 4.Bb2 Nb4 5.a3 Nc6 6.Nf3 Nf6 7.e3).

5.Bb2 Be6 6.b5 Nb4?? (better 6...Na5+=) 7.c3 (7.a3 a5+-) 7...Na2 8.Ra2 d4 9.Ra1 de3 10.fe3 Bd6 11.Nf3 Bg4 (11...0-0 12.Be2+-) 12.Be2 0-0 13.0-0 Ne4 (13...Re8 14.c4+-) 14.c4 Bf3 (14...a5 15.d3 Nf6 16.Nd4+-) 15.Bf3 (15.gf3?! Bh2 16.Kg2 Qg5 17.Kh2 Qg3 18.Kh1 Qh4 19.Kg1 Qg3 20.Kh1 Qh4 21.Kg2 Qg3 22.Kh1=) 15...Qh4 16.Be4 (better 16.g3 Ng3 17.Qe1 Qc4 18.hg3 Qb5+-) 16...Qh2 (16...Bh2 17.Kh1 Bg3 18.Kg1 Qh2) 17.Kf2+- Bg3 (17...Qh4 18.Kf3 Qh5 19.g4 Qh3 20.Ke2 Qg4 21.Kd3 Qd1 22.Rd1+-) 18.Ke2 Rfe8 (18...Qh4 19.d3 Be5 20.Nc3+-) 19.Rh1 (19.Bb7 Rab8 20.Rh1 Rb7 21.Rh2 Bh2+-) 19...Qh1 (19...Re4 20.Rh2 Bh2 21.Qh1+-) 20.Qh1 Re4 21.Qh3 Be5 (21...Bd6 22.Qf3 Ree8 23.Qb7+-) 22.Be5 (22.Ra7 Re8 23.Be5 R4e5 24.Rb7 Rc5+-) 22...Re5 23.Nc3 (23.Ra7 Rf8+-) 23...Rae8 (23...Re6 24.Nd5 c6 25.Nc7+-) 24.Rh1 (better 24.Ra7 c6+-) 24...h6 25.Qf3 a6 (25...c6 26.bc6 bc6 27.Qc6+-) 26.ba6 (better 26.Qb7!? ab5 27.cb5 Rg5+-) 26...ba6 27.Nd5 c6 28.Nb4 a5 (28...R5e6 29.Nc6 Rc8 30.Nd4+-) 29.Nc6 Rc5 30.Rf1 Rf8 (30...f6 31.d4 Rg5 32.d5+-) 31.Ne7 Kh8 32.Ng6 Kg8 33.Nf8 Kf8 34.Qf7 1–0. GuestBVDJ – Tonwixxx, freechess.org, 2017.

5.Bb5 Bb4 6.Nc3 =.

5.Bb5 Bb4 6.Bc6 bc6 7.Nf3 Ba6 (7...0-0!?=) 8.Nd4+= Bb5? (better is 8...Bb7+=) 9.a4+- (9.Nb5?! cb5 10.a4 ba4+=) 9...Qe7 (9...Nd7 10.Bg7 (worse is 10.ab5 Ne5 11.f4 Nc4+/–) 10...Rg8 11.ab5 Rg7 12.c3+- (worse is 12.Nc6 Qf6+/–)) 10.f4 (better is 10.Bf6 Qf6 11.ab5 cb5 12.c3+-) 10...Ba6 11.Nc6 Qc5 12.Nb4 Qb4 13.Bc7 (13.Nc3 c6+-) 13...0-0 (13...Rc8 14.Be5+-) 14.Be5+- Ne4 15.Qg4 g6 16.f5 (better is 16.Nc3+-) 16...f6? (better is 16...Bc8+/–) 17.Bc3+- Qe7 18.fg6 hg6 19.Qg6 Kh8 20.Qh5 Kg7 21.Bd4 Rac8 22.c3 Bc4 23.Na3 Bd3 24.Qd5 Rfd8 25.Qf5 Nc5 26.Qg4 Kf8 27.Qh4 Rc6 28.Qh6 Ke8 29.Qh5 Kd7 30.Nb5 a6 31.Qd5 Rd6 32.Nd6 Qd6 33.Qc5 Qc5 34.Bc5 f5 35.0-0-0 Rb8 36.Bb4 a5 37.Rhe1 ab4 38.Kb2 b3 39.a5 Bc2 40.Ra1 Kc6 41.a6 Ra8 42.Ra5 Kb6 43.Rea1 Ra7 44.d4 Kc6 45.c4 Kd6 46.Kc3 Ke6 47.Rb5 Kf6 48.Rb7 Ra6 49.Ra6 Kg5 50.Rab6 Be4 51.Rg7 Kh5 52.Rh7 Kg5 53.h4 Kg4 54.Rg6 1–0. Yannick – Jule, playchess.de, 2006.

5.Bb5 Bd7 6.Bc6+= Bc6 7.a3 Bd6 8.Nf3 0-0 9.Nc3 Be5 10.Ne5 Re8 11.d4 Ne4 12.Ne4+- de4 13.Nc6 bc6 14.Qg4 Rb8 15.0-0 Qf6 16.f3 ef3 17.Rf3 Qe6 18.Qe6 Re6 19.Re1 Rbe8 20.Kf2 g6 21.g4 Kg7 22.h3 Re4 23.c3 R8e6 24.Ke2 h6 25.Kd3 Rd4?? 26.cd4 (26...a6 27.e4+-; 26.ed4?! Re1 27.Kc4 f6+/–) 1–0. mtra – jerrykr, Internet, 2002.

5.Bb5 Bd7 6.Bf6 Qf6 7.c3 Ne5 (7...Bb4!? 8.Qb3 Be7=) 8.Bd7+= Kd7 9.d4 Nc4 10.Nf3 Re8 11.0-0 Kc8 12.Qa4 Bd6 (12...Re6!?+/–) 13.Qa7+- b6 (13...c6+-) 14.Qa8 Kd7 15.Qd5 Nb2 (15...Qe6 16.Qb5 c6 17.Qa6+-) 16.Qb3 Nd3 17.Nbd2 (17.Qc2 Qg6 18.Rd1 Nf2 19.Qf2 Qe4+-) 17...Re7 (17...Kd8 18.Qb1 Qg6 19.Nc4+-) 18.Qc2 (better is 18.e4 Rhe8 19.Qa4 Kd8+-) 18...Nf2 (18...Qg6 19.Rfd1 b5+-) 19.Rf2 Re3 (19...Kc8 20.a4 Re3 21.Ne5+-) 20.Nc4 Rf3 21.Rf3 (21.Rf3 Qe6 22.Qa4 Kd8 23.Nd6 cd6 24.Rf7 Qf7 25.Qa8 Ke7 26.Qb7 Kf8 27.Qc8 Qe8 28.Rf1 Ke7 29.Re1 Kf6 30.Re8 Re8 31.Qe8+-) 1–0. Hal1958 – RookedRalph, playchess.de, 2004.

5.Bb5 c6!? 6.Bd6 Qd6=.

5.Bb5 Bd7 6.Bd7+- Nbd7 (6...Nfd7 7.Bd6 Qf6 8.Nc3 Qd6 9.Nf3+-) 7.Bd6 cd6 8.Nf3 0-0 9.0-0 Nb6 (9...Re8 10.Nd4+-) 10.Nd4 (10.d3 Re8+-) 10...Qd7 (10...Re8 11.Qf3+-) 11.d3 (11.c3 a5+-) 11...Rfe8+- 12.Nc3 a6 (12...Rac8 13.Qd2+-) 13.a4 Re7 (13...Qc7 14.Nce2+-) 14.Qd2 (14.a5 Rc8+-) 14...h6 (14...Qc7 15.a5 Nbd7 16.Nce2+-) 15.a5 Nc8 16.f4 (better 16.Nce2+-) 16...Ng4? (better 16...Na7+-) 17.Nd5+- Na7 (17...Re8+-) 18.Nb6 Qc7 1–0. DEFFM – GuestJVJL, freechess.org, 2018.

5.Bd6+= cd6 (5...Qd6 6.a3+=) 6.c4 (6.Nf3!?+/–) 6...0-0 7.cd5 Nd5 8.Bc4 (8.a3 a5+=) 8...Be6 (8...Nb4 9.Nf3=+) 9.Nf3 (9.Bd5 Bd5 10.Nf3=) 9...a6 (9...Nb4 10.Be6 fe6 11.Qb3=+) 10.0-0 (10.Qb3 Qf6 11.d4 Nb6 12.Be6 fe6+/–) 10...b5 (10...Ne3 11.de3 Bc4 12.Re1=) 11.Bb3 (11.Bd5 Bd5 12.Nc3 Bc6+/–) 11...Nc6 (11...Nb4!? 12.Nc3 N8c6=) 12.a3+= Ne5 13.d4 Nf3 (13...Nc4 14.Bc4 bc4 15.Re1+/–) 14.Qf3 Rc8?? (better is 14...Nf6 15.Nd2 Qe7+/–) 15.Bd5+- Bd5 16.Qd5 Qe7 (16...Qd7 17.a4 ba4 18.Qa5+-) 17.Nd2 (17.a4 Rb8+-) 17...Rc2 (17...Qe6 18.Qe6 fe6 19.a4+-) 18.Rfd1 (18.Ne4 Rc4+-) 18...h6 (18...Rfc8 19.Ne4 R8c6 20.Qf5+-) 19.Ne4 Kh8 (19...Rd8 20.a4+-) 20.Nd6 Rd8 (20...Qe6 21.Qf5 Qf5 22.Nf5 Rd8+-) 21.Nf7 Kh7 22.Nd8 Rc7 23.Ne6 Rd7 (24.Qd7! Qd7 25.Nf8 Kg8 26.Nd7 g5+-) 0–1. wesolyPolak – just_tasty, GameColony.com, 2002.

4.Nf3 c5 5.bc5+= Nbd7 6.Nd4 Nc5 7.Ne6 fe6 8.Bd4 Nfd7 9.Bb5 Qc7 10.Qh5 g6? 11.Qh3 e5 12.Bc5 0-0-0 13.Ba7 Qc2 14.Na3 Qf5 15.Rc1 (15...Nc5 16.Rc5) 1–0. miehnekort – meeheal, Yahoo, 2005.

4.Nf3 Bg4 5.Be2 e6 6.b5 c6 7.a4 (7.Nc3 Bd6=) 7...cb5 (7...Nbd7 8.Nc3=) 8.ab5 Bd6 (8...Nbd7 9.Nc3=) 9.0-0 (9.Nd4 Be2 10.Qe2 Nbd7=) 9...Qc7= 10.h3 (10.Bf6 gf6 11.g3 Rg8=) 10...Bf3 11.Bf3 Ne4? (better 11...Nbd7=) 12.Bg7 (12.Be4 de4 13.Bg7 Rg8+-) 12...Rg8 13.Bd4 Bh2? (better 13...Ng5+-) 14.Kh1 f5 (14...a5 15.Be4 de4+-) 15.Ra7 Ra7 16.b6 Ng3 (16...Qc8 17.ba7 Nc6 18.Be4 Be5 19.Qh5 Kd7 20.Be5 Ne5+-) 17.fg3 Qg3 18.ba7 Ke7 19.a8Q Nd7 20.Qb7 h5 21.Bd5! ed5 22.Qd5 Rd8 23.Qh5 Nf6 (23...Qg2 24.Kg2 Rg8 25.Kh2 Rg7 26.Qh4 Rg5 27.Qg5 Nf6 28.Qf6 Ke8 29.Qff7) 24.Qhf7 1–0. GuestSBVJ – GuestMFXD, freechess.org, 2020.

5.Nc3 Bg7 A) 6.Nd4 Bd7 (6...0-0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Bd3 Qd6 11.0-0 Nc4; 6...a5 7.b5 0-0 8.Ne6 fe6 9.Bd3 Nbd7 10.Ba3 Ne5 11.0-0 Ne8) 7.Be2 0-0 8.b5 c5 9.Nb3 Qc7 10.h4 Be6 11.h5 gh5; B) 6.Be2 0-0 (6...a5 7.b5 0-0 8.0-0 Qd6 9.a4 Qb6 10.Ng5 Nbd7 11.d4 Bf5; 6...a6 7.Na4 Nc6 8.Nc5 0-0 9.Rb1 Bc8 10.Ne5 Qd6 11.Ncd3 a5; 6...Ne4 7.Ne4 Bb2 8.Nc5 Ba1 9.Nb7 Qc8 10.Qa1 0-0 11.Nc5 Nd7; 6...Nc6 7.b5 Na5 8.0-0 0-0 9.Nd4 Qd6 10.Ne6 fe6 11.d3 a6) 7.0-0 a6 8.Ng5 Bd7 9.a3 Nc6 10.d4 Bf5 11.Qd2 Qd6; C) 6.Ng5 Bf5 (6...0-0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Bd3 Nc4 11.Bc4 dc4; 6...Bc8 7.Be2 0-0 8.0-0 Nc6 9.b5 Na5 10.Ba3 a6 11.ba6 b6; 6...a5 7.Ne6 fe6 8.b5 0-0 9.d4 Qd6 10.Be2 Nbd7 11.0-0 Nb6) 7.Bd3 Bd3 8.cd3 Nc6 9.0-0 0-0 10.Qb3 a5 11.b5 Nb4; D) 6.Na4 a5 (6...0-0 7.Nc5 Bc8 8.Be2 Nbd7 9.Nd3 a5 10.a3 Ne4 11.Bg7 Kg7; 6...b6 7.Bb5 Bd7 8.Bd7 Qd7 9.Nc3 0-0 10.0-0 Ne4 11.Rb1 Bc3; 6...Nc6 7.Nc5 0-0 8.b5 Na5 9.Ne6 fe6 10.Bc3 Nc4 11.Bc4 dc4) 7.Nc5 ab4 8.Nb7 Qc8 9.Nc5 0-0 10.a3 ba3 11.Ra3 Ra3; E) 6.Ne2 0-0 (6...Nc6 7.b5 Na5 8.Bc3 Nc4 9.Nf4 0-0 10.Bc4 dc4 11.Qe2 Bd5; 6...a6 7.Ned4 Nc6 8.Ne6 fe6 9.a4 Nb4 10.Rb1 Nc6 11.Bf6 Bf6; 6...a5 7.a3 0-0 8.Nf4 Bg4 9.h3 Bf3 10.Qf3 Qd6 11.c4 Nbd7; 6...Qc8 7.Nf4 0-0 8.h4 Bg4 9.Bf6 Bf6 10.Nd5 Nc6 11.Nf6 ef6) 7.Nf4 a5 8.a3 Na6 9.Ne6 fe6 10.Qb1 c6 11.h4 ab4.

5.c4 Bg7 A) 6.cd5 Bd5 7.Qa4 Nbd7 8.Nc3 0-0 9.Be2 Nb6 10.Qc2 Qd6 11.Rb1 Bc4; B) 6.Nc3 0-0 7.Nd4 Nc6 8.Ne6 fe6 9.b5 Na5 10.cd5 Ne4 11.Ne4 Bb2; C) 6.Ng5 0-0 (6...a5 7.b5 Bf5 8.Nc3 0-0 9.cd5 h6 10.Nf3 Nd5 11.d4 Qd6; 6...a6 7.Ne6 fe6 8.Nc3 0-0 9.d4 Nc6 10.a3 e5 11.de5 Ne5; 6...Bf5 7.cd5 0-0 8.Bc4 a5 9.ba5 Ra5 10.Qb3 Nbd7 11.Qb4 b6) 7.Nc3 Bf5 8.cd5 h6 9.e4 Bg4 10.f3 hg5 11.fg4 Ne4; D) 6.Nd4 0-0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Nd2 c6 11.c5 cb5; E) 6.Qa4 Nbd7 7.cd5 Bd5 8.Nc3 0-0 9.Be2 Nb6 10.Qc2 Qd6 11.a3 c6.

5.Nd4 Bd7 A) 6.Nc3 Bg7 (6...e5 7.Nf3 e4 8.Ne5 Bb4 9.Nd7 Qd7 10.Nd5 Qd5 11.Bf6 0-0) 7.Be2 0-0 8.b5 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; B) 6.Qf3 Bg7 7.Nc3 e5 8.Nb3 e4 9.Qd1 0-0 10.b5 a6 11.a4 ab5; C) 6.b5 e5 (6...Bg7 7.Nc3 0-0 8.Be2 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; 6...a6 7.Nc3 Bg7 8.a4 0-0 9.Be2 c5 10.Nb3 Qc7 11.0-0 Be6) 7.Nb3 Bd6 8.c4 a6 9.d4 dc4 10.de5 Bb4 11.N3d2 Ne4; D) 6.f4 Nc6 (6...Bg7 7.Nc3 0-0 8.b5 c5 9.Nb3 Qc7 10.Be2 a6 11.0-0 ab5; 6...e6 7.b5 a6 8.g4 h6 9.a4 g5 10.f5 ef5 11.Nf5 h5; 6...Bh6 7.Nc3 0-0 8.Bd3 Nc6 9.Nc6 bc6 10.0-0 a5 11.b5 cb5; 6...Na6 7.b5 Nc5 8.Nc3 Bg7 9.Be2 0-0 10.0-0 Re8 11.Qe1 Bg4) 7.Nc6 bc6 8.Nc3 Bg7 9.Bd3 0-0 10.0-0 Rb8 11.a3 a5; E) 6.c4 e5 (6...dc4 7.Bc4 Bg7 8.Nc3 0-0 9.0-0 Nc6 10.Nc6 Bc6 11.b5 Bd7; 6...Bg7 7.cd5 Nd5 8.Qb3 Nb6 9.Nf5 gf5 10.Bg7 Rg8 11.Bc3 Ba4) 7.Nf3 e4 8.Ne5 Bd6 9.cd5 0-0 10.Bc4 Qe7 11.d4 ed3.

5.Nd4 Bg7 A) 6.Ne6 fe6 7.Nc3 0-0 8.f4 Nc6 9.b5 d4 10.Na4 Nb4 11.Bd4 Ne4; B) 6.h4 0-0 (6...Bd7 7.Nc3 0-0 8.h5 e5 9.Nf3 Nh5 10.Nd5 Be6 11.c4 c6; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.Bd3 0-0 10.0-0 Qd6 11.Ba3 Qd7; 6...Qd7 7.Nc3 Nc6 8.Bb5 0-0 9.0-0 a5 10.ba5 Ra5 11.Nb3 Ra7; 6...Na6 7.h5 Nb4 8.Ne6 fe6 9.h6 Bf8 10.Be5 a6 11.Nc3 Nc6) 7.Nc3 Nc6 8.Ne6 fe6 9.b5 Na5 10.d4 Qd6 11.Rb1 h5; C) 6.Be2 Bd7 (6...0-0 7.0-0 Bd7 8.Nb3 a6 9.Nc3 Nc6 10.Nc5 Nb4 11.Ba3 a5; 6...Na6 7.Ne6 fe6 8.a3 0-0 9.d4 Ne4 10.0-0 Nb8 11.Nd2 Nd6; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.0-0 0-0 10.f3 Nd7 11.Qc1 c5) 7.Nc3 0-0 8.b5 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; D) 6.g3 0-0 (6...Bd7 7.Nc3 0-0 8.b5 e5 9.Nf3 Re8 10.Na4 a6 11.Nc5 ab5; 6...Bg4 7.Be2 Bh3 8.Bf1 Bf1 9.Kf1 0-0 10.Kg2 Nbd7 11.Nc3 Ne5) 7.Nc3 Bg4 8.Be2 Bh3 9.Nf3 Ne4 10.Qb1 Bf6 11.Ne4 de4; E) 6.Nc3 Bd7 (6...0-0 7.Ne6 fe6 8.d4 Qd6 9.a3 a5 10.b5 Nbd7 11.Be2 e5; 6...a5 7.b5 0-0 8.Be2 Qd6 9.h4 h5 10.Ne6 Qe6 11.0-0 Nbd7; 6...a6 7.Ne6 fe6 8.Bd3 Nc6 9.a3 0-0 10.0-0 a5 11.b5 Ne5) 7.h4 Na6 8.Ba6 ba6 9.Qe2 Qb8 10.Rb1 Qb4 11.Qa6 Qb6.

5.Be2 a6 A) 6.Nc3 Nc6 (6...Bg7 7.Na4 Nc6 8.Nc5 0-0 9.a3 Bc8 10.Ne5 Qd6 11.Nc6 Qc6) 7.Na4 b6 8.Ng5 Bf5 9.a3 Bg7 10.Bd3 h6 11.Nf3 Bd7; B) 6.Ng5 Nc6 (6...Bg7 7.Ne6 fe6 8.0-0 Qd6 9.c3 Nbd7 10.d4 a5 11.b5 e5; 6...Bf5 7.g4 Bc8 8.c4 h6 9.Nf3 dc4 10.Ne5 Nc6 11.Nc6 bc6; 6...Bh6 7.Ne6 fe6 8.0-0 Nc6 9.a3 Qd6 10.d4 0-0 11.Nd2 e5) 7.Ne6 fe6 8.0-0 Nb4 9.c3 Nc6 10.d4 Bg7 11.Qb3 Qd7; C) 6.Nd4 Bd7 (6...Nc6 7.Ne6 fe6 8.a3 Qd6 9.Nc3 Bg7 10.d4 0-0 11.f4 Qd7; 6...Bg7 7.Ne6 fe6 8.0-0 0-0 9.d4 Qd6 10.a3 a5 11.Nc3 Nbd7; 6...Qd6 7.Ne6 Qe6 8.Nc3 Bg7 9.0-0 0-0 10.d4 Nbd7 11.Qd2 Qd6; 6...Qd7 7.c4 dc4 8.Ne6 Qe6 9.Na3 b5 10.d3 Qd6 11.dc4 Qb4; 6...Bh6 7.Ne6 fe6 8.a3 0-0 9.Nc3 Nc6 10.d4 Qd6 11.f4 Bf4) 7.c4 dc4 8.Bc4 Bg7 9.Nc3 0-0 10.0-0 Nc6 11.Nc6 Bc6; D) 6.0-0 Nc6 (6...Bg7 7.Ng5 Bf5 8.c4 0-0 9.Nc3 h6 10.Nf3 Nc6 11.cd5 Nd5) 7.Nd4 Nd4 8.Bd4 Bg7 9.Nc3 0-0 10.Bf3 Qd6 11.Bc5 Qd7; E) 6.c4 Bg7 (6...Nc6 7.cd5 Bd5 8.Nc3 Bg7 9.0-0 0-0 10.a3 Be6 11.d4 Bf5; 6...dc4 7.Ng5 Bd5 8.e4 h6 9.ed5 hg5 10.Nc3 Nbd7 11.Ne4 Nb6; 6...Bh6 7.cd5 Bd5 8.Nc3 Nc6 9.Nd5 Qd5 10.Nd4 Nd4 11.Bd4 e5) 7.Nc3 0-0 8.Qb3 Nc6 9.0-0 b5 10.Nd5 bc4 11.Nf6 Bf6.

5.Be2 Na6 A) 6.Bf6 ef6 7.a3 Bd6 8.Nc3 0-0 9.0-0 Nb8 10.Nd4 Nc6 11.Ne6 fe6; B) 6.c4 dc4 7.Na3 Bg7 8.Nc4 0-0 9.a3 c5 10.Qa4 cb4 11.ab4 Rc8; C) 6.Bb5 c6 (6...Bd7 7.Ba6 ba6 8.Bf6 ef6 9.Nc3 c6 10.a3 a5 11.b5 Bc5) 7.Ba6 ba6 8.Qe2 a5 9.Bf6 ef6 10.b5 c5 11.Nc3 Be7; D) 6.a3 Bg7 (6...Bh6 7.Nc3 0-0 8.0-0 c5 9.Ba6 ba6 10.bc5 Qa5 11.d4 Rab8; 6...c6 7.0-0 Bg7 8.Bd4 0-0 9.Nc3 Ne4 10.Bg7 Kg7 11.Ne4 de4) 7.Bd4 Nb8 8.b5 a6 9.ba6 Na6 10.Nc3 0-0 11.h4 b6.

5.Be2 Bg7 6.0-0 (6.Nc3 0-0 (6...a5 7.b5 0-0 8.Nd4 Qd6 9.h4 h5 10.a4 Qb6 11.0-0 Nbd7; 6...Nc6 7.b5 Na5 8.0-0 0-0 9.Nd4 Qd6 10.f4 Rfd8 11.a4 Qb6) 7.0-0 a6 8.Nd4 Bd7 9.Nb3 Nc6 10.Nc5 Nb4 11.Ba3 a5; 6.Nd4 Bd7 (6...0-0 7.Ne6 fe6 8.0-0 Nc6 9.b5 Na5 10.f3 c5 11.bc6 Nc6; 6...Na6 7.Ne6 fe6 8.a3 0-0 9.d4 Ne4 10.0-0 c6 11.Nd2 Nd6; 6...Qc8 7.b5 c5 8.Ne6 Qe6 9.Nc3 Nbd7 10.0-0 0-0 11.d4 Rac8; 6...Qd7 7.Nc3 Nc6 8.Ne6 Qe6 9.b5 Na5 10.0-0 Nc4 11.Bc4 dc4; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.d4 Nc4 10.Bc4 dc4 11.0-0 a6) 7.Nc3 0-0 8.b5 c5 9.Nb3 Qc7 10.0-0 Be6 11.f4 Nbd7; 6.Ng5 Bf5 (6...0-0 7.Ne6 fe6 8.0-0 Nc6 9.b5 Na5 10.f3 c5 11.bc6 Nc6; 6...Bd7 7.Nc3 0-0 8.b5 Bf5 9.0-0 a6 10.a4 ab5 11.ab5 Ra1) 7.b5 0-0 8.Nc3 a6 9.a4 c5 10.Bd3 Bd3 11.cd3 d4) 6...0-0 (6...a6 7.Nd4 0-0 8.Ne6 fe6 9.d4 Qd6 10.a3 Nbd7 11.Nd2 b5; 6...Nc6 7.b5 Na5 8.Nd4 0-0 9.Ne6 fe6 10.f3 c5 11.Nc3 d4; 6...a5 7.b5 Nbd7 8.Ng5 Nc5 9.Nc3 Bf5 10.g4 Bc8 11.d4 Ne6) 7.d3 (7.Nd4 Bd7 8.Nc3 Nc6 9.Bf3 e5 10.Nc6 bc6 11.Na4 Qe7) 7...Qd6 (7...Na6 8.Ba3 Ne4 9.Nd4 c5 10.bc5 Nec5 11.Nd2 Qa5) 8.a3 Bg4 (8...a6 9.Be5 Qd7 10.Bd4 Nc6 11.Nc3 Nd4) 9.Nbd2 Nbd7 (9...Nc6 10.b5 Na5 11.Be5 Qb6) 10.e4 (10.h3 Bf5 11.Nd4 a5) 10...de4 (10...Ne4 11.Bg7 Nd2) 11.Ne4 (11.de4!? Bf3 12.Bf3=) 11...Ne4+= 12.Bg7 Nf2 13.Rf2 Kg7 14.Ng5 Be2 15.Qe2 Qd4 16.Raf1 h6 (better is 16...Ne5=) 17.Qe7?? (better is 17.c3 Qb6 18.Qe7+/–) 17...hg5-+ 18.Kh1? (18.c3 Qd5 19.Rf5 Qe6 (worse is 19...gf5 20.Qg5 Kh7 21.Rf4 Qg2 22.Kg2 Nf6 23.Rh4 Nh5 24.Rh5) 20.Qg5 Rae8-+) 18...Qd5 (better is 18...Qf2! 19.Rf2 Rae8 20.Qe2 Re2 21.Re2-+) 19.c4 Qd3?? (better is 19...Qe6 20.Qg5 Rae8-+) 20.Rf7 Kg8 (20...Rf7 21.Rf7 Kg8 22.Rg7 Kh8 23.Rh7 Kg8 24.Qg7) 21.Rg7 Kh8 22.Rh7 Kg8 23.Qg7 1–0. Kaczmarczyk,Przemyslaw – Bota,Rafal, OMTSz Poland, 2010.

5.Be2 Bh6 A) 6.Nc3 a6 (6...0-0 7.0-0 Nc6 8.b5 Na5 9.Nd4 Qd6 10.f4 Nc4 11.Bc4 dc4; 6...a5 7.b5 Qd6 8.a4 Nbd7 9.Ba3 Qb6 10.Nd4 Nc5 11.0-0 Rd8; 6...Na6 7.a3 0-0 8.Rb1 Nb8 9.h4 Nc6 10.h5 g5 11.b5 Na5; 6...Nc6 7.b5 Na5 8.Nd4 Qd6 9.0-0 0-0 10.f4 Nc4 11.Bc4 dc4) 7.Nd4 Qd7 8.Ne6 fe6 9.0-0 Nc6 10.a3 e5 11.d4 ed4; B) 6.0-0 0-0 (6...a5 7.b5 0-0 8.Nd4 Nbd7 9.Ne6 fe6 10.Nc3 Nc5 11.Ba3 Nce4; 6...Nc6 7.b5 Na5 8.Nd4 0-0 9.Ne6 fe6 10.Nc3 Qd6 11.a4 e5; 6...a6 7.Nd4 0-0 8.Ne6 fe6 9.a3 Qd6 10.Nc3 Nbd7 11.f4 c6; 6...Qc8 7.c4 dc4 8.Na3 c3 9.Bc3 0-0 10.Bc4 Nd5 11.Qb3 Rd8; 6...Na6 7.Ba3 Ne4 8.Nd4 Bg7 9.b5 Nb8 10.d3 Nd6 11.Ne6 fe6) 7.Nc3 a5 8.b5 c5 9.h4 Qd6 10.Ng5 a4 11.Ba3 Nbd7; C) 6.b5 a6 (6...Nbd7 7.0-0 0-0 8.Nd4 Nc5 9.Ba3 Nce4 10.Ne6 fe6 11.f3 Nd6) 7.Nd4 ab5 8.Ne6 fe6 9.Bb5 c6 10.Bd3 0-0 11.Nc3 Nbd7; D) 6.h3 0-0 (6...a5 7.b5 0-0 8.Nd4 Bc8 9.Nc3 c5 10.Nf3 a4 11.a3 Be6) 7.0-0 a6 8.a3 Nc6 9.Nd4 Bd7 10.Nc6 Bc6 11.Bd4 Qd6; E) 6.Nd4 Bd7 (6...Qd7 7.b5 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 0-0 11.h4 Qd6; 6...0-0 7.h4 Bd7 8.h5 g5 9.Nb3 a6 10.Bf6 ef6 11.Nc3 Nc6; 6...a5 7.b5 Nbd7 8.Nc3 0-0 9.Ne6 fe6 10.Ba3 Bg7 11.d4 Nb6; 6...Bc8 7.Nc3 0-0 8.0-0 Nc6 9.Nc6 bc6 10.Na4 a5 11.a3 Bf5; 6...a6 7.Ne6 fe6 8.0-0 Nc6 9.a3 0-0 10.d4 Qd6 11.Nd2 e5) 7.Nc3 0-0 8.Nb3 a6 9.h4 Nc6 10.h5 g5 11.a3 b6.

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6).

4.b5 c5 5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5).

4.b5 c6 5.a4 (---> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a4 Bf5 5.b5).

4.d3 e6 5.a3 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d3).

4.d4 e6 5.a3 c6 6.Nf3 Nbd7 7.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

4.Be2 c6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2).

4.Be2 Nbd7 5.Nf3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

4.Nf3 Nc6 5.a3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nc6).

4.f4 g6 5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Bf5).

5.c4 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.Nf3 e6 6.Be2 Bd6 7.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2 Bd6).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.Nf3 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

5.Nf3 Bd6 6.Be2 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2).

5.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.b5).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.Nf3 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.Bc4 Nbd7 6.b5 e6 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.Bc4 Nbd7 6.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

6.a3 c5 7.b5 Nbd7 8.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6 7.a3 c5 8.b5).

6.a3 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6 7.a3).

6.b5 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4).

6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6).

6.Nf3 Nbd7 7.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

5.b5 e6 6.Nf3 Nbd7 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.a3 e6 6.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.c5 Nc6 6.a3).

5.a3 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nc6 6.a3).

5.b5 dc4 6.Bc4 e6 7.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6).

5.a3 c5 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 c5 6.c4).

5.a3 c6 6.Nc3 Nbd7 7.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Nc3).

5.a3 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 Nbd7 6.d4 c6 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

5.a3 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Qb3 c6 6.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.Qb3).

5.b5 dc4 6.Bc4 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.b5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.b5 Nbd7 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.b5 Nbd7 6.Nf3 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.c4).

5.b5 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

5.c5 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5).

5.c5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5).

5.c5 Be7 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 Be7).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4).

5.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Nf3 Nbd7 6.a3 c5 7.bc5 dc4 8.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.a3 Nbd7 7.Nf3 c5 8.bc5).

5.Nf3 Nbd7 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Nf3 Nbd7 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.Nf3 Nbd7 6.c5 Be7 7.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2 Be7).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Be2 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2).

5.a3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.c4 c5 6.b5 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.c4 c6 6.c5 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 e6 6.a3 c6 7.Be2 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2).

5.c4 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 Bd6).

5.c4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.c4 e6 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

5.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 Nbd7).

5.Be2 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.Be2 e6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 TESTC800 5.b5 Nbd7 6.Be2 Bd6).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

5.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.a3 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 Bd6 6.c4 c6 7.d4 Nbd7 8.Nbd2 0-0 9.h3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.d4 Nbd7 7.c4 c6 8.h3 0-0 9.Nbd2).

5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.c4 a5 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 a5 7.a3).

5.a3 Nbd7 6.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 dc4).

5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.a3 Be7 6.c4 dc4 7.Bc4 Bd3 8.Qb3 Bc4 9.Qc4 Nc6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nc6 6.a3 dc4 7.Bc4 Bd3 8.Qb3 Bc4 9.Qc4 Be7).

5.a3 Be7 6.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3 Be7).

5.b5 c5 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5).

5.b5 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.b5 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.b5 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

5.b5 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.b5 Nbd7 6.d4 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.d4).

5.b5 h6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 h6).

5.b5 h6 6.Be2 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.Be2 h6).

5.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4).

5.c4 dc4 6.Bc4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6).

5.c4 c5 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4).

5.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 Nbd7 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 Nbd7 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.c4 Nbd7 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 Nbd7 6.c5 Be7 7.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2 Be7).

5.c4 Be7 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

5.Be2 e6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 e6 4.f4 Nf6).

5.b5 c5 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nd7 4.f4 e6 5.Nf3 Ngf6 6.b5 c5).

4.Bb5 A) 4...Bd7 5.Be2 (5.Bd3 e5 6.Be5 Nc6 7.Nf3 Ne5 8.Ne5 Bb4=) 5...e6 6.a3 Bd6 7.Nf3 0-0 8.0-0 a5=; B) 4...c6 5.f3 (5.Be2 Be2 6.Ne2 e6 7.Bc3 Bd6 8.0-0 0-0+=) 5...Bf5 6.Be2 Qd6 7.g4 Bg6 8.a3 h6+=; C) 4...Nbd7 5.f3 Bh5 6.g4 Bg6 7.h4 h6 8.h5 Bh7+=.

4.Qc1 e6 5.a3 c5 6.bc5 Bc5 7.h3 Bh5 8.Be2 0-0 9.d3 Nc6 10.Nd2 d4 11.e4 Rc8 12.Qd1 Bg6 13.Ngf3 Nd7 14.0-0 e5 15.c3 dc3 16.Bc3 b6 17.Qb3 Qe7 18.Rfd1 Rfd8 19.Qb2 Qe8 20.Nb3 Bf8 21.a4 f6 22.a5 Nc5 23.ab6 ab6 24.Nc5 Bc5 25.Rdc1 Bh5 26.Qb1 Bf7 27.Ra6 Attacks the isolani on b6 27...Qe7 28.Bd2 Qb7 29.Qb5 Na7 30.Qa4 Nc6 31.Qb5 Na7 32.Qa4 b5 33.Qa1 Bb6 34.Rc8 Nc8 ½-½. marekt (2165) - unrulyqueen (2350), gameknot.com, 2021.

4.Be2 Qc8 5.b5 c6 6.a4 cb5 7.ab5 a6 8.Nf3 Nbd7 9.0-0 g6 10.d3 Bg7 11.Nbd2 0-0 12.h3 Bf3 13.Nf3 a5 14.Rc1 Re8 15.c4 dc4 16.dc4 Nc5 17.Qc2 Nfd7 18.Bg7 Kg7 19.Rfd1 e5 20.Nh4 h5 21.Bh5 Rh8 22.Nf5 gf5 23.Qf5 Nf6 24.Qg5 Kf8 25.Bg6 Rg8 26.Qf6 Rg6 27.Qh8 Rg8 28.Qh6 Rg7 29.Qd6 Kg8 30.Qe5 Qh3 31.Qg7 1–0. Poetzsch – Bortolin, 1969.

4.Be2 Qd7 5.a3 (5.Bg4 Ng4 6.Nf3 f6 7.Nc3 e5 8.a3 a5=) 5...Bf5 6.Nf3 e6 7.Nh4 Bg6 8.0-0 c5 =.

4.Be2 Nbd7?? 5.Bg4+- h6 6.Be2 e6 7.a3 Qe7 8.Nf3 0-0-0 9.d4 Ne4 10.Nbd2 g5 11.Bd3 f5 12.Ne5 Qf6 Black intends f4 13.Nd7 Rd7 14.Nf3 f4 15.Be4 de4 16.Ne5 fe3 17.fe3 Re7 18.Rf1 Qg7 19.Qg4 h5 20.Qe4 Qh7 21.Qh7 Reh7 22.0-0-0 Bh6 23.Rde1 g4 24.Rf7 Bg7 25.c4 25...Be5 26.Rh7 Rh7 27.de5 Rf7 28.Re2 1–0. Fournier,Frederic – Guest3424738, Partie amicale, 6m + 2s, 2008.

4.Ne2 Qd6 5.a3 (5.f3 Bd7 6.Nf4 e5 7.Nd3 e4 8.Nc5 Bc6=) 5...e5 6.h3 Bh5 7.d4 Nbd7 8.de5 Ne5 =.

4.Ne2 e5 5.Be5 Bb4 6.c3 Be7 7.Qa4 Bd7 8.Qf4 c5 =.

4.Ne2 e6 5.a3 (5.f3 Bf5 6.g4 Bg6 7.Nf4 Bd6 8.h4 e5=) 5...Bd6 6.f3 Bf5 7.Nd4 Bg6 8.Nb5 e5 =.

4.f3 Bd7 5.a3 (5.g4 h6 6.a3 e6 7.f4 a5 8.b5 Ne4-/+) 5...e6 6.Nc3 Bd6 7.Nb5 Bb5 8.Bb5 Nbd7 +=.

4.f3 Bf3?? 5.Qf3 (5.Nf3 a5+-) 5...Nc6 (5...Nbd7 6.a3+-) 6.a3 e6 7.c4 Be7 8.cd5 ed5 9.Bb5 0-0 10.Nc3 (10.Bc6 bc6 11.Ne2 Qd7+-) 10...Ne5 11.Qf2 Nfg4 12.Qe2 c6 13.Bd3 (13.d4 cb5 14.de5 Ne5+-) 13...Nd3 14.Qd3 f5 (14...Ne5!? 15.Qc2 Nc4+-) 15.Nf3 Rc8 (15...Bh4 16.g3 Be7+-) 16.h3?? (16.Qd4 Bf6 17.Qa7 Qc7+-) 16...Nh6? (better is 16...Bh4 17.Ke2 Nf2+=) 17.Ne2 Qc7 18.Nf4 Bd6? (18...Rce8+-) 19.Ne6 Bg3 20.Ke2 Qe7 21.Nf8 Rf8 22.Qd4 (better is 22.b5 f4+-) 22...b6 (22...f4 23.Qa7 Nf5 24.Qc5+-) 23.Ne5 (better is 23.Rhc1 Rc8+-) 23...Qb7 (23...Be5 24.Qe5 Qd7+-) 24.Nc6! f4 (24...Qc6 25.Qg7) 25.Qd5 Kh8 26.Ne5 (better is 26.ef4 Bf4 27.Raf1+-) 26…Qd5-+ (27.Rhc1 Qg2 28.Kd3 fe3 29.de3 Rd8 30.Bd4 Be5-+) 0–1. Nautiluschess – rusalka, ICS blitz, 2001.

5.Qe2 a6 6.Nf3 =.

5.Qe2 Qd6 6.Qb5 Nc6 7.a3 = (< 7.Qb7 Rb8 8.Qa6 Nb4 9.Qd6 cd6 -/+).

5.Qe2 Nbd7 6.Nf3 e6 7.a3 a5 8.b5 Bd6 9.c4 c5 10.0-0 dc4 (10...0-0 11.a4=) 11.Qc4 Nb6 12.Qc2 Qd7 (12...0-0 13.d3=) 13.a4+= Nbd5 14.Na3 Nb4 15.Qb1 0-0 16.Nc4 Be7 (16...Bc7 17.b6 Bd8 18.Nfe5+=) 17.d4 (17.Nb6 Qd3 18.Na8 Ra8+-) 17...cd4 (17...Nfd5 18.e4 Nf4 19.Nb6+/–) 18.Bd4 (18.Nb6 Qd8 19.Na8 de3 20.fe3 h6+/–) 18...Nfd5 19.Rd1 f6 (19...Rfc8!? 20.Qb3 Qc7+/–) 20.e4+- Nf4 21.Bf6! Ne2 (21...Bf6 22.Rd7 Discovered attack; 21...Rf6 22.Rd7 Discovered attack; 21...gf6 22.Rd7 Discovered attack) 22.Kf1+- (22.Kf1 Qc7 23.Be7 Qc4 24.Ne5+-) 1–0. Krivoshapko,Alexander – Bogachkova,Alena, 2013.

5.Qe2 Nbd7 6.Nf3 e6 7.a3 c6 8.c4 Bd6 9.d3 a5 10.c5 Bc7 11.0-0 0-0 12.Nbd2 (12.Nc3 e5=) 12...b6 (12...Qe7 13.d4=+) 13.cb6 (13.b5 bc5 14.bc6 Nb8=) 13...Bb6= 14.Rfc1 ab4 15.ab4 Qe7 16.Rab1 (16.Qd1 Qb4 17.Bf6 gf6 18.Rc6 Ra1 19.Qa1 Nc5=) 16...Rfc8 17.Bf6 (17.Bd4 Bd4 18.Nd4 Qd6=) 17...Nf6 (17...Qf6 18.Nb3=) 18.d4 (18.Ne5 Qd6 19.Ndf3 Nd7=) 18...Bc7 19.Ne1 (19.Ne5 Be5 20.de5 Nd7=) 19...Bd6 (19...Ra2 20.Nd3=+) 20.Nd3 Rcb8 The isolani on b4 becomes a target (20...Ra2!?=+) 21.Nf3= Rb6 22.Nfe5 Exerts pressure on the backward pawn 22...Qb7 (22...Bb4?? 23.Nb4 Qb7 24.Nec6+-) 23.Qc2 Be5 (23...Ra3 24.f3=) 24.de5 (24.Ne5 Rc8+=) 24...Nd7= 25.Rb3 (25.g3 Rba6=) 25...c5 (25...Rba6 26.g3=) 26.Nc5 (26.bc5 Rb3 27.c6 Qb5 28.cd7 Rd8= (28...Qd3?? 29.Qc8 Rc8 30.dc8Q; 28...Rd3?? 29.Qc8 Rc8 30.Rc8)) 26...Nc5 27.Qc5?? (better 27.Rc3 Rb4 28.Rc5=) 27...Rc6!!-+ 28.Rbc3 (28.Qc6 Qc6 Combination) 28...Rc5 29.Rc5 h5 30.b5 Ra5 31.h3 (31.g3 Rb5 32.Rc8 Kh7-+) 31...g6 (31...Rb5 32.Rc8 Kh7 33.R8c7-+) 32.Rb1 (32.Rc8 Kg7 33.Rd8 d4 34.Rd4 Qb5-+) 32...Kg7 33.h4 (33.Kh1 Qb8-+) 33...Qb8 34.g3 Qe5 35.Rcc1 (35.Rc2 Ra1 36.Ra1 Qa1 37.Kg2 Qb1-+) 35...Ra2 36.b6 (36.Rf1 g5 37.Rb4-+) 36...Qf5 37.Rf1 Rf2! 38.b7 (38.Rf2 Qb1 Double attack (38...Qb1 Deflection; 38...Qb1 Overloading)) 38...Rf1 (38...Qc2!? 39.Rf2 Qb1 40.Kg2 Qb7 41.Kg1-+) 39.Rf1 Qe5 (39...Qe5 40.Kg2 Qb2 41.Rf2 Qb7-+) 0–1. Carlsen,Magnus (2845) – So,Wesley (2770), FTX Crypto Cup KO, 2021.

5.Qe2 Nbd7 6.Nf3 e6 7.b5 Bd6 8.c4 c6 (8...0-0 9.Nc3=+) 9.Nc3= a6 (9...0-0 10.0-0=) 10.a4 (10.bc6 bc6 11.d4 Qa5=) 10...0-0 11.0-0 e5 12.bc6 bc6 13.Ba3 Ba3 14.Ra3 Qe7 Black intends e4 (14...e4 15.Nd4 dc4 16.f4=) 15.Raa1 Qd6 16.d4 e4 17.Nd2 Qb4 18.Rfc1 Rfb8 19.Rab1 Qa3 20.Ra1 Qb4 21.Rab1 Qa3 22.Ra1 Qb4 ½-½. Welling,G (2285) - Schitco,Ivan (2465), 32nd Staufer-Open, 2020.

5.Qe2 Nbd7 6.f4 e6+= 7.a3 c5 8.bc5 Bc5 9.d4 (9.Nf3!?=) 9...Qb6 (9...Be7 10.Nf3-/+) 10.c4+= Be7 11.c5 Qb3 12.Bc1 (12.Nf3 Rc8-/+) 12...Ne4 (12...Rc8!? 13.Nf3-/+) 13.Nf3 Bf6 (13...0-0 14.0-0-/+) 14.Ne5 (better is 14.Nbd2!? Qa4 15.Ne4 de4 16.Ne5=) 14...Ne5 15.fe5 Bh4 (15...Bg5 16.0-0 0-0 17.Re1-/+) 16.g3 Bg3 17.hg3 Ng3 18.Qh2? (18.Nd2 Qa4 19.Qg2 Nh1 20.Qg7-+) 18...Nh1-+ 19.Qh1 (19.Kd2 b6-+) 19...0-0 (19...Qc2 20.Nd2 Qc3 21.Rb1 Qe3 22.Kf1 Qd4 23.Qg1 Qd3 24.Ke1-+) 20.Qh3 Rae8 (20...b6 21.cb6 ab6 22.Nd2-+) 21.Nd2 Qc3 (21...Qc2 22.e4-/+) 22.Rb1-/+ f6 (22...b6 23.Bb2 Qd3-/+) 23.ef6 (better is 23.Kd1!? b6 24.cb6 ab6 25.Rb6 fe5 26.Rb3-/+) 23...Rf6-+ 24.Kd1 Qd3 (better is 24...Rg6!? 25.Bb2 Qd3-+) 25.Rb3-/+ (25.Rb7 Ref8 26.Ke1 Rf2 27.Rg7 Kg7 28.Qg3 Kh8 29.Qf2 Rf2 30.Kf2 Qc2-+) 25...Qa6 26.e4 (26.Qg3 Rf7+=) 26...de4 (26...Rf2 27.ed5 Qe2 28.Kc2 Qe4 29.Qd3 Qd5 30.Kb1+=) 27.Ne4 Rf1 28.Kc2?? (28.Kd2 Ref8 29.Qd3-/+) 28...Qc4 (better is 28...Qe2 29.Nd2 Qd1 30.Kd3 Rh1-+) 29.Qc3+= Qe2 30.Nd2 Rf7 31.Qd3= Qf2 32.Qe3 Qf6 33.Bb2 Qg6 34.Qe4 Qh5 35.Rb7+= Rb7 36.Qb7 Qf5 37.Ne4 Qd5 38.Qd5+/– ed5 39.Nd6 Re7 40.Bc1 h6 41.Kd3 Kf8 42.Bf4 Re1?? 43.Nf5 Ra1 44.Bd6+- Kf7 45.Be5 Ra3 46.Kc2 h5 47.Kb2?? Ra6= 48.Ng7 h4 49.Nf5 h3 50.Ne3 Ke6 51.Ng4 Kf5 52.Nh2 Rg6+= 53.Ka3 Re6 54.Bc7 Ke4 55.Kb4? Kd4-+ 56.Bd6 Ke4 57.Kb5 d4 58.c6 Re8 59.Ng4? Rh8?? 60.c7= d3 61.Nf2 Ke3 62.Nd3?? Kd3-+ 63.Ka6 Kc4 64.Be5 Re8 65.Bf6 Rc8 66.Be5 Kd5 67.Kb7 Rc7! 68.Bc7 a5! 0–1. Tagirov,Kajum K (1900) – Zagidullin,Valery, Championship Ufa, 2012.

5.Ne2 Nc6 6.b5 Nb8 7.a4 a6 8.0-0 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.d3 e5 12.Nd2 Bd6 13.c4 b6 14.cd5 Nd5 15.Ne4 Be7 (15...N5f6 16.N2g3+=) 16.Qb3 N5f6 17.Ng5 0-0 18.Rc1 h6 19.Ne4 Ne4 20.de4 Nc5 21.Qc4 Qa8 (better 21...Qd6!?=) 22.Be5+/- Rc8 23.f3 Qa2?? (better 23...Qa3 24.Bd4 Bd6+/-) 24.Qa2 1-0. Mettigel (2310) - World_Loser (2050), Rated Blitz game, lichess.org, 2015.

5.Ne2 Nbd7 6.0-0 e6 7.a3 c6 8.d3 Qc7 9.Nd2 Bd6 10.Nf3 0-0-0 11.Ng3 h5 12.c4 h4 13.Ne2 Rdg8 (13...dc4 14.dc4 Ng4 15.h3=) 14.c5 (14.cd5!? ed5 15.b5+=) 14...Be7= 15.h3 (15.Qa4 Kb8=) 15...g5+= 16.Nh2 Ne5 Black plans g4 (16...g4!? 17.hg4 h3-/+) 17.Be5 Qe5 18.Nd4 (better is 18.d4 Qe4 19.Nc3=) 18...Kc7?? (18...g4 19.hg4 h3 20.g3+=) 19.Ndf3 (better is 19.Nhf3 Qd4 20.Nd4+-) 19...Qc3 (19...Qf5 20.Nd4 Qh7 21.Qa4 Qd3 22.Nc6 bc6 23.Qa7 Kd8 24.Nf3+/–) 20.d4 (20.Qb1 Nd7 21.Nd4+/–) 20...g4+= 21.hg4 Ng4 22.Ng4 Rg4 23.Ne5 Rg7 24.Qf3 h3-/+ 25.g3 f5 26.Qe2 Bf6 27.Qd3 Qd3 28.Nd3+= h2 29.Kg2 Kd7 30.Rh1 Rgh7 31.Nf4 Rh6+= 32.Nd3 e5 33.de5+= Bg7 34.f4 Ke6 35.Ne1+- b6 36.Rc1 Kd7 37.Nf3 Bf8 38.cb6 ab6 39.Rh2 Rh2 40.Nh2 Be7 41.Nf3 Ra8? 42.Rc3 c5 43.bc5 bc5 44.Ne1 c4 45.Nc2 Rb8 46.Nd4 Rb2 47.Kf3 Ra2 48.Nf5 Ba3 49.Nd4 Bb4 50.Rc2 Rc2 51.Nc2 Bd2 52.f5 c3 53.g4 Ke7 54.e4 d4 55.Nd4 1–0. Hal1958 – Kendo, playchess.de, 2005.

5.Ne2 Nbd7 6.a3 e6 7.0-0 Bd6 8.h3 c6 9.d3 0-0 10.Nd2 a5 11.c3 Ne5 12.Qc2 Qe7 (12...Qb6 13.Nd4=) 13.f4 (13.c4 dc4 14.dc4 Rfd8=) 13...Ned7 14.d4 White intends f5 (14.e4 de4 15.Ne4 Ne4 16.de4 e5=) 14...b5 15.Ng3 White plans f5 15...Kh8 (15...Ne8 16.Ne2=+) 16.e4 Ng8 17.e5 Bc7 18.f5 (18.Nf3 f6=) 18...Qg5 (better 18...f6!? 19.Nf3 fe5 20.fe6 e4 (20...Qe6?! 21.Ng5 Qg6 22.Rf8 Rf8 23.Qg6 hg6 24.Ne6=) 21.Ne4 de4 22.Qe4 Nb8-/+) 19.Kh2= Rae8 (19...Nh6 20.Nf3 Qe7 21.fe6 fe6 22.a4+=) 20.Nf3 Qd8 21.Bc1 (21.a4 f6 22.ab5 cb5 23.fe6 Re6+=) 21...f6 (21...ef5 22.Re1=+) 22.fe6 Re6 23.ef6? (better 23.ba5 Ba5 24.a4=) 23...Ngf6-+ (23...Rff6?! 24.Qd3 Rg6 25.Ne5 Be5 26.de5 Ne5 27.Qd4-/+; 23...Ndf6?! 24.Ne5 Be5 25.de5 Re5 26.a4-/+; 23...Ref6 24.Ng5 g6 25.Rf6 Ndf6 26.Nf3-/+; 23...Qf6 24.Ng5 Qg6 25.Qg6 Bg3 26.Kg3 Rg6 27.Rf8 Nf8 28.Kh2+- (28.ba5?! Ne6 29.Kh4 Ng5 30.Bg5 h6+-)) 24.Ne5 (24.Bg5 Qb8 25.Bh4 Ne4-+) 24...Ne5 (24...Be5?! 25.de5 Ng4 26.hg4 Qh4 27.Kg1 Qg3 28.Rf8 Nf8 29.Qf2 Qf2 30.Kf2-+) 25.de5 Be5 (25...Re5?! 26.Bf4 Ree8 27.Kg1-+) 26.Bf4? (26.Bg5 Qd6 27.Qd3 Ne4 28.Rf8 Qf8-+) 26...Bf4 (better 26...Ng4! 27.Kh1 Bf4-+) 27.Rf4 Rfe8 (27...Re3 28.Raf1-+) 28.Raf1-/+ a4 29.Qf2 Kg8 30.Nf5 Ne4 (30...Qb8 31.Kg1 Ne4 32.Qe3-/+) 31.Qd4 (better 31.Qa7 Qf6 32.Nh6 gh6 33.Rf6 Nf6 34.g4=) 31...Qf6 32.Qf6 (32.R4f3 h6-/+) 32...Rf6-+ (32...gf6?! 33.Rg4 Kh8 34.Ng7=+) 33.Re1 (33.Nd4 Rf4 (worse 33...Nc3 34.Rf6 gf6 35.Rf6-/+) 34.Rf4 Rc8-+) 33...Nd6 (33...g6!? 34.Nh6 Kg7 35.Rf6 Kf6 36.Re3-+) 34.Re8-/+ Ne8 35.Rf3 Kf7 36.Nd4 Rf3 37.gf3 Nd6 38.Nc6 (38.Kg3 Nc4 39.Nc2 Ke6-+) 38...Nc4 39.Nd4 Na3 40.Kg2 Nc4 (40...Nb1 41.Nb5 a3 42.Na3 Na3 43.Kf2-+) 41.Kf2 (41.Nb5 a3 42.Nd4 Ne3 43.Kf2 a2-+) 41...a3 42.Ke2 a2 43.Nb3 Kf6 44.Kd3 Ke5 45.Na1 Kf4 46.Ke2 (46.Kc2 Kf3 47.Kb3 g5 48.Ka2 Kg3-+) 46...Na3 47.Kd3 (47.Kd2 Kf3 48.Kc1 Nb1-+) 47...Kf3 48.Kd4 Ke2 49.Kd5 (49.Nb3 Kd1 50.Kd3-+) 49...Kd3 50.Kc5 (50.c4 bc4 51.b5 Nb5-+) 50…Kc3 0–1. Sapareva,Magdalena – Georgiev,Nikolay, 186th Open MGU, 2017.

5.Ne2 Nbd7 6.d3 e5 7.a3 Bd6 8.Nd2 (8.0-0 a5 9.b5 0-0=) 8...c6 (8...a5 9.b5=+) 9.c4= 0-0 10.0-0 Qe7 11.c5 Bc7 12.e4 (12.Qc2 Qe6=) 12...Rad8 (12...b6 13.cb6 ab6 14.Ng3=) 13.Ng3 (13.Qa4 a5=) 13...Rfe8 (13...Qe6 14.Qf3=) 14.Qe2 (14.Nf5 Qe6=) 14...Nf8 (14...Qe6 15.Nf5=) 15.Rad1 (15.Nf5 Qe6 16.Qf3 Ng6=) 15...Ng6 16.Nf5 (16.Rfe1 Qe6=) 16...Qd7 (16...Qe6 17.Nf3=) 17.g3 (17.Rfe1 b6=) 17...Ne7 18.Ne3 (18.Ne7 Qe7 19.Qf3 b6=+) 18...Ng6 (18...Qe6 19.Rde1=+) 19.Nf5 a5 (19...Qe6 20.Nf3=+) 20.Nb3 (20.ba5 Ne7 21.Ne3 Qe6=) 20...a4 (20...ab4 21.ab4 Qe6 22.Nd2=+) 21.Na5 (21.Nd2 Ne7 22.Ne7 Qe7 23.ed5 Rd5=) 21...Ba5=+ 22.ba5 Ra8 (22...Qe6 23.Nd6 Rd6 24.cd6 Qd6 25.Qc2+=) 23.Bc3 (23.Nd6 Re7=) 23...d4 24.Bb4 Ne7 25.Nd6 Reb8 (25...Rf8 26.f4=) 26.Nc4 (26.f4 ef4 27.Rf4 Qe6+=) 26...Qc7 The isolani on a5 becomes a target (26...Qe6 27.Nb6 Ra6 28.Na4=) 27.Nb6 Ra6 28.Qc2 (28.Na4 Ng6+=) 28...Nc8 (28...Re8 29.Rb1+=) 29.Na4 (29.f4 Na7+=) 29...Qd7 (29...Ne7 30.Nb6+=) 30.Kg2 (30.Nb6 Qe6+=) 30...h5 (30...Qc7 31.Nb6+=) 31.Nb2 (31.Nb6 Qe6+=) 31...h4 32.h3 (32.f4+=) 32...g5 (32...Ne7!?+=) 33.Qd2+- Nh7 34.gh4 gh4 (34...g4 35.Rg1 Ne7 36.Kf1+-) 35.Nc4 Qe6 (35...f6 36.f4 Qg7 37.Kh1+-) 36.Kh2 (36.f4 f6+-) 36...Ne7 (36...Kf8 37.f4+-) 37.f4 ef4 (37...f6 38.Rg1 Kh8 39.f5+-) 38.Qf4 Rf8 39.Qd6 (39.Qh4!? Ng6 40.Qg3 Re8+-) 39...Ng5 40.Qe6 Ne6 41.Ne5 (41.Nd6!? Ra7+-) 41...f5 (41...Ng6 42.Rg1 Kh7 43.Nf3+-) 42.ef5 Nf5 (42...Rf5 43.Ng6! Rf1 44.Ne7 Kf8 45.Rf1 Ke7 46.Rf5+-) 43.Ng6+- Rf7?? (better 43...Ne3 44.Nf8 Nf1 45.Rf1 Nf8+-) 44.Rf5! 1–0. Barbarickiy,Yuri (1970) – Maraktanov,Andrey (1760), Salekhard Russia, City Championship, 2015.

5.Ne2 Nbd7 6.d4 e6=+ 7.b5 c5 8.c4 (8.0-0 Bd6=+) 8...dc4-/+ 9.0-0 Be7 10.a4 0-0 (10...cd4 11.Qd4 Rc8 12.Nd2-/+) 11.Nd2 cd4 12.Nd4 Rc8 13.Rc1 Nb6 14.a5 c3 15.ab6 cb2 16.Rc8 Qc8 17.ba7 Bc5 18.Qa4 Qa8 19.b6 Bb6 20.Nb5 Nd5 (20...Rc8!?=+) 21.Nc4= Ba7 22.Qa7 (22.Na7? b5 23.Qb5 Rb8 (23...Qa7?! 24.Qb2 Qc7 25.Rc1=) 24.Nb2 Rb5 (24...Qa7?! 25.Qc4=) 25.Nb5 Qb8-+) 22...Qa7 23.Na7 Ra8 (23...Nc3 24.Nb2 Ra8-/+) 24.Nb5+= ½-½. onur604 (2320) - epiphany90 (2520), Casual Rapid game, lichess.org, 2021.

6.a3 e6 7.c4 Nbd7 8.cd5 cd5 9.Nf3 Bd6 10.Nc3 0-0 11.0-0 Rc8 12.Rac1 a6 13.Na4 Qe7 14.d4 a5 (14...Rc1 15.Rc1 Ne4 16.Nc5=) 15.ba5+= Rc1 16.Rc1 Ba3 17.Nc5 Bb2 (17...Bc5 18.dc5 Rc8 19.Qb5=) 18.Qb2+= Nc5 19.Rc5 Ne4 20.Rc1 h6 21.Ne5 Ra8 22.f3 Nd6 23.Qb4 Nf5 24.Qe7 Ne7 25.Rc7 Kf8? (better is 25...Nf5 26.g4 Ne3 27.Nf7 Ra5=) 26.Rb7+- f6 27.Rb8! Rb8 28.Nd7 Ke8 29.Nb8 Kd8 30.Na6 e5 31.de5 fe5 32.Nc5 Nc6 33.Ne6 Ke7+= 34.Ng7 Kf6 35.Ne8 Ke7+= 36.Ng7 Kf6 37.Nh5 Kg5 38.Ng3 Na5 39.Kf2 Nc4 40.Ne2 Kf6 41.h4 Nb6 42.g4 Nd7 43.f4 Nc5 44.Nc3 Ke6 45.f5+- Kd6 46.g5 hg5 47.hg5 d4 48.ed4 ed4+/– 49.Nb5 Ke5 50.g6 ½–½. Koester,Roman (1975) – Nagel,Bernhard (2110), Karl Mala mem op, 2004.

6.a4 Qb6 7.b5 Nbd7 8.Na3 (8.Nf3 e6=) 8...e5=+ 9.Nf3 Bd6 10.0-0 0-0 11.d4 Rfe8 12.c4 ed4 (better is 12...e4!? 13.Nd2 Qc7=+) 13.Bd4+= Be5?? (13...Qc7+=) 14.Qb2 (better is 14.Bb6 Ba1 15.Ra1 ab6 16.cd5 Nd5 17.Qc2+-) 14...Bd4= 15.Nd4 Ne5 16.cd5 cd5 17.Qb3 Rad8 18.Rad1 Ne4 19.Rfe1 (19.Nb1 Nc4=+) 19...Rc8 (19...Ng4 20.f3 Nc5 21.Qc3 Na4 22.Qb4 Ne3 23.Qa4 Nd1 24.Re8 Re8 25.Qd1=+) 20.f3 (20.Rf1!?=) 20...Nc3-/+ 21.Rd2 Qa5 22.Nb1?? (better is 22.Nf5-/+) 22...Nb1-+ (23.Rdd1 Nc3-+) 0–1. Meyer,C – Paust,Wolf Dieter, Bargteheide op, 1988.

6.a4 Nbd7 7.Nf3 e6 8.b5 Bd6=.

6.a4 Nbd7 7.Nf3 e6 8.b5 Be7 9.0-0 Qc7 10.c4 Bd6 11.d4 Ne4 12.c5 Be7 13.Nbd2 Nd2 14.Nd2 0-0 15.e4 Qf4 16.g3 Qf6 17.e5 Qg5 18.f4 Qg6 19.Nb3 Rfc8 0–1. Tasis Montes,C – Javier Conejo,F, III–132, 1990.

6.a4 Nbd7 7.f4 e6 (7...Qc7 8.Nf3=+) 8.b5 c5 (8...Rc8!? 9.Nc3 cb5 10.ab5 Nb6=+) 9.c4 (9.Nf3 Be7=) 9...Nb6 10.d3 (10.cd5 Nbd5 (worse 10...Qd5 11.Bf6 gf6 12.a5+-) 11.Nf3 Nb4=) 10...Be7 (10...a6 11.Nf3=) 11.a5+= Nc8 (11...Nbd7 12.Nf3+=) 12.Nd2 (12.Nf3 a6 13.b6 Nd6+=) 12...0-0 (12...a6 13.b6+=) 13.Ngf3= Nd7 (13...a6 14.b6+=) 14.0-0+= Nd6 15.e4 d4 16.a6 b6 17.Rae1 Rc8 18.Bc1 (18.Ne5 Ne5 19.fe5 Ne8+=) 18...Re8 (18...Qc7 19.Ne5+=) 19.Qf2 (19.Ne5 Qc7+-) 19...Rc7 (19...Qc7 20.Bb2+=) 20.g4 (20.Bb2 Rf8+=) 20...e5 21.fe5 (21.Re2 f6 22.fe5 fe5+=) 21...Ne5= 22.Ne5 Bh4 23.Qf4 Bg5 24.Qf3 Re5 25.Qg2 (25.Qg3 Re6 26.Nf3 Bc1 27.Rc1 f6=) 25...Bd2 (25...Be3 26.Kh1=) 26.Bd2= Re6 (26...Rd7 27.Qg3 Re6 28.g5+=) 27.Bf4 (27.e5 Nc8+=) 27...Rg6 (27...Rd7 28.e5 Nc8 29.Qa8=) 28.Rf3 (28.g5 Re7=) 28...Re7 (28...Rd7 29.Ref1=) 29.Qg3 (29.Ref1 Qd7 30.Rg3 Rge6+=) 29...Ne8 (29...Qd7 30.h3=) 30.h3= h5 (30...Qc8 31.Bd2=) 31.g5 (31.Qh4 hg4 32.hg4 Qd7+-) 31...Nf6 (31...Rge6 32.Ref1=) 32.Kh2+= Nh7 (32...Nd7 33.Ref1+-) 33.Qh4+- f6 (33...Rd7 34.Rg1+-) 34.Qh5 (34.gf6 Nf6 35.Bg3 Rh6+-) 34...Ng5 35.Rg3 Rh6 36.Qg4 Rh7 (36...Qd7!? 37.Qd7 Rd7 38.Bg5 fg5 39.Rg5 Rf7+-) 37.Bg5+- fg5 38.Qg5 Qf8 (38...Rd7 39.Qg6+-) 39.Reg1 (39.Qd5 Qf7 40.Rf3 Qd5 41.cd5+- (41.ed5?? Re1 42.Rg3 Re3-+)) 39...Rf7+- 40.R1g2 Kh8 41.Rg4 (41.Qd5!?+-) 41...Rf3+= 42.R4g3 Rf4 (42...Rf7 43.Qg4 Rf4+-) 43.Qe5+- Rf2? (better 43...Rf1+-) 44.Rf2+- Qf2 45.Rg2 Qf7? (45...Qf8 46.Qf5 Qf5 47.ef5+-) 46.Qg3 (better 46.Qb8 Qg8 47.Qg8 (47.Qa7?! g5 48.Qb6 Qf8=) 47...Kg8 48.Rg6+-) 46...Rh6 (46...Rh5 47.Rf2 Qe7 48.Qb8 Kh7 49.Rf8+-) 47.Rf2+- Rf6? (better 47...Qe7+-) 48.Qh4 Kg8 49.Rf6 gf6 50.Qg4 Kf8?? (50...Kh7 51.Qf5 Kg7 52.Kg3+-) 51.Kg3 (better 51.Qc8 Qe8 52.Qe8 Ke8+-) 51...Qe7?? (51...Ke7 52.Qf4 Ke6 53.Qb8+-) 52.Qf4 (better 52.Qc8 Kf7 53.Qb7 Ke8 54.Qe7 Ke7+-) 52...Qe8?? (52...Kg7 53.Kg4+-) 53.Kf3 (53.Qf6 Kg8 54.e5+-) 53...Qg6?? (better 53...Qh5 54.Kf2 Kg7 55.Qg4 Qg4 56.hg4 Kf7+-) 54.Qg4 1–0. Korolkov,Anatolij (1975) – Smelov,Aleksey (2180), Gagra op, 2008.

6.a4 e6 7.b5 Bd6 8.Nf3 0-0 9.0-0 Nbd7 10.d3 Rc8 (10...Qc7 11.Nc3+=) 11.c4 Ng4 (11...dc4 12.dc4 Qc7 13.Rd1=) 12.g3 Be7 (12...Nc5 13.Nc3=) 13.Nbd2 Bf6 (13...h5 14.h3 Nh6 15.bc6 bc6 16.Rab1+=) 14.Nb3 (14.d4 Be7+=) 14...Bb2= 15.Qb2 Qf6 (15...dc4 16.dc4 Qc7 17.Rfd1=) 16.Qf6 gf6 (16...Ngf6 17.Kg2=) 17.Na5+= Rc7 (17...dc4 18.bc6 bc6 19.Nc4+=) 18.bc6 (18.d4 cb5 19.cd5 b4+/–) 18...bc6 19.Nd4 (19.d4 f5+=) 19...Nge5 (19...Rfc8 20.Ra3+=) 20.Rfd1+= a6 21.f4 Ng4 22.Re1 c5 23.Nf3 Rb8 24.h3 Nh6 25.Rab1 Nf5 26.Kf2 Nd6 27.Rb8+= Nb8 28.Rb1 Nc6 29.Rb6 Na5+= 30.Rd6 Rc6?? 31.Rd8+- Kg7 32.cd5 ed5 33.Rd5 Nb3 34.Ke2 Rc8? 35.Nd2 Nc1 36.Kd1 Na2 37.Ne4 c4 38.Rc5 Rd8 39.d4 Re8 40.Nd6 Re3 41.Nf5 Kg6 42.Ne3 Nc3 43.Kc2 White plans d5 43...Ne4 44.Rc4 Ng3 45.d5 Kg7 46.d6 Kf8 47.Rc8 Kg7 48.d7 (48.d7 Nf1 49.Nf1 f5 50.d8Q h6 51.Qf8 Kg6 52.Rc6 f6 53.Rf6 Kh5 54.Rh6) 1–0. Starr,Albert Martin – Rudyak,Felix (1905), San Francisco Stamer mem, 2005.

6.c4 e6 7.a3 dc4 8.Qc4 Qd5 9.Qd5 cd5 10.Nc3 (10.Nf3 a5=) 10...a6 (10...a5 11.Nb5 Kd7 12.Nf3=+) 11.Na4 (11.Rc1 Nc6=) 11...Nbd7 12.Rc1 Bd6 (12...a5 13.b5=) 13.Nf3 (13.Nc5 Bc5 14.bc5 e5=) 13...0-0 (13...Ke7 14.Nc5 b6 15.Nd7 Nd7 16.Ke2=) 14.Nc5 (14.Bf6 Nf6 15.Nb6 Rae8=) 14...Rab8 (14...Rfb8 15.Ke2=) 15.d4 (15.Ke2 e5=) 15...Rfc8 16.Ke2 (16.0-0 Nb6=) 16...Nb6 17.Nd2 Rc6 (17...Kh8 18.Kf3=) 18.f3 Nfd7 (18...Rcc8 19.e4 Bf4 20.e5=) 19.Ndb3 (19.e4 Nf8+=) 19...Bc5 (19...Nf8 20.Na5 Rc7 21.e4=) 20.dc5 Nc4 21.Rc2 Rbc8 (21...Rcc8 22.Rd1=) 22.Rd1 (22.e4 Nb2 23.Rb2 Ne5+=) 22...b6= 23.e4 bc5 24.ed5 ed5 25.Rd5 Re6 (25...Re8 26.Kf2 Ne3 27.Rd7 Nc2 28.Nc5=) 26.Kf2+= Ne3 (26...Ncb6 27.Rdd2 c4+-) 27.Rd7+- Nc2 28.Nc5 (28.bc5?! Ne3=) 28...Ree8 29.Na6 Ne3 (29...Red8!? 30.Rd8 Rd8=) 30.Nc5+- Nc4 (30...Ng2 31.Bg7 Kg7 32.Kg2 Re2 33.Kg3+=) 31.Bc1 Ne5 (31...Rcd8 32.Rd8 Rd8 33.Ke2+-) 32.Rd5 (32.Rd4 Nc6 33.Rd6 Kf8+-) 32...Rcd8+- 33.Rd8 Rd8 34.Ke2 (34.Be3 Rd1 35.a4 Nc4+-) 34...Nc6 (34...Re8 35.Kd1+-) 35.Bb2 f6 36.Bc3 Ne7 (36...Nd4 37.Bd4 Rd4 38.h3+-) 37.a4+- Nd5 38.Bd2 Rb8 (38...Re8 39.Kf2+-) 39.b5 Rc8 (39...Re8 40.Kd3+-) 40.Ne4 Re8 41.Kd3 (41.g4 g6 42.Kd3 Rd8+-) 41...Rd8 42.Kc2 f5 43.Nc3 Nb6 (43...Nb4 44.Kd1+-) 44.Bg5 (44.a5 Nc4 45.Bg5 Ra8+-) 44...Rc8 45.Kb3 (45.a5 Nd5 46.Bd2 Kf7+-) 45...h6 46.Bh4 (46.Bf4 g5 47.Be3 Nc4+-) 46...Nc4+- 47.Be1 (47.Nd5 Nd2 48.Ka3 Rc5+-) 47...Kf7 (47...Ne3+-) 48.Kb4 (48.Nd5 Ke6 49.Nf4 Ke5+-) 48...Nb2 (48...Ne3 49.Bf2 Ng2+=) 49.Kb3 Nc4 50.Ne2 (50.Nd5 Ke6 51.Nf4 Kd7+-) 50...Ne5 (50...Ne3 51.g3+-) 51.b6 (51.Nd4 f4+-) 51...Nd3 (51...Re8!? 52.Nd4 Nd7 53.Bf2 Nb6 54.Nf5+-) 52.Bb4 Ke6 (52...Rd8 53.a5 Nb4 54.Kb4+-) 53.a5 (53.Nd4 Kd7+-) 53...Kd5 54.b7 Rb8 (54...Rd8 55.a6 Kc6 56.Be7+-) 55.a6 1–0. Fekete,Albert (2345) – Samu,Gabor (2095), HUN–chT2 Toth, 2006.

6.c4 e6 7.a3 dc4 8.Qc4 Qd5 9.Qd5 Nd5 10.Nc3 Nd7 11.Nf3 Bd6 12.g3 0-0 13.e4 N5b6 14.d3 Rfd8 15.Ke2 Ne5 16.Ne1 Rd7 17.f4 Ng6 18.Ng2 f5 19.e5 Bc7 20.Ne3 Rad8 21.Rhd1 Ne7 22.Rac1 a6 23.Nc2 (23.Nc4 Nbd5=) 23...Ned5 24.Nd5 Nd5 (worse is 24...ed5 25.Bd4+/–; worse is 24...cd5 25.Bd4+=) 25.Nd4 Re8 26.Nb3 Bb6 27.d4 Kf7 28.Nd2 Rg8 29.Nc4 Bc7 30.Kf3 Ke8 31.Rc2 g5 32.Bc1 (32.fg5 Rg5 33.Bc1 Rg4=) 32...g4 33.Ke2 h5 34.Be3 Ne3 (34...h4 35.Kd3+= (worse is 35.gh4 Rh8-+)) 35.Ne3 Rh7 36.Nf1 h4 37.Kf2 (37.Ne3 Kd7+=) 37...Rgh8 38.Rdd2 Bb6 39.Rc4 Kd7 40.Kg2 Kc8 (40...hg3 41.hg3 Ke7 42.Kf2-/+) 41.Kf2 Kb8 42.Ke3 hg3 43.hg3 Rh1 44.Rf2? (better is 44.Rc1!?-/+) 44...Rg1-+ 45.Ke2 Rh3 46.a4 Rh8 (46...a5 47.b5-+) 47.Ke3 (47.a5 Bd8-/+) 47...Rgh1 (47...a5 48.ba5 Ba5 49.Ke2-+) 48.Rcc2 (48.Rc1 Ka7-/+) 48...Rd8 49.Rcd2 (49.Rc4 a5-/+) 49...Rg1 (49...a5!? 50.ba5 Ba5-+) 50.Rd1 c5 (better is 50...Rh8!?-/+) 51.bc5= Bc5 52.Rfd2 Ba7 53.Kf2 Rh1 54.Ke3 (54.Kg2 Rdh8=) 54...Rd5 55.Kf2 (55.Rd3 Ra5 56.Ra1 Rh7+=) 55...Rh3 (better is 55...Rh8!?-/+) 56.Kg2= Rh7 57.Ne3 Rd8 58.Rd3 (58.Nc4 Rdh8 59.Kf2 Rh2 60.Ke3 Rd2 61.Rd2 Kc7=) 58...Rhd7+= 59.Nc2 Rc7 60.Ne3 Rdc8 (60...Rh8 61.Nf1+=) 61.Kf1 (61.d5 Be3 62.Re3 Rc2 63.Kg1 ed5 64.Rd5 Rh8=) 61...Rc3 (61...Rh7!?+=) 62.Ke2= Rd3 63.Kd3 Rd8 64.d5 Be3 (better is 64...b5!? 65.ab5 ab5+=) 65.Ke3+/– ed5 (65...Kc7 66.d6 Kd7 67.Rb1+-) 66.Kd4 Kc7 67.Rh1 b5 68.a5 b4 69.Rb1 (69.Rh7!? Kc6 70.Ra7+/–) 69...Rb8= 70.Kd5 Kd7 71.Kc4 Rc8 72.Kd4 Rc3 73.Rb4 Rg3 74.Rb7 Ke6 75.Rb6 Ke7 76.Rf6 Ra3 77.Rf5 Ra5 78.Rg5 Ra4 79.Ke3 Ra3 (79...g3!?=) 80.Ke4+/– g3 81.f5 (81.Rg7 Kf8 82.Rg6 Ke7+/–) 81...Ra4+= 82.Kf3 Ra3 83.Kf4 a5?? (better is 83...Ra4 84.Kg3 Re4+=) 84.Rg7+- Kf8 85.f6 Ra4 (85...Ra1 86.e6 Re1 87.e7 Ke8 88.Rg8 Kf7 89.Rf8 Kg6 90.Kg3 a4+-) 86.Kf5 Rb4 87.Rg3 (87.e6 Rb5 88.Kg6 Rb4 89.e7 Ke8 90.Rg8 Kd7 91.e8Q Kd6 92.f7 Rf4 93.Qb8 Kd5 94.Qf4 g2 95.Qg5 Kd4 96.Qd2 Kc4 97.Rc8 Kb3 98.Qc2 Kb4 99.f8Q Kb5 100.Qc6) 87...a4 88.Ra3 (88.Rh3 Kg8 89.e6 Rb2 90.Rg3 Kf8 91.e7 Ke8 92.Rg8 Kd7 93.e8Q Kc7 94.Qe5 Kb6 95.Qb2 Kc7 96.Qb8 Kc6 97.Rc8 Kd5 98.Qe5) 88...Kf7 (88...Ke8 89.Rh3 Rb5+-) 89.e6 Kf8 (89...Ke8 90.Rh3 Kd8 91.e7 Kc7 92.e8Q Kb6 93.f7 Rb5 94.Kg6 Rb1 95.f8Q Rg1 96.Kh6 Rb1 97.Qd6 Ka5 98.Rh5 Rb5 99.Rb5) 90.Rc3 Rb8 (90...Kg8 91.f7 Kh7 92.f8Q Rf4 93.Kf4 Kg6 94.Rh3 a3 95.Qf7) 91.Rh3 (91.Kg6 Ke8 92.Rc7 Kf8 93.e7 Kg8 94.f7 Kh8 95.f8Q Rf8 96.ef8Q) 91...Kg8 92.Kg6 1–0. Mehlhorn,Uwe (2120) – Green,Per (1995), Gibraltar Masters, 2015.

6.Nf3 Qb6 7.a3 a5 Black threatens to win material: a5xb4 8.Bd4 Qa6 (8...Qc7 9.Be5 Qc8 10.ba5 Ra5 11.c4=) 9.d3 Covers e4 (9.b5 cb5 10.Nc3 Nbd7=) 9...Nbd7 10.0-0 e6 11.Nbd2 Be7 (11...ab4?? the pawn must be left alone, otherwise Black will be punished 12.ab4 Qa1 13.Ra1 Ra1 14.Ba1 Bb4 15.Qd1+-) 12.Rab1 (12.h3 b5= (12...ab4?? taking the pawn will cause Black grave problems 13.ab4 Qa1 14.Ba1+-)) 12...0-0 13.c4 b5 14.c5 White gains space 14...Qb7 15.e4 ab4 16.ab4 Ra2 17.Bb2 Rfa8 18.e5 White threatens to win material: e5xf6 18...Ne8 19.Qe3 R8a4 Black threatens to win material: Ra4xb4. Praise the rook! 20.Bc3 Nf8 (20...Nc7 21.Nb3=) 21.Nd4 The knight likes it on d4 21...Qc8 22.f4 f6 23.ef6 gf6 24.Qg3 Ng7= 25.Rbe1 Kf7? 26.Re3 Bc5 27.bc5 b4 28.Bb4 Rb4= 29.N2b3 Raa4+= 30.Qg4? Rd4-+ 31.Nd4 Rd4 32.Rg3 Ng6 33.h4? Nf5 34.Rh3 Qg8 35.Ra1 Rf4 36.Ra7 Nfe7 37.Qh5 Rf5 38.Qd1 Nf4 39.Rh2 Qg3 40.Ra3 Qe3 (40...Qe3 41.Kh1 h5-+) 0–1. Sirokmany,Gabor (2155) – Horvath,Mario (2300), HUN–chT2 Breyer, 2002.

6.Nf3 Nbd7 7.0-0 Qc7 A) 8.Bf6 Nf6 9.d4 e6 10.a3 Bd6 11.c4 dc4 12.Qc4 g5 13.Qc3 g4-/+; B) 8.Nc3 e6 (8...e5 9.a3 Bd6 10.e4 d4 11.Nd1 a5 12.c3 ab4 13.ab4 Ra1=; 8...Qd6 9.b5 e5 10.a4 e4 11.bc6 bc6 12.Nd4 Qc7 13.Rab1 Bd6=; 8...a5 9.ba5 e5 10.e4 d4 11.Nb1 Ra5 12.c3 Qb6 13.Bc1 Qa6=+) 9.b5 Bd6 10.Rab1 0-0 11.bc6 bc6 12.e4 Rab8 13.Rfe1 e5=+; C) 8.a3 a5 (8...e5 9.Nc3 Bd6 10.e4 d4 11.Nb1 Nh5 12.g3 Nhf6 13.c3 dc3=) 9.Bf6 Nf6 10.Nc3 e5 11.e4 d4 12.Na2 Bd6 13.c4 dc3=; D) 8.c4 e5 9.cd5 Nd5 10.a3 e4 11.Ng5 N7f6 12.Bf6 Nf6 13.Nc3 Bd6=.

6.Nf3 Nbd7 7.0-0 e6 8.b5 (8.a3 Bd6 (8...a5 9.b5 Bd6 10.c4 0-0 11.d4 dc4 12.bc6 bc6 13.Nbd2 Nb6=; 8...Be7 9.Nc3 e5 10.e4 d4 11.Nd1 a5 12.c3 dc3 13.dc3 0-0=; 8...c5 9.bc5 Bc5 10.Nc3 Rc8 11.e4 0-0 12.ed5 ed5 13.Qd3 Qa5=; 8...b5 9.Bc3 a5 10.ba5 Bd6 11.Bb4 Bc7 12.Nc3 Ba5 13.Nd4 Qc7=) 9.Nc3 Qc7 10.e4 0-0 11.Rfe1 Ne5 12.ed5 Nf3 13.Qf3 ed5=) 8...c5 (8...Bd6 9.a4 (9.Nc3= Qc7 10.bc6 bc6 11.Rab1 0-0 12.e4 Rab8 13.Rfe1 e5=+) 9...0-0 10.Nc3 Qc7 11.Rfb1 e5 12.Ba3 Ba3 13.Ra3 Rfe8=; 8...cb5 9.Qb5 a6 10.Qe2 Bd6 11.Ba3 Ba3 12.Na3 b5 13.Nb1 0-0=+; 8...Be7 9.Nc3 0-0 10.Rfb1 e5 11.bc6 bc6 12.e4 d4 13.Nd1 Bd6=; 8...Qb6 9.Nc3 Bb4 10.bc6 Qc6 11.a3 Bc3 12.Bc3 0-0 13.Rfb1 Ne4=; 8...Rc8 9.a4 Bd6 10.Nc3 0-0 11.Rfb1 Qc7 12.bc6 bc6 13.Ba3 Rb8=) 9.a4 (9.d3 a6 10.a4 Be7 11.c4 0-0 12.Nc3 Qa5 13.cd5 ed5=) 9...Bd6 10.d3 (10.a5 a6 11.Nc3 0-0 12.e4 d4 13.e5 dc3=) 10...Qc7 (10...0-0 11.a5 Qc7 12.Nbd2 Ng4 13.h3 Nh2=) 11.Nbd2 (11.a5 0-0 12.Nbd2 Ng4 13.h3 Nh2=) 11...0-0 12.e4 (12.a5 Rfd8 13.c4 Ng4=) 12...de4 (12...Ng4 13.h3 Nge5 14.Ne5 Be5 15.Be5 Qe5 16.a5=) 13.de4 (13.Ne4 Ne4 14.Qe4 Rfd8+=) 13...Ne5 (13...Ng4=) 14.g3 (14.a5 Rfd8+=) 14...Rfd8 (14...Nf3 15.Qf3 Be5 16.Be5 Qe5 17.Rad1=) 15.Nc4 Nc4 16.Qc4 (16.Bf6 gf6 17.Qc4 Be5=) 16...Nd7 17.Qc3 Bf8 18.Nd2 (18.a5 c4=) 18...Nf6 19.Rfe1 (19.Qe3 Ng4 20.Qe2 Ne5=) 19...c4 (19...Be7 20.Nf3=) 20.Kg2 (20.Qc4 Bc5 21.Qe2 Bd4+=) 20...Rac8 21.Nf1 (21.Rad1 Rd7=+) 21...a5=+ 22.ba6 (22.Qf3 e5=+) 22...ba6-/+ 23.a5 (23.Qf3!? c3 24.Bc1-/+) 23...Qb7-+ 24.Ba3 Ne4 25.Qf3 Ba3 26.Ra3 f5 27.g4 (27.Qe3 Nc5 28.f3 Qb5-/+) 27...Qf7 (27...Rd5 28.Re4 fe4 29.Qe4-+) 28.Re4 (better 28.gf5!? ef5 29.Ng3 Ng3 30.fg3 Rd2 31.Re2 Re2 32.Qe2-/+) 28...fe4-+ 29.Qe4 c3 30.Ra4 Rd5 31.Rc4 Rf8 32.f3 Qf6 33.Rc3 Ra5 (33...Qc3?! 34.Qe6 Kh8 35.Qd5 Qc2 36.Nd2-+) 34.Re3 Rc5 35.Qa4 (35.Qe6 Qe6 36.Re6 Rc2 37.Kg3 a5-+) 35...a5 36.Ng3 Qf4 37.Qb3 (37.Qf4 Rf4 38.c3 a4-+) 37...Rc2! 38.Kh3 (38.Qc2 Qe3) 38...Qc4 (better 38...Qh6 39.Nh5 Rc6 40.Kg2-+) 39.Qb7 (39.Qc4 Rc4 40.Kg2-+) 39...Qa2 40.Nf1 Rf2 (40...Rf2 41.Qa6 e5-+) 0–1. Barlag,Christoph (2135) – Svetushkin,Dmitry (2550), 10th Schloss Open, Werther GER (1), 2004.

6.Nf3 Nbd7 7.a3 A) 7...e6 A1) 8.Nc3 a5 (8...Nb6 9.0-0 Nc4 10.Rfb1 Bd6 11.e4 Nb2 12.Rb2 de4 13.Ne4 Ne4=; 8...e5 9.0-0 Bd6 10.e4 d4 11.Nd1 Nh5 12.g3 Nhf6 13.c3 dc3=; 8...Be7 9.0-0 e5 10.e4 d4 11.Na2 c5 12.c3 0-0 13.bc5 Nc5=; 8...Bd6 9.e4 Qb8 10.ed5 cd5 11.0-0 Ne5 12.Ne5 Be5 13.h3 0-0=) 9.b5 Bd6 10.0-0 0-0 11.Rab1 Qe7 12.a4 e5 13.Rfe1 Ne4=; A2) 8.Ra2 a5 (8...Bd6 9.0-0 0-0 10.c4 dc4 11.e4 Be7 12.Qc4 a5 13.ba5 Qa5=+; 8...Qc7 9.Bf6 Nf6 10.0-0 Bd6 11.c4 dc4 12.Qc4 0-0 13.d4 a5=; 8...Be7 9.0-0 0-0 10.Nc3 e5 11.e4 d4 12.Nb1 a5 13.b5 cb5=+; 8...Qb6 9.0-0 a5 10.Nc3 ab4 11.ab4 Ra2 12.Na2 Bd6 13.d3 0-0=) 9.b5 Bd6 10.0-0 0-0 11.Nc3 Qc7 12.d3 e5 13.Rd1 Rfd8=+; A3) 8.0-0 a5 (8...Bd6 9.Nc3 Qc7 10.e4 0-0 11.Rfe1 Ne5 12.ed5 Nf3 13.Qf3 ed5=; 8...Be7 9.Nc3 e5 10.e4 d4 11.Nd1 a5 12.c3 dc3 13.dc3 0-0=; 8...c5 9.bc5 Bc5 10.Nc3 Rc8 11.e4 0-0 12.ed5 ed5 13.Qd3 Qa5=; 8...Qc7 9.c4 dc4 10.Qc4 Bd6 11.d3 0-0 12.Nc3 a5 13.Rfc1 ab4=) 9.b5 Bd6 10.Nc3 0-0 11.Rfb1 e5 12.bc6 bc6 13.e4 Re8=; A4) 8.c4 dc4 (8...a5 9.b5 cb5 10.cd5 Nd5 11.Qb5 Qb6 12.Qb6 N7b6 13.d3 Rc8=; 8...Be7 9.0-0 0-0 10.cd5 ed5 11.Nc3 Re8 12.d3 a5 13.b5 Bd6=; 8...c5 9.cd5 Nd5 10.bc5 Bc5 11.0-0 0-0 12.d3 Rc8 13.Nc3 Nc3=) 9.Qc4 a5 10.b5 Rc8 11.Bc3 Bd6 12.0-0 cb5 13.Qb5 b6=; B) 7...Qc7 B1) 8.c4 a5 (8...dc4 9.Bf6 ef6 10.Qc4 a5 11.Qe4 Be7 12.b5 Rd8 13.bc6 Qc6=; 8...e5 9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 Bd6 12.e4 0-0 13.0-0 Rad8=) 9.cd5 Nd5 10.b5 e5 11.bc6 bc6 12.d4 e4 13.Ng5 f5=; B2) 8.0-0 a5 (8...e5 9.Nc3 Bd6 10.e4 d4 11.Nd1 a5 12.c3 ab4 13.ab4 Ra1=) 9.Nc3 e5 10.e4 d4 11.Na2 Nh5 12.Qd1 Nf4 13.d3 Qd6=; B3) 8.Nc3 a5 (8...e5 9.0-0 Bd6 10.e4 d4 11.Na2 0-0 12.c3 dc3 13.Nc3 Rfd8=) 9.0-0 e5 10.e4 d4 11.Na2 Nh5 12.Qd1 Nf4 13.d3 Bd6=+; B4) 8.Bf6 Nf6 9.d4 e6 10.Nbd2 Rd8 11.c4 dc4 12.Nc4 Bd6 13.0-0 0-0=; C) 7...a5 C1) 8.0-0 b5 (8...e6 9.b5 Bd6 10.Nc3 Qc7 11.bc6 bc6 12.Rab1 0-0 13.Kh1 Rab8=+; 8...ab4 9.ab4 Ra1 10.Ba1 e6 11.b5 Bd6 12.Nc3 Qc7 13.Bb2 e5=; 8...Qc7 9.Bf6 Nf6 10.Nc3 e5 11.e4 d4 12.Na2 Bd6 13.c4 c5=) 9.ba5 Qa5 10.Bf6 Nf6 11.Nc3 e6 12.Nd4 Qa6 13.f4 Bc5=+; C2) 8.b5 e6 (8...Qc7 9.Bf6 Nf6 10.d4 c5 11.0-0 cd4 12.ed4 Rc8 13.Rc1 Qc4=; 8...Qb6 9.Bd4 Qc7 10.Bf6 Nf6 11.d4 c5 12.0-0 Rc8 13.Rc1 cd4=; 8...Rc8 9.0-0 e6 10.Bc3 Bd6 11.Ra2 0-0 12.bc6 bc6 13.Qa6 Bc7=+) 9.Nc3 Bd6 10.0-0 0-0 11.Rab1 Qc7 12.h3 e5 13.Rfd1 Rfe8=+; C3) 8.ba5 e6 (8...Ra5 9.0-0 e6 10.Nc3 e5 11.e4 d4 12.Nd1 Bc5 13.c3 0-0=+; 8...Qa5 9.0-0 e6 10.d3 b5 11.c4 bc4 12.dc4 Bd6 13.Nbd2 e5=; 8...Qc7 9.Bc3 e5 10.d3 Bd6 11.e4 0-0 12.0-0 de4 13.de4 Nc5=) 9.Bc3 Ne4 10.Bb4 c5 11.Bc3 Bd6 12.Ra2 0-0 13.0-0 Qc7=+; C4) 8.Bf6 Nf6 9.b5 e6 10.bc6 bc6 11.d4 c5 12.Qb5 Nd7 13.Nbd2 cd4=.

6.Bf6 ef6 7.a3 Bd6 8.Nf3 a5 9.b5 Nd7 (9...Qb6 10.bc6 Qb2 11.cb7-+) 10.d4 (10.0-0 0-0=) 10...Qc7 (10...Rc8 11.bc6 Rc6 12.0-0=) 11.0-0 0-0 12.c4 dc4 13.Qc4 Nb6 14.Qe2 cb5 15.Qb5 Rfc8 16.Nbd2 Qc6 (16...a4 17.Rfd1+=) 17.Rfb1 Ra6 18.g3 (18.e4 Qc3+=) 18...Qc2 (18...Qb5 19.Rb5 Rc2 20.Rab1+=) 19.Rb2 (19.e4 a4+=) 19...Qc6 (19...Qg6 20.e4=) 20.Qc6+/– Rc6 21.a4 (21.e4 a4+/–) 21...Bb4 22.Raa2 Rc1 23.Kg2 Ra8 (better is 23...Bc3 24.Rb1 Rb1 25.Nb1 Bb4+/–) 24.Rc2 (better is 24.Nb3 Rd1 25.e4+=) 24...Rc2=+ 25.Rc2 Na4 26.Rc7 b5 27.Rb7 Nc3-/+ 28.e4 a4 29.d5 a3-+ 30.Nd4 a2 31.N2b3 Ne4 32.Rb5 Bf8 33.Nc6 Nc3 34.Rb7 Nd5 35.Na7 Nb4 36.Kf3 Nc2 (37.Nc6 Ra3-+) 0–1. Rush,Bradley – Genge,Peter, corr IECG Cat–C, 1995.

6.Bf6 ef6 7.e4 Bb4 8.ed5 Be7 9.dc6 Nc6=+.

7.a3 Bd6 8.0-0 Nbd7 9.d3 e5 10.Nbd2 0-0 11.Rfe1 Re8 Black intends e4 12.Qd1 a5 13.ba5 Qa5 14.c4 e4 15.Nb3 (15.de4!? de4 16.Bf6 ef3 17.Nf3 Bh2 18.Kh2 Nf6 19.Qb3=+) 15...Qc7-/+ 16.de4 de4 (16...Re4?! 17.Nbd2=) 17.Nfd2 (17.c5 Nc5 (17...ef3?! 18.cd6 Qb6 19.Bf6 Nf6 20.gf3=; worse 17...Bc5 18.Nc5 Nc5 19.Bf6=+) 18.Nc5 ef3 19.Bf6 gf6 (19...Bh2?! 20.Kf1=+) 20.Nb7 Bh2 21.Kh1 Be5-/+ (21...Qb7?! 22.Kh2 fg2 23.Qf3=+)) 17...Bh2-+ 18.Kf1 Be5 19.Nd4 (19.Be5 Ne5 20.Qb1 Neg4-+) 19...Nc5 20.Qc2 Nd3 21.Ne4 Bd4 (better 21...Ne1!? 22.Re1 Ne4 23.Qe4-+) 22.Nf6?? (22.Bd4 Ne4 23.Qd3-+) 22…Bf6 (22...Bf6 23.Qd3 Bb2-+; 22...gf6?! 23.Bd4 Ne1 24.Ke1-/+) 0-1. Zampier,Alexandre - Morgado,Leandro Batista (1885), 6th Floripa Open, 2020.

7.a3 Bd6 8.Nc3 Nbd7 9.e4 Ne4 10.Ne4 de4 11.Qe4 Qe7 12.Qg4 (< 12.Bg7 f5 13.Qe3 Qg7 14.Qe6 Qe7-/+) 12...0-0-0 13.0-0 (< 13.Bg7 Rhg8 14.Qd4 e5 15.Qa7 Rg7-+) 13...Rdg8 14.Rfe1 (14.Bg7? f5 15.Qd4 Qg7 (15...Rg7?! 16.Qa7 Rhg8 17.g3-+) 16.Qg7 Rg7-+) 14...h6 15.Qe4 (15.Bg7? Rh7-+) 15...Nf6 16.Qe3 Kb8 17.Bd4 a6 18.c4 h5 19.h3 Rh6 20.Bc5 g5 21.Bd6 (White gets kings attack) 21...Qd6 22.Ne5 Rg7 23.a4 Ng8 (23...Qb4?? 24.Nc6! bc6 25.Reb1+-) 24.Nd7 Kc8 25.Nb6 Kb8 26.b5 g4 27.c5 Qc7 28.Nd7! Ka8 (28...Qd7 29.Qe5) 29.Qc3 Rg5 30.h4 Rf5 31.Qg7 Qd8 32.bc6 bc6 33.Rab1 Rg6 (33...Rhf6 34.Rb8 Qb8 35.Nb8 Rd5 36.Qf8 Rd8 37.Qd8 Ka7 38.Nc6 Kb7 39.Rb1 Kc6 40.Qd6) 34.Qb2 (34...Qc7 35.Qb8 Qb8 36.Rb8 Ka7 37.Reb1 a5 38.R1b7 Ka6 39.Rc7 Rf2 40.Rb6) 1–0. Trokenheim,Marek – Fricot, email CTON Cup, 1997.

7.a3 Nbd7 8.0-0 Bd6 9.c4 (9.Nc3 0-0=) 9...0-0 (9...dc4 10.Qc4 a5 11.Nc3=) 10.c5 Bc7 11.d3 Re8 12.Nbd2 a5 (12...e5 13.e4=) 13.Nb3 (13.e4 ab4 14.ab4 b6=) 13...Qe7 14.e4 e5 15.Bc3 (15.Rfe1 ab4 16.ab4 b5=) 15...a4 Black gets strong initiative 16.Nc1 (16.Nbd2 b6=) 16...b5 17.ed5 (17.cb6 Bb6 18.Re1 Ng4=) 17...Nd5=+ 18.Bd2 Rad8 19.Qe4 (19.Bg5 f6 20.Be3 e4 21.de4 Qe4-/+) 19...N7f6-/+ 20.Qf5 Qd7 21.Qd7 Rd7 22.Re1 h6 23.g3 (23.Be3 Ne3 24.fe3 e4 25.de4 Re4-/+) 23...Kf8 24.Na2 Nh7 (24...Ree7 25.Rad1-/+) 25.Nc3 (25.Re4!?=+) 25...Nc3 26.Bc3 Rd3 (better 26...Rd5=+) 27.Re3 (better 27.Ne5 Be5 28.Be5=) 27...Re3 (27...e4 28.Nd4 Be5 29.Ne2-+) 28.fe3-/+ f6 (28...e4 29.Nd4 Be5 30.Rd1-/+) 29.h4 (29.Rd1 e4 30.Nd4 Be5-/+) 29...g5 (29...e4!? 30.Nd4 Bg3 31.Nc6 Bh4 32.Rc1-+) 30.Rd1-/+ Rd8 (30...g4 31.Rd7 Re7 32.Re7 Ke7 33.Nd2-+) 31.Rd8=+ Bd8 32.Kf2 (32.e4 g4 33.Nd2 Ke7-/+) 32...Ke7 (32...g4 33.Nh2 h5 34.e4-/+) 33.Nd2 (33.e4 g4 34.Nd2 Bc7-/+) 33...Ke6 (33...gh4 34.gh4 Bc7=+) 34.Ne4 (34.hg5 Ng5 35.e4 f5-/+) 34...Be7 (34...gh4 35.gh4 f5 36.Nd6 Bh4 37.Ke2-+) 35.Kf3? (better 35.hg5!? Ng5 36.Ng5 hg5 37.e4-+) 35...f5-+ 36.Nd2 (36.Nf2 gh4 37.g4 Ng5 38.Kg2 f4 39.ef4 ef4-+) 36...gh4 37.Kg2 (37.gh4 Bh4 38.Ke2 Ng5-+) 37...hg3 38.Kg3 Bg5 (38...Ng5 39.Kf2-+) 39.e4 (39.Kf3 Nf6 40.Bb2 Nd5-+) 39...fe4 40.Ne4 (40.Kg2 Nf6-+) 40…Bc1 (40...Bc1 41.Nd6 Nf6-+) 0–1. Devis – Van Dosselaer, Beveren, 1995.

7.a3 Nbd7 8.d3 Be7 9.Nbd2 0-0 10.0-0 a5 11.c3 b5 (11...Bd6 12.e4 e5 13.Nb3=) 12.h3 (12.Nb3 ab4 13.cb4 Qc7=) 12...Nb6 (12...Qc7 13.Nb3=+) 13.Ne5 (13.Nb3 a4 14.Na5 Qe8=) 13...Qc7=+ 14.f4 Na4 (14...Nbd7 15.Ng4=+) 15.Nb3 ab4 16.cb4 Nd7 (16...Nb2 17.Qb2 Nd7 18.Nd7 Qd7 19.Rfc1=) 17.Rfc1 (17.Rac1 Ra6 18.Bd4 Ne5 19.Be5 Bd6=) 17...Nb2 (17...Ra6 18.Nd7 Qd7 19.Bd4=) 18.Qb2 (18.Nc6!? Nb6 19.Qb2+-) 18...Bf6 (18...Ne5 19.Qe5 Qe5 20.fe5=) 19.d4 Be5 20.fe5 Nb6 21.Nd2 (21.Na5 Qd7=) 21...Ra4 22.Nb1 (better 22.Qc3!?=) 22...Nc4-/+ 23.Qb3 (23.Qc3 Rfa8-/+) 23...Rfa8 (23...Qe7 24.Ra2-/+) 24.Rc2 (24.Rf1 Qe7 25.Ra2 Qh4-/+) 24...Qe7 25.Rc4 (better 25.Raa2!?-/+) 25...bc4-+ 26.Qc3 Qa7 (26...Rb8 27.Qc1-+) 27.Ra2 h6 (27...Qb7 28.Rf2-+) 28.g3 (28.e4 Qe7 29.Rf2 Qg5-+) 28...Qe7 29.Rf2 Qg5 30.Kg2 Qg6 31.Qe1 (31.Qc2 Qc2 32.Rc2 f6-+) 31...Qe4 32.Kh2 (32.Rf3 Ra3 33.Na3 Ra3-+) 32...Ra3 33.Na3 Ra3 34.Re2 Rb3 35.Qa1 (35.Qf2-+) 35...Rb1 36.Qa8 Kh7 37.Rg2 Qe3 38.Qc6 0–1. Gutierrez Lazaro,Josep (1920) – Triadu Cassa,Jordi (2265), Barcelona ESP, 1st Tona Open, 2011.

7.b5 Qb6 8.a4 a6 9.Nc3 ab5 10.ab5 Ra1 11.Ba1 c5 12.0-0 Be7 13.Rb1 Nbd7 14.Nd1 0-0 15.c4 Qc7 16.d3 Ra8 17.h3 Nb6 18.Ne5? (18.Be5 Bd6 19.Bf6 gf6=) 18...Nfd7?? (better is 18...Ra1 19.Ra1 Qe5-+) 19.Nd7+= Qd7 20.Qg4 Bf8 21.Nc3 f5 (21...dc4!? 22.dc4 Qd3-+) 22.Qe2+= g6 23.Nd1 dc4 24.dc4 Bg7 (24...Ra4!?-/+) 25.Bg7= Qg7 26.Kh2 Ra3 27.Rc1 Qd7 28.Rc2 Qd6 29.g3 Qd3 30.Qd3 Rd3 31.Nb2 Ra3 32.Rd2 Ra2 33.Kg2 Kf7 34.Rd6 Nc8 (worse is 34...Rb2 35.Rb6 Rb4 36.Rb7 Kf6 37.Rh7 Rc4 38.b6+=) 35.Rd8 Nb6 (worse is 35...Rb2 36.Rc8 b6 37.Rc6+=) 36.Rd6 ½–½. Frosinos,I (1640) – Bras,E (1995), 11th Gazi Open, 2015.

7.b5 Be7 8.a4 (8.Nc3 cb5 9.Nb5 0-0=) 8...Qb6 (8...Nbd7 9.Nc3=) 9.c4 0-0 10.Nc3 Nbd7 11.a5 Qc7 12.0-0 Bd6 (12...Rfc8 13.cd5 cd5 14.Rfc1=) 13.cd5 ed5 (worse 13...cd5 14.b6 ab6 15.Nb5+-) 14.d4 Rfe8 15.Rfc1 Ng4 (15...a6!?=) 16.h3 (16.a6 Rab8 17.Nd5 Bh2 18.Kf1+=) 16...Nh2?? (better 16...Ngf6+-) 17.Ne1+- Nf6 (17...f5 18.Nd5! Qb8 19.bc6 bc6 20.Rc6+-) 18.bc6 bc6 19.Nb5! Qb8 (19...cb5 20.Rc7 Pinning (20.Rc7 Deflection; 20.Rc7 Clearance)) 20.Nd6 (20.Rc6 Ne4+-) 20...Qd6 21.Ba3 Qc7 22.g3 Nhg4 (22...h5 23.Kh2 h4 24.Nf3 hg3 25.fg3+-) 23.hg4 Re4 (23...Qd7 24.f3 Qc7 25.Kg2+-) 24.g5 Ng4 (24...Nd7 25.Nd3+-) 25.Ng2 Rae8 (25...Kh8 26.Rab1+-) 26.Qa6 Ne3 (26...Qd8 27.f3 Re3 28.Ne3 Ne3 29.Qc6 Re6+-) 27.Rc6 Qb8 28.fe3 Qg3 29.Rc8 Re3 (29...h6 30.gh6 Kh7 31.Re8 Re8 32.Qa7 Re6 33.Qf7 Rh6+-) 30.Qc6 (30.Qc6 h6 31.Re8 Re8 32.Qe8 Kh7 33.Rf1 h5 34.Rf7 Qa3 35.Qe5 Qc1 36.Kh2 Qg1 37.Kg1 Kg6 38.Rg7) 1–0. GuestKBLD – Gaswar, freechess.org, 2020.

6.a3 c6 7.Nf3 a5 8.0-0 (8.b5!?=) 8...ab4=+ 9.ab4 (9.d3 Bc5-/+) 9...Ra1-/+ 10.Ba1 Bb4 11.Nc3 0-0 (11...Qe7 12.Rb1-/+) 12.Rb1 Qe7 13.Ne5 (13.Nd1 Ng4-/+) 13...Bd6 14.Ng4 (14.f4 b5-/+) 14...Ng4 (14...Nfd7 15.f4 (15.Rb7? f5-+) 15...b5 16.Qf3-/+) 15.Qg4 f5 16.Qd4 (16.Qh5 e5-/+) 16...e5 (16...f4 17.ef4 Rf4 18.Qa7-+) 17.Qb6 Rf7 18.Ne2 Na6 19.h3 (19.Bc3 Qh4-/+) 19...Nb4-+ 20.c3 (20.Rc1 Rf8 21.Bc3 f4 22.ef4 ef4-+) 20...Nd3 Black intends f4 (20...Na6 21.d4-+) 21.Nc1 Nc1 22.Rc1 f4 23.c4 fe3 (23...dc4 24.Rc4 f3 25.Ra4 fg2 26.Ra8 Rf8 27.Qb3 Qf7 28.Rf8 Kf8 29.Qd3-/+) 24.de3 (24.Qe3 Ba3 25.Rd1 d4-/+) 24...Bc5 (24...Qh4 25.Rc2 dc4 26.Ra2-+) 25.Qb2? (better 25.Qa5 d4 26.ed4 ed4 27.Qd2-+) 25…Ba3 (25...Ba3 26.Qd2 Bc1 27.Qc1 Qh4 28.cd5 Qf2 (28...cd5?! 29.Qc8 Rf8 30.Qb7-+) 29.Kh2 Qf1 (29...cd5?! 30.Qc8 Rf8 31.Qb7-+) 30.Qf1 Rf1 31.Be5 cd5-+) 0–1. Rush,Bradley – Couspeyre,Thierry, ZL–2011–0-00904, 2011.

6.a3 c6 7.Nf3 g6 8.0-0 Bg7 (8...a5 9.b5=) 9.d3 0-0 10.Nbd2 Nbd7 11.c4 (11.e4 Qc7+=) 11...Re8 (11...a5 12.e4+=) 12.Rac1 (12.Rfc1 a5+=) 12...Rc8 (12...a5 13.b5=) 13.cd5 (13.e4 c5+=) 13...ed5= 14.Rfe1 (14.Nb3 Qe7=) 14...Re7 (14...a5 15.Bd4=) 15.Nb3 Qe8 (15...Nf8 16.Qc2+=) 16.Na5 (16.Bd4 b6+=) 16...Nb6 (16...Nf8 17.Qc2+=) 17.Qc2 Rcc7 (17...Qd7 18.Nb3+=) 18.h3 (18.Bd4 Re6+=) 18...Nc8 (18...Rc8 19.Nb3+=) 19.Nb3 (19.Bd4 Nb6+=) 19...Nd6 20.Nbd4 (20.Qc5 Nb5+=) 20...Nd7 21.Nb3 Bb2 (21...Nf6 22.a4+=) 22.Qb2+= Nf5 (22...f6 23.Nbd4+=) 23.Nbd4 Nd4 24.Qd4 b6 (24...a6 25.Qf4 Rc8 26.Qh4+=) 25.Qh4 (25.Rc2 Ne5+=) 25...Nf8 (25...Ne5 26.Ne5 Re5 27.Rc2+=) 26.d4 (26.Rc2 c5+=) 26...Re4 (26...Kg7 27.Rc3+=) 27.Qg3+- Nd7?? (better 27...Ree7+-) 28.Qc7+- Nf6 (28...Nb8 29.Ne5 f6 30.Nc6 Nc6 31.Qc6+-) 29.Rc6 (29.Rc6 Re7 30.Qc8+-) 1–0. Fournier,Frederic – SoyLudwig, Active, 2004.

6.a3 Nbd7 7.Nf3 Bd6 (7...a5 8.Qb5=) 8.c4 (8.0-0 0-0=) 8...c6 (8...dc4 9.Qc4 a5 10.d3=) 9.d3 0-0 10.e4 (10.0-0 a5 11.c5 Be7=) 10...e5 (10...Nh5 11.0-0=) 11.Nbd2 (11.0-0 d4=) 11...Nh5 12.g3 f5 (12...Re8!?=) 13.cd5 (13.ed5 cd5 14.0-0 Re8+=) 13...cd5 14.ed5 Rc8 (14...Re8 15.0-0+=) 15.Nc4+/– (15.Ne5 Ne5 16.0-0 Rc2 17.Be5 Be5-/+; 15.Be5? Ne5 16.0-0 Nf3 17.Qf3 g6-+) 15...Bb8 16.0-0 (16.Nfe5 Ne5 17.Ne5 Nf6+/–) 16...Ndf6 (16...Re8 17.Nfe5 (< 17.Be5 b5=+) 17...Ne5 18.Be5 Be5 19.Ne5+/–) 17.Nfe5 Qd5 18.Qf3 (18.f4 Qe6+/–) 18...b5 19.Ne3 (19.Qd5 Nd5 20.Ne3 Nhf6+/–) 19...Qf3 20.Nf3 f4 21.Nf5 Rc2 22.Rab1 fg3 23.hg3+- Ng4 24.N5d4 Rcc8 25.Kg2 a6 26.Rbc1 Ne5 27.Ne5 Be5 28.Nc6 Bb2+/– 29.Ne7 Kf7 30.Nc8 Bc1 31.Rc1 Ke6 32.Na7 Rd8 33.Rc3 Nf6 34.Nc6 Rd6 35.Na5 Nd5 36.Rc1 Nb6 37.Nb7+- Rd3?? 38.Nc5 (38...Kd5 39.Nd3+-) 1–0. Teichmann,Erik (2365) – Levi,Eddy (2270), Australian Masters, 1998.

6.a3 Be7 7.Qb5 Nbd7 +=.

6.a3 Be7 7.Nf3 0-0 8.0-0 (8.Nc3 a5=) 8...c5 (8...Nbd7 9.Nc3=) 9.bc5 Bc5 10.d4 (10.Nc3 Nc6=) 10...Be7 (10...Bd6 11.Nbd2=) 11.Nbd2 Nc6 12.c4 (12.Rab1 Qc7=) 12...Rc8 13.cd5 (13.Rfc1 Bd6=) 13...Nd5 (13...ed5 14.Rfc1=) 14.Rfc1 Qb6 (14...Qd7 15.Nc4=) 15.Nc4 (15.Rc2 Ne5 16.Rac1 Rc2 17.Rc2 Nf3 18.Qf3 f5=) 15...Qc7 (15...Qa6 16.Rc2=) 16.Nce5+= Qd8 (16...Qd6 17.e4 Nb6 18.Nc6 Rc6 19.Rc6 Qc6 20.Rc1=) 17.Qb5 (17.Nc6 bc6 18.Rc2 Bd6+=) 17...Ne5 (17...a6 18.Qb3= (worse 18.Qb7 Ne5 19.Ne5 Rb8 20.Qa6 Rb2-/+)) 18.Ne5 Nb6 (18...a6 19.Rc8 (worse 19.Qb7 Rb8 20.Qa6 Rb2-/+) 19...ab5 20.Rd8 Rd8 21.Kf1=) 19.Rc8+= Qc8 20.Rc1 Qd8 21.a4 a6 (21...Qd5!?+=) 22.Qb3+- Qd6 23.Nc4 (better 23.a5!? Nd7 24.Qb7 Ne5 25.de5+-) 23...Nc4= 24.Qc4 h6 (24...Rb8 25.Qc7=) 25.Qc7 (25.e4 Qf4 26.Qd3 Rd8=) 25...Qb4 (25...Rb8 26.e4=) 26.Bc3+= Qd6 (better 26...Qa3 27.Rb1 Bd6=) 27.Ba5?? (27.Qb7!? Rb8 28.Qe4+=) 27...Qa3?? (better 27...Qc7 28.Rc7 Bd8-+) 28.Bd2= Qb2 (28...b5 29.ab5 ab5 30.e4=) 29.Qc2 (29.Qe7 Qd2 30.Qc5 b6=) 29...Qb6 (29...Qc2 30.Rc2 Rb8 31.Rc7=) 30.g3 (30.Rb1 Qc6 31.Qc6 bc6+=) 30...Bf6 (better 30...Rb8!?=) 31.Rb1+- Qa7 (31...Qc6 32.Qc6 bc6 33.Rb6+-) 32.Bb4 (32.Qc7 Rb8+-) 32...Rd8+= 33.Qc7 Qb8 34.Qb8 (34.Bd6 Qc7 35.Bc7 Rd7 36.Rb7 Kh7+-) 34...Rb8 35.Bd6 Rd8 36.Bc7 Rd7 37.Rb7 Bd8 (37...Kh7!? 38.Ra7 Kg6+-) 38.Rb8+- Rc7 39.Rd8 Kh7 40.Rd6 Ra7 41.a5 Kg6 42.Kg2 Kf6 43.e4 White plans d5 (43.Rb6 Ke7+-) 43...Ke7 44.Rc6 Kd7 (44...Rd7 45.Ra6 Rd4 46.Kf3+-) 45.Rb6 (45.d5 h5+-) 45...Kc7 (45...h5 46.f4+-) 46.d5 ed5 47.ed5 f6 (47...Kd7 48.Kf3+-) 48.f4 Kd7 (48...f5 49.Kf2+-) 49.Kf3 Kc7 (49...Kd8 50.Ke4+-) 50.Ke4 (50.d6 Kd7+-) 50...Kd7 51.Kf5 Ke7 52.d6 (52.Kg6 Rd7+-) 52...Kf7 53.Rc6 g6 54.Ke4 Ke6 55.Rc7 (better 55.d7 Kd7 56.Rf6+-) 55...Ra8 56.d7 (56.Rg7 Rb8 57.Rg6 Rb4 58.Ke3 Ra4+-) 56...Rd8 57.g4 Rd7?? (57...f5 58.gf5 gf5 59.Kd4 Kd6+-) 58.Rd7 (58.f5 gf5 59.gf5 Kd6 60.Rd7 Kd7+-) 58...Kd7 59.Kd5 h5 60.h3 (better 60.g5 Ke7 61.Kc6 f5+-) 60...hg4?? (better 60...h4 61.Ke4 Ke6=) 61.hg4+- g5 (61...Ke7 62.Kc6 Ke6+-) 62.f5 Ke7 63.Kc6 Kd8 64.Kb6 (better 64.Kd6!? Kc8+-) 64...Kd7 65.Ka6 Kd6 66.Kb7 Ke5 67.a6 (better 67.Kc6 Kf4 68.Kd5 Kg4+-) 67...Kf4 68.a7 Kg4 69.a8Q Kf5 70.Qc8 (70.Kc6 Kf4+-) 70...Kf4 71.Qh3 (better 71.Qc1 Ke4+-) 71...f5 Black prepares g4 (71...g4 72.Qh6 Ke4 73.Qf6+-) 72.Kc6 g4 73.Qg2 Kg5 (73...g3+-) 74.Kd5 f4 (74...Kf6 75.Qb2 Kf7 76.Qh8 f4 77.Ke5 f3 78.Qh7 Ke8 79.Ke6 g3 80.Qe7) 75.Ke4 (75.Ke5 Kg6 76.Qc6 Kg7 77.Qf6 Kg8 78.Qg6 Kf8 79.Ke6 f3 80.Qf7) 75...f3 (75...Kf6 76.Qb2 Kg6 77.Qb6 Kh7 78.Kf5 g3 79.Qg6 Kh8 80.Kf6 f3 81.Qg7) 76.Qg3 f2 (76...Kg6 77.Qg4 Kf7 78.Qf5 Ke8 79.Qe6 Kd8 80.Kd5 Kc7 81.Qc6 Kb8 82.Qb6 Kc8 83.Kd6 f2 84.Qc7) 77.Qf2 Kh5 (77...Kg6 78.Qb6 Kh7 79.Kf5 Kg7 80.Qc7 Kg8 81.Kf6 g3 82.Qg7) 78.Kf4 (78.Kf4 Kg6 79.Qb6 Kg7 80.Kf5 g3 81.Qc7 Kh6 82.Qf7 g2 83.Qg6; 78.Qf6 g3 79.Kf4 g2 80.Qg5) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

6.a3 Be7 7.Nf3 (7.Qb5 Nbd7+=) 7...c6 8.c4 dc4 9.Qc4 Nbd7 10.d4 Nb6 11.Qc2 Qc7 12.Nbd2 h6 13.0-0 0-0-0 (13...0-0!?=) 14.Rfc1 g5? (better 14...a6+=) 15.b5+- Bd6 16.bc6 bc6 17.Nc4 (17.d5!? Nfd5 18.Bh8 g4+-) 17...Nc4 18.Qc4 Kd7 19.Ne5 The isolani on c6 becomes a target 19...Be5 20.de5 Ne8?? (20...Nd5 21.e4 Ne7 22.Bc3+-) 21.a4 (better 21.Rd1 Nd6 22.ed6+-) 21...Ng7+- 22.Ba3 Ke8 (22...Nf5!?+-) 23.Bd6 Qc8 24.Rab1 Qd7 (24...Nf5 25.Qc6 Qc6 26.Rc6 Nd6 27.ed6 Kd7+-) 25.Qa6 (worse 25.Qc6 Qc6 26.Rc6 Nf5+-) 25...Rc8 (25...Nf5 26.Rb7 Nd6 27.Rd7 Rd7+-) 26.Rb7 Qd8 27.Re7 Qe7 28.Be7 (28.Qc8 Qd8 29.Qc6 Qd7 30.Qa8 Qd8 31.Rc8 f6 32.Qa7 Nf5 33.Rd8 Kd8 34.Qc7 Ke8 35.ef6 Rh7 36.f7 Rf7 37.Qc8) 28...Ke7 29.Qa7 (better 29.Qb7 Kf8 30.Qc8 Ne8 31.Rc6+-) 29...Kf8 30.Qd7 Re8 31.Rc6 Nf5 32.Rc8 (32.Kf1!? Kg7+-) 32...Rc8 33.Qc8 Kg7 34.Qb7 Rd8 35.g3 Rd1 36.Kg2 Rd2 37.Kf1 Ra2 38.Qb3 Rd2 (38...Ra1 39.Ke2+-) 39.a5 Rd5 (39...Rd7 40.a6 Ne7 41.Qb8 Rd1 42.Kg2+-) 40.a6 (40.Qd5! ed5 41.a6 d4+-) 40...Ra5 41.Qb7 Ra1 42.Kg2 Ra2 43.Kf3 Ra3 (43...g4 44.Kg4 Rf2 45.Qb3 h5 46.Kg5+-) 44.a7 Nd4 45.Kg2 (45.Ke4 Nb3 46.a8Q Nd2 47.Kd4 Ra8 48.Qa8 g4+-) 45...Nc6 46.a8Q (46.a8Q Ra8 47.Qa8 Ne5 48.Qa1+-) 1–0. Fournier,Frederic (1885) – Denker, Active, 2012.

6.b5 c6 7.a4 Bc5 8.Nf3 Qb6 (8...a6 9.Nc3=) 9.Bf6+= gf6 10.0-0 cb5 (10...Rg8 11.Nc3+=) 11.ab5+- Nd7 12.c4 (better 12.d4 Be7 13.Nbd2+-) 12...Ne5? (better 12...d4+=) 13.cd5+- ed5 14.d4 Nf3 15.Qf3 Be7? (better 15...Bb4+-) 16.Nc3 Rd8 (16...0-0+-) 17.Nd5 Qb5 (17...Rd5 18.Qd5 0-0+-) 18.Nc7 (18.Nc7 Kf8 19.Nb5+-) 1–0. DEFFM – GuestPTCW, freechess.org, 2019.

6.b5 Bd6 7.Nf3 0-0 8.0-0 a6 9.a4 Nbd7 10.d4 (10.d3 e5=) 10...c5 (10...Ne4 11.c4=+) 11.bc6= bc6 12.c4 Qe7 13.c5 (13.Nc3 Rfb8=) 13...Bc7 14.Nc3 (14.Nbd2 Rfb8 15.Rfb1 e5 16.de5 Ne5 17.Be5 Be5 18.Ne5 Qe5=) 14...e5=+ 15.Rab1 Rfe8 16.Rfe1 e4 (16...Qf8 17.Qf1=+) 17.Nd2= Nf8 18.Ba3 h5 (18...Ne6 19.Rb2=) 19.Rb3 Ng4 20.Nf1 (20.h3 Nf6+=) 20...Qh4 Can h2 get defended? (20...Qg5 21.h3 Nf6 22.Reb1=) 21.h3 Re6 (21...Nf6!?=) 22.Rb7+- (worse 22.hg4 hg4 23.Ng3 Rh6=) 22...Ba5 23.Bb4 Bb4 24.Rb4 Rg6? (better 24...a5 25.Rb7 Nf6+-) 25.Ng3?? (better 25.hg4 hg4 26.Ng3+-) 25...Nf2= 26.Qf2 (26.Nf5 Rg2 27.Kg2 Qh3 28.Kf2 Qh2 29.Kf1 Qh1 30.Kf2 Qh2 31.Kf1 Qh1 32.Kf2 Qh2=) 26...Qg3 (26...Rf6 27.Nf5 Qf2 28.Kf2 Rf5 29.Ke2=+) 27.Qg3 Rg3 28.Rb6 Rg6 29.Reb1 Nd7 (29...Re6 30.Rb8 Rb8 31.Rb8+=) 30.Rb7+= Nf8 (30...Nf6 31.Rb8 Rb8 32.Rb8 Kh7 33.Rb6+=) 31.Rb8 (31.R1b6 h4+-) 31...Ra7 (better 31...Rb8!? 32.Rb8 f5+=) 32.Rc8 (32.R1b6 Rc7+-) 32...f5+- 33.Rbb8 (33.Rb6 Rg3 34.Kf2 f4 35.Rbc6 Re3 36.Nd5 Rd3 37.Nf4 Rf7+-) 33...Rf7 34.Ne2 h4 35.Ra8 Rh6 (better 35...a5!?+-) 36.Ra6+- Rff6 37.Raa8 (37.a5 g5 38.Raa8 Rhg6+-) 37...g5 Black prepares the advance f4 (37...Rf7 38.a5 Rhf6 39.a6+-) 38.a5 f4 (38...Rhg6+-) 39.a6 f3 (39...Rh7 40.a7 Ra7 41.Ra7+-) 40.Rf8! (40.Rf8 Rf8 41.Rf8 Kf8 42.a7+-) 1–0. Ferreiro Montoya,JI – Suarez Real,A (2115), Cantabria selection op, 2000.

6.Qb5 Nc6 =.

6.Nf3 Bb4 7.Qb5 Nc6 8.Nd4?? (better 8.Qb7 Kd7 9.Qb5+-) 8...Be7 9.Nc6 bc6 10.Qc6 Nd7 11.Bg7 Rg8 12.Be5 Kf8 (worse 12...Rg2 13.Bg3 Kf8 14.Nc3+-) 13.Bg3 h5 14.h4 (14.Bc7?! Qc8 15.Qc3 Rg2=) 14...Rg3 15.fg3 Nc5 16.Nc3 Rb8 17.Ke2?? (better 17.Rb1 Rb1 18.Nb1+/-) 17...Rb6-+ 18.Qa4 (18.Qb6 cb6 19.Raf1-+) 18…Na4 (18...Na4 19.Na4 Rc6-+) 0-1. norba94 (2215) - killercars (2220), Rated Blitz game, lichess.org, 2015.

6.Nf3 c6 7.a3 =.

6.Nf3 Nbd7 7.b5 Bd6 8.0-0 0-0 9.a4 c6 10.bc6 (10.Nc3 Qc7=+) 10...bc6 11.c4 (11.Nc3 Rb8 12.Ba3 Ba3 13.Ra3 e5=+) 11...Rb8 (11...e5 12.d4 e4 13.Ne5=+) 12.Bf6 (12.d4 Qb6 13.Ba3 c5=+) 12...Nf6 (12...Qf6 13.d4=+) 13.d4= Qa5 14.c5 Bc7 15.Nbd2 (15.Qc2 Rb4=) 15...Rb2=+ 16.Rab1 (16.Rfb1 Rb1 17.Nb1 e5=+) 16...Ra2 17.Qd3 Rc8 (17...Qa4 18.Rb7 Rc8 19.Rfb1=+) 18.Rb7 Qa4 19.Rfb1 g6 (19...Ra1 20.Ra1 Qa1 21.Qf1=+) 20.g3 (20.e4 Ra3 21.Qe2 de4 22.Ne4 Ne4 23.Qe4 Ra1=+) 20...Kg7 21.h3 Ra3 (21...Qa6 22.Qa6 Ra6 23.Ne5=+) 22.Qf1 Nd7 23.Kg2 (23.Qe2 Ra1=+) 23...e5 24.Qc1 (24.Nb3 a5=) 24...e4-/+ 25.Ne1 (25.Nh2 Ra2=+) 25…Ra2 ½–½. de Visser,Arnold W (1995) – Hammerschmidt,Volker (1895), WS/O/539 ICCF, 2012.

6.Nf3 Nbd7 7.b5 Bd6 8.d4 0-0 (8...c6 9.bc6 bc6 10.0-0=+) 9.0-0 (9.Ba3 Nb6=+) 9...c6 (9...Nb6 10.Ne5=+) 10.c4= cb5 11.c5 Bb8 (11...Be7 12.Qb5 Qc7 13.Rc1=) 12.Qb5 Qc7 13.Rc1 Rc8 14.Nbd2 Ne4 (14...Qc6 15.Qc6 Rc6 16.Rab1=) 15.g3 (15.Ne4 de4 16.Ne5 Ne5 17.de5 a6=) 15...Nd2 16.Nd2 Qc6 (16...Nf6 17.Rab1 Qe7 18.Bc3=) 17.a4 (17.Qc6 Rc6 18.f3 Bc7=) 17...Bc7 (17...Qc7 18.Rab1 a6 19.Qb4=) 18.Bc3 (18.f3 e5=) 18...Bd8 (18...Rcb8 19.Rab1=) 19.Rcb1 (19.Qc6 Rc6 20.a5 Rac8=) 19...b6=+ 20.a5 (20.cb6 Qc3 21.b7 Nf6+-) 20...Qb5 (20...bc5 21.dc5 Nc5 22.h4-/+) 21.Rb5 a6 22.Rb3?? (22.Rb6 Bb6 23.ab6 Nb6 24.f3-/+) 22...bc5-/+ 23.Rb7 cd4 24.Bd4 Rc7 25.Rab1 Nf6 26.Rb8 Rc8 27.Ra8 Ra8 28.Bb6 Be7 29.Rc1 Ne8 30.Nf3 Bf6 31.g4 h6 32.h4 g6 33.g5=+ hg5 34.hg5 Bg7 35.Nd4 Nd6-/+ 36.Kg2 Nc4 37.Nc6 Bf8 38.Rh1 Bd6 39.f4 Rc8-/+ 40.Bd4 e5 41.fe5 Rc6?? 42.ed6+/– f6 43.gf6 Nd6 44.Rh8 Kf7 45.Rh7 Kf8 46.Kf3 Nf5 47.Bb2+/– Nd6 48.Rd7 Nc4+= 49.Bc3 Ke8?? 50.f7+- (50...Kd7 51.f8Q+-) 1–0. Lorenc,Tomas (2185) – Bartos,Alois (2110), CZE–chT2a, 2001.

6.Nf3 Nbd7 7.Qb5 Rb8 =.

6.a3 a5 7.ba5 (7.b5 Nbd7+=) 7...Nc6 8.d3 (8.Bf6 Qf6 9.Nbc3 Bd6+=) 8...Bd6 9.Nbc3 Ra5 10.0-0 0-0 11.Nd4 (11.a4 e5+=) 11...Nd4 12.ed4 Qd7 13.Qd2 Rfa8 14.Rfb1 R5a6 15.Bc1 c6 16.h3 (16.g3 b5-/+) 16...b5 17.Ne2 e5 (17...Qc7 18.Qc3-/+) 18.de5 Be5 19.c3 Ra4 20.d4 (20.Qc2 h6-/+) 20...Bd6 21.Rb3 (21.Qd3 h6-/+) 21...Qf5-+ 22.Ng3 Qg6 23.Qe3 (better is 23.Qd1-+) 23...Re8 24.Qf3 (24.Qd2 Bg3 25.fg3 Qg3-+) 24...Re1 25.Nf1 Ne4 26.g3 (26.Rbb1 Ra8-+) 26...h6 27.Rab1 (27.Qg4 Qg4 28.hg4 Nd2 29.Bd2 Ra1-+) 27...Bg3! 28.Be3 (28.fg3 Qg3 Deflection) 28...Bf2 0–1. Hovla1 – marekt, ChessWorld.net, 2015.

6.a3 c5 7.b5 Bd6 8.0-0 Nbd7 9.d3 Qc7 10.h3 0-0 11.Nd2 e5 12.a4 e4 13.f3 Rfe8 14.d4 ef3 15.Nf3 (15.Rf3 Re7-/+) 15...Ne4 (15...Re3 16.dc5 Bc5 17.Bd4-/+) 16.c3 (16.dc5 Bc5 (16...Nec5?! 17.Nc3=) 17.Bd4 Ndf6+=) 16...f5 (16...Nb6 17.Qd3-+) 17.Rc1 (17.dc5 Qc5 (worse is 17...Ndc5 18.Qd5 Qf7 19.c4+=) 18.Nfd4 g6+=) 17...Ndf6 18.Nh4 (18.c4 dc4 19.Ne5 c3 20.Nc3 Ng3 21.Qb3 Kf8=) 18...g6 19.Ba3 (better is 19.Nf3!?-/+) 19...Bh2-+ 20.Kh1 Ng3 (20...Bg3!? 21.Nf5 gf5 22.Kg1-+) 21.Ng3-/+ Bg3 (21...Qg3? A) worse is 22.Bc5 Qh4 (worse is 22...Re3 23.Nf3+/–) 23.Kh2 Re3+=; B) 22.Nf3 c4 23.Nh2+-) 22.Nf3 Re3 (22...c4 23.Qd2-+) 23.Bc5 (23.dc5!? Rae8 24.Bb2+=) 23...Ne4-/+ 24.Rc2 Nc5 25.dc5 Qc5 26.Qd4 Qd4 27.cd4 Rae8 28.Rcc1 Ra3 29.Ra1 Ree3 30.a5 (better is 30.Ng1-+) 30...Ra1 31.Ra1 Rb3 32.Kg1 Rb5 33.Ne5 Be5 34.de5 Kf7 35.Rc1 Ke6 36.Rc7 Ke5 37.a6 ba6 38.Ra7 a5 39.Rh7 d4 40.Re7 Kf4 41.Kf2 Rb2 42.Kf1 d3 43.Rd7 Ke3 44.Re7 Kd2 45.Ra7 Kc1 46.Kg1 d2 47.Ra5 d1Q 48.Kh2 Qd2 49.Rc5 Kb1 50.Kg3 Qf2 51.Kh2 Qg2 0–1. normn – Sim1, ChessWorld.net, 2012.

6.a3 c5 7.b5 Nbd7 8.0-0 Be7 9.d3 0-0 10.Nd2 a6 11.a4 Qb6 12.c4 Rfd8 13.Qc2 Nf8 14.Nf3 Ng6 15.h3 h6 16.Kh1 (16.a5 Qd6=) 16...Qc7 (16...Qd6 17.a5=) 17.Nd2 (17.Kg1 e5=) 17...Nh5 (17...Qd7 18.Rfd1=+) 18.f4 (18.cd5 ed5 19.Rfc1 ab5 20.ab5 Ra1 21.Ra1 Qd7=) 18...d4 (18...Qd7!? 19.Rfd1 d4=+) 19.g4+= Nf6 20.ed4 cd4 21.Bd4 (21.f5 ef5 22.gf5 Nh4=) 21...ab5 22.ab5 Ra1 23.Ba1 (< 23.Ra1 Nf4 24.Nf4 Qf4 (24...Rd4?! 25.Ne2 Rd8 26.d4=+) 25.Bf6 Qf6-/+ (25...gf6?! 26.Kg2-/+)) 23...Bf8? (better is 23...Nd5 24.Qb2 Bf6=) 24.Bf6+- gf6 25.Ne4 (25.f5 ef5 26.Rf5 Ne7 27.Rf6 Nd5+-) 25...Bg7 26.d4 (26.f5 Ne5 27.Nf4 Qe7+-) 26...f5+/– 27.gf5 ef5 28.N4g3 Nh4. Gross,Wilhelm – Merten,Rainer, xiii/27, 1988.

6.a3 c5 7.c3 Nbd7 8.d3 Be7 (8...Bd6 9.Nd2=+) 9.0-0 0-0 10.Nd2 Ne5 (10...Qc7 11.Qb3=+) 11.Qc2 (11.Nf4 c4 12.d4 Ned7=+) 11...c4 12.dc4 Nc4 (12...dc4 13.Nd4=+) 13.Nc4 dc4 14.Rfd1 (14.Rad1 Qc7=) 14...Qc7 15.h3 (15.Nd4 Rad8=+) 15...e5 (15...Rfd8 16.Rd8 Rd8 17.Rd1=+) 16.Rd2 (16.Ng3 Rfd8=) 16...Rfd8 (16...Rad8 17.Rad1=+) 17.Rad1 b5 (17...Rd2 18.Rd2 a5 19.e4=+) 18.Ng3 (18.a4 Rd2 19.Rd2 ba4 20.Qa4 Rd8 21.Rd8 Qd8=) 18...Rd2 19.Rd2 Rd8 20.Nf5 Bf8 (20...Rd2 21.Qd2 e4 22.Nd4=+) 21.Qd1 (21.e4 Rd2 22.Qd2 g6=) 21...Rd2 22.Qd2 g6 23.Ng3 Be7 24.Qc2 Qc6 25.Bc1 Kg7 26.e4= Qd7 27.f3 h5 28.Ne2 a5 29.Be3 Bd8 30.Kf2 Qd6 31.g4 ab4 32.cb4 hg4 33.fg4 Bb6=+ 34.Bb6 Qb6 35.Kf3 Qa7 36.Qc3 Qb8 37.Qb2 Qd6 38.Qc2 Ne8 39.g5 Nc7 40.h4 Ne6 41.Qb2?? Qd3-+ 42.Kf2 Qe4 (43.Kg3 Nd4 44.Nd4 Qf4 (< 44...Qd4 45.Qe2-+; 44...ed4 45.Qf2 Qe5 46.Kg2-+) 45.Kg2 ed4-+) 0–1. coloplayah (2140) – paloypalo (2060), net–chess.com, 2006.

6.a3 c6 7.0-0 a5 8.ba5 (8.b5 cb5 (8...Bd6 9.Nbc3 0-0 10.f4 c5 11.Ng3 Nbd7 12.Qe2 a4 13.Nh5 Qb6; 8...Nbd7 9.Nbc3 Ne5 10.Rb1 Qd7 11.bc6 bc6 12.Na4 Nc4 13.Bc3 Bd6) 9.Bf6 Qf6 10.Nbc3 Be7 11.Nb5 Na6 12.a4 0-0 13.f4 Rac8) 8...Ra5 (8...Bd6 9.Bf6 Qf6 10.Nbc3 Ra5 11.Qb1 b5 12.Nd4 0-0 13.f4 Rc8; 8...Nbd7 9.Bc3 Bd6 10.d3 Bc7 11.Nd2 Ba5 12.Nf3 Bc3 13.Nc3 0-0) 9.d3 (9.Nbc3 Nbd7 10.Nd4 Bd6 11.f4 0-0 12.a4 Nc5 13.Qe2 e5) 9...Nbd7 (9...Bd6 10.Bc3 Ra6 11.Nd2 Nbd7 12.Nd4 0-0 13.f4 Nc5) 10.Nd2 (10.Nd4 Bd6 11.Nc3 0-0 12.Qd2 Nc5 13.f4 g6) 10...Be7 (10...Bd6 11.Bc3 Ra4 12.Nd4 0-0 13.f4 Qc7) 11.c4 (11.Nb3 Ra8 12.Ned4 0-0 13.f4 g6) 11...0-0 12.cd5 (12.Nb3 Ra6 13.cd5 ed5) 12...ed5 (12...Rd5 13.Nf4 Rb5) 13.Nd4 (13.Bc3 Ra8) 13...g6 (13...Bd6=+) 14.N2b3 Ra6 15.a4 Re8 16.a5 Bb4 17.Qc2 Qe7 18.Ra4 Bd6 19.Nf3 b5 20.Rh4 c5 21.Rh3 (21.Ra1 Rea8=) 21...Rc8=+ 22.Ra1 c4 23.dc4 dc4 24.Bd4 Rca8 25.Nbd2 Ra5 26.Ra5 Ra5 27.e4 Bc5 28.Bc3 Ra8 29.e5 Nd5 30.Qe4 (30.Bb2 Nf4 31.Rh4 Nd3-+) 30...N7f6 (30...Nc3?! 31.Qa8 Kg7 32.Ne4 Ne2 33.Kf1=) 31.Qh4 (31.Qc2 Nc3 32.Qc3-+) 31...Nc3 32.g3 Nh5 33.Ng5 (33.Qe7 Be7 34.Kf1-+) 33...Qe5 34.Ndf3 (34.Nge4-+) 34...Ra1 35.Kg2 (35.Ne1 Qe1 36.Kg2 Qf2) 35…Qe2 (35...Qe2 36.Nd4 Qd1 37.Qh5 Qh1) 0–1. Ivanets,Vladimir (2245) – Pushkov,Nicolay (2510), 17th Senior WCh, Gmunden AUT, 2007.

6.a3 c6 7.0-0 Bd6 A) 8.Nd4 Nbd7 (8...0-0 9.Nc3 a5 10.Qe2 Nbd7 11.f4 Qb6 12.b5 c5 13.Na4 Qc7; 8...a5 9.Nc3 Nbd7 10.Qe2 0-0 11.f4 Qb6 12.b5 c5 13.Na4 Qc7) 9.Nc3 a5 10.Qe2 0-0 11.f4 Qb6 12.Na4 Qc7 13.b5 c5; B) 8.f4 Nbd7 (8...0-0 9.Nd4 a5 10.Nc3 Nbd7 11.Qe2 Qb6 12.b5 c5 13.Na4 Qc7; 8...a5 9.Nbc3 Nbd7 10.b5 c5 11.Rf3 0-0 12.Rg3 Qb6 13.d3 e5) 9.Nbc3 0-0 10.Nd4 a5 11.Qe2 Qb6 12.b5 c5 13.Na4 Qc7; C) 8.h3 Nbd7 (8...0-0 9.Nd4 Nbd7 10.Nc3 a5 11.b5 c5 12.Nf3 Qc7 13.Qe2 a4) 9.Nbc3 0-0 10.Nd4 a5 11.b5 Ne5 12.bc6 bc6 13.d3 Rb8; D) 8.d3 Nbd7 (8...0-0 9.Nd2 Nbd7 10.Nf3 a5 11.Qd2 ab4 12.ab4 Qb6 13.Bc3 g6; 8...a5 9.Nbc3 0-0 10.b5 Nbd7 11.bc6 bc6 12.Rb1 e5 13.Ng3 g6) 9.Nbc3 0-0 10.Qd2 a5 11.b5 Ng4 12.f4 Bc5 13.d4 Bd6; E) 8.Nbc3 0-0 (8...Nbd7 9.Nd4 0-0 10.f4 a5 11.b5 c5 12.Nf3 a4 13.Qe1 Qb6; 8...a5 9.b5 0-0 10.f4 c5 11.f5 Qc7 12.Nf4 d4 13.Nce2 e5) 9.Nd4 Nbd7 10.Qe2 Ne5 11.d3 c5 12.bc5 Bc5 13.Nb3 Be7.

6.a3 c6 7.0-0 Nbd7 A) 8.f4 Bd6 (8...a5 9.b5 cb5 10.Nbc3 b4 11.ab4 Bb4 12.Nd4 0-0 13.Ncb5 Qb6; 8...Qb6 9.Nbc3 Bd6 10.Nd4 0-0 11.Qe2 a5 12.b5 c5 13.Na4 Qc7; 8...Nb6 9.Bf6 Qf6 10.Nbc3 a5 11.ba5 Nc4 12.Qb1 0-0-0 13.a6 ba6) 9.Nbc3 0-0 10.Nd4 a5 11.Qe2 h6 12.b5 c5 13.Nf3 a4; B) 8.Nf4 Bd6 (8...a5 9.b5 cb5 10.Nc3 Qb6 11.h4 b4 12.ab4 Bb4 13.Na4 Qc6) 9.Nc3 0-0 10.Rb1 Qc7 11.g3 d4 12.Nce2 e5 13.Nd3 de3; C) 8.Bf6 Qf6 9.Nbc3 Bd6 10.Nd4 a5 11.Qb1 e5 12.Nf3 0-0 13.Qb3 e4; D) 8.Nbc3 Bd6 (8...Ne5 9.Nb5 Nc4 10.Bf6 gf6 11.Nbd4 c5 12.bc5 Bc5 13.a4 Qa5) 9.Nd4 0-0 10.f4 Nb6 11.d3 a5 12.Qe2 Qd7 13.b5 c5.

6.a3 c6 7.Nbc3 A) 7...Nbd7 A1) 8.d3 Bd6 (8...c5 9.bc5 Bc5 10.0-0 0-0 11.Nf4 Qa5 12.h4 Rac8 13.Rb1 Bb6; 8...a5 9.b5 Bd6 10.0-0 0-0 11.bc6 bc6 12.Rb1 e5 13.Ng3 g6; 8...Qc7 9.Nd4 e5 10.Nb3 Bd6 11.0-0 0-0 12.h3 Rfe8 13.Qd2 Nf8) 9.Nd4 a5 10.0-0 0-0 11.b5 c5 12.Nf3 Qb6 13.Qe2 h6; A2) 8.f3 Bd6 (8...Ne5 9.0-0 Bd6 10.Nd4 Nc4 11.Qc1 Qd7 12.d3 Nb2 13.Qb2 e5; 8...Qc7 9.0-0 Bd6 10.f4 0-0 11.Nd4 a5 12.b5 c5 13.Nde2 e5; 8...Nb6 9.d3 Bd6 10.0-0 0-0 11.Qd2 Qd7 12.Nd4 e5 13.Nb3 h6) 9.Nd4 Ne5 10.0-0 0-0 11.d3 a5 12.Qe2 ab4 13.ab4 Bb4; A3) 8.0-0 Bd6 (8...Ne5 9.Ne4 de4 10.Be5 Bd6 11.Bf6 Qf6 12.f3 Be5 13.Rb1 ef3) 9.Nd4 a5 10.Qe2 0-0 11.f4 Qb6 12.b5 c5 13.Na4 Qc7; B) 7...Bd6 B1) 8.Nd4 Nbd7 (8...a5 9.0-0 Nbd7 10.Qe2 0-0 11.f4 Qb6 12.b5 c5 13.Na4 Qc7; 8...0-0 9.0-0 Nbd7 10.f4 a5 11.Qe2 Qb6 12.b5 c5 13.Na4 Qc7; 8...Qb6 9.0-0 0-0 10.f4 Nbd7 11.Na4 Qc7 12.Qe2 a5 13.b5 c5; 8...e5 9.Nf5 0-0 10.Qf3 g6 11.Qg3 Nh5 12.Nh6 Kg7 13.Nf5 Kg8; 8...Qc7 9.f4 0-0 10.Qe2 Nbd7 11.0-0 h6 12.d3 a5 13.b5 c5) 9.Qe2 a5 10.0-0 0-0 11.f4 Qb6 12.b5 c5 13.Na4 Qc7; B2) 8.f4 Nbd7 (8...0-0 9.0-0 Nbd7 10.Nd4 a5 11.Qe2 Qb6 12.b5 c5 13.Na4 Qc7; 8...a5 9.b5 c5 10.0-0 Nbd7 11.f5 0-0 12.fe6 fe6 13.Nf4 Qe7; 8...Qb6 9.0-0 Nbd7 10.Na4 Qa6 11.Bf6 Nf6 12.Nac3 0-0 13.Nd4 c5; 8...Na6 9.0-0 0-0 10.Qe1 h6 11.Qg3 Re8 12.Na4 Qe7 13.Rab1 b5) 9.Nd4 0-0 10.0-0 Qb6 11.Qe2 a5 12.b5 c5 13.Na4 Qc7; B3) 8.Rb1 a5 (8...Qc7 9.f4 Nbd7 10.0-0 e5 11.Qe1 ef4 12.ef4 0-0 13.Qf2 a5; 8...Nbd7 9.0-0 0-0 10.f4 Nb6 11.Rf3 Nc4 12.d3 Nb2 13.Rb2 Qe7; 8...0-0 9.0-0 Nbd7 10.b5 c5 11.f4 Qb6 12.Ng3 c4 13.a4 g6; 8...Na6 9.0-0 0-0 10.f3 h6 11.Nd4 Qd7 12.f4 c5 13.bc5 Nc5; 8...g6 9.0-0 0-0 10.Nf4 Nbd7 11.b5 Qc7 12.g3 a6 13.bc6 Qc6) 9.b5 0-0 10.0-0 c5 11.Nf4 Nbd7 12.Qf3 Qc7 13.h3 Ne5; B4) 8.0-0 Nbd7 (8...0-0 9.Nd4 Nbd7 10.f4 a5 11.Qe2 Qb6 12.b5 c5 13.Na4 Qc7; 8...a5 9.Nf4 0-0 10.h3 Nbd7 11.b5 Qc7 12.Qf3 Ne5 13.Qg3 d4) 9.Nd4 a5 10.Qe2 0-0 11.f4 Qb6 12.b5 c5 13.Na4 Qc7.

6.a3 Be7 7.d3 0-0 (7...a5 8.b5=) 8.Nd2 (8.0-0 c5=) 8...Nbd7 (8...a5 9.b5=) 9.c4 (9.0-0 c5 10.bc5 Bc5=) 9...c5 10.b5 (10.Qb3 dc4 11.dc4 cb4 12.ab4 a5=) 10...Nb6 11.a4 dc4 (11...a5 12.0-0=) 12.Nc4 (12.dc4 a6=) 12...Nbd5 (12...Nc4 13.dc4 Ne4 14.Qd8 Rfd8 15.f3=+) 13.0-0= Rc8 (13...Nb4 14.Ra3=) 14.Qb3 Nb4 15.Rfd1 (15.Rad1 Qd5=) 15...Qd5+= 16.Rac1 (16.Be5 Rfd8+=) 16...Rfd8 17.d4 (17.Be5 Nd3 18.Rc3 Ne5 19.Rd5 Rd5 20.Ne5 Re5=) 17...Qf5 (17...Qg5 18.dc5 Bc5 19.Na5 Rd1 20.Qd1=) 18.Ng3+= Qg6? (better 18...Qd5+=) 19.Ne5+- Qg5 20.dc5 (20.f4!? c4 21.Qb4 Qe5 22.de5 A) 22...Bb4?? 23.Rd8 (23.ef6?! Bd2+-) 23...Rd8 24.ef6+-; B) 22...Rd1 23.Rd1 Bb4 24.ef6 c3+-) 20...Rd1+- 21.Qd1 h5 (21...Nfd5 22.e4 Nf6 23.a5+-) 22.Nf3 (22.c6 bc6 23.Nc6 Nc6 24.Bf6 Qf6 25.Nh5 Qe5 26.bc6 Ba3+-) 22...Qg6 (22...Qd5 23.Bd4+-) 23.c6! bc6 24.Ne5 Qg5 25.Nc6 Nc6 26.Bf6 Qf6 27.Nh5 Qe5 28.bc6 (worse 28.Rc6 Rd8 29.Qc1 Ba3 30.Nf6 Qf6-+) 28...Ba3 29.Rc4 Qa5 (29...Bc5 30.g3 Be7 31.Kg2+-) 30.Ng3 Rd8 31.Rd4 Rc8 32.Qc2 (32.Qb3 Bf8 33.Rc4 Bd6+-) 32...Rb8? (better 32...Bc5 33.Rd1 Rc6+-) 33.c7+- Rc8 34.Rd7 Bc5 (34...Bf8 35.Qc6 Qb6 36.Qb6 ab6 37.Ne4+-) 35.Rd8! Rd8 36.cd8Q Qd8 37.Qc5 Qd1 38.Nf1 Qa4 39.Qd4 (39.h4 a6+-) 39...Qa2 (39...Qd4 40.ed4 a5 41.Ne3+-) 40.g3 (40.Qd8 Kh7+-) 40...a5 41.Nd2 a4 42.Qb4 (42.Kg2 Qc2+-) 42...a3 43.Nb1 Qa1 (43...Qb2 44.Qb2 ab2 45.Kf1+-) 44.Kg2 a2 (44...Qb2 45.Qb2 ab2 46.Kf3+-) 45.Nc3 g5 (45...e5 46.Qa5+-) 46.Qa3 (46.h4 gh4 47.gh4 Kg7+-) 46...g4 47.Na2 e5 (47...f5 48.Qa8 Kf7 49.Qb7 Kf6 50.Nb4+-) 48.Qa8 (48.Qa4!? Kh8+-) 48...Kg7 49.h3 (49.Qa4 e4+-) 49...gh3 50.Kh3 Qf1 51.Qg2 Qe2 (51...Qd3 52.e4+-) 52.Qd5 Qf2 53.Qe5 Kg6 (53...f6 54.Qe7 Kh6 55.Qe6+-) 54.Qe4 (better 54.Nc3!? Qf1 55.Kh4 Qf5 56.Qf5 Kf5 57.g4 Ke5+-) 54...f5 55.Qe6 Kg5 56.Qg8 Kf6 57.Qh8 (57.Qd8 Kg6 58.Qd6 Kh5+-) 57...Kg6 (57...Kf7 58.Qh7 Kf6 59.Qh6 Kf7+-) 58.Qg8 (58.Qe8 Kh6 59.Qc6 Kg5+-) 58...Kf6 59.Qd8 Kg6 60.Qd6 Kg7 61.Qd3 (61.Nb4 Qf3 62.Qd7 Kf8 63.Qc8 Kg7 64.Qc3 Kf7+-) 61...Qf3 (61...Qa2 62.Qf5 Qa6 63.e4+-) 62.Qc3 (better 62.Qd2 Qh1 63.Qh2 Qe4+-) 62...Kg6 (62...Kf7 63.Qc4 Ke7 64.Kh4 Qe3 65.Qc7 Kf6 66.Qc3 Qe5 67.Qe5 Ke5 68.Kg5+-) 63.Qe1 Qa8 (63...Kf6 64.Nc3+-) 64.Nc1 1–0. Schott,Detlef (1875) – Gockel,Mirco (1915), Niederrhein–ch, 2005.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c5 10.0-0 (10.Nbc3 Be7=) 10...Be7 (10...Bd6 11.f4=) 11.Bf6 (11.d3 0-0=) 11...Bf6 12.d4 (12.Re1 Qd7=) 12...c4 (12...Qa5 13.Nbc3=+) 13.Nbc3= Nd7 (13...0-0 14.e4=) 14.e4 Nb6 (14...de4 15.Ne4 0-0 16.Qd2=) 15.e5 (15.Qd2 0-0=) 15...Be7 (15...Bh4 16.Nf4=) 16.Nf4 0-0 (16...Bb4 17.Na2 Bf8 18.Qg4=) 17.Qg4 Kh8 (17...Bh4 18.Nce2=) 18.Ra1 (18.Nh5 g6 19.Nf4 Qa8=) 18...g6 (18...Qd7 19.Nh5 Rg8 20.Ra7+=) 19.Ra7 (19.Nfe2 Qd7=) 19...Qb8 (19...Qd7 20.Qh3+=) 20.Ra2 Bb4 (20...Qc7 21.Qf3+=) 21.Nfe2 (21.Nd1 Bd2+=) 21...Qc7= 22.Qf4 (22.Qf3 f6 23.ef6 Nd7=) 22...Ra8 (22...f6 23.Nd1=) 23.h4 (23.Ra8 Na8 24.Na2 Ba3=) 23...Bf8 (23...Kg8 24.h5=) 24.h5 Ra2 25.Na2 Qe7 (25...Kg8 26.hg6 hg6 27.Nac3=) 26.hg6 hg6 27.Nac3 Kg8 28.Qc1 Nd7 (28...Qh4 29.Qa1 Bb4 30.Nd1=) 29.g3 (29.Qa1 Qa3 30.Qa3 Ba3=) 29...f6 30.ef6 Nf6 (30...Qf6!? 31.Qe3 Qf5=) 31.Qg5+= Kg7 32.Nf4 Qe8 33.Qe5 Attacking the backward pawn on e6 33...Kf7 34.f3 Bh6 35.Qc7 (35.Kf1 Qe7+=) 35...Qd7= 36.b6 Bf4 (36...Bf8 37.Qe5 Qd6 38.Qg5+=) 37.Qf4+= Kg7 (37...Ke7 38.Qg5 Kf7 39.Qe5=) 38.Ne2+- Ne8 (38...Qf7 39.Kf2+-) 39.Qg5 Nd6? (better 39...Qf7 40.Nf4 Kh7+-) 40.Nf4+- Kf7 41.Qg6 Ke7 42.Qg5 (42.Qg7 Nf7+-) 42...Kf7 43.Qg6 Ke7 44.Qg7 Kd8 (44...Nf7 45.Ng6 Kd8 46.Nh8 Nh8 47.Qh8 Qe8 48.Qe8 Ke8 49.Kf2+-) 45.Qf6 Qe7 (45...Kc8 46.Ne6 Ne8 47.Qf5+-) 46.Ne6 Kd7 (46...Ke8 47.Qe5 Kd7 48.Nc5 Ke8 49.f4 Qe5 50.de5+-) 47.Nc5 Ke8 48.Qg6 Nf7 49.Qg8 Qf8 50.Qf8 Kf8 51.Nb7 Ke7 52.Kf2 Kd7 53.Nc5 (53.Nc5 Kd6 54.g4+-) 1–0. Pcmvr – Garethh, playchess.de, 2005.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 (9...Bd6 10.f4=+) 10.bc6 (10.Bf6 Qf6 11.Nbc3 Bd6=+) 10...Nc6 (10...bc6 11.0-0=+) 11.0-0= Qa5 (11...Bc5 12.Nf4=) 12.Bb2 (12.Bf6 gf6 13.Nbc3 Rg8=) 12...Be7=+ 13.d3 (13.Nf4 0-0=+) 13...0-0 14.Nbc3 (14.Nd2 b5=+) 14...b5 15.Qa1 (15.Nc1 Rb8=+) 15...b4 (15...Qb6 16.Ng3=+) 16.Qa5 Na5 17.Nb1 (17.Nb5 Rc8 18.Ned4 Nc6=+) 17...b3 (17...Ra8 18.Nd2=+) 18.cb3 (18.Rc1 Nd7=) 18...Nb3 19.e4 (19.Nd4 Nd4 20.Bd4 Rc8=) 19...Rc8=+ 20.Nd4 (better 20.Bf6 Bf6 21.ed5 ed5 22.Na3=+) 20...Rc1?? (better 20...Nc5 21.Rd1 de4 22.de4 Nce4-/+) 21.Bc1?? (better 21.Nb3 Rc2 22.Bf6 Bf6 23.Rc1 Rc1 24.Nc1+-) 21...Nd4+- 22.Be3 (22.Re1 Kf8+-) 22...Nc2 (22...Ne2 23.Kh1 de4 24.de4 Ne4 25.Re1+-) 23.Bd2 (23.e5 Ng4 24.Ba7 Nb4+-) 23...de4 24.de4 Ne4 25.Bf4 (25.Rc1 Nd2 26.Nd2 Nd4 27.Rc8 Bf8+-) 25...g6 (25...Nd4 26.f3 Ne2 27.Kh1 Nf4 28.fe4+=) 26.Rd1 (26.Rc1 Nb4+=) 26...Bc5= 27.Rf1 Nb4 (27...Be7 28.Rc1 Nd4 29.Kf1+-) 28.Be3 (28.Nd2 Nc3 29.Be5 Ne2 30.Kh1 Nd3+=) 28...Be3= 29.fe3 Nd3 (29...f5 30.Na3=) 30.Rd1+= Ne5 31.Nd2 Nf6 (31...Nd2 32.Rd2 f5 33.e4+=) 32.Nf3 (32.e4 Kf8+-) 32...Neg4 (better 32...Nc4 33.Rd8 Kg7+=) 33.Ng5 (better 33.Rd3!?+-) 33...h6 34.Rd8 Kg7 35.Nf3 Ne3 36.Ne5 Neg4 ½–½. valpa – schnitzly, playchess.de, 2003.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Bd6 10.Bf6 Qf6 11.Nbc3=+.

6.b5 a6 7.a4 Nbd7 8.0-0 Bd6 9.g3 (9.Nbc3 0-0=+) 9...0-0 10.d3 c6 11.bc6 bc6 12.Nd2 e5 13.d4 e4 14.f3 ef3 15.Rf3 Rb8 16.Ba3 Ba3 17.Ra3 Re8 18.Rb3 (18.c4 Qe7 19.c5 Rb2=+) 18...Qa5-/+ 19.Rb8 (19.Ra3 c5-/+) 19...Rb8 20.c3 Nb6 21.e4 (21.c4 Qa4 22.Qb1 dc4-+) 21...Qa4 (21...Ne4!? 22.Ne4 de4 23.Re3 Na4 24.Qc2-+) 22.Qf1 Qc2 23.Qe1?? (better is 23.e5 Nfd7 24.Qc1 Qc1 25.Nc1-+) 23...Nc4 (23...de4?! 24.Rf1-+; 23...Ne4?! 24.Ne4 Qe4 25.Qf1-+) 24.Nc4 Rb1 (25.Qb1 Qb1 26.Rf1 Qe4-+; 24...dc4 25.Rf6 Rb1 26.Rf1 Re1 27.Re1-+) 0–1. Hasler,Ueli – Proell,Helmut (1825), CiF, 2006.

6.b5 a6 7.ba6 Na6 8.0-0 Bd6 9.c4 0-0 10.d3 dc4 11.dc4 Ng4 12.Nf4 Qg5 13.h3 Nf6 (13...Bf4? 14.ef4 Qf4 15.Qg4 Qg4 16.hg4+-) 14.Qf3 Nc5 15.Nc3 Be5 16.Rfd1 Qf5 17.g4 Qg5 18.Nfe2 (18.Nd3 Nfd7=+) 18...h5 (18...b6!?-/+) 19.Qg2=+ Bc3 20.Bc3 hg4 21.Bf6 Qf6 (22.Qg4 Rfd8=+). Fischer,D – Cody,P, corr SOK–90–64, 1990.

6.b5 c6 7.a4 a6 (7...Bd6 8.0-0=) 8.Nbc3 ab5 9.ab5 Nbd7 10.bc6 (10.Ra8 Qa8 11.0-0 Bd6=) 10...bc6 11.Nd4 Qc8 12.0-0 Bd6 13.Qe2 (13.Ra8 Qa8 14.Qa1 Qc8=) 13...0-0 (13...Ra1 14.Ra1 Bh2 15.Kh2+-) 14.Ra8= Qa8 15.Ra1 (15.f4 c5 16.Ncb5 cd4 17.Nd6 de3 18.de3 Qc6=+) 15...Qb7 (15...Qb8 16.Rb1=+) 16.Nb3 Ra8 17.Qf1 Bc7 (17...Ra1 18.Qa1 e5 19.Qa5=+) 18.Qc1 (18.Ra8 Qa8 19.f4 c5=) 18...Qb8 19.h3 h6 (better is 19...Ra1 20.Qa1 c5=+) 20.Na5?? (20.Ra8 Qa8 21.d3=) 20...Ne4 (better is 20...Ba5 21.Rb1 e5-+) 21.d3 (21.Nc6 Ra1 22.Ba1 Bh2 23.Kf1 Qd6 24.Ne4 Qc6=) 21...Bh2 (21...Ba5!? 22.de4 Bc3 23.Ra8 Qa8 24.Bc3 Qa2=) 22.Kf1= Ng5 (22...Qc7 A) < 23.Ne4 Ra5 (< 23...de4 24.Nc4 Ra1 25.Qa1+=) 24.Ra5 Qa5=+; B) 23.de4 Ra5 24.Ra5 Qa5 25.g3+/–) 23.f4 Nh7 24.Qe1?? g5 25.g3?? e5?? 26.Qf2?? ef4 27.gf4?? gf4 28.Qh2?? Ne5 29.Qf4 f6?? 30.Qf5 Qc8?? 31.Qc8+- Rc8 32.Nb7 Kf8 33.Nc5 Kf7 34.Ra7 Kg6 35.Ne6 Ng5 36.Rg7 Kf5 37.Nd4 1–0. Zylla,Johannes – Huebscher, BS–Stadtm., 1991.

6.b5 Bd6 7.f4 Nbd7 8.0-0 0-0 9.d3 Ng4 10.Qd2 Qh4 11.h3 Nh6 12.Nd4 e5 13.Nf3 Qe7 14.fe5 Ne5 (worse is 14...Be5 15.Ne5 Ne5 16.Ba3+-) 15.Nc3 Nf5 (better is 15...Nf3 16.Rf3 Qe5+=) 16.Nd5+/– Nf3 17.Rf3 (worse is 17.gf3 Qg5 18.Qg2 Qg2 19.Kg2 c6 20.Nf6 gf6-/+) 17...Qg5 18.Raf1?? (better is 18.Qc3 Nh4 19.Rf2+=) 18...Nh4 19.Nf4 Nf3 20.Rf3 Qb5 21.Qc3 f6 22.Ba3 Ba3 23.Qa3 Qb1 24.Rf1 Qc2 25.Ne6 Rfe8 26.Rc1? (26.Nd4 Qd2 27.Nf5-+) 26...Qd2 27.Nc7 Qe3 28.Kh1 Rac8 29.Qb3 Kh8 30.Qc3 Qg3 31.Qa5 Rc7! 32.Rc7?? Re1 33.Qe1 Qe1 34.Kh2 Qe5 35.Kh1 Qc7 (35...Qc7 36.Kg1 Qc1 37.Kh2 Qf4 38.Kg1 Qd4 39.Kh2 Qd3-+) 0–1. Jostov,Keylah – Couspeyre,Thierry, OP–2011–0-01530, 2011.

5.a3 e6 6.Nf3 Bg4 7.Ne5 Be2 8.Qe2 Nbd7 =.

6.a3 a5 7.b5 Bg4 8.0-0 Bd6 =.

6.a3 Nbd7 7.c4 a5 8.Qb3 Bd6 (8...dc4 9.Bc4 Nb6 10.Be2=+) 9.d4 (better 9.c5 Be7 10.Nc3=) 9...dc4-/+ 10.Bc4 a4 11.Qd1 0-0 12.Nc3 c6 13.Bd3 (13.Na4?? b5 14.Bb3 ba4 (14...Ra4?! 15.Ba4 ba4 16.Qa4-+) 15.Ba4 Be4-+) 13...Bd3 14.Qd3 b5 15.Rc1 Rc8 16.0-0 Nb6 17.e4 Be7 18.Rfd1 Nc4 19.Qe2 White plans e5 19...Nd7 20.d5 Bf6 (20...ed5 21.ed5 cd5 22.Nd5 Bd6+=) 21.e5?? (better 21.de6!? fe6 22.Na4+/-) 21...Nde5 22.de6 (better 22.Ne5 Nb2 23.Nf7 (worse 23.Qb2 Be5 24.dc6 Qf6=; 23.Nc6? Nd1 24.Rd1 Qd7-/+) 23...Rf7 24.de6 Nd1 25.ef7 Kf7 26.Rd1=) 22...Nf3-/+ 23.Qf3 Nb2?? (23...Qe8 24.Ba1 Qe6=+) 24.Rd8+- Rfd8 25.ef7 Kf7 26.Ne4 Rd3 (26...Nd3 27.Rc3 Nf4+-) 27.Qf5 Rcd8 (27...Re8 28.Ng5 (worse 28.Nf6 gf6 29.h4 Re6+-) 28...Kf8 29.Nh7 Kf7 30.Nf6 gf6 31.h4+-) 28.Ng5 Ke7 (28...Kf8 29.Ne6 Kf7+-) 29.Qe6 (29.Qe6 Kf8 30.Nh7) 1-0. norba94 (2200) - Germain_1 (2155), Rated Blitz game, lichess.org, 2015.

6.a3 Be7 7.0-0 c6 8.c4 (8.Nh4 Bg6+=) 8...0-0 (8...dc4 9.Bc4 b5 10.Be2=) 9.d4 (9.c5 b6=) 9...Nbd7 (9...dc4 10.Bc4 b5 11.Bd3=) 10.Nc3 (10.Nbd2 a5=) 10...Rc8 (10...dc4 11.Bc4 b5 12.Be2=) 11.Ne5 (11.c5 Ne4=) 11...Ne5 12.de5 Ne4 (12...Nd7 13.cd5 cd5 14.Nb5=) 13.Ne4 Be4 14.Rc1 (14.f3 Bf5=) 14...Bh4 (14...dc4 15.Rc4 Bd5 16.Rc1=) 15.f3 Bf5 16.Qd4 (16.Bd3 Bd3 17.Qd3 a5=) 16...Qg5 (16...a6 17.Rfd1=) 17.f4 (17.Kh1 Qh6 18.Kg1 a6=) 17...Qh6 (17...Qg6 18.cd5 cd5 19.Qa7=) 18.Qa7 Qg6 (18...Rb8 19.Qb6+/–) 19.Qb7 (19.cd5 Ra8 20.Qb7 cd5 21.Qc7+/–) 19...Bh3? (better is 19...Be4!? 20.Bf3 Bd3+/–) 20.Bf3+- Bf5 21.cd5 Be4? 22.dc6 Bf3 23.Rf3 Qd3 24.g3 Qe2 25.Rf2 (25.Rf2 Qg4 26.Rg2+-; 25.gh4?! Qf3 26.Bd4 Qg4 27.Kf1 Qh3 28.Ke2 Qh2 29.Kd3 Ra8+=) 1–0. Wall,Bill – Totana, internet, 2003.

6.b5 a6 7.Nh4 Be4 8.f3 Nfd7 =.

6.b5 Bd6 7.c4 (7.Nh4 Be4 8.d3 Bg6=) 7...dc4 (7...0-0 8.0-0 dc4+=) 8.Bc4 0-0 (8...a6+=) 9.Nd4 Be5 10.Qb3 Bd4 11.Bd4 Nbd7 12.0-0 Nb6 (12...e5 13.Bc3 Nc5 14.Qa3=) 13.Be2= Be4 14.Qb2 Na4 15.Qb4 Nb6 16.Nc3 Nfd5 17.Qb2 (17.Qc5 Nc3 18.dc3 Nd7+=) 17...Nc3 (17...Nf4 18.f3 Ne2 19.Ne2=) 18.Qc3+= Nd5 19.Qb2 f6 20.f3 Bg6 21.e4 Nf4 22.Bc4 Bf7 23.Be3 e5 24.Rac1 Bc4 25.Rc4 Ne6 26.Rfc1 Rf7 27.Qb3 b6 (27...Qd6!?+=) 28.Rc6+/– Nd4 29.Bd4 Qd4 30.Kf1 Rd8 31.Rc7 Qd3 32.Qd3 Rd3 33.Rf7 Kf7 34.Rc7 Kg6 35.Ra7 Rd2 36.Ra6 Rb2 37.a4 Rb4 38.Ke2 h5 39.h4 Rb2 40.Kf1 Rb1 41.Kf2 Rb2 42.Kg3 Rb4 43.Kh3 Kf7 44.g4 hg4 45.Kg4 g6 46.h5 f5 (46...gh5 47.Kh5 Rd4+-) 47.Kg5 fe4 (47...gh5 48.Kf5 h4+-) 48.hg6 Kg7 (48...Ke7 49.g7 Rb2+-) 49.Ra7 (49.Rb6?! ef3 50.Rb7 Kg8+/–) 49...Kg8 50.Kf6 Ra4 51.Ra4 ef3 52.Ra8 1–0. purplegadge (1745) – danielcraciun (1725), gameknot.com, 2014.

6.b5 Nbd7 7.c4 Bb4 (7...dc4 8.Bc4 Bd6 9.0-0=) 8.cd5= ed5 9.Qb3 (9.Nc3 Qe7=) 9...Ba5 (9...Bd6 10.d3=) 10.Nc3 Be6 11.Nd4 Bb6 12.Ne6 fe6 13.a4 (13.d4 0-0+=) 13...Qe7 (13...c5 14.bc6 bc6 15.Qc2=) 14.d4+= 0-0? (better 14...Ba5+=) 15.Ba3+- Qf7? (15...Bc5 16.dc5 Nc5+-) 16.Bf8 Rf8 17.a5 Nh5 (17...Bd4 18.ed4 e5 19.de5 Ne5 20.Rd1+-) 18.0-0 Ndf6 (18...Bd4 19.Bh5 Qh5 20.ed4+-) 19.Bh5 (19.ab6!? ab6 20.Ra7 h6+-) 19...Qh5 20.ab6 Ng4 (20...ab6 21.Ra7 Rb8+-) 21.h3 Rf6 (21...ab6 22.hg4 Qg6+-) 22.ba7 Rh6 23.a8Q Kf7 24.Qb4 (24.Qb7 Qg5 25.Qc7 Qe7 26.Qe7 Ke7 27.Qb4 Kf7 28.Ra7 Kg6 29.Qf8 Kh5 30.hg4 Kg5 31.Rg7 Rg6 32.Qf4 Kh4 33.Rh7 Rh6 34.Rh6) 24...Kg6 25.Qe8 (25.Qe8 Kg5 26.Qbe7 Nf6 27.Qg7 Qg6 28.Qeg6 Rg6 29.Qc7+-) 1–0. GuestQFZJ – GuestNZKY, freechess.org, 2017.

5.f3 Bh5 6.Nf4 e5 7.Nh5 Nh5 8.Bb5? (better is 8.g3 Bb4 9.f4+=) 8...c6-+ 9.Bd3 Qh4 10.Ke2 e4 11.fe4 de4 12.Bc4 Bd6 13.Qf1 0-0 14.Kd1 Bb4 15.Nc3 Qe7 (15...Ndf6 16.a3 Bc5 17.Be2-+) 16.Ne2? (16.a3!? Bc3 17.Bc3-/+) 16...Ne5 (16...Bd2 17.Kd2 Qb4 18.Kc1 Qc4 19.Nd4-+) 17.Bb3 (17.Be5 Qe5 18.c3 Bd6-+) 17...Rad8 18.Bc3 Bc3 19.Nc3 Nf6 20.a4 c5 21.Kc1 Rd7 22.Qe2 Rfd8 23.Rd1 Rc8 24.Bc4 Nc6 25.Bb5 a6 26.Bc6 Rc6 (26...bc6?! 27.Qa6 Rdd8 28.a5+=) 27.Qc4 Qe6 (better is 27...Rb6!?-+) 28.Qe6-/+ Re6 29.a5 Nd5 30.Nd5 Rd5 31.Rb1 Re7 32.c4 Rd3 33.Kc2 Red7 34.Rb6 Ra3 35.Rdb1 Ra2 36.R6b2 Rb2 37.Rb2 f6 38.Rb3 Kf7 39.d3? (better is 39.Rb6-/+) 39...ed3-+ 40.Rd3? (40.Kd2-+) 40...Rd3 41.Kd3 Ke6 42.Ke4 Kd6 43.h4 (43.Kd3 h5-+) 43...Kc6 44.h5 (44.Kd3-+) 44...b6 45.ab6 Kb6 46.g4 (46.Kd3 Ka5 47.Kc3 Ka4-+) 46...a5 (better is 46...Kc6 47.Kd3 Kd6 48.Ke4-+) 47.Kd3 a4 48.e4 (48.Kc2-+) 48...Ka5 49.g5 h6 50.gh6 gh6 51.Kc3 a3 52.Kb3 a2! 53.Kb2 (53.Ka2 Kb4 Combination) 53...Kb4 54.Ka2 Kc4 55.Kb2 Kd4 56.Kb3 (56.e5 Ke5 57.Kc3 f5 58.Kc2 Ke4 59.Kd2 c4 60.Kd1 Ke3 61.Kc2 f4 62.Kc3 f3 63.Kb4 f2 64.Ka4 f1Q 65.Kb5 c3 66.Kb6 c2 67.Kc5 Qa6 68.Kd5 c1Q 69.Ke5 Qc5) 56...Ke4 57.Kc4 (57.Kc3 f5 58.Kc4 f4 59.Kb5 f3 60.Kc6 c4 61.Kd6 f2 62.Ke6 c3 63.Kd6 f1Q 64.Kc5 c2 65.Kd6 c1Q 66.Ke6 Qc6 67.Ke7 Qff6) 57...f5 58.Kc5 (58.Kc3 f4 59.Kb3 f3 60.Kc4 f2 61.Kb5 f1Q 62.Kc6 c4 63.Kb6 c3 64.Kc6 c2 65.Kc5 Qa6 66.Kb4 c1Q 67.Kb3 Qac4) 58...f4 0–1. Skaloud,Dusan (1950) – Fang,Andy (1795), 26th Czech Rapid G1, 2015.

5.h3 Bf5 6.Nd4 (6.Ng3 Bg6=) 6...Bg6=+ 7.Nf3 e6 8.a3 Be7 9.g4 (9.Be2 0-0=+) 9...0-0-/+ 10.Rg1 Ne4 (10...a5 11.b5-/+) 11.d3=+ Bf6 12.c3 Nd6 13.Be2 (13.g5 Be7=+) 13...c5 14.h4 (14.Nbd2 b5=+) 14...c4-/+ (< 14...Bh4 15.g5 Nf5 16.e4 de4 17.de4+=) 15.h5 (15.g5 cd3 16.Bd3 Bd3 17.gf6 Qf6 18.Qd3 Qf3=+) 15...Bd3 16.Bd3 cd3 17.g5 Be7 18.Qd3 (18.h6 g6-/+) 18...Nc4 19.Qc2 e5 (19...Bd6 20.Nbd2 Ndb6 21.e4-/+) 20.Nbd2 (20.h6 g6 21.Nbd2 Ndb6-/+) 20...Nb2 21.Qb2 e4 22.c4 ef3 23.h6 f6 24.cd5 Ne5 25.Qd4 Qb6?? 26.Qe4?? Qb5 27.Nf3 Nf3 28.Qf3 fg5 29.Qe4 Bf6 30.Qe6 Rf7 31.Rc1 gh6 32.Rg4 Re8 33.Rc8 Rc8 34.Qc8 Kg7 0–1. Schmidt,Horst Hubert – Bohn,Thomas (2360), Oberliga Sued W, 1996.

5.a3 e6 6.f4 Nbd7 7.Nf3 c5 8.bc5 Bc5 =.

5.c4 Qd6 6.cd5 Nd5 7.a3 e5 8.e4 Nf6 9.d4 ed4 10.Bd4 Be7 11.Bc4 0-0?? (better is 11...Nc6 12.Ne2 0-0=) 12.Bf7?? (better is 12.e5 Qc6 13.ef6 Bf6 14.Bf6 Re8 15.Ne2 Qc4 16.Nd2+-) 12...Rf7-+ 13.Ne2 b6?? (13...Nc6 14.Nbc3-+) 14.0-0?? (14.e5!? Qe6 15.ef6 Bf6 16.Bf6 Qf6 17.Nbc3=) 14...c5?? (better is 14...Nbd7-+) 15.e5=+ Qd4?? (better is 15...Qc7 16.ef6 Bd6=) 16.Nd4+- 1–0. chevin – Hemi, Live Game Caissa's Web, 2004.

5.f4 e6 6.a3 a5 7.b5 Ne4 8.Nf3 Nd7 =.

5.a3 e6 6.Ne2 Bd6 7.Nd4 Bg6 8.Nb5 e5 =.

5.Ne2 Nbd7 6.Ng3 (6.g4 Bg6=) 6...Bg6=+ 7.c4 c6 (7...e5 8.b5=+) 8.cd5= cd5 9.Be2 h5 (9...e5 10.Qa4 Bd6 11.Nc3=+) 10.0-0= h4 11.Nh1 e6 12.a3 Bd6 13.Nc3 a6 14.Rc1 Nh5 (14...d4 15.ed4 Qb8 16.h3=+) 15.f4 Nhf6 16.Nf2 Bf5 17.Bf3 Nb6 18.Na4 (18.e4!? de4 19.Nce4 Bf4 20.Nf6 gf6 21.Bb7 Bh2 22.Kh1+=) 18...Nc4= 19.Rc4 dc4 20.Bb7 Ra7 21.Bc6 Nd7? (21...Kf8 22.Bd4 Re7 23.Nc5=) 22.Bd4 (22.Bg7!? Rg8 23.Bd4+-) 22...Rc7 23.Bb6 (< 23.Bg7 Rg8 24.Bd7 Rd7-/+ (< 24...Kd7 25.Be5+=)) 23...Ke7 (23...0-0 24.Bc7 Qc7 25.Bd7 Qd7 26.Nb2+/–) 24.Bc7 Bc7 (24...Qc7 25.Be4+/–) 25.Qe2 Bc2 (25...Nb8 26.Qc4 Qd2+-) 26.Nb2 Bb3 27.Nc4 Nb8 28.Bf3 Qd7 (28...g5 29.fg5 Bh2 30.Kh2 Qc7 31.Kg1 Qc4 32.d3+-) 29.d4 (29.Rc1 Rc8+-) 29...a5 (29...Qb5 30.Rc1 Rc8 31.Qd3+-) 30.Ne4 (30.Na5 Ba5 31.ba5 Rc8+-) 30...ab4 31.ab4 Bf4 (31...Qb5 32.Rc1 f5+-) 32.Nc5 (better is 32.ef4 Qd4 33.Ne3 Qb4 34.Qb2+-) 32...Bc4= 33.Qc4 Be3 34.Kh1 Qd4 35.Qb5 ½–½. Otte,Marco – Dodeman,Bartel, Wag.Intcomp, 1996.

5.f4 e6 6.a3 c5 7.bc5 Bc5 8.Nf3 Nbd7 9.Be2 Qb6 (9...0-0 10.0-0=+) 10.Bd4 (10.Ra2 0-0=) 10...Rc8 (10...Ne4 11.Ra2=+) 11.0-0 (11.Nc3 Qa5=) 11...Bg4 12.Bc5 Qc5 13.Nd4 Be2 14.Qe2 0-0 (14...Nb6 15.Nc3=) 15.a4 (15.Nc3 Nb6=) 15...Ne4 16.a5 a6 (16...Ndf6 17.a6=) 17.Ra4 (17.d3 Nd6=) 17...Rfe8 (17...Nd6 18.d3=+) 18.Na3 (18.d3 Nd6=) 18...f6 (18...Qd6 19.c3=+) 19.Nb3 (19.c4 Qc7=+) 19...Qe7 20.Nd4 (20.Rb1 Qd6=) 20...g6 (20...Qd8 21.Nb1-/+) 21.Rb1 (21.c3 Nec5 22.Rb4 Qd8=+) 21...e5 (21...Qd8 22.Nb3 Ndc5 23.Nc5 Nc5-/+ (23...Rc5?! 24.Rb7 Ra5 25.Ra5 Qa5 26.Nb1=)) 22.fe5=+ fe5 23.Nf3 (23.Nb3 Rf8 24.c4 dc4 25.Nc4 Qe6=+) 23...Ndc5 (23...Qd8 24.c4 Ndc5 25.Rab4 Qa5 26.Nc2-/+) 24.Rab4=+ Nd6 (24...Qc7 25.Rb6=+) 25.c4 e4 26.Ne1 Qd8 27.cd5 Qa5 28.Nc4 Nc4 29.Rc4 b5 (29...Rcd8 30.d4 ed3 31.Nd3 Rd5 32.Nc5 Rc5 33.Rc5 Qc5 34.Qa2 Kh8 35.Qa1 Qe5 36.Qe5 Re5 37.Rb7 Re3 38.Kf2-/+) 30.Rd4 Red8 (30...Qa2!? 31.Rc1 Red8=+) 31.d3= ed3 (31...Nb3 32.Rb3 Rc1 33.Rdb4=+) 32.Nd3+= Nd3 33.Qd3 Rc3 (33...Qa2 34.Rf1=) 34.Qe4 Qc7 35.Qe6 Kg7 36.Rf1 Rc1 37.Rdf4 (37.Qf6!? Kg8 38.Qd8 (38.Qa6 Rf1 39.Kf1 Rf8 40.Rf4 Rf4 41.ef4 Qf4 42.Ke2 Qe4 43.Kf1 Qd3 44.Kf2 Qd5-/+) 38...Qd8 39.Rc1+-) 37...Rf1= 38.Rf1 Qd7 (38...a5 39.e4=) 39.Qe5 (39.Qf6 Kg8+=) 39...Kg8 40.Rd1 (40.e4 Re8 41.Qd4 a5+=) 40...Qd6 (40...Re8 41.Qf4=) 41.Qd4 (41.Qd6 Rd6 42.e4 Kf7+=) 41...b4 (41...Re8 42.e4=) 42.e4 Re8 43.Rc1 (43.Re1 b3=) 43...Qe5 (43...a5 44.Re1 Qe5 45.Qc5=) 44.Qb4+= ½–½. Jamieson,Ian (2000) – Bass,John (2085), Paington op, 2009.

5.g4= Bc8 6.c4 =.

5.g4= Bd7 6.g5 Ng8 7.f4 (7.a3 e6 8.f4 h6=) 7...Nc6 (7...e5 8.fe5 Qg5 9.Nf3=) 8.a3 e6 9.Bd3 (9.Nf3 Nge7=) 9...Nge7 10.Nf3 Rc8 (10...h6 11.Nc3=) 11.Nc3+= Ng6 (11...a6 12.Rb1=) 12.Ne2 (12.h4 Nge7+=) 12...Nce7 (12...a5 13.Ned4=) 13.Ng3 a5 (13...c5 14.bc5 Rc5 15.h4+=) 14.ba5 Ra8 15.Nh5 (15.h4 h5+=) 15...Rg8 16.h4 (16.Bc3 Ra7+=) 16...Ra5 (16...c5 17.Ng3 c4 18.Be2+=) 17.Ng3+= Nf5 18.Nf5 (18.Bf5 ef5 19.h5 Ne7+=) 18...ef5 19.h5 Nh8 (19...Ne7 20.Ne5+=) 20.Nd4 Qc8 (20...h6 21.gh6 gh6 22.Qf3+/–) 21.Qf3 Be6 22.0-0 c5 23.Nb3 Ra8+= 24.Bb5 (White gets the initiative) 24...Bd7 25.a4+/– Bb5 26.ab5 Ra1 27.Ra1 Qd8 28.c4 f6 29.Na5 Qd7 30.Qd5+- Qd5 31.cd5 b6 32.Nc6 Nf7 33.Ra8 Kd7 34.gf6 gf6 35.Kf1 Nd6 36.Rd8 Kc7 37.Bf6 Bg7 38.Rg8 Bf6 39.d3 (39...c4 40.dc4 Nc4 41.Ke2+-) 1–0. Woschkat,Karl_Heinz – Denzin, corr ICCF EU–I–GT–304, 1993.

5.g4 Bg6 6.a3 Qd6 7.c4 dc4 8.Bc4 Nc6 =.

5.g4 Bg6 6.h4 e5?? 7.h5+- Bh5 8.gh5 (8.Rh5? Nh5 9.Qe2 Nf6 10.Be5 Nc6-+) 8...Nc6 (better 8...Bb4 9.Be5 0-0+-) 9.b5 Nb4 (9...Na5 10.Be5 Bd6+-) 10.a3 (worse 10.Be5 Qd7 11.d4 Qf5+-) 10...d4 (10...Nc2 11.Qc2 Bd6 12.Nc3+-) 11.ab4 Qd6 (11...de3 12.Qe2 ed2 13.Nd2 Bb4 14.Qe5 Kf8 15.Bd3+-) 12.Bd3 (12.ed4 ed4 13.Qe2 Be7+-) 12...Qb4 (12...de3 13.de3 e4 14.Bf1 Qg3 15.Ke2 ef3 16.Nf3+-) 13.Ba3 h6 (13...Qa5 14.Bf8 Qa1 15.Bg7 Ke7 16.ed4 Qd4+-) 14.Bb4 c5 15.bc6! b6 (15...bc6 16.Bf8 Combination) 16.Bf8 Kf8 17.Qc1 (17.ed4 ed4 18.c7 Rc8 19.Ra7 Ne8+-) 17...a5 18.Qa3 Ke8 19.Qd6 (19.Bb5 Rc8 20.Qd6 Rc7 21.Qc7 de3 22.Qd6 ed2 23.Nd2 Nd7 24.Qd7 Kf8 25.Qd8) 19...e4 20.Bb5 Nd7 21.c7 f6 (21...f5 22.Qd7 Kf8 23.Bc4 de3 24.Qf7) 22.Qd7 Kf8 23.c8Q (23.Bc4 de3 24.Qf7) 23...Rc8 24.Qc8 Ke7 (24...Kf7 25.Qd7 Kg8 26.Bc4 Kh7 27.Qf5 g6 28.Qg6) 25.Qh8 (25.Qd7 Kf8 26.Qe8) 25...Ke6 (25...g5 26.Qe8 Kd6 27.Qd7 Kc5 28.ed4 Kb4 29.Ra4) 26.Qe8 Kf5 (26...Kd6 27.Qd7 Kc5 28.ed4 Kb4 29.Ra4) 27.Qe4 Kg5 28.Qg4 (28.Qg6) 1–0. FeegLood (2235) – lichess AI level 1, lichess.org, 2016.

5.g4 Bg6 6.h4 h5 7.g5 Ng8 (7...Nfd7 8.f4= (8.a3 e5 9.Bg2 f6 10.f4 c6 11.Ne2 Bd6 12.0-0 fg5 13.fg5 Nb6 14.Ng3+=; 8.Nc3 e6 9.a3 Bd6 10.f4 a5 11.Nb5 Bf8 12.ba5 c6 13.Nd4 Ra5 14.Ngf3=) 8...e5 9.fe5 Nc6 10.Nf3 Nb4 11.d3 Bc5 12.e6 fe6 13.Bg7 Rh7 14.Bd4=) 8.Ne2 (8.Nh3 Qd6 9.Nf4 Bf5 10.Bd3 Bd3 11.Nd3 Nc6 12.b5 Na5 13.Be5 Qd7 14.Nc3=) 8...e6 (8...e5 9.Be5 Nc6 10.Bf4 Nb4 11.d3 Bd6 12.Nbc3 Ne7 13.Rb1 Rb8 14.Nb5=) 9.Nf4 Bf5 10.c4 (10.a3 Ne7 11.Nc3 e5 12.Nd3 Nbc6 13.e4 de4 14.fe4+=) 10...Ne7 (worse is 10...Bb4 11.cd5 ed5 12.Qb3+/– Bd6 13.Bg7 Rh7 14.Qb7+=) 11.Nc3 (11.Rg1 Nd7 12.a3 a5 13.b5 Nb6 14.c5=) 11...c6 (11...d4 12.Ne4 e5 13.Nd3 Ng6 14.ed4+=) 12.cd5 (12.e4 de4 13.fe4 Bg4 14.Be2=) 12...cd5 (12...Nd5 13.Ncd5 ed5 14.Bh3=) 13.Rc1 (13.e4 Qd6 14.Nfd5=) 13...a6 (13...e5 14.Nd3=) 14.b5 (14.e4+=) 14...Nd7 15.ba6 ba6 16.Qa4 Nc8 17.Nd1 (17.e4 Ncb6 18.Qc2 de4 19.fe4 Bg4=) 17...Ncb6 18.Qb3 Qb8 (18...Nc5 19.Rc5 Bc5 20.Bg7+=) 19.Bd4 Qd6 20.a4 e5 21.Bb6 Nb6 (21...Qb6? 22.Qd5 Rb8 23.Bc4+-; worse is 21...ef4 22.Bd4+=) 22.a5 ef4 23.ab6 Rb8 24.b7 Bd7 25.ef4 Be7 26.Ne3 d4= 27.Nd5 0-0 28.Bd3 Bb5 29.Bb5 Rb7 30.Rc6 Qb8 31.Ra6 Re8 32.Ne7 Ree7= 33.Kf2 Rb5 34.Qa4 Qb7 35.Rc1 d3+= 36.Kg3 Rb1 37.Rac6 Rc1 38.Rc1 Qd5 39.Qa6 Kh7 40.Rc3+/– Rd7 41.Qc6 Qc6 42.Rc6 Rb7 43.Rd6 Rb3 44.f5 Rb5 45.f6 Rb2 46.Rd7 gf6 47.Rf7 Kg8 48.Rf6 Rd2 49.f4 Re2 50.Kf3 Rh2 51.Ke3 Rh4 52.Kd3 Kg7 53.Ke4 Rh1 54.Rh6 h4 55.Kf3 h3 56.Kg3 1–0. Buczinski,Henryk – Deforel,Jorge Eduardo, corr IECG WC–2014–P–00024, 2010.

5.g4 Bg6 6.h4 h6 7.Ne2 e5 8.Be5 (8.b5 Nbd7=+) 8...Bb4 (8...Nc6 9.Bc3 Bb4 10.Nd4 Nd4 11.Bd4-/+) 9.Nf4 Bd6 (9...Nc6 10.Bb5 0-0 11.Bc3-/+) 10.Ng6 (10.Bd6 Qd6 11.Nc3 Nc6=+) 10...fg6 11.d4 (11.f4 Nc6 12.Bf6 Qf6=+ (12...gf6?! 13.Bd3+=)) 11...Qe7 (11...Nc6 12.Bb5-/+) 12.Bb5 (12.f4 0-0=+) 12...c6 (12...Nc6!? 13.Bd6 Qe3 14.Qe2 Qe2 15.Ke2 cd6-/+) 13.Bd6=+ Qd6 14.Be2 (14.Bd3 0-0 15.Qe2 c5 16.dc5 Qe5=+) 14...Kd8 (14...Nbd7 15.Nc3-/+) 15.Qd3 (15.c4 Kc7=) 15...Re8 16.Nc3 Nfd7 (better 16...Kc7!?=+) 17.Kf2+- Nb6 18.e4 Qf4 (18...Kc7 19.e5 Qe6 20.Qe3+-) 19.Qe3+- Qf7 20.e5 White prepares g5 20...N8d7 21.Kg3 h5 22.Bd3 Nf8 (22...Kc7 23.Qf4 Qf4 24.Kf4 Nf8+-) 23.Rhf1 (better 23.Ne2!?+-) 23...Ne6+= 24.g5 (24.a4 a5+=) 24...Nc8 (24...Kc7 25.Rab1=) 25.Rab1 Kc7 26.Ne2 Ne7 27.Rb3 Rf8 28.Rc1 (28.Rfb1 b6+=) 28...b5 29.a4 a6 (29...ba4 30.Rb4+=) 30.Rcb1+= Rab8 31.a5 (31.ab5 cb5 32.Kf2 Rfc8+=) 31...Rbc8 (31...c5 32.dc5 d4 33.Nd4 Nd4 34.Qd4 Qf3 35.Kh2=) 32.Rf1 Kd7 33.c3 Nf5 34.Bf5 Qf5 35.Rb2 Qf7 (35...Kc7 36.Kg2=) 36.Qd3 Nf4 37.Qe3 ½–½. Navratil,Josef (2050) – Tichy,Miroslav (2015), CZE–ChT2E, 2011.

6.a3 a5 =+.

6.a3 c6 7.d4 (7.cd5 ed5 (< 7...Qd5 8.e4 Ne4 9.fe4 Qe4 10.Qe2+=; 7...cd5?! 8.Bb5 Nbd7 9.d3=) 8.Ne2 Bd6=+) 7...Bd6 8.c5 Bc7 9.Bd3 Bg6 (9...Bd3 10.Qd3 Nfd7 11.Ne2=+) 10.Ne2= Nbd7 11.0-0 Nh5 (11...e5 12.Nbc3=) 12.g3 (12.b5 Bd3 13.Qd3 cb5 14.Qb5 Qb8=) 12...0-0 (12...Nhf6 13.Nbc3=) 13.Nbc3 e5 14.Rc1 (14.Bg6 fg6 15.e4 Ndf6+=) 14...Qe7 (14...Nhf6 15.Bg6 fg6 16.e4=) 15.Bg6 fg6 16.Qd3 (16.e4 Qe6=) 16...Qe6 17.Kg2 Rad8 18.Rf2 g5 (better is 18...Nhf6=) 19.h3 (19.e4 Qg6=) 19...e4 20.Ne4 (20.Qe4 de4) 20...de4-+ 21.Qe4 Qb3 22.Rc3?? (better is 22.Bc3-+) 22...Qb2 23.Qe6 Kh8 24.Qc4 Ndf6 25.g4 Nd5 26.gh5 Nc3 27.Qc3 Qc3 28.Nc3 Kg8 29.Ne4 Rfe8 30.Rf1 h6 31.Rd1 Re7 32.Rd3 Kf7 33.Nd2 g6 34.hg6 Kg6 35.Nc4 Red7 36.Kf2 h5 (37.a4 Re7-+; 36...Kh5 37.Nd2-+) 0–1. Marczyk,L – Gniazdowski,M, corr mem Chojecki A, 1996.

6.a3 Bd6 7.c5 Be7 8.Ne2 =+.

6.a3 Be7 =+.

6.c5 a5 7.a3 =+.

6.c5 Nbd7 7.d4 g5 (7...Be7 8.Ne2=+) 8.Bd3 (8.Ne2 g4=) 8...Bd3 9.Qd3 c6 (9...g4 10.fg4 Ng4 11.Nf3=) 10.Nd2 b5 (10...b6 11.Nh3=) 11.a4+= a6 (11...ba4 12.Qa6 Qc7 13.e4+=) 12.Ne2 Bg7 (12...g4 13.0-0+=) 13.0-0 (13.e4 ba4 14.Ra4 a5+/–) 13...0-0 (13...ba4 14.Ra4 a5 15.Rfa1+/–) 14.Ra3 Rc8 15.e4 Ne8 16.ab5 ab5 17.ed5 ed5 18.f4 g4+= 19.Ng3 Nef6 20.Nf5 Ra8 21.Ra8 Qa8 22.Ra1 Qd8 23.Re1 Re8 24.Re5 Ne5=+ (Black gets the initiative) 25.de5 Nh5= 26.Nd6 Rf8 27.Qf5 Qh4=+ 28.g3 Ng3 29.hg3 Qg3 30.Kf1 Bh6 31.e6 Qf4 32.Qf4 Bf4 33.e7 Bd2-+ 34.Ba3 Bg5 35.ef8Q Kf8 36.Nf5 Ke8 37.Kf2 Bf4 38.Nd4 Kd7 39.Ne2 Be5 40.Bc1 Ke6 41.Be3 h5 42.Bf4 d4 43.Bd2 Kd5 44.Nc1 Ke4 45.Ke2 f5 46.Nd3 f4 47.Nf2 Kf5 48.Kd3 h4 (49.Be1 h3-+) 0–1. Filipek,Jakub (2395) – Stryjecki,Marek (2275), Krynica op–A, 1998.

6.c5 Be7 7.Ne2 (7.g4 Bg6=+) 7...0-0 8.Ng3 Bg6 9.d4 Nbd7 (9...Nc6 10.a3=) 10.Nd2 (10.Nc3 b6=+) 10...Re8 (10...b6 11.Ba6 bc5 12.bc5=) 11.Nb3 Bf8 (11...Rb8 12.Bd3=) 12.Bd3 Bd3 13.Qd3 e5 14.0-0 e4 15.fe4 Ne4 (15...de4 16.Qc4=) 16.Ne4+= Re4 17.Nd2 Re6 18.Rae1 (18.e4 Qg5+=) 18...Qe7 19.Qf5 (19.e4!?+=) 19...Nf6 (19...Re3 20.Nf3 Nf6 21.Bc1=+) 20.e4 (20.Rf3 Re8=+) 20...g6 (20...de4 21.Re3=+) 21.Qf4 (21.Qf2 Ne4 22.Ne4 Re4 (22...de4 23.d5 e3 24.Qf7 Qf7 25.Rf7 Kf7 26.de6 Ke6 27.Re3 Kd5 28.Rd3 Kc4 29.Rd4 Kb5 30.a3=+) 23.Re4 de4=+) 21...Ne4 (21...de4!? 22.a3 Nd5-/+) 22.Ne4=+ Re4 (22...de4?? 23.d5 g5 24.Qf5+-) 23.Re4 de4 24.d5 f5 (24...a5!? 25.a3 f5=+) 25.g4= Bg7 26.Bg7 Qg7 27.gf5 Qd4 28.Qf2 e3 (< 28...Qb4 29.fg6 hg6 30.Kh1+/–) 29.Qe2 (29.Qf4 Qf4 30.Rf4 Rf8=) 29...Rf8 (29...Re8 30.fg6 hg6 31.Qd1=+) 30.fg6= Rf1 31.Kf1 hg6 32.d6 cd6 (32...Qe4 33.Kg1 cd6 34.cd6=+) 33.cd6 Qd6 (33...Qe4 34.Kg1=+) ½–½. Bothe,Michael – Mittendorf,Frank, Kassel op, 1999.

5.Bb5 c6 6.Be2 e5 =.

5.c4 e6 6.a3 Bg6 (6...a5) 7.Nh3 a5 8.ba5 Ra5 9.Qb3 b6 10.Nf4=.

5.c4 e6 6.Qa4 Qd7 7.Qd7 Nbd7 =+.

5.c4 e6 6.Qb3 Nc6 (6...Bg6 7.Nh3 Nbd7 8.Nf4 dc4 9.Bc4 Bd6 10.Ng6=) 7.a3 (7.cd5 Nd5 8.b5 Nb8 9.e4 Nb6 10.Ne2=) 7...a5 (7...Bg6 8.cd5 ed5 9.Bb5 Be7 10.Qc3=) 8.cd5 ed5 9.b5 Nb8 (9...a4 10.Qd1=) 10.Nc3 (10.Bf6=) 10...Bg6 11.Nh3 Bd6 12.Nf2 (12.Nd5? Nd5 13.e4 Nb6 14.Bg7 Rg8-+) 12...Be7 13.Rc1 0-0 14.Be2 Qd6 15.Na4 Nbd7 16.d4 Rfe8 17.0-0 Nf8 (17...Bd8 18.Nc5 Nc5 19.dc5= (worse 19.Rc5 a4 20.Qc3 Nd7-/+)) 18.Rfe1 (18.e4 Qd8+=) 18...Rac8 19.Nc5 b6 20.Ncd3 Qd8 21.Ne5 Bd6 22.Nc6 Qd7 23.Bd3 Bd3 24.Qd3 Ng6 25.g3 Ne7 26.e4 de4 27.fe4 (27.Ne4?! Nfd5=) 27...Ng4 28.e5 Nf2 29.Kf2 Qh3? (29...Nc6 30.ed6 Na7 31.Rc7 Rc7 32.Re8 (32.dc7?! Re1 33.Ke1 Qc7=) 32...Qe8 33.dc7+-) 30.Ne7 (better 30.ed6!? Qh2 31.Kf3 Qh5 32.Kg2 Nc6 33.d7 Qd5 34.Qf3 Qd7 35.Qc6 Qc6 36.bc6+- (36.Rc6?? Re1 37.Bc1 Re6-+)) 30...Be7+= (30...Re7? 31.Kg1 (31.ed6?! Qh2 32.Kf3 Re6+-) 31...Rce8 32.Qf1+-) 31.Kg1 Bg5 32.Rcd1 Rcd8 33.d5 Qg4 34.Re4 Qf5 35.Rf1 (35.g4 Qd7+=) 35...Qg6 (35...Qd7!? 36.h4 Be7=) 36.Rf3 Bh6 37.Kg2 Rd7 38.Qc4 Red8? (38...Rde7 39.h3+=) 39.Rd3 (39.e6 fe6 40.Re6+- (40.de6?! Re7+=)) 39...Kh8 (39...Bg5 40.Rg4 h5 41.Rgd4+=) 40.h3 (40.e6 fe6 41.Re6 Qh5+-) 40...Bg5+= 41.h4 White launches an attack 41...Bh6 42.g4 f5 The passed pawn on e5 will quickly become a dangerous weapon 43.Red4 fg4 White creates threats along the open f–file 44.e6 Re7 45.Rg4 Qf5 46.Rf3 Qh5 (46...Qd5?? 47.Qd5 Rg8 48.Rf7+-) 47.Qe4 Kg8 (better 47...Rg8+-) 48.Rf5 Qe8 49.a4 g6 50.Bf6 Bg7 51.Be7 gf5 (51...Qe7 52.Rf7 Qd6+-) 52.Rg7! Kg7 53.Qe5 Kg8 54.Qg3 (54.Qg3 Qg6 55.Bd8+-) 1–0. Franic,Milan – Petrov,Jole, Porec hr ch, 1994.

5.c4 e6 6.c5 Nbd7 7.Nh3 a5 8.a3 Bg6 9.Nf4 Nh5 10.Nh5=.

5.g4 Bg6 6.a3 Nc6 7.Bg2 e6 8.h4 h6 9.Ne2 (9.d3 Bd6=) 9...Bd6=+ 10.Nbc3 0-0 (10...a5 11.b5 Ne7 12.d3=) 11.Nb5 a6 (11...Ne8!?=) 12.Nd6+= Qd6 13.h5 (13.g5 Nh5+=) 13...Bh7 14.g5 hg5 15.h6 (better is 15.f4+=) 15...gh6?? (better is 15...e5=) 16.Bf6+- e5 (16...a5 17.b5 Ne5 18.Rh6+-) 17.Rh6 Qd7 (17...Ne7 18.Bg7! Kg7 19.Rd6 cd6+-) 18.Bh3 Qe8 (18...Qd6 19.Bf5! Rfe8 20.Bh7 Kf8+-) 19.Bf5! Bf5 (19...Bf5 20.Rh8) 20.Rh8 1–0. michaelbuss – I need chocolate, ChessWorld.net, 2005.

5.g4 Bg6 6.a3 e6 7.h4 h6 8.Ne2 c5 (8...Nbd7 9.Nf4=) 9.Nf4 (9.bc5 Bc5 10.Nf4 0-0=) 9...cb4 10.Ng6 fg6 11.Bd3 Kf7 12.f4 Ne4 13.h5 gh5 14.gh5 Rg8 (better is 14...ba3!? 15.Na3 Nd7=) 15.Qg4 Be7 16.Be4 de4 17.ab4 Nd7 (17...Bb4 18.Qg6 Kf8 19.Qe6+-) 18.Qg6+- Kf8 19.Qe4 Bf6 (19...Qb6 20.Bd4 Qc6 21.Qc6 (21.Ra7?? Qe4 22.Ra8 Kf7-+) 21...bc6 22.Ba7+-) 20.Bf6 Qf6 21.Nc3 (21.Qb7 Qa1 22.Qa8 Ke7 23.Qg8 Qb1 24.Ke2 Qh1 25.Qg7 Kd6 26.Qh6 Qe4+/–) 21...Qe7 22.Qb7 Rb8 (22...Kf7 23.Ra7 Ra7 24.Qa7+-) 23.Qc7 (23.Qa7?! Rb4 24.Ra6 Ke8+-) 23...Rb4 (23...a6 24.Ra6 Rb4 25.Ra7+-) 24.Ra7 (24.Qa7?! Kf7+-) 24...Ke8 25.f5! Qd8 (25...ef5 26.Qc8) 26.Qg3 (26...Nf8 27.f6 Qf6 28.Qc7+-; < 26.fe6 Qc7 27.Rc7 Nb6+-) 1–0. michaelbuss – grimstad, ChessWorld.net, 2005.

5.g4 Bg6 6.Nh3 Nfd7 7.f4 e6 8.Nf2 Qh4 9.Be2 f6 10.a3=+.

5.g4 Bg6 6.h4 h6 7.Nh3 Nbd7 8.Nf4 e5 9.Ng6 fg6 10.a3=.

5.Nh3 e6 6.Nf4 Nbd7 7.Be2 (worse is 7.Nh5 Nh5 8.Qe2 Qh4 9.Kd1 Qb4-/+) 7...Bg6 8.a3 Bd6 9.d4 Qe7 10.Nd2 e5 11.Ng6 hg6 (worse is 11...fg6 12.c4 ed4 13.Bd4=) 12.de5 Be5 13.Be5 Qe5 14.Nf1 a5 15.b5 0-0 16.Qd4 Qe7 17.Kf2 Nc5 18.Ng3 Rfe8 19.Rhe1 Rad8 20.Bd3 Qd6 21.Kg1 b6 22.Ne2 Ne6 23.Qc3 d4 24.ed4 Nd4 25.Ng3 Re5 26.Re5 Qe5 27.Qe1 Qc5 28.Qf2 Ne6 29.Ne2 Kf8 30.Qc5 Nc5 31.Rd1 Nd3 32.Rd3 Rd3 33.cd3 Ke7 34.Nc3 Kd6 35.d4 Nd5 36.Ne4 Ke7 37.g4 f5 38.gf5 gf5 39.Ng3 Nc3 40.Nf5 Kf6 41.Ne3 Nb5 42.Nc2 Kg5 (42...Ke6!?-+) 43.Kf2-/+ Kf4 44.Ke2 g6 45.Kf2 Nc3 46.Ne1 Nd5 47.Nd3 Kf5 48.Kg3 (48.h4 b5-/+) 48...b5 49.Kf2 b4 50.ab4 Nb4 51.Nc5 Nc2 52.d5 Nb4 53.Ke3 Nd5 54.Kd4 Nb6 55.Na6 Kf4 56.Nc7 Kf3 57.Kc5 a4 58.Kb6 a3 59.Nb5 a2 60.Nd4 Kg2 61.Nc2 Kh2 0–1. Linnanen,L (2175) – Pihlajasalo,H (2245), TCh–FIN, Finland FIN, 2009.

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3).

4.Nf3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4).

4.Nf3 c6 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.Nf3 c6 5.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2).

4.Nf3 c6 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.Nf3 Nc6 5.b5 Na5 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5 5.Nf3 Bg4).

4.Nf3 Nbd7 5.Be2 c6 6.0-0 e6 7.a3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7 7.0-0).

4.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 e6).

4.Nf3 e6 5.a3 Nbd7 6.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.a3).

4.Nf3 e6 5.b5 Nbd7 6.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.b5).

4.Na3 A) 4...g4 A1) 5.Ne2 Nbd7 (5...Rg8 6.Nf4 Nc6 7.Bf6 ef6 8.c3 Bh6 9.Bd3 a5; 5...Nc6 6.b5 Na5 7.Bc3 e5 8.Qc1 c6 9.Be5 Ba3; 5...Bg7 6.Nf4 0-0 7.h3 e5 8.Be5 Nc6 9.Bf6 Qf6) 6.c4 e5 7.Nc3 a5 8.Nd5 ab4 9.Nc2 Nd5; A2) 5.h3 Bg7 (5...Na6 6.Bf6 ef6 7.c3 f5 8.hg4 fg4 9.Rh5 Be6) 6.hg4 Bg4 7.Be2 h5 8.Nf3 Nc6 9.b5 Nb4; B) 4...a6 5.Nf3 Nc6 (5...Rg8 6.Bf6 ef6 7.c3 Nc6 8.Bd3 Bg4 9.Qa4 Bf3) 6.c4 Rg8 7.Nc2 e6 8.b5 ab5 9.cb5 Na5; C) 4...a5 5.b5 Nbd7 (5...Rg8 6.Nf3 g4 7.Ne5 Nbd7 8.Bd3 e6 9.Nd7 Bd7) 6.Be2 Bg7 7.Nf3 g4 8.Ne5 Ne5 9.Be5 Rg8.

4.c4 dc4 5.Bc4 Nc6 6.b5 Nb4 7.Qb3 Nd3?? (better is 7...e6+=) 8.Bd3 Nd5 (8...Be6 9.Qc2 Bg7+-) 9.Bh8 f6 (9...h6 10.Nf3+-) 10.Bh7 b6 (10...Qd6 11.h4+-) 11.Bg8 (11.Bg6 Kd7 12.Qd5) 11...e6+- 12.Qd1 (12.Nc3 Nc3 13.dc3 c6+-) 12...f5 (12...Bb4 13.Qh5 Kd7 14.Qf7 Kd6 15.e4+-) 13.Qh5 Kd7 14.Qf7 (better is 14.Nf3 Bd6 15.Qg6+-) 14...Be7 (14...Qe7 15.Qg6 c5+-) 15.Qe6 Ke8 16.Qf7 (16.Qg6 Kd7 17.Qc6) 16...Kd7 17.Qd5 (17.Qf5 Ke8 18.Qg6 Kd7 19.Qc6) 17...Ke8 18.Qc6 (18.Qf7 Kd7 19.Qf5 Ke8 20.Qg6 Kd7 21.Qc6) 18...Bd7 19.Qg6 Kf8 1–0. Valpa – LADY, playchess.de, 2002.

4.c4 Nc6 5.b5 Na5 6.cd5 Bg7 7.Qa4 b6 8.Nf3 g4 9.Bf6 Bf6.

4.c4 Bg4 5.Qb3 (5.Nf3 Nc6 6.b5 Na5 7.cd5 Qd5 8.Qa4 Bf3 9.Nc3 Qd7) 5...e5 (5...d4 6.h3 Bh5 7.ed4 a5 8.b5 Nbd7 9.Qe3 Nb6) 6.h3 Bh5 7.Nf3 Bf3 8.gf3 d4 9.h4 Rg8.

4.c4 Bg7= A) 5.h4 g4 6.cd5 c6 7.Qa4 Bd7 8.d6 ed6 9.Nc3 Na6; B) 5.Nc3 0-0 (5...Nc6 6.Nf3 g4 7.cd5 Nd5 8.b5 gf3 9.bc6 fg2) 6.cd5 Nd5 7.Nf3 Nb4 8.Ng5 Nd3 9.Bd3 Qd3; C) 5.cd5 0-0 6.h4 g4 7.Bf6 Bf6 8.Nc3 c6 9.Nge2 Na6.

4.Nf3 a6 5.Be2 (5.Ng5 Nc6+/– 6.a3 Bf5 7.Bd3 Bd3 8.cd3 Qd6 9.Nf3 Rg8; 5.a3 Bh6 (5...Nc6 6.Ng5 Bf5 7.Bd3 Bd3 8.cd3 Qd6 9.Nf3 0-0-0; 5...g4 6.Bf6 ef6 7.Nd4 c5 8.bc5 Bc5 9.Nb3 Be7) 6.h4 g4 7.Bf6 ef6 8.Nd4 Nc6 9.Nc6 bc6; 5.c4 Nc6 (5...g4 6.Ne5 Nc6 7.Qa4 Qd6 8.c5 Qe6 9.Na3 Kd8) 6.cd5 Qd5 7.Nc3 Qf5 8.Qa4 Bd7 9.b5 Ne5) 5...h6 (5...Qd6 6.a3= (6.Be5 Qb4 7.Nc3 Qa5 8.Nd4 c6 9.h4 Nbd7) 6...Nc6 7.h3 Bf5 8.Nc3 d4 9.Nd4 Nd4; 5...Nc6 6.Ng5 Rg8 7.h4 h6 8.Bf6 ef6 9.Nh3 Bb4; 5...Rg8 6.Ne5 Bg7 7.0-0 Nc6 8.Nc6 bc6 9.Bd4 a5) 6.0-0 (6.Bf6 ef6 7.c3 (7.a3 Nc6 8.Nc3 Be7 9.0-0 0-0) 7...Nc6= 8.Na3 Bd6 9.Nc2 0-0; 6.c4 Nc6 7.cd5 Qd5 8.Nc3 Qd8 9.Ne4 Bf5) 6...b5 (6...Bg7 7.c4= dc4 8.Bc4 Nc6 9.Ne5 0-0; 6...Nc6 7.a3 Bg7 8.Nc3 Bf5 9.Na4 Qd6) 7.a3 (7.a4 ba4 8.c4 Bd7+= (8...Bg7 9.Qa4 Nbd7) 9.cd5 Bg7) 7...Nc6 (7...e6 8.d3+= (8.Ne5 Bd6 9.f4 0-0) 8...Nc6 9.Nbd2 a5) 8.Nc3 (8.a4 ba4 (worse is 8...Nb4 9.ab5 Bf5 10.Nd4+-; 8...Bd7 9.Nc3 Nb4) 9.Bf6 (9.Ne5 Qd6) 9...ef6+=; 8.Ne5 Bb7 9.Nc6 Bc6) 8...e6 (8...g4 9.Ne1= (9.Nh4 Qd7) 9...Qd6; 8...Qd6 9.a4 g4) 9.d4 (9.a4 ba4+/– (9...g4 10.Nd4 Nd4 11.ed4 ba4 12.Ra4 Rb8=)) 9...Bd6 10.g3 (better is 10.Bd3=) 10...e5?? (better is 10...Bb7=) 11.de5+- Be5 12.Ne5 Ne5 13.f4 Nc4 (13...gf4 14.ef4 Ng6 15.Nb5 ab5 16.Bb5 Kf8+/–) 14.Bc1?? (14.Bc4 bc4 15.fg5 hg5 16.Nd5 Nd5 17.Bh8 Be6+-) 14...Bf5?? (14...Bh3 15.Rf2 Rb8 16.Qd4 gf4 17.Qf4+/–) 15.a4 0-0? 16.ab5 ab5 17.Ra8 Qa8 18.Nb5 c6? 19.Nd4 Bd7? 20.fg5 Nh7 21.gh6 Qe8 22.Qd3 Ne3 23.Be3 Qe5 24.Nf3 Qd6 25.Bc5 Qg6 26.Qg6 fg6 27.Bf8 Kf8 28.Ne5 Ke8 29.Ng6 Bh3 30.Rf4 Be6 31.Bh5 Kd7 32.Nf8 Nf8 33.Rf8 Ke7 34.Re8 Kd6 35.h7 1–0. Neumann,Frank (1635) – Korn,Lothar, remoteschach.de, 2010.

4.Bf6 ef6 5.a3 a5 =.

4.Bf6 Rg8?? 5.Bb2 e6 6.a3 c5 7.c4 a5 8.ba5 Ra5 9.cd5 Qd5 10.Nc3 Qd8 11.Qc2 f5 12.Be2 g4 13.h3 h6 14.hg4 Qg5 15.f4 Qg6 16.g5! hg5 17.Bh5 gf4 18.Bg6 Rg6 19.Kf2 e5 20.ef4 c4 21.Re1 e4 22.Ne4! fe4 23.Re4 Be6 24.Qc4 Bc5 25.d4 Kf8 26.Re6 Kg7 27.dc5 Rf6 28.Bf6 Kf7 29.Ra6 (29...Ke8 30.Qe6 Kf8 31.Rh8; 29.Re7 Kg6 30.Qe4 Kf6 31.Qe6) 1–0. wlittle (1985) – bjhaskins, net–chess.com, 2002.

5.Ne5= Nc6 6.Bb5 Qd6 7.Bd4 a6 8.Bc6 bc6 9.a3 a5.

5.Ne5= Bg7 6.Bd4 a5 7.b5 Qd6 8.Bd3 h5 9.Nc3 Nbd7.

5.Ne5 Bg7 6.Be2=.

5.Ne5 h5 6.b5 (6.c4 Rh6+-) 6...Bg7 7.f4 (7.c4 Nbd7=) 7...0-0 8.c4 Be6 (8...a6 9.Qc2=) 9.cd5 (9.h3!? Nbd7 10.hg4 Ne5 11.fe5 Ng4 12.Rh5+=) 9...Nd5= 10.Be2 Nd7 11.0-0 Ne5 12.fe5 c5 13.Qc2 Rc8 14.Qe4 Nb4 15.Qb7 Bd5 16.Qa7 Nc2 17.a4 Ra8 18.Qc5 Rc8 (worse 18...Na1 19.Ba1 Rc8 20.Qa3+-) 19.Qa7 Na1 (19...Ra8 20.Qc5 Rc8= (20...Na1? 21.Ba1 Rc8 22.Qb4+-)) 20.Ba1+- Rc7 (20...Ra8 21.Qc5 Rc8 22.Qb4+-) 21.Qa5+- Bb7 22.b6 Rc8 23.Bd4 Ra8 24.Qb4 Qd5 25.Rf2 Be5 26.Nc3 Qd6 27.Qd6 Bd6 28.Rf5 f6 29.Bc5 (worse 29.Rh5 e5 30.Nb5 Be7+-) 29...Rfd8 30.d4 h4 (30...Bc5 31.Rc5 e5+-) 31.Bd6 (better 31.Rh5!? Ra5 32.Bb5+-) 31...Rd6+- 32.Bc4 (32.a5!? e5 33.Nb5+-) 32...Kf8= 33.a5 e5 34.de5 (34.Na4 Bc8 35.Rh5 Ra5 36.Rh8 Ke7 37.Rh7 Kd8 38.Rh8 Ke7 39.Rh7 Kd8 40.Rh8 Ke7=) 34...Rc6= 35.Bd5 Rc3 36.Rf6 Ke7 37.Rf7 Ke8 38.Rb7 Ra5 39.Rb8 Kd7 40.e4 Rb5 41.e6 Kd6 42.Rd8 Ke7 43.Rd7 Ke8 44.Rc7 Rb1 45.Kf2 Rb2 46.Ke1 Rc7 47.bc7 Rc2 48.Bb3 Rc7 49.Kd2 (better 49.Bd1!?=) 49...Ra7-/+ 50.Bd5 (50.g3 Ra3 51.Kc3 hg3 52.hg3 Ra1=+) 50...Ra3-+ 51.Bc6 (51.Ke2!?-+) 51...Ke7 52.Bd5 g3 53.hg3 Rg3 54.e5 Rg5 0–1. GuestKBLD – GuestNPCN, freechess.org, 2020.

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 d5).

4.a4 Bg7 5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.c4 dc4 5.Bc4 Bg7 6.Nf3 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4 dc4 7.Bc4).

4.Be2 Bg7 5.Nf3 0-0 6.0-0 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5 7.0-0).

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 d5).

5.c4 0-0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.a3).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

5.Nf3 0-0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.a3).

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 d5).

5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0-0 5.Nf3 d5).

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 g6).

5.a4 Bg7 6.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

5.c5 Bg7 6.d4 0-0 7.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.c5).

5.Nf3 Bg7 6.a4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

5.Nf3 Bg7 6.b5 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.b5).

5.Nf3 Bg7 6.Nc3 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nc3).

5.Nf3 Bg7 6.d4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

5.Nf3 Bg7 6.Be2 0-0 7.0-0 Bg4 8.d4 e6 9.Nbd2 Nbd7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4 8.Be2 Nbd7 9.0-0 e6).

(--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d5).

5.a4 0-0 6.Nf3 c6 (---> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

5.Qb3 0-0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4).

5.cd5 0-0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.cd5).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.c4).

5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5).

5.Nf3 0-0 6.d4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

5.Nf3 0-0 6.Be2 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

5.Nf3 c6 6.a4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

5.Nf3 c6 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.d4 d5).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.d4).

(--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5).

5.a3 0-0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.a3).

5.b5 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0-0 5.Nf3 d5).

5.c4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5).

5.c4 0-0 6.Nc3 c6 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nc3).

5.c4 0-0 6.d4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

5.c4 0-0 6.d4 c6 7.Nbd2 a5 8.b5 a4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 a5 8.b5 a4).

5.c4 0-0 6.Be2 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

5.c4 dc4 6.Bc4 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4 dc4 7.Bc4).

5.c4 c6 6.a4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.a4 d5).

5.c4 c6 6.Nc3 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nc3).

5.c4 c6 6.d4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

5.c4 c6 6.d4 0-0 7.Nbd2 Bg4 8.Be2 e6 9.0-0 Nbd7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4 8.Be2 Nbd7 9.0-0 e6).

5.c4 c6 6.d4 Bg4 7.Nbd2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4).

5.c4 c6 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

5.d4 0-0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4).

5.d4 0-0 6.c4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

5.d4 0-0 6.c4 Bg4 7.Nbd2 c6 8.Be2 Nbd7 9.0-0 e6 10.h3 Bf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4 8.Be2 Nbd7 9.0-0 e6 10.h3 Bf3).

5.d4 0-0 6.Nbd2 Bg4 7.c4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4).

5.Be2 0-0 6.0-0 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5 7.0-0).

5.Be2 0-0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.Be2).

5.Be2 0-0 6.c4 c6 (---> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

5.Be2 0-0 6.d3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.d3 0-0 6.Be2).

5.Be2 b6 6.0-0 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0-0 6.0-0 b6).

5.Be2 Nbd7 6.0-0 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0-0 6.0-0 Nbd7).

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 d5).

5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5).

5.Nf3 0-0 6.Be2 c6 7.0-0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Bg4 7.0-0 c6).

5.Nf3 Nbd7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Nbd7).

5.Nf3 e6 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 e6).

4.Bb5 Bd7 5.Bd3 e6 6.b5 Bb4 7.c3 Bc5 8.Nf3 g6 9.h4 Qe7 10.c4 dc4 11.Bc4 Rg8 12.a3 Ne4 13.d3 Nd6 14.Ng5 Nf5 (better is 14...Bb5!? 15.Bb5 Nb5+=) 15.Qf3 Bd6?? (better is 15...c6+=) 16.Qb7+- Bc6 (16...c6 17.Nh7 cb5+-) 17.bc6 Ne3 (17...Nh4 18.Qa8 Ng2 19.Kf1 Ne3 20.fe3 Qg5 21.Qb8 Ke7 22.Qg8 Qf5 23.Ke1+-) 18.Qa8 (better is 18.fe3 Bg3 19.Kd1 Bh4 20.Qa8 Qg5 21.Qb8 Qd8 22.Qa7 Bf6 23.Bf6 Qf6 24.Qc7 Qa1+-) 18...Qd8 19.fe3 Bg3 20.Kd1 Ke7 21.Qa7 (better is 21.Ne4 Qe8 22.Bf6 Kf8 23.Qa7 Nc6 24.Qc5 Ne7 25.Ng3 Qd7+-) 21...Kf8 22.Rf1 Nc6 23.Qc5 Ke8 24.Qc6 Kf8 25.Be6 Qd3 26.Kc1 Qe3 27.Nd2 Bf4 28.Nf7 Qd2+- 29.Kb1 Qd3 30.Ka2 Qd2 31.Rad1 Qe3 32.Rd8 Ke7 33.Qd7 1–0. Pekin Dragons – pieeater, ChessWorld.net, 2011.

4.Nf3 a6 5.c4 Bg4 6.cd5 Qd5 7.Nc3 Bf3?? (better 7...Qd8=) 8.Nd5+- (8.gf3?! Qd7=; 8.Qf3?! Qf3 9.gf3 Nc6=) 8...Bd1 9.Nc7 Kd7 10.Na8 Ba4 (10...Bg4+-) 11.Nb6 Kc6 (11...Kd6 12.Na4 Nd5 13.a3+-) 12.Na4 e6 13.Rc1 Kd7 14.Nb6 Ke7 (14...Kd6 15.Ba3 Nc6 16.b5 Kc7 17.Na8 Kb8 18.bc6 Ba3 19.c7 Ka8 20.c8Q Rc8 21.Rc8 Ka7 22.Rc7+-) 15.Rc7 Nbd7 (15...Nfd7 16.Rb7 f6+-) 16.Bf6 Kf6 17.Nd7 Kg6 18.Rc8 Bb4 19.Rh8 1-0. PEREIRA – Whitak, internet, 2021.

4.Nf3 e6 5.a3 a5 6.b5 Nbd7 7.Nc3 Bd6 8.Be2 c5 9.bc6 (9.Ng5 Nb6+=) 9...bc6 10.Rb1 Ba6 11.Nd4 (11.Ng5 Be2 12.Qe2 0-0+=) 11...Be2 12.Qe2 Qc7 13.f4 0-0 14.0-0 g6 (14...e5 15.Nf5+=) 15.a4 (15.h3 Rfb8+=) 15...Rfb8+= 16.Nb3 Rb7 17.Na2 Ne4 18.Nc3 Nec5 19.Ba3 (19.Nc5!? Bc5 20.Ba1-/+) 19...Na4! 20.Na4 Ba3 21.Ra1 Bd6 22.Nc3 Rb4 (22...Be7 23.Ra2-/+) 23.Na2 (better is 23.Nc1-/+) 23...Rb7 (23...Rc4 24.d3 Ra4 25.Nc3 Ra1 26.Ra1-+) 24.Nc3-/+ Bb4 25.Na4 Rab8 26.Ra2 c5 (26...Kg7 27.e4-/+) 27.c4 Nf6 28.Rc1 d4! 29.ed4 cd4 30.g3 Ba3 31.Ra3 Rb3 32.Rb3 Rb3 33.Qf2? (better is 33.Qe5 Qe5 34.fe5-/+) 33...Qa7-+ 34.c5 (34.Qg2 h4! 35.gh4 Ra3-+) 34...Rb4 35.Nb6 Ne4 36.Qg2 (36.Qe1 Nc5! 37.Rc5 Qb6-+) 36...d3 37.Qf3 (37.Qf1 Rb3 38.Qe1 Nc5-+) 37...Nc5! 38.Rc5 Rb6 39.Rc8 (39.Qe3 a4 40.Rb5 Rb7 41.Qa7 Ra7-+) 39...Kh7 40.Qe3 (40.Qa8 Rb1 41.Kg2 Qa8 42.Ra8 Rb2-+) 40...Rb1 41.Kf2 0–1. marektheim – gibson, internet, 2015.

4.Nf3 g6 5.a3 Bg7 6.c4 dc4 7.Bc4 Nc6 8.Qc2 Bf5 9.Qb3 0-0 10.Nh4 Bg4?? (better 10...Qd7+=) 11.Ng6+- a5 12.Nf8 Qf8 13.b5 a4 14.Qa2 Na5 15.Nc3 Nc4 16.Qc4 Be6 (16...Qd8 17.d4+-) 17.Qe2 (17.Qc7 Ne4+-) 17...Rd8 (17...Qe8 18.d4+-) 18.d4 (18.Na4 Bd5+-) 18...Bg4 (18...Bb3 19.0-0+-) 19.f3 Bf5 20.e4 Bg6 21.0-0-0 (better 21.Na4!? Ne8 22.Nc5 b6+-) 21...Bh6 22.Kb1 Nd7 (22...Qe8 23.d5+-) 23.g3 (23.Qc4!? c6+-) 23...Nb6 24.f4 e6 25.Rhf1 White intends f5 (25.d5 Bg7 26.de6 fe6 27.Rd8 Qd8+-) 25...Qg7 (25...Qe7 26.Qf3+-) 26.f5 ef5 27.ef5 Bh7 28.Qe5 (better 28.Qh5 Nc4 29.d5+-) 28...Qg5 (28...Qe5 29.de5 Rd1 30.Nd1+- (worse 30.Rd1 Bf5 31.Ka1 Bg7+-)) 29.h4 (better 29.Bc1 Qg4 30.Bh6 Nc4+-) 29...Qg4 (29...Qe3 30.Qc7 Rc8 31.Qb6 (31.Qb7?! Rc3 32.Qb6 Rb3 33.Qd8 Bf8+-) 31...Rc3 32.Qd8 Bf8 33.Bc3 Qc3 34.Qg5 Bg7 35.Qc1 (35.Qh5?! Qb3 36.Ka1 Qc3 37.Ka2 Qc2 38.Ka1 Qc3 39.Kb1 Qb3 40.Kc1 Qc3 41.Kb1=) 35...Qb3 36.Ka1+-) 30.Ne4 (better 30.Qc7 Rd4 31.Qb6 Bf5 32.Ka1 Rd1 33.Rd1+-) 30...Nc4?? (30...Bg7 31.Qe7 Rc8 32.Nf6 Bf6 33.Qf6 Nd5+-) 31.Nf6 (31.Nf6 Kg7 32.Ng4 Ne5 33.Ne5+-) 1-0. only1b4 (2615) - alifie (2465), Rated Bullet game, lichess.org, 2020.

4.Nf3 h4 5.c4 Bg4 6.h3 Be6 7.Nd4 Bc8 8.cd5 Qd5 9.Nc3 Qg5 10.Rc1 e6 (10...c6!? 11.Nf3 Qg6+/–) 11.Ncb5 Bd6?? (better is 11...Na6 12.Nc7 Nc7 13.Rc7 Qd5+-) 12.Nd6+- Ke7 13.Rc7 Kd6 14.Rf7 Bd7 15.Nf3 Qd5 16.Be5 Kc6 (16...Qe5 17.Ne5 Ke5 18.Qa1 Kd6 19.Qd4 Kc7 20.Qc3 Nc6+-) 17.Qc2 Kb6 (17...Qc4 18.Qc4 Kb6 19.Qc5) 18.Qc7 1–0. Fritz 11 – quarjan, internet, 2014.

4.ba5 c5 5.e3 e6 6.Bc3 Bd6 7.Be2 0-0 8.0-0 Nc6 Increasing the pressure on the isolated pawn on a5 9.d4 Na5 10.dc5 Bc5 11.Bd4 Bd4 12.ed4 Ne4 13.Bd3 f5 14.Nbd2 Nc6 15.c4 Nb4 16.Be4 (better is 16.Qb3!? Nd3 17.Qd3=) 16...de4-/+ (worse is 16...fe4 17.Ne5=) 17.Qb3 (17.a3 Nc6 (17...ef3?! 18.ab4 Ra1 19.Qa1=) 18.Ne5 Qd4 19.Nc6 bc6-/+) 17...ef3 18.Qb4 fg2 19.Kg2 Qd4 20.Nb3 (20.a3 Rd8 21.Ra2 e5-+) 20...Qg4 21.Kh1 Qf3 22.Kg1 Bd7 23.Nd2 Qf4 (23...Qg4 24.Kh1 Bc6 25.f3-+) 24.f3 Bc6 25.a4 Rad8 26.Qc3?? (26.Rf2-+) 26…Rd2 (26...Rd2 27.Rf2 Rf2 28.Kf2 Qh2 29.Kf1 Rd8-+) 0–1. chesspal (2570) – eik (2570), net–chess.com, 2013.

4.b5 Nbd7 5.e3 Nb6 6.Bd3 e6 7.Nc3 a4 8.a3 Bd6 9.e4 de4 10.Ne4 Ne4 11.Be4 Nc4 12.Bg7 Rg8 13.Bd4 Na3 14.Qe2 Bd7 15.c4+= Rg4 16.Rc1 c5 17.bc6 Bc6= 18.Bc6 bc6 19.0-0 Rb8 20.h3+/– Rg6 21.Ne5 Be5 22.Qe5 Rb3 23.Be3 Qd3 24.Qc7 Kf8 25.Qc6+- Nb1 26.Rfd1 a3 27.Qf3 a2 28.Qa8 Kg7 29.Qa2 Na3 30.Qa1 Kg8 31.g3 Qe4 32.Qd4 Qd4 33.Bd4 Rd3 34.Bb2 Rb3 35.Ba1 Rb8 36.Rc3 (36.Rc3 Nb1 37.Re3+-) 1–0. Karl Gill – marekt, ChessWorld.net, 2009.

4.b5 Ne4 5.d3 Nc5 6.g3 Bd7 7.a4 c6 8.c4 dc4 9.dc4 f6 10.Bg2 e5 11.0-0 cb5 12.cb5+= Qb6 13.Nbd2 Be6 14.Rc1 Be7 15.Qc2 0-0 16.Ne1 Nbd7 17.Nd3 Rac8 18.Nc4 Qa7 19.Rfd1 Bf5 20.Ne3+= Bg6 21.Ba1 e4 22.Nc5 Nc5 23.Bd4 b6 24.Bc5 Rc5 25.Qb1 f5 26.Nd5 ½–½. Old Sisyphus – michaelanthony, ChessWorld.net, 2005.

5.a3 Nbd7 6.e3 e6 7.Be2 =.

5.a3 Nbd7 6.e3 h6 7.Be2 e5 8.Ne5+/– Ne5 9.Be5 Ne4 10.0-0 Bd6 11.Bd6 Qd6 12.d3 Qf6 13.Ra2 Nd6 14.c4 Be6 15.Nd2 dc4+= 16.dc4 Nb5 17.Ne4 Qe5 18.Qc2 Bf5 19.Bf3 Be4 20.Be4 Nd6 21.Bf3 Ra5 22.Rb2 0-0 23.Rfb1 Rc5= 24.Bb7 Rc4 25.Qd1 Rb8 26.h3 Qc5 27.Kh2 (27...Qa3 28.Qd5=+; better is 27.Ba6 Rb2 28.Rb2+=). giving up claim a win – amoruritme, ChessWorld.net, 2005.

5.a3 e6 6.e3 =.

5.e3 e6 6.c4 c6 7.Be2 Be7 8.0-0 0-0 9.d4 dc4 10.Bc4 cb5 11.Bb5 Bd7 12.Bd7 Nbd7 13.Ba3 b5 14.Be7 Qe7 15.Nc3 Qb4 16.Qd2 Rac8 17.Ne4 Qa3 18.Nf6 Nf6 19.Rab1 Ne4 20.Qb2 Qb2 21.Rb2 Nd6 22.Ne5 Rc3 23.Nd7 Rfc8 24.Nc5 a3 25.Re2 h6 26.f3 Nc4 27.Rfe1 Nb2 28.Ne4 Rc2 29.Nd6?? Re2-+ 30.Re2 Rc1 31.Kf2 b4 32.Nb5 b3! 33.ab3 0–1. Douville,F (1690) – Robveille,L (1915), 4th Open, Angers FRA, 2009.

5.e3 Bg4 6.c4 e6 7.a3 Ne4 8.d4 dc4 9.Bc4 Nd7 10.0-0 Ndf6 11.Be2 Bf3 12.Bf3+= Qd7 13.Qd3+/– Nd6 14.Nc3 Ra5 15.Rac1 Nb5= 16.Bb7 c6 17.d5 ed5 18.Nd5!+- Qb7 19.Nf6 gf6 20.Bf6 Bd6 21.Bh8 (21...Ba3 22.Rfd1+-) 1–0. Skulsky,I – Vancouver,H, 1988.

5.e3 b6 6.c4 e6 7.Qc2 Bb7 8.Be2 Nbd7 9.a4 Be7 10.Na3 0-0 11.0-0 Rc8 12.Rac1 Re8 13.Rfd1 Bf8 14.Ng5 g6 15.Qc3 Bg7 16.Qc2 h6 17.Nf3 Qe7 18.cd5 Nd5 (worse 18...Bd5 19.d3+=) 19.Bg7 Kg7 20.Nc4 Kh7 21.Qb1 f6 22.Nh4 f5 23.Nf3 e5 24.d4? (24.d3 e4 25.de4 fe4= (25...Qe4? 26.Qe4 fe4 27.Nd6+-)) 24...e4?? (24...ed4 25.Re1 de3 26.fe3 Rcd8-+ (26...Ne3?! 27.Bd3 Bf3 28.Re3=+)) 25.Nfe5= Ne5 26.de5 (26.Ne5 cd4 27.Nc6 Bc6 28.bc6 d3 29.Bd3 ed3 30.Qd3 Nb4-+) 26...Nb4? (26...Red8 27.Qb3 Rb8 28.Nd6+=) 27.Nd6 (27.Nb6 Rcd8+-) 27...Rcd8? (better 27...Bd5 28.Nc8 Rc8+/-) 28.Ne8+- Re8 29.Rd6 Rd8? (29...Qe5 30.Rb6 Qc7 31.Rb7 Qb7 32.Rc5+-) 30.Rb6 Nd3 31.Bd3 ed3 32.Rd1 Qe5 (32...c4 33.Qa1 Rd7+-) 33.h3 (33.Rb7 Kh8 34.Rd3+-) 33...Qe4 34.f3?? (better 34.Rb7 Qb7 35.Rd3+-) 34...Qe3= 35.Kh2?? (35.Kh1 Bf3 36.Re1= (36.gf3? Qf3 37.Kh2 Re8 38.Rb7 Qb7 39.Qd3 Re7-+)) 35...g5?? (better 35...Bf3 36.gf3 Qf2 37.Kh1 Qf3 38.Kh2 Re8 39.Rb7 Qb7 40.Qd3 Re7-+) 36.Rb7+- Kg6 37.Qb2 Rd4 (37...Qf4 38.Kg1 Qd4 39.Qd4 Rd4 40.Rb6 Kg7 41.Rc6+-) 38.Qd2 Qe5 Black plans f4 39.Kh1 f4 (39...c4 40.Re1 Qd6 41.Qe3+-) 40.Rb6 Kh5 41.Rc6 (41.Re1 Qg7 42.Ree6 Rd8 43.Qc3 Rd4 44.Qe1 Re4 45.Qe4 d2 46.Qf5 d1Q 47.Kh2 Qh1 48.Kh1 Qa1 49.Kh2 Qg1 50.Kg1 c4 51.Rh6) 41...Qe3 (41...Qe2+-) 42.Qe3 fe3 (42...Rd6 43.Qe8 Kh4 44.Rd6 d2 45.Rh6 Kg3 46.Rd2 c4 47.Qe1) 43.Re6 (43.g4 Kh4 44.Rg1 h5 45.Rh6 Rg4 46.fg4 Kh3 47.Rh5) 43...e2 (43...g4 44.hg4 Kg5 45.Re3 c4+-) 44.Rd2 (44.g4 Kh4 45.Kg2 h5 46.Rh6 e1N 47.Re1 Rg4 48.fg4 d2 49.Rh5) 44...Rc4?? (better 44...Rd6 45.Ree2! de2 46.Re2 Kg6+-) 45.Kg1 (45.g4 Kh4 46.Kh2 h5 47.Rh6 Rg4 48.fg4 e1Q 49.Rh5) 45...Rc1 (45...e1Q 46.Re1 Kg6+-) 46.Kf2 (46.Kh2 g4 47.hg4 Kh4 48.Re5 Rh1 49.Kh1 Kg3 50.b6 Kf4 51.Re4 Kg5 52.b7 c4 53.b8Q e1R 54.Re1 h5 55.Qg8 Kh4 56.Kh2 hg4 57.Qg4) 46...Rf1 47.Kg3 e1Q? (better 47...c4 48.Rde2! de2+-) 48.Re1 Re1 49.Rd3 Re5?? (49...Kg6 50.Rd6 Kg7+-) 50.Rd6 c4 (50...Re2 51.b6 Rb2 52.Kh2+-) 51.Kh2 (51.b6 Re3 52.Kf2 g4 53.Ke3 c3 54.hg4 Kg5 55.b7 c2 56.Rd5 Kg6 57.Rc5 h5 58.b8Q c1B 59.Rc1 hg4 60.Rc6 Kh5 61.Qe5 Kh4 62.Rh6) 51...c3 52.g4 (52.g4 Kh4 53.Rh6) 1-0. icehot1 (2280) - angusss (2180), Rated Bullet game, lichess.org, 2015.

5.e3 Bg4 6.Be2 Nbd7 7.a4 e6= 8.d3 Rc8 (8...Bd6 9.h3 Bf3 10.Bf3=) 9.Nbd2 h6 10.h3 Bh5 11.0-0 Be7 12.c4 0-0 13.e4 Re8 (13...de4 14.Ne4 Qc7 15.Qb3=) 14.Qb3 (14.e5 Nh7+/–) 14...Bg6 (14...d4 15.e5 Ne5 16.g4 Bg4 17.hg4 Neg4 18.Rfe1=) 15.cd5+= ed5 16.e5 (16.ed5 Nb6 17.Rfe1 Nfd5+=) 16...Nh5 17.Rfe1 (better is 17.g3!?+=) 17...Nf4+= 18.Bf1 Nd3 19.Bd3 c4 20.Bc4 dc4 21.Nc4 Nc5 22.Qa2 Nd3 23.Red1 Bc5 24.Rd2 (24.Ba3 Ba3 25.Na3 Qc7+=) 24...Bb4-/+ 25.Rdd1 Qc7 (25...Be4 26.e6 Qd5 27.Nce5 Qa2 28.Ra2 Ne5 29.Be5 Re6 30.Bf4+=) 26.Ne3-/+ Bc5 (26...Nb2 A) 27.Qb2? Bc3 28.Qa3 Ba1 (28...Be5?! 29.Rac1 Qb8 30.Ne5 Qe5 31.Rc8 Rc8 32.Qd6 Qd6 33.Rd6=) 29.Qa1 Red8-+; B) 27.Nd5 Qc2 28.Nb4 ab4 29.Rd2+=) 27.Rd2 (27.Qb3 Rcd8 28.Rd2+=) 27...Qb6 (better is 27...Be4 28.Rad1 Bf3 (28...Nb2?? 29.Rd7 Re7 30.Rc7 Rec7 31.Qb2+-) 29.gf3 Ne5 30.Be5 Qe5-/+ (30...Re5?! 31.Rd7 Rg5 32.Kf1=)) 28.Nd1?? (better is 28.Nc4 Bf2 29.Kh1+=) 28...Be4-+ 29.Qb3 (29.Nc3 Bf2 30.Kh2 Nb4-+) 29...Qg6 30.Kf1? (30.Nh4 Qg3 31.Rd3 Qd3 32.Qd3 Bd3 33.Nf3-+) 30...Nf4 31.g3 (31.g4 Nh3 32.e6 Re6-+) 31...Bd3 (31...Nh3?! 32.Nh4 Qh5 33.f3-+) 32.Kg1 Qg3 0–1. Valenta,Vit (2195) – Holeksa,Zdenek (2180), CZE–ChT2F, 2010.

4.a3 e6 =.

4.a3 h6 5.d3 Qd6 6.d4 e6 7.c4 dc4 8.e4 Qd8 (8...Ne4 9.Bc4 Be7 10.d5-/+) 9.Bc4 (9.e5 Nd5 10.Bc4 b5 11.Bd5 ed5=) 9...b5 (9...Ne4 10.0-0+=) 10.Bb3 (10.Bd3 Bb7 11.Qc2 Nh5+=) 10...Bb7 11.0-0 Nh7?? (better is 11...Ne4 12.Re1 Nf6+=) 12.d5+/– ½–½. Radwan,Jan (1740) – Sarnowski,Ryszard, Rowy/Fregata Poland, 2009.

4.a4 c6 5.e3 Nbd7 6.d4 e6 7.b5 ab5 8.ab5 Ra1 9.Ba1 Bb4 (9...cb5 10.Bd3=+) 10.Nbd2 Ne4 11.Bd3 Bd2 (better 11...Qa5!? 12.bc6 bc6 13.Be4 de4=+) 12.Nd2+= Qf6? (12...Qa5 13.Be4 de4 14.bc6 bc6 15.0-0+=) 13.0-0 (13.Ne4 de4 14.Be4 cb5+-) 13...0-0 (better 13...Nd2!? 14.Qd2 cb5+-) 14.bc6 bc6 15.Ne4 de4 16.Be4 c5 (16...Ba6 17.Re1+-) 17.dc5 Qh6 (17...Qg5 18.c6 Nc5 19.f4+-) 18.c6 Ne5?? (18...Nc5 19.Bf3 Qg5+-) 19.Be5 Ba6 20.Bd3 Rd8 (20...Bc8+-) 21.c7 Bd3 22.cd8Q (22.cd8R?!=) 1–0. GuestBZKG – shaktiiiii, freechess.org, 2018.

4.a4 Nc6 5.c3 e6 (5...g6 6.d4-/+) 6.Nd4 (6.g3 Bd6=+) 6...Be7 (6...Nd4 7.cd4 Bb4 8.e3-/+) 7.Nc6 bc6 8.e3 0-0 9.Ba3 Bb7 (9...e5 10.Be2-/+) 10.c4? (10.d4 Bd6=+) 10...Ne4 (10...d4 11.d3-+) 11.cd5? (11.Nc3 Bd6-/+) 11...cd5 (11...Bh4 12.g3 Qf6 13.f3 Qa1 14.gh4-/+) 12.b5? (better 12.Nc3!?-/+) 12...Ba3 13.Na3 Qd6 (better 13...d4!? 14.Qf3 d3-+) 14.ba6 Ba6 15.Ba6 Qa6 16.Nb5 Qa5 17.0-0? (17.Rc1 c6 18.Rc6 Rfc8=+) 17...Qd2 (better 17...Nd2 18.Re1 c5-+) 18.Qd2 Nd2 19.Nc7 Nf1 20.Na8 Ra8 (20...Ne3 21.Nb6 Nc2 22.Rb1=) 21.Kf1= f5 22.Ke2 Kf7 23.Kd3 h5 24.Kd4 g5 (24...Ra5 25.Kc3 Ke7 26.Kb4+=) 25.Ke5 (25.a5 Ke7 26.a6 Kd6+-) 25...Ra5? (better 25...Rd8!?+=) 26.Kd6+- Kf6 (26...f4!? 27.Kc6+-) 27.Kc6 f4 (27...d4 28.ed4 Ke7 29.Kb6+-) 28.ef4 gf4 29.Kb6 Ra8 30.a5 e5 31.Kb7 Rf8 (31...Rg8 32.g3 e4 33.gf4 d4+-) 32.a6 e4 33.a7 e3 (33...Ke7 34.Ra5 Kd6+-) 34.fe3 fe3 (34...Rd8 35.ef4 Kf5+-) 35.Rf1 Ke5 36.Rf8 e2 37.Re8 Kd4 38.Re2 Kd3 39.Re5 d4 (39...Kd4 40.Rh5 Ke4 41.a8Q Ke3 42.Qa3 Kd2 43.Qb2 Kd3 44.Rd5 Ke3 45.Kc6 Kf4 46.Qd4) 40.Rh5 Kd2 (40...Ke4 41.a8Q Ke3 42.Qa3 Ke2 43.Re5 Kd2 44.Rc5 d3 45.Qb2 Ke3 46.Re5 Kf4 47.Qd4) 41.a8Q d3 (41...Kd3 42.Rh3 Ke2 43.Qa2 Kf1 44.Rd3 Kg1 45.g4 Kf1 46.Rd1) 42.Qa2 (42.Qa2 Ke3 43.Re5 Kd4 44.Qb2 Kc4 45.Re4 Kd5 46.Qe5) 1–0. hamidrezaderakhshan – emmanuel_l, lichess.org, 2020.

4.d3 Bf5 5.Nbd2 h6 (5...e6!?+=) 6.c4= c6 7.Nd4 Bh7 8.e3 (8.cd5 cd5 9.Qb3 Nbd7=) 8...e6 9.Be2 (9.Qb3!?=) 9...Nbd7 10.c5 1–0. croach (2360) – dsteel (2230), net–chess.com, 2015.

4.e3 Bd7 5.c4 dc4 6.Bc4 b5 7.Be2 e6 8.a3 Be7 9.0-0 Nc6 10.d4 0-0 11.Nbd2 h6 12.Nb3 Nh7 (12...a5!?+=) 13.Nc5 Qc8? (13...Bc5 14.dc5 Qe7 15.a4+/–) 14.Qc2 (14.Nd7 Qd7 15.Qc2 Rfb8+-) 14...Ng5? (14...Bc5 15.dc5 Re8 16.Bc3+/–) 15.Rab1 (better is 15.Nd7!? Qd7 16.Rfc1 Na7+-) 15...a5 16.Ra1 (better is 16.Ng5 hg5 17.Nd7 (17.Bb5?! Nd4 18.Bd7 Nc2 19.Bc8 Rfc8+=) 17...Qd7 18.Bf3+-) 16...ab4+= 17.ab4 (worse is 17.Bb5 Nf3 18.gf3 Nd4 19.Bd4 Bb5-+; 17.Nd7?! Qd7 18.Ng5 hg5+=) 17...f5?? (better is 17...Nb4 18.Qb3 Bc5 19.dc5 Nf3 20.Bf3 Ra1 21.Ra1 Nc6+=) 18.Ra8+- Qa8 19.Ra1 Qd8 20.Qc3 Ne4 21.Ne4 fe4+= Attacks the isolani on b4 22.Nd2 Bh4?? 23.f3?? ef3+/– 24.Nf3 Bf6 25.Bb5 Ne7 26.Be2 Nd5 27.Qb3 Qe7 28.Kf2 Nb4 29.Ba3+/– Rb8 30.Rb1 Bh4?? 31.g3+- Nd3 32.Qd3 Rb1 33.Be7 (33.Be7 Rb2 34.gh4+-) 1–0. Darkseid – groovenetwork, ChessWorld.net, 2013.

4.e3 g6 5.Ne5 Bg7 6.f4 0-0 7.Be2 b6 8.0-0 Bb7 9.c4 Nbd7 10.Nc3 dc4 11.Bc4 Ne5 12.fe5 Nd7 (12...Nd5 13.Bd5 Bd5 14.Nd5 Qd5 15.d4=) 13.e6 fe6 14.Be6 Kh8 15.Qe2 (15.d4 Nf6+=) 15...Ne5 (15...c5 16.a3=) 16.d4 (16.Rf8 Qf8 17.d4 Qf6+-) 16...Qd6+= 17.Bb3 Nd7 18.a3 Nf6 19.Rad1 Rad8 20.e4 e5 21.de5 (21.Rf2!? ed4 22.e5+-) 21...Qe5= The pressure on the isolated pawn grows 22.Nd5 Qg5?? (better 22...Qe4 23.Qe4 Ne4 24.Rf8 Rf8 25.Bg7 Kg7 26.Nc7 Kh6=) 23.Nf6+- Bf6 (23...Rd1 24.Qd1 Qe3 25.Kh1 Be4 26.Ne4 Bb2 27.Rf8 Kg7 28.Rf7 Kh6+-) 24.Bf6 (24.Rd8 Kg7 25.Rf8 Bb2 26.Qb2 Kh6 27.R1f7 Qe3 28.Kf1 Qd2 29.Rh7 Kg5 30.Qd2 Kg4 31.Be6) 24...Rf6 25.Rd8 Kg7 26.Rd7 Kh6 27.Qd2 (27.Qd2 Qd2 28.Rd2 Rf1 29.Kf1 Be4 30.Bc2+-) 1–0. FeegLood (2575) – Blitzstream_twitch (2415), lichess.org, 2015.

4.h3 Nc6 5.a3 e5 (5...d4 6.e3 de3 7.de3 Qd1 8.Kd1=) 6.Be5 (6.Ne5!? Ne5 7.Be5+=) 6...Ne5=+ 7.Ne5 Bd6 8.Nd3 0-0 9.c3 Bf5 10.Qb3 (10.Nc5 Ne4 11.d4 Qf6 12.Ne4 Be4=) 10...Re8 (10...Bd3 11.ed3 Re8 12.Be2 Qe7-+) 11.f3?? (better is 11.Nc5 Ra7 12.e3=+) 11...Bd3-+ 12.g4 (12.Kd1 Bc4 13.Qc2 a5-+) 12...Qe7 (better is 12...Ne4!? 13.fe4 Be4 14.Bg2 Bg2 15.Rg1 Bh3 16.Kd1-+) 13.Bg2 (13.e3 Bf1 14.Rf1 Bg3 15.Kd1-+) 13…Qe2 0–1. toon magpie – dugmak, ChessWorld.net, 2005.

5.d4 g6 6.e3 Bg7 7.Bd3 0-0 8.c4 e6 (8...e5!? 9.cd5 Nd5 10.de5 Qe7+=) 9.Nbd2+= Bd7 10.0-0 Rc8 11.Qb3 dc4 12.Nc4 Nd5 13.Rac1 b5 (13...Qe7!?+=) 14.Nce5+/– Ne5 15.Ne5 Be5 (15...f6 16.Nd7 Qd7 17.Rc5+/–) 16.de5 Qe7 17.Bd4 Rfe8 18.f4 Qh4 19.Rf3 Qe7 20.g4 White intends f5 (20.e4 Nb6 21.f5 Nc4 22.fg6 fg6 23.Bc4 bc4 24.Qc4 Bb5+-) 20...Kh8 (20...Qh4!?+/–) 21.Rh3+- c6 (21...a5 22.Bc5 (worse is 22.ba5 c5 23.Bb2 c4 24.Bc4 bc4 25.Rc4 Rc4 26.Qc4 Rc8-+) 22...Qd8 23.ba5+-) 22.Rf1 (22.Bc5 Qd8+-) 22...Rg8 (22...c5 23.bc5 Rc5 24.e4+- (worse is 24.Bc5 Qc5 25.Qc2 Qc2 26.Bc2 Rc8+-)) 23.Kh1 (better is 23.e4 c5 24.bc5+- (24.ed5?! cd4 25.d6 Qd8+/–)) 23...Rcf8? (23...c5 24.Bc5 Rc5 25.bc5 Qc5 26.e4+-) 24.f5 (better is 24.e4 Nc7 25.Bc5+-) 24...Bc8?? (better is 24...Qg5+-) 25.f6 Qb7 26.Bc5 Rd8 (26...Qb8 27.Bd6 Qb7 28.e4+-) 27.Be2 a5 (27...Qc7 28.e4 h5 29.Qg3 Nf6 30.Rf6+-) 28.e4 a4 (28...h5+-) 29.Rh7!! 1–0. Barbarickiy,Yuri – Arkhireev,Vladimir, Agaea. eia, 2008.

5.e3 Bf5 6.Be2 e6 7.Nh4 Bg6 8.0-0 Bd6 9.f4 Qe7 10.Ra2 Be4 11.d3 Bg6 12.Bf3 Nd7 (12...Rd8!?+=) 13.Bg7 Rg8 14.Ng6 hg6 15.Bb2 f6 16.c4+- dc4 17.dc4 Qf7 18.Bc6 bc6 19.c5 Bf8 20.Qa4 e5 21.Qc6 Qa2 22.Qa8 Ke7 23.Nc3 Qb2 24.Nd5 Kf7 25.Qd8 Ke6 26.Nc7 Kf7 27.Qe8 Kg7 28.Qd7 Kh8 29.Qh3 Kg7 30.Ne8 Kf7 31.Qd7 Be7 32.Nd6 Kf8 33.Qe8 Kg7 34.Qe7 Kh6 35.Nf7 Kh5 36.Qf6 Qg2 37.Kg2 g5 38.Qh6 1–0. guest488 – guest243, ICC, 2003.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Bc5 8.e3 c6 (8...0-0 9.d4 Bd6 10.Bd3=) 9.c4 (9.Be5 Nbd7=) 9...Bd7 10.Nc3 0-0 11.Bd3 Bb4 12.0-0 b6 (12...Bd6 13.Qc2=) 13.Ne5 c5 14.Qc2 dc4 (14...Bc8 15.Na2 Ba5 16.Be2=) 15.Bc4+= Qe8 16.Nd7 Nbd7 17.Qb3 (17.Na2 Ba5+=) 17...Ne5 18.d4 cd4 (18...Nc4 19.Qc4 Qe7 20.dc5 Qc5 21.Qc5 bc5 22.Na4=) 19.Qb4+= dc3 20.Bc3 Nc4 (20...Qb8!?=) 21.Bf6+- gf6 22.Qc4 Qc8 23.Qg4 Kh8 24.Qf4 Qc3 25.e4 (25.Qd6 Qc5 26.Qc5 bc5+-) 25...Rd8 26.Rc1 (26.h3 Qd4+=) 26...Qd4 (26...Rd2 27.Rb1= (27.Rc3?? Rd1)) 27.g3 Ra8 0–1. GuestPRWP – GuestVNDB, freechess.org, 2018.

5.e3 c6 (5...Bb4 6.Bd3-/+) 6.Be2 Bb4 7.0-0 0-0 8.c3 Bd6 9.Qc2 (9.c4!?+=) 9...e5-/+ 10.Ng5 (better is 10.d3!?-/+) 10...h6-+ 11.Nf3 e4 12.Nd4 Qc7 13.h3 c5 14.Nb3 Be6 (14...Nc6 15.c4 Nb4 16.Qc1 dc4 17.Bc4-+) 15.a5 (better is 15.c4 Nc6 16.Bf6-+) 15...Qd7 (15...Nc6 16.Na3 Rfd8 17.c4-+) 16.f4? (better is 16.c4 Qe7 17.cd5 Bd5 18.Nc3-/+) 16...ef3! 17.Rf3 (17.Bf3 Bf5 Combination; 17.Rf3 Nc6 Combination; 17.gf3 Bh3 Deflection) 17...Ne4 18.Ba3 Nc6 19.d4 c4 20.Nc5 Nc5 21.dc5 Bc7 22.Bb4? (22.Nd2 Ba5 23.Re1 d4 24.Nc4 Bc4 25.Bc4 Bc3-+) 22...Nb4 (better is 22...d4 23.cd4 Nb4 24.Qd2-+) 23.cb4 Rae8 24.Nc3 Be5 (better is 24...d4!? 25.ed4 Qd4 26.Kf1-+) 25.Rd1 Bc3 (25...Qc6!? 26.Rf2 Re7 27.Bf3-+) 26.Qc3-/+ Bf5 (better is 26...Qe7!?-/+) 27.Bc4= Be4 28.Rg3 f6 29.Qd4 Re5 30.Be2 (30.Rg4!? Qe6 31.Qe4 de4 32.Be6 Re6 33.Rf4+=) 30...Kh8 31.Bg4 Bf5 32.Bf3 Be6 33.Rc1 Qc7 34.Kf2 Rg5 35.Rg5 fg5 36.Ke2 Rd8 37.Rf1 Qc6 (37...Qg3 38.Bg4 Bg8 39.Bf3=) 38.Kf2 Rf8 39.Kg1 Qd7 40.g4 (40.e4!? Rf4 41.g3+/–) 40...h5 41.Kg2 h4 42.Qe5 Qe7 43.Kg1 (worse is 43.Bd5 Rf1 44.Kf1 Qf7 45.Ke1 Bd5 46.Qg5 Qf3 47.Qd8 Kh7 48.Qh4 Kg6 49.Qh5 Kf6-/+) 43...Kh7 44.Bg2 (44.Bd5 Rf1 45.Kf1 Qf7 46.Ke1 Bd5 47.Qg5 Qe6 48.Qh4 Kg6 49.Qh5 Kf6 50.Qh4 Kf7 51.Qf2 Qf6-/+) 44...Rf1 45.Bf1 Qf6?? (better is 45...Kg6+=) 46.Qf6+- gf6 47.c6! Bc8 (47...bc6 48.Bd3 Double attack (48.Ba6 Deflection; 48.Bd3 Decoy)) 48.Bd3 Kg7 49.Bf5 (49.Bf5 bc6 50.Bc8+-) 1–0. alexp (2505) – itsmenow (2205), net–chess.com, 2015.

5.a3 Bg4 6.Be2 Nc6 7.d3 g6 8.Nbd2 Bg7 9.0-0 0-0 10.c4 e6 11.cb5 ab5 12.d4 Ne4 (12...Na7 13.h3 Bf3 14.Bf3=) 13.Ne4 (13.Bb5 Nd2 14.Qd2 Bf3 15.gf3 Qg5 16.Kh1 Ne7+/–) 13...de4 14.Nd2 (14.Bb5? Bf3 (14...ef3?! 15.Bc6 fg2 16.Qg4 gf1Q 17.Rf1+=) 15.gf3 Qg5 16.Kh1 ef3 17.Qf3 Qb5-+) 14...Be2 15.Qe2 Qd5 16.Rfc1 f5 17.Rc5 Qd6 Black intends f4 18.Qb5 Ne7 19.Qc4 Nd5 Black prepares the advance f4 20.Nb3 f4 21.Rc6 Qe7 22.Qe2 (22.ef4 Nf4 23.Bc1 Nd5+-) 22...f3+= 23.Qc2 (23.Qc4 fg2 24.Qe2+= (24.Kg2?? Qg5 25.Kh1 Rf2-+)) 23...Qh4= 24.Re6?? (24.Qc1 fg2 25.Qe1-/+) 24...Rae8 (better is 24...Qg4 25.Kf1 Qg2 26.Ke1 Qg1 27.Kd2 Qf2 28.Kc1 Qe1 29.Qd1 f2-+) 25.Re8-/+ Re8?? 26.Qd1 Rf8 27.g3 Qh5 28.Qf1?? Nf6?? 29.h4 Qg4 30.Kh2 Nh5 31.Qh3 Nf6 32.Qg4 Ng4 33.Kg1 Rc8 34.Nc5 h6 35.Rc1 g5 36.hg5 hg5 37.Ne4 Kf7 38.Ng5 Kf6 39.Nf3 Kf5 40.Nd2 Bh6 41.Rc5 Ke6 42.d5 Ke7 43.Bd4 Kd7 44.Ne4 Re8 45.Nf6 Nf6 46.Bf6 1–0. Fournier,Frederic (1865) – Ageev,Aleksandr Yuryevich (1865), Active, 2012.

5.a4 Bb7 6.ab5+/– ab5 7.Bb5 c6 8.Ra8 Ba8 9.Be2 Nbd7 10.0-0 e5 (10...Qb8 11.Nc3+/–) 11.Ne5 Bd6 (better is 11...Ne5!? 12.Be5 Bb4+/–) 12.Nd7+- Qd7 13.Bf6 gf6 14.c3 Qe7 (14...Rg8 15.g3+-) 15.Na3 Qe5 Threatening mate: Qxh2 16.f4 Qe4 17.Nc2 c5 (17...Bb7 18.Nd4+-) 18.Rf3 Rg8 (18...Bc6 19.bc5 Bc5 20.Nd4 Bd4 21.ed4+-) 19.Nd4! cd4 (19...Qd4 20.Qa4 Theme: Double Attack) 20.Qa4 A double attack (20.Qa4 Ke7 21.Qa7 Bc7 22.Qc7 Kf8 23.Qc5 Kg7 24.Rg3 Kh8 25.Rg8 Kg8 26.Qc8 Kg7 27.cd4 Qb1 28.Kf2+-) 1–0. Woelfelschneider,Peter – Rodion, 2008.

5.a4 e6!? =.

5.d3 Nbd7 6.Be2 g6 7.0-0 Bg7 8.Nbd2 c5 9.a3 0-0 10.c4 Bb7 (10...dc4 11.dc4 Qb6 12.Qb3=) 11.Rc1 Qc7 (11...Rc8 12.cb5 ab5 13.bc5 Nc5 14.Bf6 Bf6 15.d4+/–) 12.Qb3 (12.cb5!? ab5 13.bc5+/–) 12...dc4 13.dc4 bc4 14.Bc4 (worse is 14.Rc4 Bd5-/+) 14...Ng4 15.Bg7 Kg7 16.h3 Ngf6 17.Rfe1 Rab8 18.e4 Qf4 19.g3 Qc7 20.Ng5 Ne5? (better is 20...cb4 21.ab4 Qd6+/–) 21.Bf7!+- Nf7?? (21...Rf7 22.Ne6) 22.Ne6 Kg8 23.Nc7 cb4 24.ab4 a5 (24...Rfd8 25.Rc2+-) 25.b5 (25.b5 Rfd8 26.Qa2+-) 1–0. Patrinos,Ilias – Dovas,Dimitrios, Epikinonias op 4th, 2000.

5.a3 e6 =.

5.c4 dc4 6.Bc4 b5 7.Be2 =.

5.c4 dc4 6.Bc4 Bg4 7.0-0 e6= 8.a3 Bd6 9.h3 Bh5 10.d4 Bg6 11.Nbd2 Nbd7 12.Qb3 0-0 13.Rae1 Nb6= 14.e4 Nc4 15.Qc4 Bc7 16.Nh4 Ne4-+ 17.Ne4 Qh4 18.Nc5 b6 19.Nd7 Rfd8 20.Ne5 Be5 21.Re5 Rd5 22.Qc6= Rad8 23.Rd5+/– ed5 24.Qb6 Be4 25.g3 Qg5 26.Bc1 Qf6 27.Bf4?? Re8 28.Qf6+- gf6 29.Rc1 f5 30.g4 fg4 31.hg4 Bf3 32.Kh2 Re2? 33.Kg3+- Be4 34.Be5 Ra2?? 35.Rc8 1–0. orangutanb4 (2095) – guanako (1760), 2011.

5.c4 Bf5 6.Nc3 (6.c5 b6=) 6...e6 (6...dc4 7.Bc4 e6 8.a3=) 7.a3 Bd6 (7...dc4 8.Bc4 b5 9.Be2=) 8.d4 (8.c5 Bc7=) 8...dc4 9.Bc4 Nbd7 10.0-0 Qc7 (10...Nb6 11.Bb3=) 11.Rc1 (11.Re1 Nb6 12.Bd3 Bd3 13.Qd3 g5+=) 11...Bg4 (11...0-0 12.Re1 Nb6 13.Bd3 Bd3 14.Qd3=) 12.h3+= Bh5 13.Be2 (13.Bd3 0-0+=) 13...Rc8 (13...0-0 14.Qd3=) 14.Ng5 (14.b5 Qa5 15.ba6 ba6+=) 14...Be2= 15.Ne2 (15.Qe2 Rd8=) 15...Qd8 (15...0-0 16.Nc3=) 16.Ng3 (16.Nc3 0-0=) 16...h6 (16...Bg3 17.fg3 0-0 18.Qf3=) 17.N5e4+= Bg3 18.Ng3 0-0 19.e4 (19.Qf3 a5+=) 19...Qb6 20.Qe2 White intends e5 20...Rfd8 21.Rc2 (21.Nh5 Qb5 22.Nf6 Nf6+=) 21...a5 22.ba5 Qa5 23.Rfc1 (23.Rb1 Ra8=) 23...Re8 (23...Qg5 24.Qf3=) 24.e5 (24.Rb1 Ra8+=) 24...Nd5 25.Ne4 Ra8 (better is 25...Red8!?+=) 26.Nd6+/– Rf8 27.Nb7+- Qa7 28.Nd6 Rab8 29.Rc6 N7b6 30.R1c2 Qa4 31.Qg4 Ne7 32.R6c5 Nbd5 33.Bc1 Ng6 34.R5c4 Qa5 35.Qf3 Qe1 36.Kh2 Ne5?! 37.de5 Qe5 38.Bf4 Qf6 39.Qg3 Kh8 40.Nf7! Qf7 41.Bb8 Rb8 42.Qb8 (42.Qb8 Kh7 43.Qe5+-) 1–0. Wall,Bill – Sinn,John, internet, 2003.

5.a3 Bd7 6.Be2 e5 7.Ne5 Ne5 8.Be5 c6 9.d3 Be6 10.Nd2 Bd6 11.Bd6 Qd6 12.Nf3 h6 13.0-0 0-0 14.h3 b5 15.Nd4 Bd7 16.Rc1 Nh7 17.Bg4 f5 18.Be2 Qg6 19.Bh5 Qg5 20.Be2 f4 21.Nf3+/– Qg6 22.Kh1 fe3 23.fe3 Rae8 24.Nh4 Qg3 25.Rf8 Rf8 26.Qe1 Qe1 27.Re1+= Ng5 28.Nf3 Nf3+= 29.Bf3 Bf5 30.e4 de4 31.Be4 Be4 32.de4 Rf2 33.e5 Rc2= 34.e6 Kf8 35.Kg1 Rc3 36.Rd1 Ke7 37.Rd7 Ke6 38.Rg7 Ra3 39.Rh7 Kd5 40.Rh6 Kc4 41.Rc6= Kb4 42.g4 Rh3-/+ 43.Kg2 Ra3 44.g5 Ra2 45.Kf3 Ra1 46.g6 Rf1 47.Ke2 Rg1 48.Kf2 Rg5 49.Kf3 a5-/+ 50.Kf4 Rg1 51.Kf5 a4 52.Kf6 a3 53.Ra6 Kb3 54.g7 a2 55.Kf7 b4 56.g8Q?? Rg8 57.Kg8 Kb2 58.Kf7 b3 59.Ke6 a1Q 60.Ra1 Ka1 61.Kd5 b2 62.Kc4 b1Q 0–1. Fournier,Frederic (2045) – joseborges01 (1625), Active (5/0), 2004.

5.a3 Bd7 6.Be2 e6 7.0-0 Bd6 8.c4 dc4 9.Bc4 b5 10.Be2 0-0 11.d4 Ne7 12.Ne5 Ng6 13.Bf3 Ra7 14.Nd7 Qd7 15.Qc2 Rc8 16.Rc1 Nd5 17.e4 Nb6 18.e5 Be7 19.Bc6 Qd8 20.Rd1 Nc4 21.Bc3 Nf4 22.a4 ba4 23.Ra4 Nd5 24.Bb5 Nc3 25.Nc3 Nb6 26.Ra6 Ra6 27.Ba6 Ra8 28.Bb7 Ra7 29.Be4 g6 30.Qb3 Nd7 31.d5 f5 32.de6 1–0. Machete99 – CaptinCrunch, ICC, 2002.

5.a3 e5 6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 Ne4 10.Nd2 Nc3 11.Qc1 0-0 12.Nf3 h6 13.Bd3 f5 14.0-0 b5 15.Qd2 Ne4 16.Be4 fe4 17.Ne5 Bf5 18.f4 Rf6 19.c3 Raf8 20.a4 Qb6 21.ab5 ab5 22.Nd7?? Bd7-+ 23.Ra5 h5 24.Rfa1 h4 25.h3 Qb7 26.Ra7 Qc6 27.R1a6 Qc4 28.Ra5 Rg6 29.Kh2 Qf1 30.Ra1 Qc4 31.R1a5 Rg3 32.R5a6 Kh7 33.Rb7 Qf1 34.Rc7 Bh3! 35.Ra2 Bg2 (35...Bg2 36.Qg2 Rg2 37.Rg2 Rg8-+) 0–1. Fournier,Frederic (2005) – Jose42 (1765), Echecs21, 2003.

5.a3 e6 6.d4 Bd6 7.c4 dc4 8.Bc4 0-0 9.Nc3 (9.0-0 Bd7+=) 9...b5 (9...e5 10.d5 Ne7 11.Qd3=) 10.Bd3 Bb7 11.0-0 Nd5 (11...Qd7!?+=) 12.Nd5+- ed5 13.Qc2 h6 (13...g6 14.e4+-) 14.e4+- Be7 (14...de4 15.Be4 Qd7 16.Rfd1+-) 15.Rfe1 White prepares e5 15...Rb8 (15...Re8 16.Rac1+-) 16.Rac1 (16.ed5 Na7+-) 16...Bd6 17.e5 (17.ed5?! Ne7+-) 17...Be7 18.h3 (18.Re3 Ba8 19.Bc3 a5 20.ba5 Ba3+-) 18...Bg5 (18...Qe8 19.Qd2+-) 19.Ng5 Qg5 (19...hg5 20.Re2+-) 20.Re3 Rbd8 (20...Qh4 21.Qc5+-) 21.Rg3 Qe7 (21...Qh4 22.Qd2+-) 22.Qe2 Qe6 (22...Kh8 23.Qh5+-) 23.Qh5 Bc8 (23...Kh8+-) 24.Rc3 Nd4 (24...Rfe8 25.Bb1 Ne7+-) 25.Rc7 Nc6 (25...Rd7 26.Rd7 Bd7 27.Bd4 Be8+-) 26.Rc6! Qc6 27.e6! f6 (27...Qe6 28.Rg7 Mate attack; 27...Be6 28.Rg7 Mate attack; 27...fe6 28.Rg7 Mate attack) 28.Rg7!! Kg7 (28...Kg7 29.Qg6 Mate attack) 29.Qg6. Pierre – Chips, internet, 2020.

5.a3 e6 6.Be2 Bd6 7.0-0 0-0 8.d3 e5 9.Nbd2 e4 10.Nd4 (10.Bf6!? Qf6 11.de4+-) 10...ed3= 11.Bd3 Bg4?? (11...Ne5 12.Qe2=) 12.Be2 (12.Nc6!? Qe8 13.f3+-) 12...Qd7 (better 12...Be2!? 13.Qe2 a5=) 13.Nc6+= Be2 14.Qe2 bc6 15.Bf6 gf6 16.c4 f5 (16...a5 17.b5 cb5 18.cb5+=) 17.Nf3 Qe6 (17...Rfb8 18.Rfb1+=) 18.c5 (18.Nd4 Qf6+-) 18...Be7 (18...Be5!? 19.Rab1 Rfe8+=) 19.Nd4+- Qg6 20.Qf3 f4 (20...Rfe8!?+-) 21.Qf4+- f5? (better 21...Bd8+-) 22.Qc7 Bf6 (22...Rf7 23.Qc6 (23.Nc6?! Bf6 24.Qg3 Qg3 25.hg3 Ba1 26.Ra1 Kg7+-) 23...Qc6 24.Nc6+-) 23.Qc6 Ra7 (23...Rfd8 24.Qe6 Kf8 25.Nc6+-) 24.Qd5 Kh8 (24...Qf7 25.Qf5 Bd4 26.Qf7 Kf7 27.ed4+-) 25.Rad1 Bd4 26.Rd4 Rg7 27.g3 h5 (27...Qf7 28.Rfd1 Qc7 29.Qd6 Qd6 30.Rd6+-) 28.Rh4 (28.Rfd1 Kh7+-) 28...Kh7 (28...Qg5 29.Kh1+-) 29.Rd1 (better 29.Qf3 Kh6 30.Rd1+-) 29...Rff7 (29...Qh6+-) 30.Qf3 Kh6 31.Rd6 Rf6 (31...Rh7 32.Qh5 Kg7 33.Qg6 Kf8 34.Rd8 Ke7 35.Qd6) 32.Rf6 Qf6 (32...Kg5 33.Rf5! Qf5 34.Rh5 Kf6 35.Rf5 Ke7 36.Qb7 Ke6 37.Qd5 Ke7 38.Qd6 Ke8 39.Rf8) 33.Qh5 1–0. quebrantahuesos (1915) – Amun, lichess.org, 2015.

5.a3 Bf5 6.c4 e6 7.Nc3 (7.cd5 ed5 8.b5 Nb8=) 7...Qd7 (7...dc4 8.Bc4 Bd6 9.0-0=) 8.b5 (8.Nh4 Bg6=) 8...ab5 9.cb5 Na5 10.a4 (10.Ne5 Qd6 11.d4 Be7=) 10...c6 (10...Bd6 11.Ba3=+) 11.d4 (11.Nh4 e5=) 11...Ne4 (11...Bb4 12.Be2=+) 12.bc6 (better 12.Ne5 Qc7 13.Ne4 Be4 14.f3=) 12...Qc6?? (better 12...Nc6 13.Ne5 Qc7 14.Nc6 bc6 (14...Qc6?? 15.Bb5+-) 15.Ne4 Be4=) 13.Bb5+- Bb4 14.Bc6 bc6 15.0-0 (better 15.Rc1!? Nc4 16.Qe2 Nb2 17.Qb2 Bc3 18.Rc3 Nc3 19.Qc3 0-0+-) 15...Nc3 16.Bc3 (16.Qe1 Na2 17.Qe2 Nc3 18.Bc3 Bc3+-) 16...Bc3 17.Rc1 (17.Ra2 Nc4+-) 17...Bb2 18.Rc5 0-0? (18...Ba3 19.Rc3 Bb4 20.Rc1+-) 19.Ne5 (better 19.Qd2 Nc4 20.Rc4 dc4 21.Qb2 Ra4+-) 19...Ra6?? (19...Ba3 20.Ra5! Ra5+-) 20.Qe2 Rb8 (20...Nb7 21.Qb2 Nc5 22.dc5 Rfa8+-) 21.Qa6 f6 22.Nc6 (better 22.Nd7 Rd8 23.Ra5 Bc3+-) 22...Nc6 23.Rc6 e5 (23...Ba3 24.Rc8 Rc8 25.Qc8 Kf7 26.a5+-) 24.Rb6 Rb6 25.Qb6 Bc3 26.Rc1 Bd2 27.Rc7 h6 28.Qb7 (28.Qb7 Be4 29.Rg7 Kh8 30.Qf7 Be3 31.Qg8; 28.Qb8 Bc8 29.Qc8 Kh7 30.Qg4 Be3 31.Qg7) 1–0. Petzold,Annika – Landmann,Bastian, Oberfraenkische Einzelmeisterschaft U14, 2017.

5.a3 h6 6.c4 dc4 7.Bc4 Bf5 8.Bf6 gf6 9.d4 e6 10.Nc3 Bg7 (10...Rg8 11.d5 Ne5 12.Ne5 fe5 13.e4+=) 11.0-0 0-0 (11...Bg4 12.Ne4+=) 12.d5+/- ed5 1-0. pcmvr - dsteel (2220), net-chess.com, 2021.

5.b5 ab5 6.Bb5 Bd7 7.0-0 e6 8.d3 Bc5 9.Nbd2 0-0 10.e4 de4 11.de4 Qe7 12.e5 (12.Qe2 Rfd8=) 12...Nd5 (better is 12...Ne5!? 13.Be2 Nf3 14.Bf3 Ra7-/+) 13.a4 Ra7 (better is 13...Rfd8!?=) 14.Ne4+= Rfa8 (14...Nb8!?+=) 15.Bc6 Bc6 16.Nc5 Qc5 17.Bd4 Qc4 18.Ba7 Ra7 19.Qd4 Qd4 20.Nd4 Ba4 21.c4 Ne7? (better is 21...Nb6 22.Nb5 Ra5+-) 22.Nb5 Ra5 (22...Ra6 23.Nc7 Ra7 24.Rfb1+-) 23.Nc3 (23.Nc7?! h6+-) 23...Re5 24.Ra4 g6 25.Ra7 (25.f4!? Rc5+-) 25...Rc5 26.Rb7 Rc4 27.Nb5 Nd5 28.Na3 Ra4 29.Nc2 c5 30.Ra1 Rc4?! (30...Ra1 31.Na1 c4+-) 31.Ne3 Rd4 (31...Rb4 32.Raa7 Rb7 33.Rb7 Ne3 34.fe3+-) 32.Nd5 (better is 32.Raa7!? Ne3 33.fe3 Rd1 34.Kf2 Rd5+-) 32...ed5 33.Kf1 c4 34.Rc7 Kg7 35.Ke2 (35.Raa7!? Rf4+-) 35...Re4 36.Kf3 Kf6 37.Ra6 Ke5 38.Re7 Kd4 39.Re4 de4 40.Ke2 f5 41.Kd2 f4 42.Re6 e3 (42...g5+-) 43.fe3 fe3 44.Re3 g5 45.g4 Kd5 46.Kc3 Kc5 (46...h6 47.Re8+-) 47.Re4 1–0. Torres Herrero,Fernando – Perez Muelas,Donato, Valladolid San Mateo op, 1987.

6.Be2 Qd6 7.h3 Bf5 8.g4 =.

6.Be2 e5 7.0-0 Qd6 8.d3 Be7 9.Nbd2 Nd7 white timed out. defesa (2145) – grahamtrue (2165), net–chess.com, 2014.

6.Be2 e6 7.0-0 Bd6 8.h3 Bh5 9.d3 0-0 10.Nbd2 e5 11.c4 b5 (11...Re8!?+=) 12.c5+/– Be7 13.Ne5 Be2 14.Qe2 Ne5 15.Be5 c6 16.Nb3 Nd7 17.Bd4 Bf6 18.Bf6 Qf6 19.Nd4 a5 20.Qf3 Qe7?? (better is 20...Qf3 21.gf3 Ra6+/–) 21.Nc6+- Qg5 22.Na5 (22.Qd5! Qd5 23.Ne7 Kh8 24.Nd5 Rfd8+-) 22...Ra5?! (22...Nc5 23.h4 Qh4 24.Qd5 Na4+-) 23.ba5 Nc5 24.d4 (24.Rab1 Rb8+-) 24...Nb3 (24...Ne4 25.Qe2+-) 25.Rab1 (better is 25.Ra2 Na5 26.Rb1 Rd8+-) 25...Nd2 26.Qe2 Nf1 27.Kf1 Qf6 28.Qb5 h6 29.Qd5 Rd8 30.Qc5 Ra8 31.Rb6 Qd8 32.a6 Rc8 33.Qb4 Rc1 34.Ke2 Rc2 35.Kd3 Rc3 36.Kc3 (36.Kc3 Kh7 37.Qa5 Qc8 38.Kb3+-) 1–0. Hal1958 – Organic, playchess.de, 2006.

6.Be2 e6 7.0-0 Bd6 8.h3 Bh5 9.d3 0-0 10.Nbd2 h6 11.c4 Be7 12.cd5 Nd5 13.Nc4 b5 14.Nce5 Bf3 15.Nc6 (worse is 15.gf3 Ne5 16.Be5 Bf6 17.Bf6 Qf6+= (worse is 17...gf6 18.d4=)) 15...Be2 16.Qe2 Qd6 17.Ne7 Qe7 18.Qg4 f5 19.Qe2 a5 20.ba5 Ra5 21.Rfc1 Rfa8 22.Qc2 Ra4 23.e4 fe4 24.de4 Nf6 25.Qc7 Qc7 26.Rc7 R8a7 (better is 26...b4!? 27.Rc4 ba3 28.Ra4 Ra4 29.Ra3 Ra3 30.Ba3 Ne4=) 27.Ra7+/– Ra7 28.Bf6 gf6 29.f3 Ra4 30.Rb1 Ra3 31.Rb5 Kg7 32.Rb6 e5 33.Rb7 Kg6 34.Rb6 ½–½. mr5reasons1 (1660) – sonata296 (1655), gameknot.com, 2013.

6.Be2 Bf3 7.Bf3 e5 8.0-0 Qd7 9.d3 0-0-0 10.Nd2 h5 11.Qc1 g5 12.c4 g4 13.Be2 Bg7 (better is 13...dc4!? 14.Nc4 Qe6+=) 14.b5+- ab5 15.cb5 Na5 (better is 15...Na7 16.Be5 Nb5+-) 16.Be5 Ne8? (16...Qe7 17.d4 Ne8 18.Bg7 Ng7+-) 17.Bg7 Ng7 18.Qc3 Qb5 19.Qg7 Qd7 20.Qc3 Nc6 21.Rfb1 Rh6 22.d4 h4 23.Qb3 Na5 (23...b6 24.Ba6 Kb8 25.a4+-) 24.Qb5 Qb5 25.Rb5 (worse is 25.Bb5 c6 26.Bd3 Kc7+-) 25...Nc6 26.Bg4 Kb8 27.Bf3 Ne7 28.a4 Rdd6 29.a5 Ka7 30.Rab1 b6 31.ab6 cb6 32.Ra1 Kb7 (32...Kb8 33.Kf1+-) 33.Nc4 1–0. mr5reasons1 (1685) – mikethepawn (1620), gameknot.com, 2013.

6.Be2 Bf3 7.Bf3 e5 8.0-0 Be7 9.c4 e4 10.Be2 0-0 11.cd5 Qd5 12.Nc3 Qd8 (12...Qe5 13.f3=) 13.f3 ef3 14.Rf3 (14.Bf3 Qd3+=) 14...Ne5= 15.Rh3 Nd3 16.Bd3 (16.Qc2 Nb2 17.Qb2 a5=) 16...Qd3=+ 17.e4 Qd4 18.Re3 Ne4 (18...Rfd8 19.Qe2 Qd2 20.Nd5 Qe2 21.Ne7 Kf8 22.Re2 Ke7 23.Rf1=) 19.Ne4 (19.Na4 Qa7 20.Qc2 f5 21.Qc4 Rf7=+) 19...Qb2 20.Nc3 Bf6 (20...Bg5 21.Rd3 Rad8 22.Rb1 Qa3 23.Rd8 Rd8 24.Rb3 Qb3 25.Qb3 Bd2 26.Ne4+-) 21.Ra2 Bc3 Exerts pressure on d2 22.Rb2 Bb2 23.d4 Rad8 24.Rd3 Rd6 25.Qd2 Re8?? (better 25...Ba1 26.d5 Re8=) 26.Qb2+- Re1 27.Kf2 Re8 28.Re3 Rf6 29.Ke2 Rd8 (29...Re3 30.Ke3 c6 31.Qc3 Re6 32.Kf2+-) 30.b5 Rf8 (30...Rg6 31.g3+-) 31.Re7 ab5 (31...Rb6 32.Rc7 Rb5 33.Qc3+-) 32.Rc7 Rb6 33.Qb4 Re6 34.Kd3 Rfe8 35.Qb5 Re3 36.Kc4 Rf8 (36...b6 37.Rb7+-) 37.Rb7 (37.a4!? Ra3+-) 37...Ra3 38.Rb8 Ra7 (38...Ra4 39.Kc5 Ra8 40.Ra8 Ra8+-) 39.Rf8 (39.Qe8! Rc7 40.Kd3 h6 41.Qf8 Kh7+-) 39...Kf8 40.Qb8 (40.Qb8 Ke7 41.Qa7 Kf6 42.d5+-) 1–0. Dumontelle,Joe – Blake, March, 1979.

6.Be2 Bf3 7.Bf3 e5 8.d3 Bd6 9.Nd2 0-0 (9...a5 10.b5 Ne7 11.c4+=) 10.0-0 e4 11.de4 de4 (11...Ne4 12.c4 Nd2 13.Qd2 dc4+=) 12.Ne4 (better is 12.Bf6 Qf6 13.Ne4+-) 12...Ne4= 13.Be4 Re8?? (better is 13...Bh2 14.Kh2 Qh4 15.Kg1 Qe4=) 14.Bc6 bc6 15.Qg4 f6 16.Rad1 (16.Qc4 Kh8+-) 16...a5 17.c4 Qb8?? (better is 17...ab4 18.ab4 Ra2+-) 18.Bf6 Bf8 19.Bg7! Bg7 20.Rd7 Re7 21.Re7 Qf8 22.Rc7 ab4 23.ab4 Kh8 24.Rg7! Qg7 25.Qg7 Kg7 26.b5 c5 27.Rb1 Kf6 28.g4 Rb8 29.Kg2 Rb6 30.f4 h6 31.h4 White intends g5 31...Rb7 32.Kf3 Re7 33.b6 Rb7 34.e4 White prepares the advance f5 34...Ke6 35.g5 hg5 36.hg5 Kf7 37.Kg4 Kg6 38.f5 Kf7 39.e5 White plans f6 39...Kg7 40.e6 Kf8 41.f6 Kg8 42.Kf5 Kf8 43.g6 Kg8 44.Rh1 Rb6 45.e7 Rf6 46.Ke5 Kg7 47.e8N Kg6+- 48.Nf6 Kf7 49.Rh7 Kg6 50.Ke6 Kg5+- 51.Rh5 Kf4 52.Rc5 Ke3 53.Rc8 Kd4 54.c5 Kc4 55.c6 Kc5 56.Kd7 Kb6 57.Rb8 Ka7 58.c7 Ka6 59.c8Q Ka5 60.Qc7 Ka4 61.Qa7. Fournier,Frederic (1925) – carmenmata (1825), Active, 2002.

6.Be2 Bf3 7.Bf3 e5 8.d3 Be7 (8...Bd6 9.Nd2=) 9.c4 0-0 (better is 9...e4!? 10.cd5 ef3 11.dc6 fg2+/–) 10.cd5+/– Nd5 11.Qb3 Nf6 12.Bc6 bc6 13.Be5 c5 14.bc5 (14.Qc4 cb4 15.ab4+= (15.Qc7? Qc7 16.Bc7 Rfc8-+; 15.Bc7? Qd7-+)) 14...Bc5 (14...Nd7 15.Bd4 Bc5 16.Bb2+/–) 15.Qc3+/– Qe7 (15...Be7!?+/–) 16.Bf6+- gf6 (16...Qf6 17.Qf6 gf6 18.d4+-) 17.Nd2 Qe5? (better is 17...Bd6+-) 1–0. Machete (2320) – capablanka (1710), ICC, 2003.

5.a3 e6 6.c4 dc4 7.Bc4 (7.Bf6 gf6 8.Bc4 Rg8=) 7...Be7 (7...b5 8.Bf6 gf6 9.Bf1+=) 8.0-0 0-0 9.Be5 Qc6 10.Be2 Bd7 (10...Nbd7 11.d4+=) 11.Nc3 Bd6 12.Bd4 Ne4 13.Qb1 Nc3 14.dc3 f6 (14...Qd5 15.e4 Qh5 16.e5+-) 15.Bd3 e5? (better 15...f5+-) 16.Bh7+- Kh8 17.Be4 Qb5 18.c4! Qc4 19.Bb7 Nc6 (19...Bc6 20.Rc1 Qc1 21.Qc1 Bb7 22.Bc5+-) 20.Ba8 Ra8 21.Bc5! Bc5 (21...Qe6 22.Bd6 cd6 23.Qe4+-) 22.Rc1 (22.bc5?! Rb8 23.Qg6 Be8+-) 22...Qg4 23.Rc5 (23.bc5?! Rb8 24.Qa2 Be6+-) 23...Bf5 (23...Rb8 24.Qc2 Rb6 25.e4+-) 24.h3 (24.Qa2 Na7+-) 24...Qg6 25.Qc1 Be4 26.Nh4 (26.Rc6?! Bf3 27.g3 Bc6 28.Qc6 Ra7+-) 26...Qg5 27.g3 Qg4 (27...Nd8 28.Rc7 Kh7+-) 28.hg4 (28.Rc6?! Qh3 29.f3 Qg3 30.Ng2 Qf3+-) 28...Nb4 29.ab4 (29.ab4 Bd3 30.Qd2+-) 1–0. Pierre – Shuriya, internet, 2020.

5.a3 Bg4 6.Be2 Qb6 (6...Nbd7 7.h3 Bf3 8.Bf3=) 7.Nc3 c5 (better is 7...Nbd7!?=) 8.Na4+/– Qc7 9.Be5 Qc6 10.Nc5 Bf3 11.Bf3 b6 (11...Nfd7 12.Bb8 Nc5 13.Be5+/–) 12.Nb3 (12.Bf6 bc5 13.Bb2 cb4 14.ab4 e6+-) 12...Nbd7+/– 13.Bb2 e6 14.0-0 (14.Rc1 e5+/–) 14...Bd6 15.Rc1 Qc7 (15...Ne5 16.Be5 Be5 17.d4+/–) 16.g3 (16.c4 Bh2 17.Kh1 Qd6+-) 16...Ne5 (16...b5!?+/–) 17.Be5+- Be5 18.c4! Qb8 (18...dc4 19.Ba8 Pinning (19.Ba8 Deflection)) 19.d4 Bc7? (19...Bd6 20.Nd2+-) 20.Nd2 (better is 20.cd5!? ed5 21.Qc2 Ra7 22.Qc6 Ke7 23.Bd5 Rd8+-) 20...Ra7 (20...0-0 21.cd5 Nd5 22.Qc2+-) 21.cd5 Nd5 22.e4 (22.Bd5 ed5 23.Qa4 Kd8+-) 22...Ne7 23.d5 0-0 (23...ed5 24.ed5 0-0 25.Re1+/–) 24.de6+- fe6 25.Qb3 Rf6 (25...Kh8 26.Qe6 Be5 27.Nc4 Rf3 28.Qe5 Qe5 29.Ne5 Ra3 30.Nc6 Nc6 31.Rc6+-) 26.Bg4 Qc8 (26...b5 27.Be6 Kh8 28.Kg2+-) 27.Rc2 (27.Nf3!? Kh8+-) 27...Qd7 (27...Rg6 28.h3+-) 28.Nf3 (28.Rfc1 Rb7+-) 28...Ng6 29.Ng5 Nf8 30.Rd1 Qe7 (30...Qe8 31.Rdc1 h6 32.Rc7 Rc7 33.Rc7 hg5 34.Ra7+-) 31.Rc6 Rg6 (31...Kh8 32.Ne6 a5 33.f4+-) 32.Be6 Ne6 (32...Kh8 33.Nf7 Qf7 34.Bf7 Rc6+-) 33.Ne6 Kh8 34.Rc7 (34.Rc7 Rc7 35.Rd8 Qd8 36.Nd8+-) 1–0. zabazaba (1660) – dm1980 (1645), gameknot.com, 2014.

5.c4 c6 6.d4 b5 7.c5 Ne4 8.Nbd2 Ndf6 9.Bd3 Bf5 10.Qc2 (10.Ne5 Nd2 11.Qd2 Bd3 12.Qd3 Qc8+/–) 10...Bg6 11.Ne5 Nd2 12.Bg6 (12.Qd2!? Bd3 13.Qd3+/–) 12...hg6+= 13.Nc6?? (better is 13.Qd2 Qc7 14.a4+/–) 13...Qc7 14.Qd2 Qc6 15.h3 Ne4 16.Qc2 e6 17.a4 Rb8 18.ab5 ab5 19.0-0 Be7 20.Ra7 Bh4 (20...Ra8 21.Ra8 Qa8 22.f3-+) 21.g3? (21.Qd3 0-0-+) 21...Bf6 (better is 21...Bd8!? 22.Kg2 Bb6-+) 22.Kg2 Ra8 23.Ra8 Qa8 24.f3 Ng5 25.h4 Nh7 26.c6 0-0 27.Ra1 Qc8 28.Ra5 (28.Qc5 g5 29.hg5 Ng5=) 28...Bd8 (better is 28...Qc7!? 29.Rb5 Rc8-/+) 29.Rb5= Bc7 (better is 29...g5!?=) 30.Rb7+/– Nf6 31.b5 Ne8 32.b6 Nd6?? (better is 32...Bb6 33.Rb6 Nd6+-) 33.Rc7 (33.bc7?! Nb7 34.cb7 Qb7=) 33...Qb8 (33...Qa6 34.b7 Nc4+-) 34.Qc5 Nc4 35.Rb7 White prepares the advance c7 35...Qa8 (35...Ne3 36.Kf2 Nd1 37.Ke2 Qg3 38.Qf8 Kf8+-) 36.Ra7 Qd8 (36...Nb6 37.Ra8 Na8+-) 37.c7 Ne3 38.Kg1 Qf6 39.Qf8! Kf8 (39...Kf8 40.c8R) 40.c8Q 1–0. Schroeder,Ralf (1670) – Schmole_Rostosky,Joachim, Lichtenberger Sommer, 2015. (=1.Nf3 Nf6 2.e3 d5 3.b4 a6 4.Bb2 Nbd7)

5.Be2 e6 6.a3 c5 7.bc5 Bc5 8.0-0 Qc7 9.a4 b6 (9...0-0!?=) 10.d4+= Bd6 11.Ba3 (11.Nbd2 0-0+=) 11...Ng4 (11...Ne4!?=) 12.Bd6+- Qd6 13.h3 h5 (13...Ngf6 14.Nbd2+-) 14.Qc1 (14.Nbd2 Ngf6+-) 14...Ra7 (14...Ngf6 15.c4+-) 15.Qa3 (better 15.c4 Ngf6 16.Nbd2+-) 15...Qb8? (better 15...Qa3 16.Ra3 Ngf6+=) 16.Nbd2+- (16.hg4?! hg4 17.Nbd2 gf3 18.Nf3 g5=) 16...f6 (16...Bb7 17.c4+- (17.hg4?! hg4 18.g3 gf3 19.Nf3 Ra8+-)) 17.c4 (17.hg4 hg4 18.g3 gf3 19.Bf3 f5+-) 17...Kf7 18.cd5 (18.hg4?! hg4 19.cd5 ed5+-) 18...ed5 19.Qb3 (19.hg4?! hg4 20.g3 gf3 21.Bf3 Bb7+-) 19...Kf8 (19...Bb7+-) 20.Qd5 (20.hg4?! hg4 21.g3 gf3 22.Bf3 Bb7+-) 20...Bb7 21.Qe6 (better 21.Qb3 Nh6 22.Nh4+-) 21...Bc8 (21...Nh6+-) 22.Rac1 Ra8 (22...Nc5 23.Qc4 a5 24.Qc3+-) 23.Rc8! Qc8 24.hg4 hg4 25.Qg4 Qc6 (25...g5+-) 26.Nh4 g5 27.Ng6 Kg7 28.Nh8 Rh8 29.Bf3 (29.Ba6 Qc7 30.g3 Nf8+-) 29...Qc7 (29...Qc8 30.Qe6 Re8 31.Qd6+-) 30.g3 Nf8 (30...b5 31.ab5 ab5 32.Ne4+-) 31.Ne4 Rh6 (31...Qd7 32.Rb1 Qc7 33.Qf5+-) 32.Kg2 (32.Rb1 a5+-) 32...Kg6 33.Rh1 (better 33.Be2 b5 34.ab5 ab5 35.Bb5+-) 33...Qh7 (33...Rh1 34.Kh1 Qh7 35.Kg2 Qd7 36.Qd7 Nd7+-) 34.Rh6 Qh6 35.Nd6 Qh8 36.Be4 (36.Qe4 Kg7 37.Qe7 Kh6 38.Nf5 Kg6 39.Qe8 Kh7 40.Qf7 Qg7 41.Qg7) 36...Kg7+- 37.Qc8 Qh5 38.Nf5 Kf7 (38...Kg8 39.Bd5 Qf7 40.Qb7 Qd5 41.Qd5 Kh8 42.Qd8 Kg8 43.Qf6 Ne6 44.Qe6 Kf8 45.Qe7 Kg8 46.Qg7) 39.Qc7 (39.Qc7 Nd7 40.Qd7 Kf8 41.Qe7 Kg8 42.Qg7; 39.Bd5 Ne6 40.Be6 Kg6 41.Qg8) 1–0. Lance5500 (2610) – IrinaC (2040), lichess.org, 2016.

5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

5.Be2 Nc6 6.a3 e6 7.h3 Bh5 8.c4 Ne4 (8...dc4!? 9.Bc4 Bd6=) 9.d3+= Bf3 10.Bf3 Nd6 (10...Ng5!? 11.Bh5 dc4+/–) 11.cd5+- ed5 12.Bd5 Qd7 13.0-0 0-0-0 14.Qf3 f6 15.Bc6 bc6 (15...Qc6 16.Qc6 bc6 17.Rc1+-) 16.Nd2 Kb7 17.Nb3 Nc8 (17...Nf7+-) 18.Na5 Kb6 (18...Ka8 19.Nc6 Na7 20.Nd8 c6 21.Nc6 Qc6+-) 19.Bd4 (19.Bd4 Kb5 20.a4 Kb4 21.Rfb1 Ka5 22.Bc3 Bb4 23.Rb4 Qd3 24.Rb5) 1–0. Fournier,Frederic (2245) – JeanCorinthians, queenalice.com (challenge), 2009.

5.Be2 Nc6 6.a3 Bf3 7.Bf3 e5 8.d3 Bd6 9.Nd2 Qe7 10.c4+= e4 11.cd5 Nb4? 12.Ne4+- Nbd5 13.Nf6 Nf6 14.Bb7 Rb8 15.Bc6 Kf8 16.Qc2 Ng4 17.Rb1 Nh2 18.Bd4 Rb1 19.Qb1 Qd8 20.Qb2 f6 21.f3 Ke7 22.Qb8 0–1. pcmvr – calcar, net–chess.com, 2010.

5.Be2 e6 6.a3 Nc6 7.0-0 Bd6 8.c4 (8.d3 Bf3 9.Bf3 a5+=) 8...dc4 9.Bc4 0-0 10.d4 e5 11.de5 Bf3 12.Qf3 Ne5 13.Qe2 White prepares b5 13...a5 14.b5 Nc4 15.Qc4 c5 16.bc6 bc6 17.h3 Rb8 18.Qc2 Qe7 19.Nd2 Rfc8 20.Rfd1 Rb2 (20...Nd5!?=) 21.Qb2+= Be5 22.Qb6 Ba1 23.Ra1 Qd8 24.Qd8 Rd8 25.Nb3 a4 26.Nc5 Ra8 27.Rc1 Kf8 28.Rc4 Ke7 29.Na4 Kd6 30.Kf1 Ra5 31.Ke2 h5 32.Rd4 Kc7 33.Rc4 (33.Rf4 Nd7+/–) 33...Kd6 (33...Ne8!? 34.Nc3 Nd6=) 34.Kd3 c5 35.g4 (35.Kc2!?+/–) 35...hg4= 36.hg4 g5 37.Kc3 Kd5 38.f3 Nd7 39.Re4 ½–½. Cottarelli,Franco – Wochnik,Manfred, corr, 2000.

5.Be2 e6 6.a3 Nc6 7.Ne5 Ne5 8.Be5 Be2 9.Qe2 Bd6 10.Bd6 Qd6 11.0-0 0-0 12.d3 (12.Nc3 Rfd8+=) 12...d4 (12...a5 13.b5+=) 13.Nd2= b5 14.ed4 Qd4 15.Nf3 Qd6 (15...Qc3 16.Qd2 Qd2 17.Nd2=) 16.g3 h6 17.Rfe1 c5 18.c3 Rad8 19.Rad1 cb4 20.cb4 Rc8 21.Rc1 Nd5 22.Qd2 Rc1 23.Rc1 Ne7 24.Qe3 Rd8 25.Rd1 ½–½. Hasler,Ueli (1710) – Mangold,Wagner (1795), CiF, 2005.

5.Be2 e6 6.a3 Bd6 7.c4 dc4 8.Bc4 e5 (8...0-0 9.h3 Bh5 10.Nc3=) 9.Qb3 (9.h3 Bf5 10.Be5 Nc6+/–) 9...Qe7+= 10.h3 Bh5 11.g4 Bg6 12.Nc3 0-0 13.0-0-0 (better is 13.Nh4!?+=) 13...b5 (13...a5!? 14.h4 ab4 15.ab4 Nc6-/+) 14.Be2+= Nbd7 15.g5 (15.d4!?+=) 15...Ne4-/+ 16.Ne4 Be4 17.d3 Bf5 (better is 17...Bb7!? 18.d4 e4-/+) 18.d4= ed4 (18...Rae8!?=) 19.Nd4+= (19.Bd4? c5 20.Qd5 cd4 21.Qf5 de3-+) 19...Be4 (19...Qg5?? 20.Rhg1 Qf6 21.Nf5+-) 20.f3 Bg6 21.h4 c5?? (better is 21...Rae8+/–) 22.Nc6+- Qe6 (22...Qe8 23.Rd6 cb4 24.ab4+-) 23.Qe6 fe6 24.Rd6 Nb8 25.Nb8 (25.h5 Be8 26.Ne7 Kf7+-) 25...Rfb8 26.h5 Bf7 (26...Be8 27.h6 g6 28.Re6+-) 27.Rd7 cb4 28.ab4 Rc8 29.Kd2 a5 30.g6 Be8 31.Rg7 Kf8 32.gh7 1–0. Schoenegg,Rolf (1945) – Sroubova,Lenka, Karlovy Vary op, 2009.

5.Be2 Bf3 6.Bf3 Nc6 7.a3 e5 8.d3 Bd6 9.0-0 0-0 (9...e4 10.Be2=) 10.c4 (better 10.Nd2+=) 10...Ne7?? (10...dc4!? 11.Bc6 bc6 12.dc4 a5=) 11.cd5?? (better 11.c5+-) 11...Nfd5 (11...Ned5 12.Nc3 Nc3 13.Bc3+=) 12.Qb3 c6 13.Nd2 Bc7 14.Rac1 Ng6 15.Bd5 (15.g3 Re8+-) 15...cd5+= 16.Rc5 Ne7 17.Rfc1 Bd6 18.R5c2 Qd7 19.Nf3 f6 20.e4 Kh8 21.ed5 Qb5 22.Nh4 (22.Nd2 Qd5 (worse 22...Nd5 23.a4 Qb4 24.Qd5+-) 23.Qc4 Rad8+=) 22...g6= (22...Nd5?? 23.a4 Qb4 24.Qd5 Qh4 25.Rc4+- (25.Qd6?! Qa4 26.Rc4 Qb5+-)) 23.d4 e4 (23...Nd5?? 24.a4 Qb4 25.Qd5+-) 24.f3 ef3 25.Nf3 Qd5 (25...Nd5 26.Rc5 Bc5 27.Rc5+-) 26.Qe3 Nf5 27.Qd3 Bf4 28.Re1 Rfe8 29.Rce2 Re2 30.Re2 Rc8 31.g3 Bh6 32.Qe4?? (better 32.a4=+) 32...Qe4-+ 33.Re4 Rc2 34.Re8 (34.Ba1 Be3 35.Kh1 Rc1 36.Kg2 h5-+ (36...Ra1?! 37.g4-/+)) 34…Kg7 0–1. GuestQVBQ – GuestVBJD, freechess.org, 2017.